chore: 添加虚拟环境到仓库

- 添加 backend_service/venv 虚拟环境
- 包含所有Python依赖包
- 注意：虚拟环境约393MB，包含12655个文件

backend_service/venv/lib/python3.13/site-packages/aiohttp/.hash/_cparser.pxd.hash

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+5276d46021e0e0d7577e0c9155800cbf62932d60a50783fec42aefb63febedec  /home/runner/work/aiohttp/aiohttp/aiohttp/_cparser.pxd

backend_service/venv/lib/python3.13/site-packages/aiohttp/.hash/_find_header.pxd.hash

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+d067f01423cddb3c442933b5fcc039b18ab651fcec1bc91c577693aafc25cf78  /home/runner/work/aiohttp/aiohttp/aiohttp/_find_header.pxd

backend_service/venv/lib/python3.13/site-packages/aiohttp/.hash/_http_parser.pyx.hash

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+b660353da267ec7f14d67c97b681c9578e29c58573a9701fd548096983dac36f  /home/runner/work/aiohttp/aiohttp/aiohttp/_http_parser.pyx

backend_service/venv/lib/python3.13/site-packages/aiohttp/.hash/_http_writer.pyx.hash

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+56514404ce87a15bfc6b400026d73a270165b2fdbe70313cfa007de29ddd7e14  /home/runner/work/aiohttp/aiohttp/aiohttp/_http_writer.pyx

backend_service/venv/lib/python3.13/site-packages/aiohttp/.hash/hdrs.py.hash

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+dab8f933203eeb245d60f856e542a45b888d5a110094620e4811f90f816628d1  /home/runner/work/aiohttp/aiohttp/aiohttp/hdrs.py

backend_service/venv/lib/python3.13/site-packages/aiohttp/__init__.py

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+__version__ = "3.13.2"
+
+from typing import TYPE_CHECKING, Tuple
+
+from . import hdrs as hdrs
+from .client import (
+    BaseConnector,
+    ClientConnectionError,
+    ClientConnectionResetError,
+    ClientConnectorCertificateError,
+    ClientConnectorDNSError,
+    ClientConnectorError,
+    ClientConnectorSSLError,
+    ClientError,
+    ClientHttpProxyError,
+    ClientOSError,
+    ClientPayloadError,
+    ClientProxyConnectionError,
+    ClientRequest,
+    ClientResponse,
+    ClientResponseError,
+    ClientSession,
+    ClientSSLError,
+    ClientTimeout,
+    ClientWebSocketResponse,
+    ClientWSTimeout,
+    ConnectionTimeoutError,
+    ContentTypeError,
+    Fingerprint,
+    InvalidURL,
+    InvalidUrlClientError,
+    InvalidUrlRedirectClientError,
+    NamedPipeConnector,
+    NonHttpUrlClientError,
+    NonHttpUrlRedirectClientError,
+    RedirectClientError,
+    RequestInfo,
+    ServerConnectionError,
+    ServerDisconnectedError,
+    ServerFingerprintMismatch,
+    ServerTimeoutError,
+    SocketTimeoutError,
+    TCPConnector,
+    TooManyRedirects,
+    UnixConnector,
+    WSMessageTypeError,
+    WSServerHandshakeError,
+    request,
+)
+from .client_middleware_digest_auth import DigestAuthMiddleware
+from .client_middlewares import ClientHandlerType, ClientMiddlewareType
+from .compression_utils import set_zlib_backend
+from .connector import (
+    AddrInfoType as AddrInfoType,
+    SocketFactoryType as SocketFactoryType,
+)
+from .cookiejar import CookieJar as CookieJar, DummyCookieJar as DummyCookieJar
+from .formdata import FormData as FormData
+from .helpers import BasicAuth, ChainMapProxy, ETag
+from .http import (
+    HttpVersion as HttpVersion,
+    HttpVersion10 as HttpVersion10,
+    HttpVersion11 as HttpVersion11,
+    WebSocketError as WebSocketError,
+    WSCloseCode as WSCloseCode,
+    WSMessage as WSMessage,
+    WSMsgType as WSMsgType,
+)
+from .multipart import (
+    BadContentDispositionHeader as BadContentDispositionHeader,
+    BadContentDispositionParam as BadContentDispositionParam,
+    BodyPartReader as BodyPartReader,
+    MultipartReader as MultipartReader,
+    MultipartWriter as MultipartWriter,
+    content_disposition_filename as content_disposition_filename,
+    parse_content_disposition as parse_content_disposition,
+)
+from .payload import (
+    PAYLOAD_REGISTRY as PAYLOAD_REGISTRY,
+    AsyncIterablePayload as AsyncIterablePayload,
+    BufferedReaderPayload as BufferedReaderPayload,
+    BytesIOPayload as BytesIOPayload,
+    BytesPayload as BytesPayload,
+    IOBasePayload as IOBasePayload,
+    JsonPayload as JsonPayload,
+    Payload as Payload,
+    StringIOPayload as StringIOPayload,
+    StringPayload as StringPayload,
+    TextIOPayload as TextIOPayload,
+    get_payload as get_payload,
+    payload_type as payload_type,
+)
+from .payload_streamer import streamer as streamer
+from .resolver import (
+    AsyncResolver as AsyncResolver,
+    DefaultResolver as DefaultResolver,
+    ThreadedResolver as ThreadedResolver,
+)
+from .streams import (
+    EMPTY_PAYLOAD as EMPTY_PAYLOAD,
+    DataQueue as DataQueue,
+    EofStream as EofStream,
+    FlowControlDataQueue as FlowControlDataQueue,
+    StreamReader as StreamReader,
+)
+from .tracing import (
+    TraceConfig as TraceConfig,
+    TraceConnectionCreateEndParams as TraceConnectionCreateEndParams,
+    TraceConnectionCreateStartParams as TraceConnectionCreateStartParams,
+    TraceConnectionQueuedEndParams as TraceConnectionQueuedEndParams,
+    TraceConnectionQueuedStartParams as TraceConnectionQueuedStartParams,
+    TraceConnectionReuseconnParams as TraceConnectionReuseconnParams,
+    TraceDnsCacheHitParams as TraceDnsCacheHitParams,
+    TraceDnsCacheMissParams as TraceDnsCacheMissParams,
+    TraceDnsResolveHostEndParams as TraceDnsResolveHostEndParams,
+    TraceDnsResolveHostStartParams as TraceDnsResolveHostStartParams,
+    TraceRequestChunkSentParams as TraceRequestChunkSentParams,
+    TraceRequestEndParams as TraceRequestEndParams,
+    TraceRequestExceptionParams as TraceRequestExceptionParams,
+    TraceRequestHeadersSentParams as TraceRequestHeadersSentParams,
+    TraceRequestRedirectParams as TraceRequestRedirectParams,
+    TraceRequestStartParams as TraceRequestStartParams,
+    TraceResponseChunkReceivedParams as TraceResponseChunkReceivedParams,
+)
+
+if TYPE_CHECKING:
+    # At runtime these are lazy-loaded at the bottom of the file.
+    from .worker import (
+        GunicornUVLoopWebWorker as GunicornUVLoopWebWorker,
+        GunicornWebWorker as GunicornWebWorker,
+    )
+
+__all__: Tuple[str, ...] = (
+    "hdrs",
+    # client
+    "AddrInfoType",
+    "BaseConnector",
+    "ClientConnectionError",
+    "ClientConnectionResetError",
+    "ClientConnectorCertificateError",
+    "ClientConnectorDNSError",
+    "ClientConnectorError",
+    "ClientConnectorSSLError",
+    "ClientError",
+    "ClientHttpProxyError",
+    "ClientOSError",
+    "ClientPayloadError",
+    "ClientProxyConnectionError",
+    "ClientResponse",
+    "ClientRequest",
+    "ClientResponseError",
+    "ClientSSLError",
+    "ClientSession",
+    "ClientTimeout",
+    "ClientWebSocketResponse",
+    "ClientWSTimeout",
+    "ConnectionTimeoutError",
+    "ContentTypeError",
+    "Fingerprint",
+    "FlowControlDataQueue",
+    "InvalidURL",
+    "InvalidUrlClientError",
+    "InvalidUrlRedirectClientError",
+    "NonHttpUrlClientError",
+    "NonHttpUrlRedirectClientError",
+    "RedirectClientError",
+    "RequestInfo",
+    "ServerConnectionError",
+    "ServerDisconnectedError",
+    "ServerFingerprintMismatch",
+    "ServerTimeoutError",
+    "SocketFactoryType",
+    "SocketTimeoutError",
+    "TCPConnector",
+    "TooManyRedirects",
+    "UnixConnector",
+    "NamedPipeConnector",
+    "WSServerHandshakeError",
+    "request",
+    # client_middleware
+    "ClientMiddlewareType",
+    "ClientHandlerType",
+    # cookiejar
+    "CookieJar",
+    "DummyCookieJar",
+    # formdata
+    "FormData",
+    # helpers
+    "BasicAuth",
+    "ChainMapProxy",
+    "DigestAuthMiddleware",
+    "ETag",
+    "set_zlib_backend",
+    # http
+    "HttpVersion",
+    "HttpVersion10",
+    "HttpVersion11",
+    "WSMsgType",
+    "WSCloseCode",
+    "WSMessage",
+    "WebSocketError",
+    # multipart
+    "BadContentDispositionHeader",
+    "BadContentDispositionParam",
+    "BodyPartReader",
+    "MultipartReader",
+    "MultipartWriter",
+    "content_disposition_filename",
+    "parse_content_disposition",
+    # payload
+    "AsyncIterablePayload",
+    "BufferedReaderPayload",
+    "BytesIOPayload",
+    "BytesPayload",
+    "IOBasePayload",
+    "JsonPayload",
+    "PAYLOAD_REGISTRY",
+    "Payload",
+    "StringIOPayload",
+    "StringPayload",
+    "TextIOPayload",
+    "get_payload",
+    "payload_type",
+    # payload_streamer
+    "streamer",
+    # resolver
+    "AsyncResolver",
+    "DefaultResolver",
+    "ThreadedResolver",
+    # streams
+    "DataQueue",
+    "EMPTY_PAYLOAD",
+    "EofStream",
+    "StreamReader",
+    # tracing
+    "TraceConfig",
+    "TraceConnectionCreateEndParams",
+    "TraceConnectionCreateStartParams",
+    "TraceConnectionQueuedEndParams",
+    "TraceConnectionQueuedStartParams",
+    "TraceConnectionReuseconnParams",
+    "TraceDnsCacheHitParams",
+    "TraceDnsCacheMissParams",
+    "TraceDnsResolveHostEndParams",
+    "TraceDnsResolveHostStartParams",
+    "TraceRequestChunkSentParams",
+    "TraceRequestEndParams",
+    "TraceRequestExceptionParams",
+    "TraceRequestHeadersSentParams",
+    "TraceRequestRedirectParams",
+    "TraceRequestStartParams",
+    "TraceResponseChunkReceivedParams",
+    # workers (imported lazily with __getattr__)
+    "GunicornUVLoopWebWorker",
+    "GunicornWebWorker",
+    "WSMessageTypeError",
+)
+
+
+def __dir__() -> Tuple[str, ...]:
+    return __all__ + ("__doc__",)
+
+
+def __getattr__(name: str) -> object:
+    global GunicornUVLoopWebWorker, GunicornWebWorker
+
+    # Importing gunicorn takes a long time (>100ms), so only import if actually needed.
+    if name in ("GunicornUVLoopWebWorker", "GunicornWebWorker"):
+        try:
+            from .worker import GunicornUVLoopWebWorker as guv, GunicornWebWorker as gw
+        except ImportError:
+            return None
+
+        GunicornUVLoopWebWorker = guv  # type: ignore[misc]
+        GunicornWebWorker = gw  # type: ignore[misc]
+        return guv if name == "GunicornUVLoopWebWorker" else gw
+
+    raise AttributeError(f"module {__name__} has no attribute {name}")

backend_service/venv/lib/python3.13/site-packages/aiohttp/_cookie_helpers.py

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+"""
+Internal cookie handling helpers.
+
+This module contains internal utilities for cookie parsing and manipulation.
+These are not part of the public API and may change without notice.
+"""
+
+import re
+from http.cookies import Morsel
+from typing import List, Optional, Sequence, Tuple, cast
+
+from .log import internal_logger
+
+__all__ = (
+    "parse_set_cookie_headers",
+    "parse_cookie_header",
+    "preserve_morsel_with_coded_value",
+)
+
+# Cookie parsing constants
+# Allow more characters in cookie names to handle real-world cookies
+# that don't strictly follow RFC standards (fixes #2683)
+# RFC 6265 defines cookie-name token as per RFC 2616 Section 2.2,
+# but many servers send cookies with characters like {} [] () etc.
+# This makes the cookie parser more tolerant of real-world cookies
+# while still providing some validation to catch obviously malformed names.
+_COOKIE_NAME_RE = re.compile(r"^[!#$%&\'()*+\-./0-9:<=>?@A-Z\[\]^_`a-z{|}~]+$")
+_COOKIE_KNOWN_ATTRS = frozenset(  # AKA Morsel._reserved
+    (
+        "path",
+        "domain",
+        "max-age",
+        "expires",
+        "secure",
+        "httponly",
+        "samesite",
+        "partitioned",
+        "version",
+        "comment",
+    )
+)
+_COOKIE_BOOL_ATTRS = frozenset(  # AKA Morsel._flags
+    ("secure", "httponly", "partitioned")
+)
+
+# SimpleCookie's pattern for parsing cookies with relaxed validation
+# Based on http.cookies pattern but extended to allow more characters in cookie names
+# to handle real-world cookies (fixes #2683)
+_COOKIE_PATTERN = re.compile(
+    r"""
+    \s*                            # Optional whitespace at start of cookie
+    (?P<key>                       # Start of group 'key'
+    # aiohttp has extended to include [] for compatibility with real-world cookies
+    [\w\d!#%&'~_`><@,:/\$\*\+\-\.\^\|\)\(\?\}\{\=\[\]]+?   # Any word of at least one letter
+    )                              # End of group 'key'
+    (                              # Optional group: there may not be a value.
+    \s*=\s*                          # Equal Sign
+    (?P<val>                         # Start of group 'val'
+    "(?:[^\\"]|\\.)*"                  # Any double-quoted string (properly closed)
+    |                                  # or
+    "[^";]*                            # Unmatched opening quote (differs from SimpleCookie - issue #7993)
+    |                                  # or
+    # Special case for "expires" attr - RFC 822, RFC 850, RFC 1036, RFC 1123
+    (\w{3,6}day|\w{3}),\s              # Day of the week or abbreviated day (with comma)
+    [\w\d\s-]{9,11}\s[\d:]{8}\s        # Date and time in specific format
+    (GMT|[+-]\d{4})                     # Timezone: GMT or RFC 2822 offset like -0000, +0100
+                                        # NOTE: RFC 2822 timezone support is an aiohttp extension
+                                        # for issue #4493 - SimpleCookie does NOT support this
+    |                                  # or
+    # ANSI C asctime() format: "Wed Jun  9 10:18:14 2021"
+    # NOTE: This is an aiohttp extension for issue #4327 - SimpleCookie does NOT support this format
+    \w{3}\s+\w{3}\s+[\s\d]\d\s+\d{2}:\d{2}:\d{2}\s+\d{4}
+    |                                  # or
+    [\w\d!#%&'~_`><@,:/\$\*\+\-\.\^\|\)\(\?\}\{\=\[\]]*      # Any word or empty string
+    )                                # End of group 'val'
+    )?                             # End of optional value group
+    \s*                            # Any number of spaces.
+    (\s+|;|$)                      # Ending either at space, semicolon, or EOS.
+    """,
+    re.VERBOSE | re.ASCII,
+)
+
+
+def preserve_morsel_with_coded_value(cookie: Morsel[str]) -> Morsel[str]:
+    """
+    Preserve a Morsel's coded_value exactly as received from the server.
+
+    This function ensures that cookie encoding is preserved exactly as sent by
+    the server, which is critical for compatibility with old servers that have
+    strict requirements about cookie formats.
+
+    This addresses the issue described in https://github.com/aio-libs/aiohttp/pull/1453
+    where Python's SimpleCookie would re-encode cookies, breaking authentication
+    with certain servers.
+
+    Args:
+        cookie: A Morsel object from SimpleCookie
+
+    Returns:
+        A Morsel object with preserved coded_value
+
+    """
+    mrsl_val = cast("Morsel[str]", cookie.get(cookie.key, Morsel()))
+    # We use __setstate__ instead of the public set() API because it allows us to
+    # bypass validation and set already validated state. This is more stable than
+    # setting protected attributes directly and unlikely to change since it would
+    # break pickling.
+    mrsl_val.__setstate__(  # type: ignore[attr-defined]
+        {"key": cookie.key, "value": cookie.value, "coded_value": cookie.coded_value}
+    )
+    return mrsl_val
+
+
+_unquote_sub = re.compile(r"\\(?:([0-3][0-7][0-7])|(.))").sub
+
+
+def _unquote_replace(m: re.Match[str]) -> str:
+    """
+    Replace function for _unquote_sub regex substitution.
+
+    Handles escaped characters in cookie values:
+    - Octal sequences are converted to their character representation
+    - Other escaped characters are unescaped by removing the backslash
+    """
+    if m[1]:
+        return chr(int(m[1], 8))
+    return m[2]
+
+
+def _unquote(value: str) -> str:
+    """
+    Unquote a cookie value.
+
+    Vendored from http.cookies._unquote to ensure compatibility.
+
+    Note: The original implementation checked for None, but we've removed
+    that check since all callers already ensure the value is not None.
+    """
+    # If there aren't any doublequotes,
+    # then there can't be any special characters.  See RFC 2109.
+    if len(value) < 2:
+        return value
+    if value[0] != '"' or value[-1] != '"':
+        return value
+
+    # We have to assume that we must decode this string.
+    # Down to work.
+
+    # Remove the "s
+    value = value[1:-1]
+
+    # Check for special sequences.  Examples:
+    #    \012 --> \n
+    #    \"   --> "
+    #
+    return _unquote_sub(_unquote_replace, value)
+
+
+def parse_cookie_header(header: str) -> List[Tuple[str, Morsel[str]]]:
+    """
+    Parse a Cookie header according to RFC 6265 Section 5.4.
+
+    Cookie headers contain only name-value pairs separated by semicolons.
+    There are no attributes in Cookie headers - even names that match
+    attribute names (like 'path' or 'secure') should be treated as cookies.
+
+    This parser uses the same regex-based approach as parse_set_cookie_headers
+    to properly handle quoted values that may contain semicolons. When the
+    regex fails to match a malformed cookie, it falls back to simple parsing
+    to ensure subsequent cookies are not lost
+    https://github.com/aio-libs/aiohttp/issues/11632
+
+    Args:
+        header: The Cookie header value to parse
+
+    Returns:
+        List of (name, Morsel) tuples for compatibility with SimpleCookie.update()
+    """
+    if not header:
+        return []
+
+    cookies: List[Tuple[str, Morsel[str]]] = []
+    morsel: Morsel[str]
+    i = 0
+    n = len(header)
+
+    while i < n:
+        # Use the same pattern as parse_set_cookie_headers to find cookies
+        match = _COOKIE_PATTERN.match(header, i)
+        if not match:
+            # Fallback for malformed cookies https://github.com/aio-libs/aiohttp/issues/11632
+            # Find next semicolon to skip or attempt simple key=value parsing
+            next_semi = header.find(";", i)
+            eq_pos = header.find("=", i)
+
+            # Try to extract key=value if '=' comes before ';'
+            if eq_pos != -1 and (next_semi == -1 or eq_pos < next_semi):
+                end_pos = next_semi if next_semi != -1 else n
+                key = header[i:eq_pos].strip()
+                value = header[eq_pos + 1 : end_pos].strip()
+
+                # Validate the name (same as regex path)
+                if not _COOKIE_NAME_RE.match(key):
+                    internal_logger.warning(
+                        "Can not load cookie: Illegal cookie name %r", key
+                    )
+                else:
+                    morsel = Morsel()
+                    morsel.__setstate__(  # type: ignore[attr-defined]
+                        {"key": key, "value": _unquote(value), "coded_value": value}
+                    )
+                    cookies.append((key, morsel))
+
+            # Move to next cookie or end
+            i = next_semi + 1 if next_semi != -1 else n
+            continue
+
+        key = match.group("key")
+        value = match.group("val") or ""
+        i = match.end(0)
+
+        # Validate the name
+        if not key or not _COOKIE_NAME_RE.match(key):
+            internal_logger.warning("Can not load cookie: Illegal cookie name %r", key)
+            continue
+
+        # Create new morsel
+        morsel = Morsel()
+        # Preserve the original value as coded_value (with quotes if present)
+        # We use __setstate__ instead of the public set() API because it allows us to
+        # bypass validation and set already validated state. This is more stable than
+        # setting protected attributes directly and unlikely to change since it would
+        # break pickling.
+        morsel.__setstate__(  # type: ignore[attr-defined]
+            {"key": key, "value": _unquote(value), "coded_value": value}
+        )
+
+        cookies.append((key, morsel))
+
+    return cookies
+
+
+def parse_set_cookie_headers(headers: Sequence[str]) -> List[Tuple[str, Morsel[str]]]:
+    """
+    Parse cookie headers using a vendored version of SimpleCookie parsing.
+
+    This implementation is based on SimpleCookie.__parse_string to ensure
+    compatibility with how SimpleCookie parses cookies, including handling
+    of malformed cookies with missing semicolons.
+
+    This function is used for both Cookie and Set-Cookie headers in order to be
+    forgiving. Ideally we would have followed RFC 6265 Section 5.2 (for Cookie
+    headers) and RFC 6265 Section 4.2.1 (for Set-Cookie headers), but the
+    real world data makes it impossible since we need to be a bit more forgiving.
+
+    NOTE: This implementation differs from SimpleCookie in handling unmatched quotes.
+    SimpleCookie will stop parsing when it encounters a cookie value with an unmatched
+    quote (e.g., 'cookie="value'), causing subsequent cookies to be silently dropped.
+    This implementation handles unmatched quotes more gracefully to prevent cookie loss.
+    See https://github.com/aio-libs/aiohttp/issues/7993
+    """
+    parsed_cookies: List[Tuple[str, Morsel[str]]] = []
+
+    for header in headers:
+        if not header:
+            continue
+
+        # Parse cookie string using SimpleCookie's algorithm
+        i = 0
+        n = len(header)
+        current_morsel: Optional[Morsel[str]] = None
+        morsel_seen = False
+
+        while 0 <= i < n:
+            # Start looking for a cookie
+            match = _COOKIE_PATTERN.match(header, i)
+            if not match:
+                # No more cookies
+                break
+
+            key, value = match.group("key"), match.group("val")
+            i = match.end(0)
+            lower_key = key.lower()
+
+            if key[0] == "$":
+                if not morsel_seen:
+                    # We ignore attributes which pertain to the cookie
+                    # mechanism as a whole, such as "$Version".
+                    continue
+                # Process as attribute
+                if current_morsel is not None:
+                    attr_lower_key = lower_key[1:]
+                    if attr_lower_key in _COOKIE_KNOWN_ATTRS:
+                        current_morsel[attr_lower_key] = value or ""
+            elif lower_key in _COOKIE_KNOWN_ATTRS:
+                if not morsel_seen:
+                    # Invalid cookie string - attribute before cookie
+                    break
+                if lower_key in _COOKIE_BOOL_ATTRS:
+                    # Boolean attribute with any value should be True
+                    if current_morsel is not None and current_morsel.isReservedKey(key):
+                        current_morsel[lower_key] = True
+                elif value is None:
+                    # Invalid cookie string - non-boolean attribute without value
+                    break
+                elif current_morsel is not None:
+                    # Regular attribute with value
+                    current_morsel[lower_key] = _unquote(value)
+            elif value is not None:
+                # This is a cookie name=value pair
+                # Validate the name
+                if key in _COOKIE_KNOWN_ATTRS or not _COOKIE_NAME_RE.match(key):
+                    internal_logger.warning(
+                        "Can not load cookies: Illegal cookie name %r", key
+                    )
+                    current_morsel = None
+                else:
+                    # Create new morsel
+                    current_morsel = Morsel()
+                    # Preserve the original value as coded_value (with quotes if present)
+                    # We use __setstate__ instead of the public set() API because it allows us to
+                    # bypass validation and set already validated state. This is more stable than
+                    # setting protected attributes directly and unlikely to change since it would
+                    # break pickling.
+                    current_morsel.__setstate__(  # type: ignore[attr-defined]
+                        {"key": key, "value": _unquote(value), "coded_value": value}
+                    )
+                    parsed_cookies.append((key, current_morsel))
+                    morsel_seen = True
+            else:
+                # Invalid cookie string - no value for non-attribute
+                break
+
+    return parsed_cookies

backend_service/venv/lib/python3.13/site-packages/aiohttp/_cparser.pxd

@@ -0,0 +1,158 @@
+from libc.stdint cimport int32_t, uint8_t, uint16_t, uint64_t
+
+
+cdef extern from "llhttp.h":
+
+    struct llhttp__internal_s:
+        int32_t _index
+        void* _span_pos0
+        void* _span_cb0
+        int32_t error
+        const char* reason
+        const char* error_pos
+        void* data
+        void* _current
+        uint64_t content_length
+        uint8_t type
+        uint8_t method
+        uint8_t http_major
+        uint8_t http_minor
+        uint8_t header_state
+        uint8_t lenient_flags
+        uint8_t upgrade
+        uint8_t finish
+        uint16_t flags
+        uint16_t status_code
+        void* settings
+
+    ctypedef llhttp__internal_s llhttp__internal_t
+    ctypedef llhttp__internal_t llhttp_t
+
+    ctypedef int (*llhttp_data_cb)(llhttp_t*, const char *at, size_t length) except -1
+    ctypedef int (*llhttp_cb)(llhttp_t*) except -1
+
+    struct llhttp_settings_s:
+        llhttp_cb      on_message_begin
+        llhttp_data_cb on_url
+        llhttp_data_cb on_status
+        llhttp_data_cb on_header_field
+        llhttp_data_cb on_header_value
+        llhttp_cb      on_headers_complete
+        llhttp_data_cb on_body
+        llhttp_cb      on_message_complete
+        llhttp_cb      on_chunk_header
+        llhttp_cb      on_chunk_complete
+
+        llhttp_cb      on_url_complete
+        llhttp_cb      on_status_complete
+        llhttp_cb      on_header_field_complete
+        llhttp_cb      on_header_value_complete
+
+    ctypedef llhttp_settings_s llhttp_settings_t
+
+    enum llhttp_errno:
+        HPE_OK,
+        HPE_INTERNAL,
+        HPE_STRICT,
+        HPE_LF_EXPECTED,
+        HPE_UNEXPECTED_CONTENT_LENGTH,
+        HPE_CLOSED_CONNECTION,
+        HPE_INVALID_METHOD,
+        HPE_INVALID_URL,
+        HPE_INVALID_CONSTANT,
+        HPE_INVALID_VERSION,
+        HPE_INVALID_HEADER_TOKEN,
+        HPE_INVALID_CONTENT_LENGTH,
+        HPE_INVALID_CHUNK_SIZE,
+        HPE_INVALID_STATUS,
+        HPE_INVALID_EOF_STATE,
+        HPE_INVALID_TRANSFER_ENCODING,
+        HPE_CB_MESSAGE_BEGIN,
+        HPE_CB_HEADERS_COMPLETE,
+        HPE_CB_MESSAGE_COMPLETE,
+        HPE_CB_CHUNK_HEADER,
+        HPE_CB_CHUNK_COMPLETE,
+        HPE_PAUSED,
+        HPE_PAUSED_UPGRADE,
+        HPE_USER
+
+    ctypedef llhttp_errno llhttp_errno_t
+
+    enum llhttp_flags:
+        F_CHUNKED,
+        F_CONTENT_LENGTH
+
+    enum llhttp_type:
+        HTTP_REQUEST,
+        HTTP_RESPONSE,
+        HTTP_BOTH
+
+    enum llhttp_method:
+        HTTP_DELETE,
+        HTTP_GET,
+        HTTP_HEAD,
+        HTTP_POST,
+        HTTP_PUT,
+        HTTP_CONNECT,
+        HTTP_OPTIONS,
+        HTTP_TRACE,
+        HTTP_COPY,
+        HTTP_LOCK,
+        HTTP_MKCOL,
+        HTTP_MOVE,
+        HTTP_PROPFIND,
+        HTTP_PROPPATCH,
+        HTTP_SEARCH,
+        HTTP_UNLOCK,
+        HTTP_BIND,
+        HTTP_REBIND,
+        HTTP_UNBIND,
+        HTTP_ACL,
+        HTTP_REPORT,
+        HTTP_MKACTIVITY,
+        HTTP_CHECKOUT,
+        HTTP_MERGE,
+        HTTP_MSEARCH,
+        HTTP_NOTIFY,
+        HTTP_SUBSCRIBE,
+        HTTP_UNSUBSCRIBE,
+        HTTP_PATCH,
+        HTTP_PURGE,
+        HTTP_MKCALENDAR,
+        HTTP_LINK,
+        HTTP_UNLINK,
+        HTTP_SOURCE,
+        HTTP_PRI,
+        HTTP_DESCRIBE,
+        HTTP_ANNOUNCE,
+        HTTP_SETUP,
+        HTTP_PLAY,
+        HTTP_PAUSE,
+        HTTP_TEARDOWN,
+        HTTP_GET_PARAMETER,
+        HTTP_SET_PARAMETER,
+        HTTP_REDIRECT,
+        HTTP_RECORD,
+        HTTP_FLUSH
+
+    ctypedef llhttp_method llhttp_method_t;
+
+    void llhttp_settings_init(llhttp_settings_t* settings)
+    void llhttp_init(llhttp_t* parser, llhttp_type type,
+                 const llhttp_settings_t* settings)
+
+    llhttp_errno_t llhttp_execute(llhttp_t* parser, const char* data, size_t len)
+
+    int llhttp_should_keep_alive(const llhttp_t* parser)
+
+    void llhttp_resume_after_upgrade(llhttp_t* parser)
+
+    llhttp_errno_t llhttp_get_errno(const llhttp_t* parser)
+    const char* llhttp_get_error_reason(const llhttp_t* parser)
+    const char* llhttp_get_error_pos(const llhttp_t* parser)
+
+    const char* llhttp_method_name(llhttp_method_t method)
+
+    void llhttp_set_lenient_headers(llhttp_t* parser, int enabled)
+    void llhttp_set_lenient_optional_cr_before_lf(llhttp_t* parser, int enabled)
+    void llhttp_set_lenient_spaces_after_chunk_size(llhttp_t* parser, int enabled)

backend_service/venv/lib/python3.13/site-packages/aiohttp/_find_header.pxd

@@ -0,0 +1,2 @@
+cdef extern from "_find_header.h":
+    int find_header(char *, int)

backend_service/venv/lib/python3.13/site-packages/aiohttp/_headers.pxi

@@ -0,0 +1,83 @@
+# The file is autogenerated from aiohttp/hdrs.py
+# Run ./tools/gen.py to update it after the origin changing.
+
+from . import hdrs
+cdef tuple headers = (
+    hdrs.ACCEPT,
+    hdrs.ACCEPT_CHARSET,
+    hdrs.ACCEPT_ENCODING,
+    hdrs.ACCEPT_LANGUAGE,
+    hdrs.ACCEPT_RANGES,
+    hdrs.ACCESS_CONTROL_ALLOW_CREDENTIALS,
+    hdrs.ACCESS_CONTROL_ALLOW_HEADERS,
+    hdrs.ACCESS_CONTROL_ALLOW_METHODS,
+    hdrs.ACCESS_CONTROL_ALLOW_ORIGIN,
+    hdrs.ACCESS_CONTROL_EXPOSE_HEADERS,
+    hdrs.ACCESS_CONTROL_MAX_AGE,
+    hdrs.ACCESS_CONTROL_REQUEST_HEADERS,
+    hdrs.ACCESS_CONTROL_REQUEST_METHOD,
+    hdrs.AGE,
+    hdrs.ALLOW,
+    hdrs.AUTHORIZATION,
+    hdrs.CACHE_CONTROL,
+    hdrs.CONNECTION,
+    hdrs.CONTENT_DISPOSITION,
+    hdrs.CONTENT_ENCODING,
+    hdrs.CONTENT_LANGUAGE,
+    hdrs.CONTENT_LENGTH,
+    hdrs.CONTENT_LOCATION,
+    hdrs.CONTENT_MD5,
+    hdrs.CONTENT_RANGE,
+    hdrs.CONTENT_TRANSFER_ENCODING,
+    hdrs.CONTENT_TYPE,
+    hdrs.COOKIE,
+    hdrs.DATE,
+    hdrs.DESTINATION,
+    hdrs.DIGEST,
+    hdrs.ETAG,
+    hdrs.EXPECT,
+    hdrs.EXPIRES,
+    hdrs.FORWARDED,
+    hdrs.FROM,
+    hdrs.HOST,
+    hdrs.IF_MATCH,
+    hdrs.IF_MODIFIED_SINCE,
+    hdrs.IF_NONE_MATCH,
+    hdrs.IF_RANGE,
+    hdrs.IF_UNMODIFIED_SINCE,
+    hdrs.KEEP_ALIVE,
+    hdrs.LAST_EVENT_ID,
+    hdrs.LAST_MODIFIED,
+    hdrs.LINK,
+    hdrs.LOCATION,
+    hdrs.MAX_FORWARDS,
+    hdrs.ORIGIN,
+    hdrs.PRAGMA,
+    hdrs.PROXY_AUTHENTICATE,
+    hdrs.PROXY_AUTHORIZATION,
+    hdrs.RANGE,
+    hdrs.REFERER,
+    hdrs.RETRY_AFTER,
+    hdrs.SEC_WEBSOCKET_ACCEPT,
+    hdrs.SEC_WEBSOCKET_EXTENSIONS,
+    hdrs.SEC_WEBSOCKET_KEY,
+    hdrs.SEC_WEBSOCKET_KEY1,
+    hdrs.SEC_WEBSOCKET_PROTOCOL,
+    hdrs.SEC_WEBSOCKET_VERSION,
+    hdrs.SERVER,
+    hdrs.SET_COOKIE,
+    hdrs.TE,
+    hdrs.TRAILER,
+    hdrs.TRANSFER_ENCODING,
+    hdrs.URI,
+    hdrs.UPGRADE,
+    hdrs.USER_AGENT,
+    hdrs.VARY,
+    hdrs.VIA,
+    hdrs.WWW_AUTHENTICATE,
+    hdrs.WANT_DIGEST,
+    hdrs.WARNING,
+    hdrs.X_FORWARDED_FOR,
+    hdrs.X_FORWARDED_HOST,
+    hdrs.X_FORWARDED_PROTO,
+)

backend_service/venv/lib/python3.13/site-packages/aiohttp/_http_parser.pyx

@@ -0,0 +1,835 @@
+# Based on https://github.com/MagicStack/httptools
+#
+
+from cpython cimport (
+    Py_buffer,
+    PyBUF_SIMPLE,
+    PyBuffer_Release,
+    PyBytes_AsString,
+    PyBytes_AsStringAndSize,
+    PyObject_GetBuffer,
+)
+from cpython.mem cimport PyMem_Free, PyMem_Malloc
+from libc.limits cimport ULLONG_MAX
+from libc.string cimport memcpy
+
+from multidict import CIMultiDict as _CIMultiDict, CIMultiDictProxy as _CIMultiDictProxy
+from yarl import URL as _URL
+
+from aiohttp import hdrs
+from aiohttp.helpers import DEBUG, set_exception
+
+from .http_exceptions import (
+    BadHttpMessage,
+    BadHttpMethod,
+    BadStatusLine,
+    ContentLengthError,
+    InvalidHeader,
+    InvalidURLError,
+    LineTooLong,
+    PayloadEncodingError,
+    TransferEncodingError,
+)
+from .http_parser import DeflateBuffer as _DeflateBuffer
+from .http_writer import (
+    HttpVersion as _HttpVersion,
+    HttpVersion10 as _HttpVersion10,
+    HttpVersion11 as _HttpVersion11,
+)
+from .streams import EMPTY_PAYLOAD as _EMPTY_PAYLOAD, StreamReader as _StreamReader
+
+cimport cython
+
+from aiohttp cimport _cparser as cparser
+
+include "_headers.pxi"
+
+from aiohttp cimport _find_header
+
+ALLOWED_UPGRADES = frozenset({"websocket"})
+DEF DEFAULT_FREELIST_SIZE = 250
+
+cdef extern from "Python.h":
+    int PyByteArray_Resize(object, Py_ssize_t) except -1
+    Py_ssize_t PyByteArray_Size(object) except -1
+    char* PyByteArray_AsString(object)
+
+__all__ = ('HttpRequestParser', 'HttpResponseParser',
+           'RawRequestMessage', 'RawResponseMessage')
+
+cdef object URL = _URL
+cdef object URL_build = URL.build
+cdef object CIMultiDict = _CIMultiDict
+cdef object CIMultiDictProxy = _CIMultiDictProxy
+cdef object HttpVersion = _HttpVersion
+cdef object HttpVersion10 = _HttpVersion10
+cdef object HttpVersion11 = _HttpVersion11
+cdef object SEC_WEBSOCKET_KEY1 = hdrs.SEC_WEBSOCKET_KEY1
+cdef object CONTENT_ENCODING = hdrs.CONTENT_ENCODING
+cdef object EMPTY_PAYLOAD = _EMPTY_PAYLOAD
+cdef object StreamReader = _StreamReader
+cdef object DeflateBuffer = _DeflateBuffer
+cdef bytes EMPTY_BYTES = b""
+
+cdef inline object extend(object buf, const char* at, size_t length):
+    cdef Py_ssize_t s
+    cdef char* ptr
+    s = PyByteArray_Size(buf)
+    PyByteArray_Resize(buf, s + length)
+    ptr = PyByteArray_AsString(buf)
+    memcpy(ptr + s, at, length)
+
+
+DEF METHODS_COUNT = 46;
+
+cdef list _http_method = []
+
+for i in range(METHODS_COUNT):
+    _http_method.append(
+        cparser.llhttp_method_name(<cparser.llhttp_method_t> i).decode('ascii'))
+
+
+cdef inline str http_method_str(int i):
+    if i < METHODS_COUNT:
+        return <str>_http_method[i]
+    else:
+        return "<unknown>"
+
+cdef inline object find_header(bytes raw_header):
+    cdef Py_ssize_t size
+    cdef char *buf
+    cdef int idx
+    PyBytes_AsStringAndSize(raw_header, &buf, &size)
+    idx = _find_header.find_header(buf, size)
+    if idx == -1:
+        return raw_header.decode('utf-8', 'surrogateescape')
+    return headers[idx]
+
+
+@cython.freelist(DEFAULT_FREELIST_SIZE)
+cdef class RawRequestMessage:
+    cdef readonly str method
+    cdef readonly str path
+    cdef readonly object version  # HttpVersion
+    cdef readonly object headers  # CIMultiDict
+    cdef readonly object raw_headers  # tuple
+    cdef readonly object should_close
+    cdef readonly object compression
+    cdef readonly object upgrade
+    cdef readonly object chunked
+    cdef readonly object url  # yarl.URL
+
+    def __init__(self, method, path, version, headers, raw_headers,
+                 should_close, compression, upgrade, chunked, url):
+        self.method = method
+        self.path = path
+        self.version = version
+        self.headers = headers
+        self.raw_headers = raw_headers
+        self.should_close = should_close
+        self.compression = compression
+        self.upgrade = upgrade
+        self.chunked = chunked
+        self.url = url
+
+    def __repr__(self):
+        info = []
+        info.append(("method", self.method))
+        info.append(("path", self.path))
+        info.append(("version", self.version))
+        info.append(("headers", self.headers))
+        info.append(("raw_headers", self.raw_headers))
+        info.append(("should_close", self.should_close))
+        info.append(("compression", self.compression))
+        info.append(("upgrade", self.upgrade))
+        info.append(("chunked", self.chunked))
+        info.append(("url", self.url))
+        sinfo = ', '.join(name + '=' + repr(val) for name, val in info)
+        return '<RawRequestMessage(' + sinfo + ')>'
+
+    def _replace(self, **dct):
+        cdef RawRequestMessage ret
+        ret = _new_request_message(self.method,
+                                   self.path,
+                                   self.version,
+                                   self.headers,
+                                   self.raw_headers,
+                                   self.should_close,
+                                   self.compression,
+                                   self.upgrade,
+                                   self.chunked,
+                                   self.url)
+        if "method" in dct:
+            ret.method = dct["method"]
+        if "path" in dct:
+            ret.path = dct["path"]
+        if "version" in dct:
+            ret.version = dct["version"]
+        if "headers" in dct:
+            ret.headers = dct["headers"]
+        if "raw_headers" in dct:
+            ret.raw_headers = dct["raw_headers"]
+        if "should_close" in dct:
+            ret.should_close = dct["should_close"]
+        if "compression" in dct:
+            ret.compression = dct["compression"]
+        if "upgrade" in dct:
+            ret.upgrade = dct["upgrade"]
+        if "chunked" in dct:
+            ret.chunked = dct["chunked"]
+        if "url" in dct:
+            ret.url = dct["url"]
+        return ret
+
+cdef _new_request_message(str method,
+                           str path,
+                           object version,
+                           object headers,
+                           object raw_headers,
+                           bint should_close,
+                           object compression,
+                           bint upgrade,
+                           bint chunked,
+                           object url):
+    cdef RawRequestMessage ret
+    ret = RawRequestMessage.__new__(RawRequestMessage)
+    ret.method = method
+    ret.path = path
+    ret.version = version
+    ret.headers = headers
+    ret.raw_headers = raw_headers
+    ret.should_close = should_close
+    ret.compression = compression
+    ret.upgrade = upgrade
+    ret.chunked = chunked
+    ret.url = url
+    return ret
+
+
+@cython.freelist(DEFAULT_FREELIST_SIZE)
+cdef class RawResponseMessage:
+    cdef readonly object version  # HttpVersion
+    cdef readonly int code
+    cdef readonly str reason
+    cdef readonly object headers  # CIMultiDict
+    cdef readonly object raw_headers  # tuple
+    cdef readonly object should_close
+    cdef readonly object compression
+    cdef readonly object upgrade
+    cdef readonly object chunked
+
+    def __init__(self, version, code, reason, headers, raw_headers,
+                 should_close, compression, upgrade, chunked):
+        self.version = version
+        self.code = code
+        self.reason = reason
+        self.headers = headers
+        self.raw_headers = raw_headers
+        self.should_close = should_close
+        self.compression = compression
+        self.upgrade = upgrade
+        self.chunked = chunked
+
+    def __repr__(self):
+        info = []
+        info.append(("version", self.version))
+        info.append(("code", self.code))
+        info.append(("reason", self.reason))
+        info.append(("headers", self.headers))
+        info.append(("raw_headers", self.raw_headers))
+        info.append(("should_close", self.should_close))
+        info.append(("compression", self.compression))
+        info.append(("upgrade", self.upgrade))
+        info.append(("chunked", self.chunked))
+        sinfo = ', '.join(name + '=' + repr(val) for name, val in info)
+        return '<RawResponseMessage(' + sinfo + ')>'
+
+
+cdef _new_response_message(object version,
+                           int code,
+                           str reason,
+                           object headers,
+                           object raw_headers,
+                           bint should_close,
+                           object compression,
+                           bint upgrade,
+                           bint chunked):
+    cdef RawResponseMessage ret
+    ret = RawResponseMessage.__new__(RawResponseMessage)
+    ret.version = version
+    ret.code = code
+    ret.reason = reason
+    ret.headers = headers
+    ret.raw_headers = raw_headers
+    ret.should_close = should_close
+    ret.compression = compression
+    ret.upgrade = upgrade
+    ret.chunked = chunked
+    return ret
+
+
+@cython.internal
+cdef class HttpParser:
+
+    cdef:
+        cparser.llhttp_t* _cparser
+        cparser.llhttp_settings_t* _csettings
+
+        bytes _raw_name
+        object _name
+        bytes _raw_value
+        bint      _has_value
+
+        object _protocol
+        object _loop
+        object _timer
+
+        size_t _max_line_size
+        size_t _max_field_size
+        size_t _max_headers
+        bint _response_with_body
+        bint _read_until_eof
+
+        bint    _started
+        object  _url
+        bytearray   _buf
+        str     _path
+        str     _reason
+        list    _headers
+        list    _raw_headers
+        bint    _upgraded
+        list    _messages
+        object  _payload
+        bint    _payload_error
+        object  _payload_exception
+        object  _last_error
+        bint    _auto_decompress
+        int     _limit
+
+        str     _content_encoding
+
+        Py_buffer py_buf
+
+    def __cinit__(self):
+        self._cparser = <cparser.llhttp_t*> \
+                                PyMem_Malloc(sizeof(cparser.llhttp_t))
+        if self._cparser is NULL:
+            raise MemoryError()
+
+        self._csettings = <cparser.llhttp_settings_t*> \
+                                PyMem_Malloc(sizeof(cparser.llhttp_settings_t))
+        if self._csettings is NULL:
+            raise MemoryError()
+
+    def __dealloc__(self):
+        PyMem_Free(self._cparser)
+        PyMem_Free(self._csettings)
+
+    cdef _init(
+        self, cparser.llhttp_type mode,
+        object protocol, object loop, int limit,
+        object timer=None,
+        size_t max_line_size=8190, size_t max_headers=32768,
+        size_t max_field_size=8190, payload_exception=None,
+        bint response_with_body=True, bint read_until_eof=False,
+        bint auto_decompress=True,
+    ):
+        cparser.llhttp_settings_init(self._csettings)
+        cparser.llhttp_init(self._cparser, mode, self._csettings)
+        self._cparser.data = <void*>self
+        self._cparser.content_length = 0
+
+        self._protocol = protocol
+        self._loop = loop
+        self._timer = timer
+
+        self._buf = bytearray()
+        self._payload = None
+        self._payload_error = 0
+        self._payload_exception = payload_exception
+        self._messages = []
+
+        self._raw_name = EMPTY_BYTES
+        self._raw_value = EMPTY_BYTES
+        self._has_value = False
+
+        self._max_line_size = max_line_size
+        self._max_headers = max_headers
+        self._max_field_size = max_field_size
+        self._response_with_body = response_with_body
+        self._read_until_eof = read_until_eof
+        self._upgraded = False
+        self._auto_decompress = auto_decompress
+        self._content_encoding = None
+
+        self._csettings.on_url = cb_on_url
+        self._csettings.on_status = cb_on_status
+        self._csettings.on_header_field = cb_on_header_field
+        self._csettings.on_header_value = cb_on_header_value
+        self._csettings.on_headers_complete = cb_on_headers_complete
+        self._csettings.on_body = cb_on_body
+        self._csettings.on_message_begin = cb_on_message_begin
+        self._csettings.on_message_complete = cb_on_message_complete
+        self._csettings.on_chunk_header = cb_on_chunk_header
+        self._csettings.on_chunk_complete = cb_on_chunk_complete
+
+        self._last_error = None
+        self._limit = limit
+
+    cdef _process_header(self):
+        cdef str value
+        if self._raw_name is not EMPTY_BYTES:
+            name = find_header(self._raw_name)
+            value = self._raw_value.decode('utf-8', 'surrogateescape')
+
+            self._headers.append((name, value))
+
+            if name is CONTENT_ENCODING:
+                self._content_encoding = value
+
+            self._has_value = False
+            self._raw_headers.append((self._raw_name, self._raw_value))
+            self._raw_name = EMPTY_BYTES
+            self._raw_value = EMPTY_BYTES
+
+    cdef _on_header_field(self, char* at, size_t length):
+        if self._has_value:
+            self._process_header()
+
+        if self._raw_name is EMPTY_BYTES:
+            self._raw_name = at[:length]
+        else:
+            self._raw_name += at[:length]
+
+    cdef _on_header_value(self, char* at, size_t length):
+        if self._raw_value is EMPTY_BYTES:
+            self._raw_value = at[:length]
+        else:
+            self._raw_value += at[:length]
+        self._has_value = True
+
+    cdef _on_headers_complete(self):
+        self._process_header()
+
+        should_close = not cparser.llhttp_should_keep_alive(self._cparser)
+        upgrade = self._cparser.upgrade
+        chunked = self._cparser.flags & cparser.F_CHUNKED
+
+        raw_headers = tuple(self._raw_headers)
+        headers = CIMultiDictProxy(CIMultiDict(self._headers))
+
+        if self._cparser.type == cparser.HTTP_REQUEST:
+            allowed = upgrade and headers.get("upgrade", "").lower() in ALLOWED_UPGRADES
+            if allowed or self._cparser.method == cparser.HTTP_CONNECT:
+                self._upgraded = True
+        else:
+            if upgrade and self._cparser.status_code == 101:
+                self._upgraded = True
+
+        # do not support old websocket spec
+        if SEC_WEBSOCKET_KEY1 in headers:
+            raise InvalidHeader(SEC_WEBSOCKET_KEY1)
+
+        encoding = None
+        enc = self._content_encoding
+        if enc is not None:
+            self._content_encoding = None
+            enc = enc.lower()
+            if enc in ('gzip', 'deflate', 'br', 'zstd'):
+                encoding = enc
+
+        if self._cparser.type == cparser.HTTP_REQUEST:
+            method = http_method_str(self._cparser.method)
+            msg = _new_request_message(
+                method, self._path,
+                self.http_version(), headers, raw_headers,
+                should_close, encoding, upgrade, chunked, self._url)
+        else:
+            msg = _new_response_message(
+                self.http_version(), self._cparser.status_code, self._reason,
+                headers, raw_headers, should_close, encoding,
+                upgrade, chunked)
+
+        if (
+            ULLONG_MAX > self._cparser.content_length > 0 or chunked or
+            self._cparser.method == cparser.HTTP_CONNECT or
+            (self._cparser.status_code >= 199 and
+             self._cparser.content_length == 0 and
+             self._read_until_eof)
+        ):
+            payload = StreamReader(
+                self._protocol, timer=self._timer, loop=self._loop,
+                limit=self._limit)
+        else:
+            payload = EMPTY_PAYLOAD
+
+        self._payload = payload
+        if encoding is not None and self._auto_decompress:
+            self._payload = DeflateBuffer(payload, encoding)
+
+        if not self._response_with_body:
+            payload = EMPTY_PAYLOAD
+
+        self._messages.append((msg, payload))
+
+    cdef _on_message_complete(self):
+        self._payload.feed_eof()
+        self._payload = None
+
+    cdef _on_chunk_header(self):
+        self._payload.begin_http_chunk_receiving()
+
+    cdef _on_chunk_complete(self):
+        self._payload.end_http_chunk_receiving()
+
+    cdef object _on_status_complete(self):
+        pass
+
+    cdef inline http_version(self):
+        cdef cparser.llhttp_t* parser = self._cparser
+
+        if parser.http_major == 1:
+            if parser.http_minor == 0:
+                return HttpVersion10
+            elif parser.http_minor == 1:
+                return HttpVersion11
+
+        return HttpVersion(parser.http_major, parser.http_minor)
+
+    ### Public API ###
+
+    def feed_eof(self):
+        cdef bytes desc
+
+        if self._payload is not None:
+            if self._cparser.flags & cparser.F_CHUNKED:
+                raise TransferEncodingError(
+                    "Not enough data to satisfy transfer length header.")
+            elif self._cparser.flags & cparser.F_CONTENT_LENGTH:
+                raise ContentLengthError(
+                    "Not enough data to satisfy content length header.")
+            elif cparser.llhttp_get_errno(self._cparser) != cparser.HPE_OK:
+                desc = cparser.llhttp_get_error_reason(self._cparser)
+                raise PayloadEncodingError(desc.decode('latin-1'))
+            else:
+                self._payload.feed_eof()
+        elif self._started:
+            self._on_headers_complete()
+            if self._messages:
+                return self._messages[-1][0]
+
+    def feed_data(self, data):
+        cdef:
+            size_t data_len
+            size_t nb
+            cdef cparser.llhttp_errno_t errno
+
+        PyObject_GetBuffer(data, &self.py_buf, PyBUF_SIMPLE)
+        data_len = <size_t>self.py_buf.len
+
+        errno = cparser.llhttp_execute(
+            self._cparser,
+            <char*>self.py_buf.buf,
+            data_len)
+
+        if errno is cparser.HPE_PAUSED_UPGRADE:
+            cparser.llhttp_resume_after_upgrade(self._cparser)
+
+            nb = cparser.llhttp_get_error_pos(self._cparser) - <char*>self.py_buf.buf
+
+        PyBuffer_Release(&self.py_buf)
+
+        if errno not in (cparser.HPE_OK, cparser.HPE_PAUSED_UPGRADE):
+            if self._payload_error == 0:
+                if self._last_error is not None:
+                    ex = self._last_error
+                    self._last_error = None
+                else:
+                    after = cparser.llhttp_get_error_pos(self._cparser)
+                    before = data[:after - <char*>self.py_buf.buf]
+                    after_b = after.split(b"\r\n", 1)[0]
+                    before = before.rsplit(b"\r\n", 1)[-1]
+                    data = before + after_b
+                    pointer = " " * (len(repr(before))-1) + "^"
+                    ex = parser_error_from_errno(self._cparser, data, pointer)
+                self._payload = None
+                raise ex
+
+        if self._messages:
+            messages = self._messages
+            self._messages = []
+        else:
+            messages = ()
+
+        if self._upgraded:
+            return messages, True, data[nb:]
+        else:
+            return messages, False, b""
+
+    def set_upgraded(self, val):
+        self._upgraded = val
+
+
+cdef class HttpRequestParser(HttpParser):
+
+    def __init__(
+        self, protocol, loop, int limit, timer=None,
+        size_t max_line_size=8190, size_t max_headers=32768,
+        size_t max_field_size=8190, payload_exception=None,
+        bint response_with_body=True, bint read_until_eof=False,
+        bint auto_decompress=True,
+    ):
+        self._init(cparser.HTTP_REQUEST, protocol, loop, limit, timer,
+                   max_line_size, max_headers, max_field_size,
+                   payload_exception, response_with_body, read_until_eof,
+                   auto_decompress)
+
+    cdef object _on_status_complete(self):
+        cdef int idx1, idx2
+        if not self._buf:
+            return
+        self._path = self._buf.decode('utf-8', 'surrogateescape')
+        try:
+            idx3 = len(self._path)
+            if self._cparser.method == cparser.HTTP_CONNECT:
+                # authority-form,
+                # https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.3
+                self._url = URL.build(authority=self._path, encoded=True)
+            elif idx3 > 1 and self._path[0] == '/':
+                # origin-form,
+                # https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1
+                idx1 = self._path.find("?")
+                if idx1 == -1:
+                    query = ""
+                    idx2 = self._path.find("#")
+                    if idx2 == -1:
+                        path = self._path
+                        fragment = ""
+                    else:
+                        path = self._path[0: idx2]
+                        fragment = self._path[idx2+1:]
+
+                else:
+                    path = self._path[0:idx1]
+                    idx1 += 1
+                    idx2 = self._path.find("#", idx1+1)
+                    if idx2 == -1:
+                        query = self._path[idx1:]
+                        fragment = ""
+                    else:
+                        query = self._path[idx1: idx2]
+                        fragment = self._path[idx2+1:]
+
+                self._url = URL.build(
+                    path=path,
+                    query_string=query,
+                    fragment=fragment,
+                    encoded=True,
+                )
+            else:
+                # absolute-form for proxy maybe,
+                # https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.2
+                self._url = URL(self._path, encoded=True)
+        finally:
+            PyByteArray_Resize(self._buf, 0)
+
+
+cdef class HttpResponseParser(HttpParser):
+
+    def __init__(
+        self, protocol, loop, int limit, timer=None,
+            size_t max_line_size=8190, size_t max_headers=32768,
+            size_t max_field_size=8190, payload_exception=None,
+            bint response_with_body=True, bint read_until_eof=False,
+            bint auto_decompress=True
+    ):
+        self._init(cparser.HTTP_RESPONSE, protocol, loop, limit, timer,
+                   max_line_size, max_headers, max_field_size,
+                   payload_exception, response_with_body, read_until_eof,
+                   auto_decompress)
+        # Use strict parsing on dev mode, so users are warned about broken servers.
+        if not DEBUG:
+            cparser.llhttp_set_lenient_headers(self._cparser, 1)
+            cparser.llhttp_set_lenient_optional_cr_before_lf(self._cparser, 1)
+            cparser.llhttp_set_lenient_spaces_after_chunk_size(self._cparser, 1)
+
+    cdef object _on_status_complete(self):
+        if self._buf:
+            self._reason = self._buf.decode('utf-8', 'surrogateescape')
+            PyByteArray_Resize(self._buf, 0)
+        else:
+            self._reason = self._reason or ''
+
+cdef int cb_on_message_begin(cparser.llhttp_t* parser) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+
+    pyparser._started = True
+    pyparser._headers = []
+    pyparser._raw_headers = []
+    PyByteArray_Resize(pyparser._buf, 0)
+    pyparser._path = None
+    pyparser._reason = None
+    return 0
+
+
+cdef int cb_on_url(cparser.llhttp_t* parser,
+                   const char *at, size_t length) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+    try:
+        if length > pyparser._max_line_size:
+            raise LineTooLong(
+                'Status line is too long', pyparser._max_line_size, length)
+        extend(pyparser._buf, at, length)
+    except BaseException as ex:
+        pyparser._last_error = ex
+        return -1
+    else:
+        return 0
+
+
+cdef int cb_on_status(cparser.llhttp_t* parser,
+                      const char *at, size_t length) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+    cdef str reason
+    try:
+        if length > pyparser._max_line_size:
+            raise LineTooLong(
+                'Status line is too long', pyparser._max_line_size, length)
+        extend(pyparser._buf, at, length)
+    except BaseException as ex:
+        pyparser._last_error = ex
+        return -1
+    else:
+        return 0
+
+
+cdef int cb_on_header_field(cparser.llhttp_t* parser,
+                            const char *at, size_t length) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+    cdef Py_ssize_t size
+    try:
+        pyparser._on_status_complete()
+        size = len(pyparser._raw_name) + length
+        if size > pyparser._max_field_size:
+            raise LineTooLong(
+                'Header name is too long', pyparser._max_field_size, size)
+        pyparser._on_header_field(at, length)
+    except BaseException as ex:
+        pyparser._last_error = ex
+        return -1
+    else:
+        return 0
+
+
+cdef int cb_on_header_value(cparser.llhttp_t* parser,
+                            const char *at, size_t length) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+    cdef Py_ssize_t size
+    try:
+        size = len(pyparser._raw_value) + length
+        if size > pyparser._max_field_size:
+            raise LineTooLong(
+                'Header value is too long', pyparser._max_field_size, size)
+        pyparser._on_header_value(at, length)
+    except BaseException as ex:
+        pyparser._last_error = ex
+        return -1
+    else:
+        return 0
+
+
+cdef int cb_on_headers_complete(cparser.llhttp_t* parser) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+    try:
+        pyparser._on_status_complete()
+        pyparser._on_headers_complete()
+    except BaseException as exc:
+        pyparser._last_error = exc
+        return -1
+    else:
+        if pyparser._upgraded or pyparser._cparser.method == cparser.HTTP_CONNECT:
+            return 2
+        else:
+            return 0
+
+
+cdef int cb_on_body(cparser.llhttp_t* parser,
+                    const char *at, size_t length) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+    cdef bytes body = at[:length]
+    try:
+        pyparser._payload.feed_data(body, length)
+    except BaseException as underlying_exc:
+        reraised_exc = underlying_exc
+        if pyparser._payload_exception is not None:
+            reraised_exc = pyparser._payload_exception(str(underlying_exc))
+
+        set_exception(pyparser._payload, reraised_exc, underlying_exc)
+
+        pyparser._payload_error = 1
+        return -1
+    else:
+        return 0
+
+
+cdef int cb_on_message_complete(cparser.llhttp_t* parser) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+    try:
+        pyparser._started = False
+        pyparser._on_message_complete()
+    except BaseException as exc:
+        pyparser._last_error = exc
+        return -1
+    else:
+        return 0
+
+
+cdef int cb_on_chunk_header(cparser.llhttp_t* parser) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+    try:
+        pyparser._on_chunk_header()
+    except BaseException as exc:
+        pyparser._last_error = exc
+        return -1
+    else:
+        return 0
+
+
+cdef int cb_on_chunk_complete(cparser.llhttp_t* parser) except -1:
+    cdef HttpParser pyparser = <HttpParser>parser.data
+    try:
+        pyparser._on_chunk_complete()
+    except BaseException as exc:
+        pyparser._last_error = exc
+        return -1
+    else:
+        return 0
+
+
+cdef parser_error_from_errno(cparser.llhttp_t* parser, data, pointer):
+    cdef cparser.llhttp_errno_t errno = cparser.llhttp_get_errno(parser)
+    cdef bytes desc = cparser.llhttp_get_error_reason(parser)
+
+    err_msg = "{}:\n\n  {!r}\n  {}".format(desc.decode("latin-1"), data, pointer)
+
+    if errno in {cparser.HPE_CB_MESSAGE_BEGIN,
+                 cparser.HPE_CB_HEADERS_COMPLETE,
+                 cparser.HPE_CB_MESSAGE_COMPLETE,
+                 cparser.HPE_CB_CHUNK_HEADER,
+                 cparser.HPE_CB_CHUNK_COMPLETE,
+                 cparser.HPE_INVALID_CONSTANT,
+                 cparser.HPE_INVALID_HEADER_TOKEN,
+                 cparser.HPE_INVALID_CONTENT_LENGTH,
+                 cparser.HPE_INVALID_CHUNK_SIZE,
+                 cparser.HPE_INVALID_EOF_STATE,
+                 cparser.HPE_INVALID_TRANSFER_ENCODING}:
+        return BadHttpMessage(err_msg)
+    elif errno == cparser.HPE_INVALID_METHOD:
+        return BadHttpMethod(error=err_msg)
+    elif errno in {cparser.HPE_INVALID_STATUS,
+                   cparser.HPE_INVALID_VERSION}:
+        return BadStatusLine(error=err_msg)
+    elif errno == cparser.HPE_INVALID_URL:
+        return InvalidURLError(err_msg)
+
+    return BadHttpMessage(err_msg)

backend_service/venv/lib/python3.13/site-packages/aiohttp/_http_writer.pyx

@@ -0,0 +1,162 @@
+from cpython.bytes cimport PyBytes_FromStringAndSize
+from cpython.exc cimport PyErr_NoMemory
+from cpython.mem cimport PyMem_Free, PyMem_Malloc, PyMem_Realloc
+from cpython.object cimport PyObject_Str
+from libc.stdint cimport uint8_t, uint64_t
+from libc.string cimport memcpy
+
+from multidict import istr
+
+DEF BUF_SIZE = 16 * 1024  # 16KiB
+
+cdef object _istr = istr
+
+
+# ----------------- writer ---------------------------
+
+cdef struct Writer:
+    char *buf
+    Py_ssize_t size
+    Py_ssize_t pos
+    bint heap_allocated
+
+cdef inline void _init_writer(Writer* writer, char *buf):
+    writer.buf = buf
+    writer.size = BUF_SIZE
+    writer.pos = 0
+    writer.heap_allocated = 0
+
+
+cdef inline void _release_writer(Writer* writer):
+    if writer.heap_allocated:
+        PyMem_Free(writer.buf)
+
+
+cdef inline int _write_byte(Writer* writer, uint8_t ch):
+    cdef char * buf
+    cdef Py_ssize_t size
+
+    if writer.pos == writer.size:
+        # reallocate
+        size = writer.size + BUF_SIZE
+        if not writer.heap_allocated:
+            buf = <char*>PyMem_Malloc(size)
+            if buf == NULL:
+                PyErr_NoMemory()
+                return -1
+            memcpy(buf, writer.buf, writer.size)
+        else:
+            buf = <char*>PyMem_Realloc(writer.buf, size)
+            if buf == NULL:
+                PyErr_NoMemory()
+                return -1
+        writer.buf = buf
+        writer.size = size
+        writer.heap_allocated = 1
+    writer.buf[writer.pos] = <char>ch
+    writer.pos += 1
+    return 0
+
+
+cdef inline int _write_utf8(Writer* writer, Py_UCS4 symbol):
+    cdef uint64_t utf = <uint64_t> symbol
+
+    if utf < 0x80:
+        return _write_byte(writer, <uint8_t>utf)
+    elif utf < 0x800:
+        if _write_byte(writer, <uint8_t>(0xc0 | (utf >> 6))) < 0:
+            return -1
+        return _write_byte(writer,  <uint8_t>(0x80 | (utf & 0x3f)))
+    elif 0xD800 <= utf <= 0xDFFF:
+        # surogate pair, ignored
+        return 0
+    elif utf < 0x10000:
+        if _write_byte(writer, <uint8_t>(0xe0 | (utf >> 12))) < 0:
+            return -1
+        if _write_byte(writer, <uint8_t>(0x80 | ((utf >> 6) & 0x3f))) < 0:
+            return -1
+        return _write_byte(writer, <uint8_t>(0x80 | (utf & 0x3f)))
+    elif utf > 0x10FFFF:
+        # symbol is too large
+        return 0
+    else:
+        if _write_byte(writer,  <uint8_t>(0xf0 | (utf >> 18))) < 0:
+            return -1
+        if _write_byte(writer,
+                       <uint8_t>(0x80 | ((utf >> 12) & 0x3f))) < 0:
+           return -1
+        if _write_byte(writer,
+                       <uint8_t>(0x80 | ((utf >> 6) & 0x3f))) < 0:
+            return -1
+        return _write_byte(writer, <uint8_t>(0x80 | (utf & 0x3f)))
+
+
+cdef inline int _write_str(Writer* writer, str s):
+    cdef Py_UCS4 ch
+    for ch in s:
+        if _write_utf8(writer, ch) < 0:
+            return -1
+
+
+cdef inline int _write_str_raise_on_nlcr(Writer* writer, object s):
+    cdef Py_UCS4 ch
+    cdef str out_str
+    if type(s) is str:
+        out_str = <str>s
+    elif type(s) is _istr:
+        out_str = PyObject_Str(s)
+    elif not isinstance(s, str):
+        raise TypeError("Cannot serialize non-str key {!r}".format(s))
+    else:
+        out_str = str(s)
+
+    for ch in out_str:
+        if ch == 0x0D or ch == 0x0A:
+            raise ValueError(
+                "Newline or carriage return detected in headers. "
+                "Potential header injection attack."
+            )
+        if _write_utf8(writer, ch) < 0:
+            return -1
+
+
+# --------------- _serialize_headers ----------------------
+
+def _serialize_headers(str status_line, headers):
+    cdef Writer writer
+    cdef object key
+    cdef object val
+    cdef char buf[BUF_SIZE]
+
+    _init_writer(&writer, buf)
+
+    try:
+        if _write_str(&writer, status_line) < 0:
+            raise
+        if _write_byte(&writer, b'\r') < 0:
+            raise
+        if _write_byte(&writer, b'\n') < 0:
+            raise
+
+        for key, val in headers.items():
+            if _write_str_raise_on_nlcr(&writer, key) < 0:
+                raise
+            if _write_byte(&writer, b':') < 0:
+                raise
+            if _write_byte(&writer, b' ') < 0:
+                raise
+            if _write_str_raise_on_nlcr(&writer, val) < 0:
+                raise
+            if _write_byte(&writer, b'\r') < 0:
+                raise
+            if _write_byte(&writer, b'\n') < 0:
+                raise
+
+        if _write_byte(&writer, b'\r') < 0:
+            raise
+        if _write_byte(&writer, b'\n') < 0:
+            raise
+
+        return PyBytes_FromStringAndSize(writer.buf, writer.pos)
+    finally:
+        _release_writer(&writer)

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/.hash/mask.pxd.hash

@@ -0,0 +1 @@
+b01999d409b29bd916e067bc963d5f2d9ee63cfc9ae0bccb769910131417bf93  /home/runner/work/aiohttp/aiohttp/aiohttp/_websocket/mask.pxd

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/.hash/mask.pyx.hash

@@ -0,0 +1 @@
+0478ceb55d0ed30ef1a7da742cd003449bc69a07cf9fdb06789bd2b347cbfffe  /home/runner/work/aiohttp/aiohttp/aiohttp/_websocket/mask.pyx

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/.hash/reader_c.pxd.hash

@@ -0,0 +1 @@
+9e5fe78ed0ebce5414d2b8e01868d90c1facc20b84d2d5ff6c23e86e44a155ae  /home/runner/work/aiohttp/aiohttp/aiohttp/_websocket/reader_c.pxd

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/__init__.py

@@ -0,0 +1 @@
+"""WebSocket protocol versions 13 and 8."""

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/helpers.py

@@ -0,0 +1,147 @@
+"""Helpers for WebSocket protocol versions 13 and 8."""
+
+import functools
+import re
+from struct import Struct
+from typing import TYPE_CHECKING, Final, List, Optional, Pattern, Tuple
+
+from ..helpers import NO_EXTENSIONS
+from .models import WSHandshakeError
+
+UNPACK_LEN3 = Struct("!Q").unpack_from
+UNPACK_CLOSE_CODE = Struct("!H").unpack
+PACK_LEN1 = Struct("!BB").pack
+PACK_LEN2 = Struct("!BBH").pack
+PACK_LEN3 = Struct("!BBQ").pack
+PACK_CLOSE_CODE = Struct("!H").pack
+PACK_RANDBITS = Struct("!L").pack
+MSG_SIZE: Final[int] = 2**14
+MASK_LEN: Final[int] = 4
+
+WS_KEY: Final[bytes] = b"258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
+
+
+# Used by _websocket_mask_python
+@functools.lru_cache
+def _xor_table() -> List[bytes]:
+    return [bytes(a ^ b for a in range(256)) for b in range(256)]
+
+
+def _websocket_mask_python(mask: bytes, data: bytearray) -> None:
+    """Websocket masking function.
+
+    `mask` is a `bytes` object of length 4; `data` is a `bytearray`
+    object of any length. The contents of `data` are masked with `mask`,
+    as specified in section 5.3 of RFC 6455.
+
+    Note that this function mutates the `data` argument.
+
+    This pure-python implementation may be replaced by an optimized
+    version when available.
+
+    """
+    assert isinstance(data, bytearray), data
+    assert len(mask) == 4, mask
+
+    if data:
+        _XOR_TABLE = _xor_table()
+        a, b, c, d = (_XOR_TABLE[n] for n in mask)
+        data[::4] = data[::4].translate(a)
+        data[1::4] = data[1::4].translate(b)
+        data[2::4] = data[2::4].translate(c)
+        data[3::4] = data[3::4].translate(d)
+
+
+if TYPE_CHECKING or NO_EXTENSIONS:  # pragma: no cover
+    websocket_mask = _websocket_mask_python
+else:
+    try:
+        from .mask import _websocket_mask_cython  # type: ignore[import-not-found]
+
+        websocket_mask = _websocket_mask_cython
+    except ImportError:  # pragma: no cover
+        websocket_mask = _websocket_mask_python
+
+
+_WS_EXT_RE: Final[Pattern[str]] = re.compile(
+    r"^(?:;\s*(?:"
+    r"(server_no_context_takeover)|"
+    r"(client_no_context_takeover)|"
+    r"(server_max_window_bits(?:=(\d+))?)|"
+    r"(client_max_window_bits(?:=(\d+))?)))*$"
+)
+
+_WS_EXT_RE_SPLIT: Final[Pattern[str]] = re.compile(r"permessage-deflate([^,]+)?")
+
+
+def ws_ext_parse(extstr: Optional[str], isserver: bool = False) -> Tuple[int, bool]:
+    if not extstr:
+        return 0, False
+
+    compress = 0
+    notakeover = False
+    for ext in _WS_EXT_RE_SPLIT.finditer(extstr):
+        defext = ext.group(1)
+        # Return compress = 15 when get `permessage-deflate`
+        if not defext:
+            compress = 15
+            break
+        match = _WS_EXT_RE.match(defext)
+        if match:
+            compress = 15
+            if isserver:
+                # Server never fail to detect compress handshake.
+                # Server does not need to send max wbit to client
+                if match.group(4):
+                    compress = int(match.group(4))
+                    # Group3 must match if group4 matches
+                    # Compress wbit 8 does not support in zlib
+                    # If compress level not support,
+                    # CONTINUE to next extension
+                    if compress > 15 or compress < 9:
+                        compress = 0
+                        continue
+                if match.group(1):
+                    notakeover = True
+                # Ignore regex group 5 & 6 for client_max_window_bits
+                break
+            else:
+                if match.group(6):
+                    compress = int(match.group(6))
+                    # Group5 must match if group6 matches
+                    # Compress wbit 8 does not support in zlib
+                    # If compress level not support,
+                    # FAIL the parse progress
+                    if compress > 15 or compress < 9:
+                        raise WSHandshakeError("Invalid window size")
+                if match.group(2):
+                    notakeover = True
+                # Ignore regex group 5 & 6 for client_max_window_bits
+                break
+        # Return Fail if client side and not match
+        elif not isserver:
+            raise WSHandshakeError("Extension for deflate not supported" + ext.group(1))
+
+    return compress, notakeover
+
+
+def ws_ext_gen(
+    compress: int = 15, isserver: bool = False, server_notakeover: bool = False
+) -> str:
+    # client_notakeover=False not used for server
+    # compress wbit 8 does not support in zlib
+    if compress < 9 or compress > 15:
+        raise ValueError(
+            "Compress wbits must between 9 and 15, zlib does not support wbits=8"
+        )
+    enabledext = ["permessage-deflate"]
+    if not isserver:
+        enabledext.append("client_max_window_bits")
+
+    if compress < 15:
+        enabledext.append("server_max_window_bits=" + str(compress))
+    if server_notakeover:
+        enabledext.append("server_no_context_takeover")
+    # if client_notakeover:
+    #     enabledext.append('client_no_context_takeover')
+    return "; ".join(enabledext)

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/mask.pxd

@@ -0,0 +1,3 @@
+"""Cython declarations for websocket masking."""
+
+cpdef void _websocket_mask_cython(bytes mask, bytearray data)

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/mask.pyx

@@ -0,0 +1,48 @@
+from cpython cimport PyBytes_AsString
+
+
+#from cpython cimport PyByteArray_AsString # cython still not exports that
+cdef extern from "Python.h":
+    char* PyByteArray_AsString(bytearray ba) except NULL
+
+from libc.stdint cimport uint32_t, uint64_t, uintmax_t
+
+
+cpdef void _websocket_mask_cython(bytes mask, bytearray data):
+    """Note, this function mutates its `data` argument
+    """
+    cdef:
+        Py_ssize_t data_len, i
+        # bit operations on signed integers are implementation-specific
+        unsigned char * in_buf
+        const unsigned char * mask_buf
+        uint32_t uint32_msk
+        uint64_t uint64_msk
+
+    assert len(mask) == 4
+
+    data_len = len(data)
+    in_buf = <unsigned char*>PyByteArray_AsString(data)
+    mask_buf = <const unsigned char*>PyBytes_AsString(mask)
+    uint32_msk = (<uint32_t*>mask_buf)[0]
+
+    # TODO: align in_data ptr to achieve even faster speeds
+    # does it need in python ?! malloc() always aligns to sizeof(long) bytes
+
+    if sizeof(size_t) >= 8:
+        uint64_msk = uint32_msk
+        uint64_msk = (uint64_msk << 32) | uint32_msk
+
+        while data_len >= 8:
+            (<uint64_t*>in_buf)[0] ^= uint64_msk
+            in_buf += 8
+            data_len -= 8
+
+
+    while data_len >= 4:
+        (<uint32_t*>in_buf)[0] ^= uint32_msk
+        in_buf += 4
+        data_len -= 4
+
+    for i in range(0, data_len):
+        in_buf[i] ^= mask_buf[i]

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/models.py

@@ -0,0 +1,84 @@
+"""Models for WebSocket protocol versions 13 and 8."""
+
+import json
+from enum import IntEnum
+from typing import Any, Callable, Final, NamedTuple, Optional, cast
+
+WS_DEFLATE_TRAILING: Final[bytes] = bytes([0x00, 0x00, 0xFF, 0xFF])
+
+
+class WSCloseCode(IntEnum):
+    OK = 1000
+    GOING_AWAY = 1001
+    PROTOCOL_ERROR = 1002
+    UNSUPPORTED_DATA = 1003
+    ABNORMAL_CLOSURE = 1006
+    INVALID_TEXT = 1007
+    POLICY_VIOLATION = 1008
+    MESSAGE_TOO_BIG = 1009
+    MANDATORY_EXTENSION = 1010
+    INTERNAL_ERROR = 1011
+    SERVICE_RESTART = 1012
+    TRY_AGAIN_LATER = 1013
+    BAD_GATEWAY = 1014
+
+
+class WSMsgType(IntEnum):
+    # websocket spec types
+    CONTINUATION = 0x0
+    TEXT = 0x1
+    BINARY = 0x2
+    PING = 0x9
+    PONG = 0xA
+    CLOSE = 0x8
+
+    # aiohttp specific types
+    CLOSING = 0x100
+    CLOSED = 0x101
+    ERROR = 0x102
+
+    text = TEXT
+    binary = BINARY
+    ping = PING
+    pong = PONG
+    close = CLOSE
+    closing = CLOSING
+    closed = CLOSED
+    error = ERROR
+
+
+class WSMessage(NamedTuple):
+    type: WSMsgType
+    # To type correctly, this would need some kind of tagged union for each type.
+    data: Any
+    extra: Optional[str]
+
+    def json(self, *, loads: Callable[[Any], Any] = json.loads) -> Any:
+        """Return parsed JSON data.
+
+        .. versionadded:: 0.22
+        """
+        return loads(self.data)
+
+
+# Constructing the tuple directly to avoid the overhead of
+# the lambda and arg processing since NamedTuples are constructed
+# with a run time built lambda
+# https://github.com/python/cpython/blob/d83fcf8371f2f33c7797bc8f5423a8bca8c46e5c/Lib/collections/__init__.py#L441
+WS_CLOSED_MESSAGE = tuple.__new__(WSMessage, (WSMsgType.CLOSED, None, None))
+WS_CLOSING_MESSAGE = tuple.__new__(WSMessage, (WSMsgType.CLOSING, None, None))
+
+
+class WebSocketError(Exception):
+    """WebSocket protocol parser error."""
+
+    def __init__(self, code: int, message: str) -> None:
+        self.code = code
+        super().__init__(code, message)
+
+    def __str__(self) -> str:
+        return cast(str, self.args[1])
+
+
+class WSHandshakeError(Exception):
+    """WebSocket protocol handshake error."""

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/reader.py

@@ -0,0 +1,31 @@
+"""Reader for WebSocket protocol versions 13 and 8."""
+
+from typing import TYPE_CHECKING
+
+from ..helpers import NO_EXTENSIONS
+
+if TYPE_CHECKING or NO_EXTENSIONS:  # pragma: no cover
+    from .reader_py import (
+        WebSocketDataQueue as WebSocketDataQueuePython,
+        WebSocketReader as WebSocketReaderPython,
+    )
+
+    WebSocketReader = WebSocketReaderPython
+    WebSocketDataQueue = WebSocketDataQueuePython
+else:
+    try:
+        from .reader_c import (  # type: ignore[import-not-found]
+            WebSocketDataQueue as WebSocketDataQueueCython,
+            WebSocketReader as WebSocketReaderCython,
+        )
+
+        WebSocketReader = WebSocketReaderCython
+        WebSocketDataQueue = WebSocketDataQueueCython
+    except ImportError:  # pragma: no cover
+        from .reader_py import (
+            WebSocketDataQueue as WebSocketDataQueuePython,
+            WebSocketReader as WebSocketReaderPython,
+        )
+
+        WebSocketReader = WebSocketReaderPython
+        WebSocketDataQueue = WebSocketDataQueuePython

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/reader_c.pxd

@@ -0,0 +1,110 @@
+import cython
+
+from .mask cimport _websocket_mask_cython as websocket_mask
+
+
+cdef unsigned int READ_HEADER
+cdef unsigned int READ_PAYLOAD_LENGTH
+cdef unsigned int READ_PAYLOAD_MASK
+cdef unsigned int READ_PAYLOAD
+
+cdef int OP_CODE_NOT_SET
+cdef int OP_CODE_CONTINUATION
+cdef int OP_CODE_TEXT
+cdef int OP_CODE_BINARY
+cdef int OP_CODE_CLOSE
+cdef int OP_CODE_PING
+cdef int OP_CODE_PONG
+
+cdef int COMPRESSED_NOT_SET
+cdef int COMPRESSED_FALSE
+cdef int COMPRESSED_TRUE
+
+cdef object UNPACK_LEN3
+cdef object UNPACK_CLOSE_CODE
+cdef object TUPLE_NEW
+
+cdef object WSMsgType
+cdef object WSMessage
+
+cdef object WS_MSG_TYPE_TEXT
+cdef object WS_MSG_TYPE_BINARY
+
+cdef set ALLOWED_CLOSE_CODES
+cdef set MESSAGE_TYPES_WITH_CONTENT
+
+cdef tuple EMPTY_FRAME
+cdef tuple EMPTY_FRAME_ERROR
+
+cdef class WebSocketDataQueue:
+
+    cdef unsigned int _size
+    cdef public object _protocol
+    cdef unsigned int _limit
+    cdef object _loop
+    cdef bint _eof
+    cdef object _waiter
+    cdef object _exception
+    cdef public object _buffer
+    cdef object _get_buffer
+    cdef object _put_buffer
+
+    cdef void _release_waiter(self)
+
+    cpdef void feed_data(self, object data, unsigned int size)
+
+    @cython.locals(size="unsigned int")
+    cdef _read_from_buffer(self)
+
+cdef class WebSocketReader:
+
+    cdef WebSocketDataQueue queue
+    cdef unsigned int _max_msg_size
+
+    cdef Exception _exc
+    cdef bytearray _partial
+    cdef unsigned int _state
+
+    cdef int _opcode
+    cdef bint _frame_fin
+    cdef int _frame_opcode
+    cdef list _payload_fragments
+    cdef Py_ssize_t _frame_payload_len
+
+    cdef bytes _tail
+    cdef bint _has_mask
+    cdef bytes _frame_mask
+    cdef Py_ssize_t _payload_bytes_to_read
+    cdef unsigned int _payload_len_flag
+    cdef int _compressed
+    cdef object _decompressobj
+    cdef bint _compress
+
+    cpdef tuple feed_data(self, object data)
+
+    @cython.locals(
+        is_continuation=bint,
+        fin=bint,
+        has_partial=bint,
+        payload_merged=bytes,
+    )
+    cpdef void _handle_frame(self, bint fin, int opcode, object payload, int compressed) except *
+
+    @cython.locals(
+        start_pos=Py_ssize_t,
+        data_len=Py_ssize_t,
+        length=Py_ssize_t,
+        chunk_size=Py_ssize_t,
+        chunk_len=Py_ssize_t,
+        data_len=Py_ssize_t,
+        data_cstr="const unsigned char *",
+        first_byte="unsigned char",
+        second_byte="unsigned char",
+        f_start_pos=Py_ssize_t,
+        f_end_pos=Py_ssize_t,
+        has_mask=bint,
+        fin=bint,
+        had_fragments=Py_ssize_t,
+        payload_bytearray=bytearray,
+    )
+    cpdef void _feed_data(self, bytes data) except *

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/reader_c.py

@@ -0,0 +1,476 @@
+"""Reader for WebSocket protocol versions 13 and 8."""
+
+import asyncio
+import builtins
+from collections import deque
+from typing import Deque, Final, Optional, Set, Tuple, Union
+
+from ..base_protocol import BaseProtocol
+from ..compression_utils import ZLibDecompressor
+from ..helpers import _EXC_SENTINEL, set_exception
+from ..streams import EofStream
+from .helpers import UNPACK_CLOSE_CODE, UNPACK_LEN3, websocket_mask
+from .models import (
+    WS_DEFLATE_TRAILING,
+    WebSocketError,
+    WSCloseCode,
+    WSMessage,
+    WSMsgType,
+)
+
+ALLOWED_CLOSE_CODES: Final[Set[int]] = {int(i) for i in WSCloseCode}
+
+# States for the reader, used to parse the WebSocket frame
+# integer values are used so they can be cythonized
+READ_HEADER = 1
+READ_PAYLOAD_LENGTH = 2
+READ_PAYLOAD_MASK = 3
+READ_PAYLOAD = 4
+
+WS_MSG_TYPE_BINARY = WSMsgType.BINARY
+WS_MSG_TYPE_TEXT = WSMsgType.TEXT
+
+# WSMsgType values unpacked so they can by cythonized to ints
+OP_CODE_NOT_SET = -1
+OP_CODE_CONTINUATION = WSMsgType.CONTINUATION.value
+OP_CODE_TEXT = WSMsgType.TEXT.value
+OP_CODE_BINARY = WSMsgType.BINARY.value
+OP_CODE_CLOSE = WSMsgType.CLOSE.value
+OP_CODE_PING = WSMsgType.PING.value
+OP_CODE_PONG = WSMsgType.PONG.value
+
+EMPTY_FRAME_ERROR = (True, b"")
+EMPTY_FRAME = (False, b"")
+
+COMPRESSED_NOT_SET = -1
+COMPRESSED_FALSE = 0
+COMPRESSED_TRUE = 1
+
+TUPLE_NEW = tuple.__new__
+
+cython_int = int  # Typed to int in Python, but cython with use a signed int in the pxd
+
+
+class WebSocketDataQueue:
+    """WebSocketDataQueue resumes and pauses an underlying stream.
+
+    It is a destination for WebSocket data.
+    """
+
+    def __init__(
+        self, protocol: BaseProtocol, limit: int, *, loop: asyncio.AbstractEventLoop
+    ) -> None:
+        self._size = 0
+        self._protocol = protocol
+        self._limit = limit * 2
+        self._loop = loop
+        self._eof = False
+        self._waiter: Optional[asyncio.Future[None]] = None
+        self._exception: Union[BaseException, None] = None
+        self._buffer: Deque[Tuple[WSMessage, int]] = deque()
+        self._get_buffer = self._buffer.popleft
+        self._put_buffer = self._buffer.append
+
+    def is_eof(self) -> bool:
+        return self._eof
+
+    def exception(self) -> Optional[BaseException]:
+        return self._exception
+
+    def set_exception(
+        self,
+        exc: BaseException,
+        exc_cause: builtins.BaseException = _EXC_SENTINEL,
+    ) -> None:
+        self._eof = True
+        self._exception = exc
+        if (waiter := self._waiter) is not None:
+            self._waiter = None
+            set_exception(waiter, exc, exc_cause)
+
+    def _release_waiter(self) -> None:
+        if (waiter := self._waiter) is None:
+            return
+        self._waiter = None
+        if not waiter.done():
+            waiter.set_result(None)
+
+    def feed_eof(self) -> None:
+        self._eof = True
+        self._release_waiter()
+        self._exception = None  # Break cyclic references
+
+    def feed_data(self, data: "WSMessage", size: "cython_int") -> None:
+        self._size += size
+        self._put_buffer((data, size))
+        self._release_waiter()
+        if self._size > self._limit and not self._protocol._reading_paused:
+            self._protocol.pause_reading()
+
+    async def read(self) -> WSMessage:
+        if not self._buffer and not self._eof:
+            assert not self._waiter
+            self._waiter = self._loop.create_future()
+            try:
+                await self._waiter
+            except (asyncio.CancelledError, asyncio.TimeoutError):
+                self._waiter = None
+                raise
+        return self._read_from_buffer()
+
+    def _read_from_buffer(self) -> WSMessage:
+        if self._buffer:
+            data, size = self._get_buffer()
+            self._size -= size
+            if self._size < self._limit and self._protocol._reading_paused:
+                self._protocol.resume_reading()
+            return data
+        if self._exception is not None:
+            raise self._exception
+        raise EofStream
+
+
+class WebSocketReader:
+    def __init__(
+        self, queue: WebSocketDataQueue, max_msg_size: int, compress: bool = True
+    ) -> None:
+        self.queue = queue
+        self._max_msg_size = max_msg_size
+
+        self._exc: Optional[Exception] = None
+        self._partial = bytearray()
+        self._state = READ_HEADER
+
+        self._opcode: int = OP_CODE_NOT_SET
+        self._frame_fin = False
+        self._frame_opcode: int = OP_CODE_NOT_SET
+        self._payload_fragments: list[bytes] = []
+        self._frame_payload_len = 0
+
+        self._tail: bytes = b""
+        self._has_mask = False
+        self._frame_mask: Optional[bytes] = None
+        self._payload_bytes_to_read = 0
+        self._payload_len_flag = 0
+        self._compressed: int = COMPRESSED_NOT_SET
+        self._decompressobj: Optional[ZLibDecompressor] = None
+        self._compress = compress
+
+    def feed_eof(self) -> None:
+        self.queue.feed_eof()
+
+    # data can be bytearray on Windows because proactor event loop uses bytearray
+    # and asyncio types this to Union[bytes, bytearray, memoryview] so we need
+    # coerce data to bytes if it is not
+    def feed_data(
+        self, data: Union[bytes, bytearray, memoryview]
+    ) -> Tuple[bool, bytes]:
+        if type(data) is not bytes:
+            data = bytes(data)
+
+        if self._exc is not None:
+            return True, data
+
+        try:
+            self._feed_data(data)
+        except Exception as exc:
+            self._exc = exc
+            set_exception(self.queue, exc)
+            return EMPTY_FRAME_ERROR
+
+        return EMPTY_FRAME
+
+    def _handle_frame(
+        self,
+        fin: bool,
+        opcode: Union[int, cython_int],  # Union intended: Cython pxd uses C int
+        payload: Union[bytes, bytearray],
+        compressed: Union[int, cython_int],  # Union intended: Cython pxd uses C int
+    ) -> None:
+        msg: WSMessage
+        if opcode in {OP_CODE_TEXT, OP_CODE_BINARY, OP_CODE_CONTINUATION}:
+            # load text/binary
+            if not fin:
+                # got partial frame payload
+                if opcode != OP_CODE_CONTINUATION:
+                    self._opcode = opcode
+                self._partial += payload
+                if self._max_msg_size and len(self._partial) >= self._max_msg_size:
+                    raise WebSocketError(
+                        WSCloseCode.MESSAGE_TOO_BIG,
+                        f"Message size {len(self._partial)} "
+                        f"exceeds limit {self._max_msg_size}",
+                    )
+                return
+
+            has_partial = bool(self._partial)
+            if opcode == OP_CODE_CONTINUATION:
+                if self._opcode == OP_CODE_NOT_SET:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Continuation frame for non started message",
+                    )
+                opcode = self._opcode
+                self._opcode = OP_CODE_NOT_SET
+            # previous frame was non finished
+            # we should get continuation opcode
+            elif has_partial:
+                raise WebSocketError(
+                    WSCloseCode.PROTOCOL_ERROR,
+                    "The opcode in non-fin frame is expected "
+                    f"to be zero, got {opcode!r}",
+                )
+
+            assembled_payload: Union[bytes, bytearray]
+            if has_partial:
+                assembled_payload = self._partial + payload
+                self._partial.clear()
+            else:
+                assembled_payload = payload
+
+            if self._max_msg_size and len(assembled_payload) >= self._max_msg_size:
+                raise WebSocketError(
+                    WSCloseCode.MESSAGE_TOO_BIG,
+                    f"Message size {len(assembled_payload)} "
+                    f"exceeds limit {self._max_msg_size}",
+                )
+
+            # Decompress process must to be done after all packets
+            # received.
+            if compressed:
+                if not self._decompressobj:
+                    self._decompressobj = ZLibDecompressor(suppress_deflate_header=True)
+                # XXX: It's possible that the zlib backend (isal is known to
+                # do this, maybe others too?) will return max_length bytes,
+                # but internally buffer more data such that the payload is
+                # >max_length, so we return one extra byte and if we're able
+                # to do that, then the message is too big.
+                payload_merged = self._decompressobj.decompress_sync(
+                    assembled_payload + WS_DEFLATE_TRAILING,
+                    (
+                        self._max_msg_size + 1
+                        if self._max_msg_size
+                        else self._max_msg_size
+                    ),
+                )
+                if self._max_msg_size and len(payload_merged) > self._max_msg_size:
+                    raise WebSocketError(
+                        WSCloseCode.MESSAGE_TOO_BIG,
+                        f"Decompressed message exceeds size limit {self._max_msg_size}",
+                    )
+            elif type(assembled_payload) is bytes:
+                payload_merged = assembled_payload
+            else:
+                payload_merged = bytes(assembled_payload)
+
+            if opcode == OP_CODE_TEXT:
+                try:
+                    text = payload_merged.decode("utf-8")
+                except UnicodeDecodeError as exc:
+                    raise WebSocketError(
+                        WSCloseCode.INVALID_TEXT, "Invalid UTF-8 text message"
+                    ) from exc
+
+                # XXX: The Text and Binary messages here can be a performance
+                # bottleneck, so we use tuple.__new__ to improve performance.
+                # This is not type safe, but many tests should fail in
+                # test_client_ws_functional.py if this is wrong.
+                self.queue.feed_data(
+                    TUPLE_NEW(WSMessage, (WS_MSG_TYPE_TEXT, text, "")),
+                    len(payload_merged),
+                )
+            else:
+                self.queue.feed_data(
+                    TUPLE_NEW(WSMessage, (WS_MSG_TYPE_BINARY, payload_merged, "")),
+                    len(payload_merged),
+                )
+        elif opcode == OP_CODE_CLOSE:
+            if len(payload) >= 2:
+                close_code = UNPACK_CLOSE_CODE(payload[:2])[0]
+                if close_code < 3000 and close_code not in ALLOWED_CLOSE_CODES:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        f"Invalid close code: {close_code}",
+                    )
+                try:
+                    close_message = payload[2:].decode("utf-8")
+                except UnicodeDecodeError as exc:
+                    raise WebSocketError(
+                        WSCloseCode.INVALID_TEXT, "Invalid UTF-8 text message"
+                    ) from exc
+                msg = TUPLE_NEW(WSMessage, (WSMsgType.CLOSE, close_code, close_message))
+            elif payload:
+                raise WebSocketError(
+                    WSCloseCode.PROTOCOL_ERROR,
+                    f"Invalid close frame: {fin} {opcode} {payload!r}",
+                )
+            else:
+                msg = TUPLE_NEW(WSMessage, (WSMsgType.CLOSE, 0, ""))
+
+            self.queue.feed_data(msg, 0)
+        elif opcode == OP_CODE_PING:
+            msg = TUPLE_NEW(WSMessage, (WSMsgType.PING, payload, ""))
+            self.queue.feed_data(msg, len(payload))
+        elif opcode == OP_CODE_PONG:
+            msg = TUPLE_NEW(WSMessage, (WSMsgType.PONG, payload, ""))
+            self.queue.feed_data(msg, len(payload))
+        else:
+            raise WebSocketError(
+                WSCloseCode.PROTOCOL_ERROR, f"Unexpected opcode={opcode!r}"
+            )
+
+    def _feed_data(self, data: bytes) -> None:
+        """Return the next frame from the socket."""
+        if self._tail:
+            data, self._tail = self._tail + data, b""
+
+        start_pos: int = 0
+        data_len = len(data)
+        data_cstr = data
+
+        while True:
+            # read header
+            if self._state == READ_HEADER:
+                if data_len - start_pos < 2:
+                    break
+                first_byte = data_cstr[start_pos]
+                second_byte = data_cstr[start_pos + 1]
+                start_pos += 2
+
+                fin = (first_byte >> 7) & 1
+                rsv1 = (first_byte >> 6) & 1
+                rsv2 = (first_byte >> 5) & 1
+                rsv3 = (first_byte >> 4) & 1
+                opcode = first_byte & 0xF
+
+                # frame-fin = %x0 ; more frames of this message follow
+                #           / %x1 ; final frame of this message
+                # frame-rsv1 = %x0 ;
+                #    1 bit, MUST be 0 unless negotiated otherwise
+                # frame-rsv2 = %x0 ;
+                #    1 bit, MUST be 0 unless negotiated otherwise
+                # frame-rsv3 = %x0 ;
+                #    1 bit, MUST be 0 unless negotiated otherwise
+                #
+                # Remove rsv1 from this test for deflate development
+                if rsv2 or rsv3 or (rsv1 and not self._compress):
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Received frame with non-zero reserved bits",
+                    )
+
+                if opcode > 0x7 and fin == 0:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Received fragmented control frame",
+                    )
+
+                has_mask = (second_byte >> 7) & 1
+                length = second_byte & 0x7F
+
+                # Control frames MUST have a payload
+                # length of 125 bytes or less
+                if opcode > 0x7 and length > 125:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Control frame payload cannot be larger than 125 bytes",
+                    )
+
+                # Set compress status if last package is FIN
+                # OR set compress status if this is first fragment
+                # Raise error if not first fragment with rsv1 = 0x1
+                if self._frame_fin or self._compressed == COMPRESSED_NOT_SET:
+                    self._compressed = COMPRESSED_TRUE if rsv1 else COMPRESSED_FALSE
+                elif rsv1:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Received frame with non-zero reserved bits",
+                    )
+
+                self._frame_fin = bool(fin)
+                self._frame_opcode = opcode
+                self._has_mask = bool(has_mask)
+                self._payload_len_flag = length
+                self._state = READ_PAYLOAD_LENGTH
+
+            # read payload length
+            if self._state == READ_PAYLOAD_LENGTH:
+                len_flag = self._payload_len_flag
+                if len_flag == 126:
+                    if data_len - start_pos < 2:
+                        break
+                    first_byte = data_cstr[start_pos]
+                    second_byte = data_cstr[start_pos + 1]
+                    start_pos += 2
+                    self._payload_bytes_to_read = first_byte << 8 | second_byte
+                elif len_flag > 126:
+                    if data_len - start_pos < 8:
+                        break
+                    self._payload_bytes_to_read = UNPACK_LEN3(data, start_pos)[0]
+                    start_pos += 8
+                else:
+                    self._payload_bytes_to_read = len_flag
+
+                self._state = READ_PAYLOAD_MASK if self._has_mask else READ_PAYLOAD
+
+            # read payload mask
+            if self._state == READ_PAYLOAD_MASK:
+                if data_len - start_pos < 4:
+                    break
+                self._frame_mask = data_cstr[start_pos : start_pos + 4]
+                start_pos += 4
+                self._state = READ_PAYLOAD
+
+            if self._state == READ_PAYLOAD:
+                chunk_len = data_len - start_pos
+                if self._payload_bytes_to_read >= chunk_len:
+                    f_end_pos = data_len
+                    self._payload_bytes_to_read -= chunk_len
+                else:
+                    f_end_pos = start_pos + self._payload_bytes_to_read
+                    self._payload_bytes_to_read = 0
+
+                had_fragments = self._frame_payload_len
+                self._frame_payload_len += f_end_pos - start_pos
+                f_start_pos = start_pos
+                start_pos = f_end_pos
+
+                if self._payload_bytes_to_read != 0:
+                    # If we don't have a complete frame, we need to save the
+                    # data for the next call to feed_data.
+                    self._payload_fragments.append(data_cstr[f_start_pos:f_end_pos])
+                    break
+
+                payload: Union[bytes, bytearray]
+                if had_fragments:
+                    # We have to join the payload fragments get the payload
+                    self._payload_fragments.append(data_cstr[f_start_pos:f_end_pos])
+                    if self._has_mask:
+                        assert self._frame_mask is not None
+                        payload_bytearray = bytearray(b"".join(self._payload_fragments))
+                        websocket_mask(self._frame_mask, payload_bytearray)
+                        payload = payload_bytearray
+                    else:
+                        payload = b"".join(self._payload_fragments)
+                    self._payload_fragments.clear()
+                elif self._has_mask:
+                    assert self._frame_mask is not None
+                    payload_bytearray = data_cstr[f_start_pos:f_end_pos]  # type: ignore[assignment]
+                    if type(payload_bytearray) is not bytearray:  # pragma: no branch
+                        # Cython will do the conversion for us
+                        # but we need to do it for Python and we
+                        # will always get here in Python
+                        payload_bytearray = bytearray(payload_bytearray)
+                    websocket_mask(self._frame_mask, payload_bytearray)
+                    payload = payload_bytearray
+                else:
+                    payload = data_cstr[f_start_pos:f_end_pos]
+
+                self._handle_frame(
+                    self._frame_fin, self._frame_opcode, payload, self._compressed
+                )
+                self._frame_payload_len = 0
+                self._state = READ_HEADER
+
+        # XXX: Cython needs slices to be bounded, so we can't omit the slice end here.
+        self._tail = data_cstr[start_pos:data_len] if start_pos < data_len else b""

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/reader_py.py

@@ -0,0 +1,476 @@
+"""Reader for WebSocket protocol versions 13 and 8."""
+
+import asyncio
+import builtins
+from collections import deque
+from typing import Deque, Final, Optional, Set, Tuple, Union
+
+from ..base_protocol import BaseProtocol
+from ..compression_utils import ZLibDecompressor
+from ..helpers import _EXC_SENTINEL, set_exception
+from ..streams import EofStream
+from .helpers import UNPACK_CLOSE_CODE, UNPACK_LEN3, websocket_mask
+from .models import (
+    WS_DEFLATE_TRAILING,
+    WebSocketError,
+    WSCloseCode,
+    WSMessage,
+    WSMsgType,
+)
+
+ALLOWED_CLOSE_CODES: Final[Set[int]] = {int(i) for i in WSCloseCode}
+
+# States for the reader, used to parse the WebSocket frame
+# integer values are used so they can be cythonized
+READ_HEADER = 1
+READ_PAYLOAD_LENGTH = 2
+READ_PAYLOAD_MASK = 3
+READ_PAYLOAD = 4
+
+WS_MSG_TYPE_BINARY = WSMsgType.BINARY
+WS_MSG_TYPE_TEXT = WSMsgType.TEXT
+
+# WSMsgType values unpacked so they can by cythonized to ints
+OP_CODE_NOT_SET = -1
+OP_CODE_CONTINUATION = WSMsgType.CONTINUATION.value
+OP_CODE_TEXT = WSMsgType.TEXT.value
+OP_CODE_BINARY = WSMsgType.BINARY.value
+OP_CODE_CLOSE = WSMsgType.CLOSE.value
+OP_CODE_PING = WSMsgType.PING.value
+OP_CODE_PONG = WSMsgType.PONG.value
+
+EMPTY_FRAME_ERROR = (True, b"")
+EMPTY_FRAME = (False, b"")
+
+COMPRESSED_NOT_SET = -1
+COMPRESSED_FALSE = 0
+COMPRESSED_TRUE = 1
+
+TUPLE_NEW = tuple.__new__
+
+cython_int = int  # Typed to int in Python, but cython with use a signed int in the pxd
+
+
+class WebSocketDataQueue:
+    """WebSocketDataQueue resumes and pauses an underlying stream.
+
+    It is a destination for WebSocket data.
+    """
+
+    def __init__(
+        self, protocol: BaseProtocol, limit: int, *, loop: asyncio.AbstractEventLoop
+    ) -> None:
+        self._size = 0
+        self._protocol = protocol
+        self._limit = limit * 2
+        self._loop = loop
+        self._eof = False
+        self._waiter: Optional[asyncio.Future[None]] = None
+        self._exception: Union[BaseException, None] = None
+        self._buffer: Deque[Tuple[WSMessage, int]] = deque()
+        self._get_buffer = self._buffer.popleft
+        self._put_buffer = self._buffer.append
+
+    def is_eof(self) -> bool:
+        return self._eof
+
+    def exception(self) -> Optional[BaseException]:
+        return self._exception
+
+    def set_exception(
+        self,
+        exc: BaseException,
+        exc_cause: builtins.BaseException = _EXC_SENTINEL,
+    ) -> None:
+        self._eof = True
+        self._exception = exc
+        if (waiter := self._waiter) is not None:
+            self._waiter = None
+            set_exception(waiter, exc, exc_cause)
+
+    def _release_waiter(self) -> None:
+        if (waiter := self._waiter) is None:
+            return
+        self._waiter = None
+        if not waiter.done():
+            waiter.set_result(None)
+
+    def feed_eof(self) -> None:
+        self._eof = True
+        self._release_waiter()
+        self._exception = None  # Break cyclic references
+
+    def feed_data(self, data: "WSMessage", size: "cython_int") -> None:
+        self._size += size
+        self._put_buffer((data, size))
+        self._release_waiter()
+        if self._size > self._limit and not self._protocol._reading_paused:
+            self._protocol.pause_reading()
+
+    async def read(self) -> WSMessage:
+        if not self._buffer and not self._eof:
+            assert not self._waiter
+            self._waiter = self._loop.create_future()
+            try:
+                await self._waiter
+            except (asyncio.CancelledError, asyncio.TimeoutError):
+                self._waiter = None
+                raise
+        return self._read_from_buffer()
+
+    def _read_from_buffer(self) -> WSMessage:
+        if self._buffer:
+            data, size = self._get_buffer()
+            self._size -= size
+            if self._size < self._limit and self._protocol._reading_paused:
+                self._protocol.resume_reading()
+            return data
+        if self._exception is not None:
+            raise self._exception
+        raise EofStream
+
+
+class WebSocketReader:
+    def __init__(
+        self, queue: WebSocketDataQueue, max_msg_size: int, compress: bool = True
+    ) -> None:
+        self.queue = queue
+        self._max_msg_size = max_msg_size
+
+        self._exc: Optional[Exception] = None
+        self._partial = bytearray()
+        self._state = READ_HEADER
+
+        self._opcode: int = OP_CODE_NOT_SET
+        self._frame_fin = False
+        self._frame_opcode: int = OP_CODE_NOT_SET
+        self._payload_fragments: list[bytes] = []
+        self._frame_payload_len = 0
+
+        self._tail: bytes = b""
+        self._has_mask = False
+        self._frame_mask: Optional[bytes] = None
+        self._payload_bytes_to_read = 0
+        self._payload_len_flag = 0
+        self._compressed: int = COMPRESSED_NOT_SET
+        self._decompressobj: Optional[ZLibDecompressor] = None
+        self._compress = compress
+
+    def feed_eof(self) -> None:
+        self.queue.feed_eof()
+
+    # data can be bytearray on Windows because proactor event loop uses bytearray
+    # and asyncio types this to Union[bytes, bytearray, memoryview] so we need
+    # coerce data to bytes if it is not
+    def feed_data(
+        self, data: Union[bytes, bytearray, memoryview]
+    ) -> Tuple[bool, bytes]:
+        if type(data) is not bytes:
+            data = bytes(data)
+
+        if self._exc is not None:
+            return True, data
+
+        try:
+            self._feed_data(data)
+        except Exception as exc:
+            self._exc = exc
+            set_exception(self.queue, exc)
+            return EMPTY_FRAME_ERROR
+
+        return EMPTY_FRAME
+
+    def _handle_frame(
+        self,
+        fin: bool,
+        opcode: Union[int, cython_int],  # Union intended: Cython pxd uses C int
+        payload: Union[bytes, bytearray],
+        compressed: Union[int, cython_int],  # Union intended: Cython pxd uses C int
+    ) -> None:
+        msg: WSMessage
+        if opcode in {OP_CODE_TEXT, OP_CODE_BINARY, OP_CODE_CONTINUATION}:
+            # load text/binary
+            if not fin:
+                # got partial frame payload
+                if opcode != OP_CODE_CONTINUATION:
+                    self._opcode = opcode
+                self._partial += payload
+                if self._max_msg_size and len(self._partial) >= self._max_msg_size:
+                    raise WebSocketError(
+                        WSCloseCode.MESSAGE_TOO_BIG,
+                        f"Message size {len(self._partial)} "
+                        f"exceeds limit {self._max_msg_size}",
+                    )
+                return
+
+            has_partial = bool(self._partial)
+            if opcode == OP_CODE_CONTINUATION:
+                if self._opcode == OP_CODE_NOT_SET:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Continuation frame for non started message",
+                    )
+                opcode = self._opcode
+                self._opcode = OP_CODE_NOT_SET
+            # previous frame was non finished
+            # we should get continuation opcode
+            elif has_partial:
+                raise WebSocketError(
+                    WSCloseCode.PROTOCOL_ERROR,
+                    "The opcode in non-fin frame is expected "
+                    f"to be zero, got {opcode!r}",
+                )
+
+            assembled_payload: Union[bytes, bytearray]
+            if has_partial:
+                assembled_payload = self._partial + payload
+                self._partial.clear()
+            else:
+                assembled_payload = payload
+
+            if self._max_msg_size and len(assembled_payload) >= self._max_msg_size:
+                raise WebSocketError(
+                    WSCloseCode.MESSAGE_TOO_BIG,
+                    f"Message size {len(assembled_payload)} "
+                    f"exceeds limit {self._max_msg_size}",
+                )
+
+            # Decompress process must to be done after all packets
+            # received.
+            if compressed:
+                if not self._decompressobj:
+                    self._decompressobj = ZLibDecompressor(suppress_deflate_header=True)
+                # XXX: It's possible that the zlib backend (isal is known to
+                # do this, maybe others too?) will return max_length bytes,
+                # but internally buffer more data such that the payload is
+                # >max_length, so we return one extra byte and if we're able
+                # to do that, then the message is too big.
+                payload_merged = self._decompressobj.decompress_sync(
+                    assembled_payload + WS_DEFLATE_TRAILING,
+                    (
+                        self._max_msg_size + 1
+                        if self._max_msg_size
+                        else self._max_msg_size
+                    ),
+                )
+                if self._max_msg_size and len(payload_merged) > self._max_msg_size:
+                    raise WebSocketError(
+                        WSCloseCode.MESSAGE_TOO_BIG,
+                        f"Decompressed message exceeds size limit {self._max_msg_size}",
+                    )
+            elif type(assembled_payload) is bytes:
+                payload_merged = assembled_payload
+            else:
+                payload_merged = bytes(assembled_payload)
+
+            if opcode == OP_CODE_TEXT:
+                try:
+                    text = payload_merged.decode("utf-8")
+                except UnicodeDecodeError as exc:
+                    raise WebSocketError(
+                        WSCloseCode.INVALID_TEXT, "Invalid UTF-8 text message"
+                    ) from exc
+
+                # XXX: The Text and Binary messages here can be a performance
+                # bottleneck, so we use tuple.__new__ to improve performance.
+                # This is not type safe, but many tests should fail in
+                # test_client_ws_functional.py if this is wrong.
+                self.queue.feed_data(
+                    TUPLE_NEW(WSMessage, (WS_MSG_TYPE_TEXT, text, "")),
+                    len(payload_merged),
+                )
+            else:
+                self.queue.feed_data(
+                    TUPLE_NEW(WSMessage, (WS_MSG_TYPE_BINARY, payload_merged, "")),
+                    len(payload_merged),
+                )
+        elif opcode == OP_CODE_CLOSE:
+            if len(payload) >= 2:
+                close_code = UNPACK_CLOSE_CODE(payload[:2])[0]
+                if close_code < 3000 and close_code not in ALLOWED_CLOSE_CODES:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        f"Invalid close code: {close_code}",
+                    )
+                try:
+                    close_message = payload[2:].decode("utf-8")
+                except UnicodeDecodeError as exc:
+                    raise WebSocketError(
+                        WSCloseCode.INVALID_TEXT, "Invalid UTF-8 text message"
+                    ) from exc
+                msg = TUPLE_NEW(WSMessage, (WSMsgType.CLOSE, close_code, close_message))
+            elif payload:
+                raise WebSocketError(
+                    WSCloseCode.PROTOCOL_ERROR,
+                    f"Invalid close frame: {fin} {opcode} {payload!r}",
+                )
+            else:
+                msg = TUPLE_NEW(WSMessage, (WSMsgType.CLOSE, 0, ""))
+
+            self.queue.feed_data(msg, 0)
+        elif opcode == OP_CODE_PING:
+            msg = TUPLE_NEW(WSMessage, (WSMsgType.PING, payload, ""))
+            self.queue.feed_data(msg, len(payload))
+        elif opcode == OP_CODE_PONG:
+            msg = TUPLE_NEW(WSMessage, (WSMsgType.PONG, payload, ""))
+            self.queue.feed_data(msg, len(payload))
+        else:
+            raise WebSocketError(
+                WSCloseCode.PROTOCOL_ERROR, f"Unexpected opcode={opcode!r}"
+            )
+
+    def _feed_data(self, data: bytes) -> None:
+        """Return the next frame from the socket."""
+        if self._tail:
+            data, self._tail = self._tail + data, b""
+
+        start_pos: int = 0
+        data_len = len(data)
+        data_cstr = data
+
+        while True:
+            # read header
+            if self._state == READ_HEADER:
+                if data_len - start_pos < 2:
+                    break
+                first_byte = data_cstr[start_pos]
+                second_byte = data_cstr[start_pos + 1]
+                start_pos += 2
+
+                fin = (first_byte >> 7) & 1
+                rsv1 = (first_byte >> 6) & 1
+                rsv2 = (first_byte >> 5) & 1
+                rsv3 = (first_byte >> 4) & 1
+                opcode = first_byte & 0xF
+
+                # frame-fin = %x0 ; more frames of this message follow
+                #           / %x1 ; final frame of this message
+                # frame-rsv1 = %x0 ;
+                #    1 bit, MUST be 0 unless negotiated otherwise
+                # frame-rsv2 = %x0 ;
+                #    1 bit, MUST be 0 unless negotiated otherwise
+                # frame-rsv3 = %x0 ;
+                #    1 bit, MUST be 0 unless negotiated otherwise
+                #
+                # Remove rsv1 from this test for deflate development
+                if rsv2 or rsv3 or (rsv1 and not self._compress):
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Received frame with non-zero reserved bits",
+                    )
+
+                if opcode > 0x7 and fin == 0:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Received fragmented control frame",
+                    )
+
+                has_mask = (second_byte >> 7) & 1
+                length = second_byte & 0x7F
+
+                # Control frames MUST have a payload
+                # length of 125 bytes or less
+                if opcode > 0x7 and length > 125:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Control frame payload cannot be larger than 125 bytes",
+                    )
+
+                # Set compress status if last package is FIN
+                # OR set compress status if this is first fragment
+                # Raise error if not first fragment with rsv1 = 0x1
+                if self._frame_fin or self._compressed == COMPRESSED_NOT_SET:
+                    self._compressed = COMPRESSED_TRUE if rsv1 else COMPRESSED_FALSE
+                elif rsv1:
+                    raise WebSocketError(
+                        WSCloseCode.PROTOCOL_ERROR,
+                        "Received frame with non-zero reserved bits",
+                    )
+
+                self._frame_fin = bool(fin)
+                self._frame_opcode = opcode
+                self._has_mask = bool(has_mask)
+                self._payload_len_flag = length
+                self._state = READ_PAYLOAD_LENGTH
+
+            # read payload length
+            if self._state == READ_PAYLOAD_LENGTH:
+                len_flag = self._payload_len_flag
+                if len_flag == 126:
+                    if data_len - start_pos < 2:
+                        break
+                    first_byte = data_cstr[start_pos]
+                    second_byte = data_cstr[start_pos + 1]
+                    start_pos += 2
+                    self._payload_bytes_to_read = first_byte << 8 | second_byte
+                elif len_flag > 126:
+                    if data_len - start_pos < 8:
+                        break
+                    self._payload_bytes_to_read = UNPACK_LEN3(data, start_pos)[0]
+                    start_pos += 8
+                else:
+                    self._payload_bytes_to_read = len_flag
+
+                self._state = READ_PAYLOAD_MASK if self._has_mask else READ_PAYLOAD
+
+            # read payload mask
+            if self._state == READ_PAYLOAD_MASK:
+                if data_len - start_pos < 4:
+                    break
+                self._frame_mask = data_cstr[start_pos : start_pos + 4]
+                start_pos += 4
+                self._state = READ_PAYLOAD
+
+            if self._state == READ_PAYLOAD:
+                chunk_len = data_len - start_pos
+                if self._payload_bytes_to_read >= chunk_len:
+                    f_end_pos = data_len
+                    self._payload_bytes_to_read -= chunk_len
+                else:
+                    f_end_pos = start_pos + self._payload_bytes_to_read
+                    self._payload_bytes_to_read = 0
+
+                had_fragments = self._frame_payload_len
+                self._frame_payload_len += f_end_pos - start_pos
+                f_start_pos = start_pos
+                start_pos = f_end_pos
+
+                if self._payload_bytes_to_read != 0:
+                    # If we don't have a complete frame, we need to save the
+                    # data for the next call to feed_data.
+                    self._payload_fragments.append(data_cstr[f_start_pos:f_end_pos])
+                    break
+
+                payload: Union[bytes, bytearray]
+                if had_fragments:
+                    # We have to join the payload fragments get the payload
+                    self._payload_fragments.append(data_cstr[f_start_pos:f_end_pos])
+                    if self._has_mask:
+                        assert self._frame_mask is not None
+                        payload_bytearray = bytearray(b"".join(self._payload_fragments))
+                        websocket_mask(self._frame_mask, payload_bytearray)
+                        payload = payload_bytearray
+                    else:
+                        payload = b"".join(self._payload_fragments)
+                    self._payload_fragments.clear()
+                elif self._has_mask:
+                    assert self._frame_mask is not None
+                    payload_bytearray = data_cstr[f_start_pos:f_end_pos]  # type: ignore[assignment]
+                    if type(payload_bytearray) is not bytearray:  # pragma: no branch
+                        # Cython will do the conversion for us
+                        # but we need to do it for Python and we
+                        # will always get here in Python
+                        payload_bytearray = bytearray(payload_bytearray)
+                    websocket_mask(self._frame_mask, payload_bytearray)
+                    payload = payload_bytearray
+                else:
+                    payload = data_cstr[f_start_pos:f_end_pos]
+
+                self._handle_frame(
+                    self._frame_fin, self._frame_opcode, payload, self._compressed
+                )
+                self._frame_payload_len = 0
+                self._state = READ_HEADER
+
+        # XXX: Cython needs slices to be bounded, so we can't omit the slice end here.
+        self._tail = data_cstr[start_pos:data_len] if start_pos < data_len else b""

backend_service/venv/lib/python3.13/site-packages/aiohttp/_websocket/writer.py

@@ -0,0 +1,262 @@
+"""WebSocket protocol versions 13 and 8."""
+
+import asyncio
+import random
+import sys
+from functools import partial
+from typing import Final, Optional, Set, Union
+
+from ..base_protocol import BaseProtocol
+from ..client_exceptions import ClientConnectionResetError
+from ..compression_utils import ZLibBackend, ZLibCompressor
+from .helpers import (
+    MASK_LEN,
+    MSG_SIZE,
+    PACK_CLOSE_CODE,
+    PACK_LEN1,
+    PACK_LEN2,
+    PACK_LEN3,
+    PACK_RANDBITS,
+    websocket_mask,
+)
+from .models import WS_DEFLATE_TRAILING, WSMsgType
+
+DEFAULT_LIMIT: Final[int] = 2**16
+
+# WebSocket opcode boundary: opcodes 0-7 are data frames, 8-15 are control frames
+# Control frames (ping, pong, close) are never compressed
+WS_CONTROL_FRAME_OPCODE: Final[int] = 8
+
+# For websockets, keeping latency low is extremely important as implementations
+# generally expect to be able to send and receive messages quickly. We use a
+# larger chunk size to reduce the number of executor calls and avoid task
+# creation overhead, since both are significant sources of latency when chunks
+# are small. A size of 16KiB was chosen as a balance between avoiding task
+# overhead and not blocking the event loop too long with synchronous compression.
+
+WEBSOCKET_MAX_SYNC_CHUNK_SIZE = 16 * 1024
+
+
+class WebSocketWriter:
+    """WebSocket writer.
+
+    The writer is responsible for sending messages to the client. It is
+    created by the protocol when a connection is established. The writer
+    should avoid implementing any application logic and should only be
+    concerned with the low-level details of the WebSocket protocol.
+    """
+
+    def __init__(
+        self,
+        protocol: BaseProtocol,
+        transport: asyncio.Transport,
+        *,
+        use_mask: bool = False,
+        limit: int = DEFAULT_LIMIT,
+        random: random.Random = random.Random(),
+        compress: int = 0,
+        notakeover: bool = False,
+    ) -> None:
+        """Initialize a WebSocket writer."""
+        self.protocol = protocol
+        self.transport = transport
+        self.use_mask = use_mask
+        self.get_random_bits = partial(random.getrandbits, 32)
+        self.compress = compress
+        self.notakeover = notakeover
+        self._closing = False
+        self._limit = limit
+        self._output_size = 0
+        self._compressobj: Optional[ZLibCompressor] = None
+        self._send_lock = asyncio.Lock()
+        self._background_tasks: Set[asyncio.Task[None]] = set()
+
+    async def send_frame(
+        self, message: bytes, opcode: int, compress: Optional[int] = None
+    ) -> None:
+        """Send a frame over the websocket with message as its payload."""
+        if self._closing and not (opcode & WSMsgType.CLOSE):
+            raise ClientConnectionResetError("Cannot write to closing transport")
+
+        if not (compress or self.compress) or opcode >= WS_CONTROL_FRAME_OPCODE:
+            # Non-compressed frames don't need lock or shield
+            self._write_websocket_frame(message, opcode, 0)
+        elif len(message) <= WEBSOCKET_MAX_SYNC_CHUNK_SIZE:
+            # Small compressed payloads - compress synchronously in event loop
+            # We need the lock even though sync compression has no await points.
+            # This prevents small frames from interleaving with large frames that
+            # compress in the executor, avoiding compressor state corruption.
+            async with self._send_lock:
+                self._send_compressed_frame_sync(message, opcode, compress)
+        else:
+            # Large compressed frames need shield to prevent corruption
+            # For large compressed frames, the entire compress+send
+            # operation must be atomic. If cancelled after compression but
+            # before send, the compressor state would be advanced but data
+            # not sent, corrupting subsequent frames.
+            # Create a task to shield from cancellation
+            # The lock is acquired inside the shielded task so the entire
+            # operation (lock + compress + send) completes atomically.
+            # Use eager_start on Python 3.12+ to avoid scheduling overhead
+            loop = asyncio.get_running_loop()
+            coro = self._send_compressed_frame_async_locked(message, opcode, compress)
+            if sys.version_info >= (3, 12):
+                send_task = asyncio.Task(coro, loop=loop, eager_start=True)
+            else:
+                send_task = loop.create_task(coro)
+            # Keep a strong reference to prevent garbage collection
+            self._background_tasks.add(send_task)
+            send_task.add_done_callback(self._background_tasks.discard)
+            await asyncio.shield(send_task)
+
+        # It is safe to return control to the event loop when using compression
+        # after this point as we have already sent or buffered all the data.
+        # Once we have written output_size up to the limit, we call the
+        # drain helper which waits for the transport to be ready to accept
+        # more data. This is a flow control mechanism to prevent the buffer
+        # from growing too large. The drain helper will return right away
+        # if the writer is not paused.
+        if self._output_size > self._limit:
+            self._output_size = 0
+            if self.protocol._paused:
+                await self.protocol._drain_helper()
+
+    def _write_websocket_frame(self, message: bytes, opcode: int, rsv: int) -> None:
+        """
+        Write a websocket frame to the transport.
+
+        This method handles frame header construction, masking, and writing to transport.
+        It does not handle compression or flow control - those are the responsibility
+        of the caller.
+        """
+        msg_length = len(message)
+
+        use_mask = self.use_mask
+        mask_bit = 0x80 if use_mask else 0
+
+        # Depending on the message length, the header is assembled differently.
+        # The first byte is reserved for the opcode and the RSV bits.
+        first_byte = 0x80 | rsv | opcode
+        if msg_length < 126:
+            header = PACK_LEN1(first_byte, msg_length | mask_bit)
+            header_len = 2
+        elif msg_length < 65536:
+            header = PACK_LEN2(first_byte, 126 | mask_bit, msg_length)
+            header_len = 4
+        else:
+            header = PACK_LEN3(first_byte, 127 | mask_bit, msg_length)
+            header_len = 10
+
+        if self.transport.is_closing():
+            raise ClientConnectionResetError("Cannot write to closing transport")
+
+        # https://datatracker.ietf.org/doc/html/rfc6455#section-5.3
+        # If we are using a mask, we need to generate it randomly
+        # and apply it to the message before sending it. A mask is
+        # a 32-bit value that is applied to the message using a
+        # bitwise XOR operation. It is used to prevent certain types
+        # of attacks on the websocket protocol. The mask is only used
+        # when aiohttp is acting as a client. Servers do not use a mask.
+        if use_mask:
+            mask = PACK_RANDBITS(self.get_random_bits())
+            message = bytearray(message)
+            websocket_mask(mask, message)
+            self.transport.write(header + mask + message)
+            self._output_size += MASK_LEN
+        elif msg_length > MSG_SIZE:
+            self.transport.write(header)
+            self.transport.write(message)
+        else:
+            self.transport.write(header + message)
+
+        self._output_size += header_len + msg_length
+
+    def _get_compressor(self, compress: Optional[int]) -> ZLibCompressor:
+        """Get or create a compressor object for the given compression level."""
+        if compress:
+            # Do not set self._compress if compressing is for this frame
+            return ZLibCompressor(
+                level=ZLibBackend.Z_BEST_SPEED,
+                wbits=-compress,
+                max_sync_chunk_size=WEBSOCKET_MAX_SYNC_CHUNK_SIZE,
+            )
+        if not self._compressobj:
+            self._compressobj = ZLibCompressor(
+                level=ZLibBackend.Z_BEST_SPEED,
+                wbits=-self.compress,
+                max_sync_chunk_size=WEBSOCKET_MAX_SYNC_CHUNK_SIZE,
+            )
+        return self._compressobj
+
+    def _send_compressed_frame_sync(
+        self, message: bytes, opcode: int, compress: Optional[int]
+    ) -> None:
+        """
+        Synchronous send for small compressed frames.
+
+        This is used for small compressed payloads that compress synchronously in the event loop.
+        Since there are no await points, this is inherently cancellation-safe.
+        """
+        # RSV are the reserved bits in the frame header. They are used to
+        # indicate that the frame is using an extension.
+        # https://datatracker.ietf.org/doc/html/rfc6455#section-5.2
+        compressobj = self._get_compressor(compress)
+        # (0x40) RSV1 is set for compressed frames
+        # https://datatracker.ietf.org/doc/html/rfc7692#section-7.2.3.1
+        self._write_websocket_frame(
+            (
+                compressobj.compress_sync(message)
+                + compressobj.flush(
+                    ZLibBackend.Z_FULL_FLUSH
+                    if self.notakeover
+                    else ZLibBackend.Z_SYNC_FLUSH
+                )
+            ).removesuffix(WS_DEFLATE_TRAILING),
+            opcode,
+            0x40,
+        )
+
+    async def _send_compressed_frame_async_locked(
+        self, message: bytes, opcode: int, compress: Optional[int]
+    ) -> None:
+        """
+        Async send for large compressed frames with lock.
+
+        Acquires the lock and compresses large payloads asynchronously in
+        the executor. The lock is held for the entire operation to ensure
+        the compressor state is not corrupted by concurrent sends.
+
+        MUST be run shielded from cancellation. If cancelled after
+        compression but before sending, the compressor state would be
+        advanced but data not sent, corrupting subsequent frames.
+        """
+        async with self._send_lock:
+            # RSV are the reserved bits in the frame header. They are used to
+            # indicate that the frame is using an extension.
+            # https://datatracker.ietf.org/doc/html/rfc6455#section-5.2
+            compressobj = self._get_compressor(compress)
+            # (0x40) RSV1 is set for compressed frames
+            # https://datatracker.ietf.org/doc/html/rfc7692#section-7.2.3.1
+            self._write_websocket_frame(
+                (
+                    await compressobj.compress(message)
+                    + compressobj.flush(
+                        ZLibBackend.Z_FULL_FLUSH
+                        if self.notakeover
+                        else ZLibBackend.Z_SYNC_FLUSH
+                    )
+                ).removesuffix(WS_DEFLATE_TRAILING),
+                opcode,
+                0x40,
+            )
+
+    async def close(self, code: int = 1000, message: Union[bytes, str] = b"") -> None:
+        """Close the websocket, sending the specified code and message."""
+        if isinstance(message, str):
+            message = message.encode("utf-8")
+        try:
+            await self.send_frame(
+                PACK_CLOSE_CODE(code) + message, opcode=WSMsgType.CLOSE
+            )
+        finally:
+            self._closing = True

backend_service/venv/lib/python3.13/site-packages/aiohttp/abc.py

@@ -0,0 +1,268 @@
+import asyncio
+import logging
+import socket
+from abc import ABC, abstractmethod
+from collections.abc import Sized
+from http.cookies import BaseCookie, Morsel
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Awaitable,
+    Callable,
+    Dict,
+    Generator,
+    Iterable,
+    List,
+    Optional,
+    Sequence,
+    Tuple,
+    TypedDict,
+    Union,
+)
+
+from multidict import CIMultiDict
+from yarl import URL
+
+from ._cookie_helpers import parse_set_cookie_headers
+from .typedefs import LooseCookies
+
+if TYPE_CHECKING:
+    from .web_app import Application
+    from .web_exceptions import HTTPException
+    from .web_request import BaseRequest, Request
+    from .web_response import StreamResponse
+else:
+    BaseRequest = Request = Application = StreamResponse = None
+    HTTPException = None
+
+
+class AbstractRouter(ABC):
+    def __init__(self) -> None:
+        self._frozen = False
+
+    def post_init(self, app: Application) -> None:
+        """Post init stage.
+
+        Not an abstract method for sake of backward compatibility,
+        but if the router wants to be aware of the application
+        it can override this.
+        """
+
+    @property
+    def frozen(self) -> bool:
+        return self._frozen
+
+    def freeze(self) -> None:
+        """Freeze router."""
+        self._frozen = True
+
+    @abstractmethod
+    async def resolve(self, request: Request) -> "AbstractMatchInfo":
+        """Return MATCH_INFO for given request"""
+
+
+class AbstractMatchInfo(ABC):
+
+    __slots__ = ()
+
+    @property  # pragma: no branch
+    @abstractmethod
+    def handler(self) -> Callable[[Request], Awaitable[StreamResponse]]:
+        """Execute matched request handler"""
+
+    @property
+    @abstractmethod
+    def expect_handler(
+        self,
+    ) -> Callable[[Request], Awaitable[Optional[StreamResponse]]]:
+        """Expect handler for 100-continue processing"""
+
+    @property  # pragma: no branch
+    @abstractmethod
+    def http_exception(self) -> Optional[HTTPException]:
+        """HTTPException instance raised on router's resolving, or None"""
+
+    @abstractmethod  # pragma: no branch
+    def get_info(self) -> Dict[str, Any]:
+        """Return a dict with additional info useful for introspection"""
+
+    @property  # pragma: no branch
+    @abstractmethod
+    def apps(self) -> Tuple[Application, ...]:
+        """Stack of nested applications.
+
+        Top level application is left-most element.
+
+        """
+
+    @abstractmethod
+    def add_app(self, app: Application) -> None:
+        """Add application to the nested apps stack."""
+
+    @abstractmethod
+    def freeze(self) -> None:
+        """Freeze the match info.
+
+        The method is called after route resolution.
+
+        After the call .add_app() is forbidden.
+
+        """
+
+
+class AbstractView(ABC):
+    """Abstract class based view."""
+
+    def __init__(self, request: Request) -> None:
+        self._request = request
+
+    @property
+    def request(self) -> Request:
+        """Request instance."""
+        return self._request
+
+    @abstractmethod
+    def __await__(self) -> Generator[None, None, StreamResponse]:
+        """Execute the view handler."""
+
+
+class ResolveResult(TypedDict):
+    """Resolve result.
+
+    This is the result returned from an AbstractResolver's
+    resolve method.
+
+    :param hostname: The hostname that was provided.
+    :param host: The IP address that was resolved.
+    :param port: The port that was resolved.
+    :param family: The address family that was resolved.
+    :param proto: The protocol that was resolved.
+    :param flags: The flags that were resolved.
+    """
+
+    hostname: str
+    host: str
+    port: int
+    family: int
+    proto: int
+    flags: int
+
+
+class AbstractResolver(ABC):
+    """Abstract DNS resolver."""
+
+    @abstractmethod
+    async def resolve(
+        self, host: str, port: int = 0, family: socket.AddressFamily = socket.AF_INET
+    ) -> List[ResolveResult]:
+        """Return IP address for given hostname"""
+
+    @abstractmethod
+    async def close(self) -> None:
+        """Release resolver"""
+
+
+if TYPE_CHECKING:
+    IterableBase = Iterable[Morsel[str]]
+else:
+    IterableBase = Iterable
+
+
+ClearCookiePredicate = Callable[["Morsel[str]"], bool]
+
+
+class AbstractCookieJar(Sized, IterableBase):
+    """Abstract Cookie Jar."""
+
+    def __init__(self, *, loop: Optional[asyncio.AbstractEventLoop] = None) -> None:
+        self._loop = loop or asyncio.get_running_loop()
+
+    @property
+    @abstractmethod
+    def quote_cookie(self) -> bool:
+        """Return True if cookies should be quoted."""
+
+    @abstractmethod
+    def clear(self, predicate: Optional[ClearCookiePredicate] = None) -> None:
+        """Clear all cookies if no predicate is passed."""
+
+    @abstractmethod
+    def clear_domain(self, domain: str) -> None:
+        """Clear all cookies for domain and all subdomains."""
+
+    @abstractmethod
+    def update_cookies(self, cookies: LooseCookies, response_url: URL = URL()) -> None:
+        """Update cookies."""
+
+    def update_cookies_from_headers(
+        self, headers: Sequence[str], response_url: URL
+    ) -> None:
+        """Update cookies from raw Set-Cookie headers."""
+        if headers and (cookies_to_update := parse_set_cookie_headers(headers)):
+            self.update_cookies(cookies_to_update, response_url)
+
+    @abstractmethod
+    def filter_cookies(self, request_url: URL) -> "BaseCookie[str]":
+        """Return the jar's cookies filtered by their attributes."""
+
+
+class AbstractStreamWriter(ABC):
+    """Abstract stream writer."""
+
+    buffer_size: int = 0
+    output_size: int = 0
+    length: Optional[int] = 0
+
+    @abstractmethod
+    async def write(self, chunk: Union[bytes, bytearray, memoryview]) -> None:
+        """Write chunk into stream."""
+
+    @abstractmethod
+    async def write_eof(self, chunk: bytes = b"") -> None:
+        """Write last chunk."""
+
+    @abstractmethod
+    async def drain(self) -> None:
+        """Flush the write buffer."""
+
+    @abstractmethod
+    def enable_compression(
+        self, encoding: str = "deflate", strategy: Optional[int] = None
+    ) -> None:
+        """Enable HTTP body compression"""
+
+    @abstractmethod
+    def enable_chunking(self) -> None:
+        """Enable HTTP chunked mode"""
+
+    @abstractmethod
+    async def write_headers(
+        self, status_line: str, headers: "CIMultiDict[str]"
+    ) -> None:
+        """Write HTTP headers"""
+
+    def send_headers(self) -> None:
+        """Force sending buffered headers if not already sent.
+
+        Required only if write_headers() buffers headers instead of sending immediately.
+        For backwards compatibility, this method does nothing by default.
+        """
+
+
+class AbstractAccessLogger(ABC):
+    """Abstract writer to access log."""
+
+    __slots__ = ("logger", "log_format")
+
+    def __init__(self, logger: logging.Logger, log_format: str) -> None:
+        self.logger = logger
+        self.log_format = log_format
+
+    @abstractmethod
+    def log(self, request: BaseRequest, response: StreamResponse, time: float) -> None:
+        """Emit log to logger."""
+
+    @property
+    def enabled(self) -> bool:
+        """Check if logger is enabled."""
+        return True

backend_service/venv/lib/python3.13/site-packages/aiohttp/base_protocol.py

@@ -0,0 +1,100 @@
+import asyncio
+from typing import Optional, cast
+
+from .client_exceptions import ClientConnectionResetError
+from .helpers import set_exception
+from .tcp_helpers import tcp_nodelay
+
+
+class BaseProtocol(asyncio.Protocol):
+    __slots__ = (
+        "_loop",
+        "_paused",
+        "_drain_waiter",
+        "_connection_lost",
+        "_reading_paused",
+        "transport",
+    )
+
+    def __init__(self, loop: asyncio.AbstractEventLoop) -> None:
+        self._loop: asyncio.AbstractEventLoop = loop
+        self._paused = False
+        self._drain_waiter: Optional[asyncio.Future[None]] = None
+        self._reading_paused = False
+
+        self.transport: Optional[asyncio.Transport] = None
+
+    @property
+    def connected(self) -> bool:
+        """Return True if the connection is open."""
+        return self.transport is not None
+
+    @property
+    def writing_paused(self) -> bool:
+        return self._paused
+
+    def pause_writing(self) -> None:
+        assert not self._paused
+        self._paused = True
+
+    def resume_writing(self) -> None:
+        assert self._paused
+        self._paused = False
+
+        waiter = self._drain_waiter
+        if waiter is not None:
+            self._drain_waiter = None
+            if not waiter.done():
+                waiter.set_result(None)
+
+    def pause_reading(self) -> None:
+        if not self._reading_paused and self.transport is not None:
+            try:
+                self.transport.pause_reading()
+            except (AttributeError, NotImplementedError, RuntimeError):
+                pass
+            self._reading_paused = True
+
+    def resume_reading(self) -> None:
+        if self._reading_paused and self.transport is not None:
+            try:
+                self.transport.resume_reading()
+            except (AttributeError, NotImplementedError, RuntimeError):
+                pass
+            self._reading_paused = False
+
+    def connection_made(self, transport: asyncio.BaseTransport) -> None:
+        tr = cast(asyncio.Transport, transport)
+        tcp_nodelay(tr, True)
+        self.transport = tr
+
+    def connection_lost(self, exc: Optional[BaseException]) -> None:
+        # Wake up the writer if currently paused.
+        self.transport = None
+        if not self._paused:
+            return
+        waiter = self._drain_waiter
+        if waiter is None:
+            return
+        self._drain_waiter = None
+        if waiter.done():
+            return
+        if exc is None:
+            waiter.set_result(None)
+        else:
+            set_exception(
+                waiter,
+                ConnectionError("Connection lost"),
+                exc,
+            )
+
+    async def _drain_helper(self) -> None:
+        if self.transport is None:
+            raise ClientConnectionResetError("Connection lost")
+        if not self._paused:
+            return
+        waiter = self._drain_waiter
+        if waiter is None:
+            waiter = self._loop.create_future()
+            self._drain_waiter = waiter
+        await asyncio.shield(waiter)

backend_service/venv/lib/python3.13/site-packages/aiohttp/client_exceptions.py

@@ -0,0 +1,421 @@
+"""HTTP related errors."""
+
+import asyncio
+import warnings
+from typing import TYPE_CHECKING, Optional, Tuple, Union
+
+from multidict import MultiMapping
+
+from .typedefs import StrOrURL
+
+if TYPE_CHECKING:
+    import ssl
+
+    SSLContext = ssl.SSLContext
+else:
+    try:
+        import ssl
+
+        SSLContext = ssl.SSLContext
+    except ImportError:  # pragma: no cover
+        ssl = SSLContext = None  # type: ignore[assignment]
+
+if TYPE_CHECKING:
+    from .client_reqrep import ClientResponse, ConnectionKey, Fingerprint, RequestInfo
+    from .http_parser import RawResponseMessage
+else:
+    RequestInfo = ClientResponse = ConnectionKey = RawResponseMessage = None
+
+__all__ = (
+    "ClientError",
+    "ClientConnectionError",
+    "ClientConnectionResetError",
+    "ClientOSError",
+    "ClientConnectorError",
+    "ClientProxyConnectionError",
+    "ClientSSLError",
+    "ClientConnectorDNSError",
+    "ClientConnectorSSLError",
+    "ClientConnectorCertificateError",
+    "ConnectionTimeoutError",
+    "SocketTimeoutError",
+    "ServerConnectionError",
+    "ServerTimeoutError",
+    "ServerDisconnectedError",
+    "ServerFingerprintMismatch",
+    "ClientResponseError",
+    "ClientHttpProxyError",
+    "WSServerHandshakeError",
+    "ContentTypeError",
+    "ClientPayloadError",
+    "InvalidURL",
+    "InvalidUrlClientError",
+    "RedirectClientError",
+    "NonHttpUrlClientError",
+    "InvalidUrlRedirectClientError",
+    "NonHttpUrlRedirectClientError",
+    "WSMessageTypeError",
+)
+
+
+class ClientError(Exception):
+    """Base class for client connection errors."""
+
+
+class ClientResponseError(ClientError):
+    """Base class for exceptions that occur after getting a response.
+
+    request_info: An instance of RequestInfo.
+    history: A sequence of responses, if redirects occurred.
+    status: HTTP status code.
+    message: Error message.
+    headers: Response headers.
+    """
+
+    def __init__(
+        self,
+        request_info: RequestInfo,
+        history: Tuple[ClientResponse, ...],
+        *,
+        code: Optional[int] = None,
+        status: Optional[int] = None,
+        message: str = "",
+        headers: Optional[MultiMapping[str]] = None,
+    ) -> None:
+        self.request_info = request_info
+        if code is not None:
+            if status is not None:
+                raise ValueError(
+                    "Both code and status arguments are provided; "
+                    "code is deprecated, use status instead"
+                )
+            warnings.warn(
+                "code argument is deprecated, use status instead",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+        if status is not None:
+            self.status = status
+        elif code is not None:
+            self.status = code
+        else:
+            self.status = 0
+        self.message = message
+        self.headers = headers
+        self.history = history
+        self.args = (request_info, history)
+
+    def __str__(self) -> str:
+        return "{}, message={!r}, url={!r}".format(
+            self.status,
+            self.message,
+            str(self.request_info.real_url),
+        )
+
+    def __repr__(self) -> str:
+        args = f"{self.request_info!r}, {self.history!r}"
+        if self.status != 0:
+            args += f", status={self.status!r}"
+        if self.message != "":
+            args += f", message={self.message!r}"
+        if self.headers is not None:
+            args += f", headers={self.headers!r}"
+        return f"{type(self).__name__}({args})"
+
+    @property
+    def code(self) -> int:
+        warnings.warn(
+            "code property is deprecated, use status instead",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return self.status
+
+    @code.setter
+    def code(self, value: int) -> None:
+        warnings.warn(
+            "code property is deprecated, use status instead",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        self.status = value
+
+
+class ContentTypeError(ClientResponseError):
+    """ContentType found is not valid."""
+
+
+class WSServerHandshakeError(ClientResponseError):
+    """websocket server handshake error."""
+
+
+class ClientHttpProxyError(ClientResponseError):
+    """HTTP proxy error.
+
+    Raised in :class:`aiohttp.connector.TCPConnector` if
+    proxy responds with status other than ``200 OK``
+    on ``CONNECT`` request.
+    """
+
+
+class TooManyRedirects(ClientResponseError):
+    """Client was redirected too many times."""
+
+
+class ClientConnectionError(ClientError):
+    """Base class for client socket errors."""
+
+
+class ClientConnectionResetError(ClientConnectionError, ConnectionResetError):
+    """ConnectionResetError"""
+
+
+class ClientOSError(ClientConnectionError, OSError):
+    """OSError error."""
+
+
+class ClientConnectorError(ClientOSError):
+    """Client connector error.
+
+    Raised in :class:`aiohttp.connector.TCPConnector` if
+        a connection can not be established.
+    """
+
+    def __init__(self, connection_key: ConnectionKey, os_error: OSError) -> None:
+        self._conn_key = connection_key
+        self._os_error = os_error
+        super().__init__(os_error.errno, os_error.strerror)
+        self.args = (connection_key, os_error)
+
+    @property
+    def os_error(self) -> OSError:
+        return self._os_error
+
+    @property
+    def host(self) -> str:
+        return self._conn_key.host
+
+    @property
+    def port(self) -> Optional[int]:
+        return self._conn_key.port
+
+    @property
+    def ssl(self) -> Union[SSLContext, bool, "Fingerprint"]:
+        return self._conn_key.ssl
+
+    def __str__(self) -> str:
+        return "Cannot connect to host {0.host}:{0.port} ssl:{1} [{2}]".format(
+            self, "default" if self.ssl is True else self.ssl, self.strerror
+        )
+
+    # OSError.__reduce__ does too much black magick
+    __reduce__ = BaseException.__reduce__
+
+
+class ClientConnectorDNSError(ClientConnectorError):
+    """DNS resolution failed during client connection.
+
+    Raised in :class:`aiohttp.connector.TCPConnector` if
+        DNS resolution fails.
+    """
+
+
+class ClientProxyConnectionError(ClientConnectorError):
+    """Proxy connection error.
+
+    Raised in :class:`aiohttp.connector.TCPConnector` if
+        connection to proxy can not be established.
+    """
+
+
+class UnixClientConnectorError(ClientConnectorError):
+    """Unix connector error.
+
+    Raised in :py:class:`aiohttp.connector.UnixConnector`
+    if connection to unix socket can not be established.
+    """
+
+    def __init__(
+        self, path: str, connection_key: ConnectionKey, os_error: OSError
+    ) -> None:
+        self._path = path
+        super().__init__(connection_key, os_error)
+
+    @property
+    def path(self) -> str:
+        return self._path
+
+    def __str__(self) -> str:
+        return "Cannot connect to unix socket {0.path} ssl:{1} [{2}]".format(
+            self, "default" if self.ssl is True else self.ssl, self.strerror
+        )
+
+
+class ServerConnectionError(ClientConnectionError):
+    """Server connection errors."""
+
+
+class ServerDisconnectedError(ServerConnectionError):
+    """Server disconnected."""
+
+    def __init__(self, message: Union[RawResponseMessage, str, None] = None) -> None:
+        if message is None:
+            message = "Server disconnected"
+
+        self.args = (message,)
+        self.message = message
+
+
+class ServerTimeoutError(ServerConnectionError, asyncio.TimeoutError):
+    """Server timeout error."""
+
+
+class ConnectionTimeoutError(ServerTimeoutError):
+    """Connection timeout error."""
+
+
+class SocketTimeoutError(ServerTimeoutError):
+    """Socket timeout error."""
+
+
+class ServerFingerprintMismatch(ServerConnectionError):
+    """SSL certificate does not match expected fingerprint."""
+
+    def __init__(self, expected: bytes, got: bytes, host: str, port: int) -> None:
+        self.expected = expected
+        self.got = got
+        self.host = host
+        self.port = port
+        self.args = (expected, got, host, port)
+
+    def __repr__(self) -> str:
+        return "<{} expected={!r} got={!r} host={!r} port={!r}>".format(
+            self.__class__.__name__, self.expected, self.got, self.host, self.port
+        )
+
+
+class ClientPayloadError(ClientError):
+    """Response payload error."""
+
+
+class InvalidURL(ClientError, ValueError):
+    """Invalid URL.
+
+    URL used for fetching is malformed, e.g. it doesn't contains host
+    part.
+    """
+
+    # Derive from ValueError for backward compatibility
+
+    def __init__(self, url: StrOrURL, description: Union[str, None] = None) -> None:
+        # The type of url is not yarl.URL because the exception can be raised
+        # on URL(url) call
+        self._url = url
+        self._description = description
+
+        if description:
+            super().__init__(url, description)
+        else:
+            super().__init__(url)
+
+    @property
+    def url(self) -> StrOrURL:
+        return self._url
+
+    @property
+    def description(self) -> "str | None":
+        return self._description
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__} {self}>"
+
+    def __str__(self) -> str:
+        if self._description:
+            return f"{self._url} - {self._description}"
+        return str(self._url)
+
+
+class InvalidUrlClientError(InvalidURL):
+    """Invalid URL client error."""
+
+
+class RedirectClientError(ClientError):
+    """Client redirect error."""
+
+
+class NonHttpUrlClientError(ClientError):
+    """Non http URL client error."""
+
+
+class InvalidUrlRedirectClientError(InvalidUrlClientError, RedirectClientError):
+    """Invalid URL redirect client error."""
+
+
+class NonHttpUrlRedirectClientError(NonHttpUrlClientError, RedirectClientError):
+    """Non http URL redirect client error."""
+
+
+class ClientSSLError(ClientConnectorError):
+    """Base error for ssl.*Errors."""
+
+
+if ssl is not None:
+    cert_errors = (ssl.CertificateError,)
+    cert_errors_bases = (
+        ClientSSLError,
+        ssl.CertificateError,
+    )
+
+    ssl_errors = (ssl.SSLError,)
+    ssl_error_bases = (ClientSSLError, ssl.SSLError)
+else:  # pragma: no cover
+    cert_errors = tuple()
+    cert_errors_bases = (
+        ClientSSLError,
+        ValueError,
+    )
+
+    ssl_errors = tuple()
+    ssl_error_bases = (ClientSSLError,)
+
+
+class ClientConnectorSSLError(*ssl_error_bases):  # type: ignore[misc]
+    """Response ssl error."""
+
+
+class ClientConnectorCertificateError(*cert_errors_bases):  # type: ignore[misc]
+    """Response certificate error."""
+
+    def __init__(
+        self, connection_key: ConnectionKey, certificate_error: Exception
+    ) -> None:
+        self._conn_key = connection_key
+        self._certificate_error = certificate_error
+        self.args = (connection_key, certificate_error)
+
+    @property
+    def certificate_error(self) -> Exception:
+        return self._certificate_error
+
+    @property
+    def host(self) -> str:
+        return self._conn_key.host
+
+    @property
+    def port(self) -> Optional[int]:
+        return self._conn_key.port
+
+    @property
+    def ssl(self) -> bool:
+        return self._conn_key.is_ssl
+
+    def __str__(self) -> str:
+        return (
+            "Cannot connect to host {0.host}:{0.port} ssl:{0.ssl} "
+            "[{0.certificate_error.__class__.__name__}: "
+            "{0.certificate_error.args}]".format(self)
+        )
+
+
+class WSMessageTypeError(TypeError):
+    """WebSocket message type is not valid."""

backend_service/venv/lib/python3.13/site-packages/aiohttp/client_middleware_digest_auth.py

@@ -0,0 +1,476 @@
+"""
+Digest authentication middleware for aiohttp client.
+
+This middleware implements HTTP Digest Authentication according to RFC 7616,
+providing a more secure alternative to Basic Authentication. It supports all
+standard hash algorithms including MD5, SHA, SHA-256, SHA-512 and their session
+variants, as well as both 'auth' and 'auth-int' quality of protection (qop) options.
+"""
+
+import hashlib
+import os
+import re
+import time
+from typing import (
+    Callable,
+    Dict,
+    Final,
+    FrozenSet,
+    List,
+    Literal,
+    Tuple,
+    TypedDict,
+    Union,
+)
+
+from yarl import URL
+
+from . import hdrs
+from .client_exceptions import ClientError
+from .client_middlewares import ClientHandlerType
+from .client_reqrep import ClientRequest, ClientResponse
+from .payload import Payload
+
+
+class DigestAuthChallenge(TypedDict, total=False):
+    realm: str
+    nonce: str
+    qop: str
+    algorithm: str
+    opaque: str
+    domain: str
+    stale: str
+
+
+DigestFunctions: Dict[str, Callable[[bytes], "hashlib._Hash"]] = {
+    "MD5": hashlib.md5,
+    "MD5-SESS": hashlib.md5,
+    "SHA": hashlib.sha1,
+    "SHA-SESS": hashlib.sha1,
+    "SHA256": hashlib.sha256,
+    "SHA256-SESS": hashlib.sha256,
+    "SHA-256": hashlib.sha256,
+    "SHA-256-SESS": hashlib.sha256,
+    "SHA512": hashlib.sha512,
+    "SHA512-SESS": hashlib.sha512,
+    "SHA-512": hashlib.sha512,
+    "SHA-512-SESS": hashlib.sha512,
+}
+
+
+# Compile the regex pattern once at module level for performance
+_HEADER_PAIRS_PATTERN = re.compile(
+    r'(\w+)\s*=\s*(?:"((?:[^"\\]|\\.)*)"|([^\s,]+))'
+    # |    |  | | |  |    |      |    |  ||     |
+    # +----|--|-|-|--|----|------|----|--||-----|--> alphanumeric key
+    #      +--|-|-|--|----|------|----|--||-----|--> maybe whitespace
+    #         | | |  |    |      |    |  ||     |
+    #         +-|-|--|----|------|----|--||-----|--> = (delimiter)
+    #           +-|--|----|------|----|--||-----|--> maybe whitespace
+    #             |  |    |      |    |  ||     |
+    #             +--|----|------|----|--||-----|--> group quoted or unquoted
+    #                |    |      |    |  ||     |
+    #                +----|------|----|--||-----|--> if quoted...
+    #                     +------|----|--||-----|--> anything but " or \
+    #                            +----|--||-----|--> escaped characters allowed
+    #                                 +--||-----|--> or can be empty string
+    #                                    ||     |
+    #                                    +|-----|--> if unquoted...
+    #                                     +-----|--> anything but , or <space>
+    #                                           +--> at least one char req'd
+)
+
+
+# RFC 7616: Challenge parameters to extract
+CHALLENGE_FIELDS: Final[
+    Tuple[
+        Literal["realm", "nonce", "qop", "algorithm", "opaque", "domain", "stale"], ...
+    ]
+] = (
+    "realm",
+    "nonce",
+    "qop",
+    "algorithm",
+    "opaque",
+    "domain",
+    "stale",
+)
+
+# Supported digest authentication algorithms
+# Use a tuple of sorted keys for predictable documentation and error messages
+SUPPORTED_ALGORITHMS: Final[Tuple[str, ...]] = tuple(sorted(DigestFunctions.keys()))
+
+# RFC 7616: Fields that require quoting in the Digest auth header
+# These fields must be enclosed in double quotes in the Authorization header.
+# Algorithm, qop, and nc are never quoted per RFC specifications.
+# This frozen set is used by the template-based header construction to
+# automatically determine which fields need quotes.
+QUOTED_AUTH_FIELDS: Final[FrozenSet[str]] = frozenset(
+    {"username", "realm", "nonce", "uri", "response", "opaque", "cnonce"}
+)
+
+
+def escape_quotes(value: str) -> str:
+    """Escape double quotes for HTTP header values."""
+    return value.replace('"', '\\"')
+
+
+def unescape_quotes(value: str) -> str:
+    """Unescape double quotes in HTTP header values."""
+    return value.replace('\\"', '"')
+
+
+def parse_header_pairs(header: str) -> Dict[str, str]:
+    """
+    Parse key-value pairs from WWW-Authenticate or similar HTTP headers.
+
+    This function handles the complex format of WWW-Authenticate header values,
+    supporting both quoted and unquoted values, proper handling of commas in
+    quoted values, and whitespace variations per RFC 7616.
+
+    Examples of supported formats:
+      - key1="value1", key2=value2
+      - key1 = "value1" , key2="value, with, commas"
+      - key1=value1,key2="value2"
+      - realm="example.com", nonce="12345", qop="auth"
+
+    Args:
+        header: The header value string to parse
+
+    Returns:
+        Dictionary mapping parameter names to their values
+    """
+    return {
+        stripped_key: unescape_quotes(quoted_val) if quoted_val else unquoted_val
+        for key, quoted_val, unquoted_val in _HEADER_PAIRS_PATTERN.findall(header)
+        if (stripped_key := key.strip())
+    }
+
+
+class DigestAuthMiddleware:
+    """
+    HTTP digest authentication middleware for aiohttp client.
+
+    This middleware intercepts 401 Unauthorized responses containing a Digest
+    authentication challenge, calculates the appropriate digest credentials,
+    and automatically retries the request with the proper Authorization header.
+
+    Features:
+    - Handles all aspects of Digest authentication handshake automatically
+    - Supports all standard hash algorithms:
+      - MD5, MD5-SESS
+      - SHA, SHA-SESS
+      - SHA256, SHA256-SESS, SHA-256, SHA-256-SESS
+      - SHA512, SHA512-SESS, SHA-512, SHA-512-SESS
+    - Supports 'auth' and 'auth-int' quality of protection modes
+    - Properly handles quoted strings and parameter parsing
+    - Includes replay attack protection with client nonce count tracking
+    - Supports preemptive authentication per RFC 7616 Section 3.6
+
+    Standards compliance:
+    - RFC 7616: HTTP Digest Access Authentication (primary reference)
+    - RFC 2617: HTTP Authentication (deprecated by RFC 7616)
+    - RFC 1945: Section 11.1 (username restrictions)
+
+    Implementation notes:
+    The core digest calculation is inspired by the implementation in
+    https://github.com/requests/requests/blob/v2.18.4/requests/auth.py
+    with added support for modern digest auth features and error handling.
+    """
+
+    def __init__(
+        self,
+        login: str,
+        password: str,
+        preemptive: bool = True,
+    ) -> None:
+        if login is None:
+            raise ValueError("None is not allowed as login value")
+
+        if password is None:
+            raise ValueError("None is not allowed as password value")
+
+        if ":" in login:
+            raise ValueError('A ":" is not allowed in username (RFC 1945#section-11.1)')
+
+        self._login_str: Final[str] = login
+        self._login_bytes: Final[bytes] = login.encode("utf-8")
+        self._password_bytes: Final[bytes] = password.encode("utf-8")
+
+        self._last_nonce_bytes = b""
+        self._nonce_count = 0
+        self._challenge: DigestAuthChallenge = {}
+        self._preemptive: bool = preemptive
+        # Set of URLs defining the protection space
+        self._protection_space: List[str] = []
+
+    async def _encode(
+        self, method: str, url: URL, body: Union[Payload, Literal[b""]]
+    ) -> str:
+        """
+        Build digest authorization header for the current challenge.
+
+        Args:
+            method: The HTTP method (GET, POST, etc.)
+            url: The request URL
+            body: The request body (used for qop=auth-int)
+
+        Returns:
+            A fully formatted Digest authorization header string
+
+        Raises:
+            ClientError: If the challenge is missing required parameters or
+                         contains unsupported values
+
+        """
+        challenge = self._challenge
+        if "realm" not in challenge:
+            raise ClientError(
+                "Malformed Digest auth challenge: Missing 'realm' parameter"
+            )
+
+        if "nonce" not in challenge:
+            raise ClientError(
+                "Malformed Digest auth challenge: Missing 'nonce' parameter"
+            )
+
+        # Empty realm values are allowed per RFC 7616 (SHOULD, not MUST, contain host name)
+        realm = challenge["realm"]
+        nonce = challenge["nonce"]
+
+        # Empty nonce values are not allowed as they are security-critical for replay protection
+        if not nonce:
+            raise ClientError(
+                "Security issue: Digest auth challenge contains empty 'nonce' value"
+            )
+
+        qop_raw = challenge.get("qop", "")
+        # Preserve original algorithm case for response while using uppercase for processing
+        algorithm_original = challenge.get("algorithm", "MD5")
+        algorithm = algorithm_original.upper()
+        opaque = challenge.get("opaque", "")
+
+        # Convert string values to bytes once
+        nonce_bytes = nonce.encode("utf-8")
+        realm_bytes = realm.encode("utf-8")
+        path = URL(url).path_qs
+
+        # Process QoP
+        qop = ""
+        qop_bytes = b""
+        if qop_raw:
+            valid_qops = {"auth", "auth-int"}.intersection(
+                {q.strip() for q in qop_raw.split(",") if q.strip()}
+            )
+            if not valid_qops:
+                raise ClientError(
+                    f"Digest auth error: Unsupported Quality of Protection (qop) value(s): {qop_raw}"
+                )
+
+            qop = "auth-int" if "auth-int" in valid_qops else "auth"
+            qop_bytes = qop.encode("utf-8")
+
+        if algorithm not in DigestFunctions:
+            raise ClientError(
+                f"Digest auth error: Unsupported hash algorithm: {algorithm}. "
+                f"Supported algorithms: {', '.join(SUPPORTED_ALGORITHMS)}"
+            )
+        hash_fn: Final = DigestFunctions[algorithm]
+
+        def H(x: bytes) -> bytes:
+            """RFC 7616 Section 3: Hash function H(data) = hex(hash(data))."""
+            return hash_fn(x).hexdigest().encode()
+
+        def KD(s: bytes, d: bytes) -> bytes:
+            """RFC 7616 Section 3: KD(secret, data) = H(concat(secret, ":", data))."""
+            return H(b":".join((s, d)))
+
+        # Calculate A1 and A2
+        A1 = b":".join((self._login_bytes, realm_bytes, self._password_bytes))
+        A2 = f"{method.upper()}:{path}".encode()
+        if qop == "auth-int":
+            if isinstance(body, Payload):  # will always be empty bytes unless Payload
+                entity_bytes = await body.as_bytes()  # Get bytes from Payload
+            else:
+                entity_bytes = body
+            entity_hash = H(entity_bytes)
+            A2 = b":".join((A2, entity_hash))
+
+        HA1 = H(A1)
+        HA2 = H(A2)
+
+        # Nonce count handling
+        if nonce_bytes == self._last_nonce_bytes:
+            self._nonce_count += 1
+        else:
+            self._nonce_count = 1
+
+        self._last_nonce_bytes = nonce_bytes
+        ncvalue = f"{self._nonce_count:08x}"
+        ncvalue_bytes = ncvalue.encode("utf-8")
+
+        # Generate client nonce
+        cnonce = hashlib.sha1(
+            b"".join(
+                [
+                    str(self._nonce_count).encode("utf-8"),
+                    nonce_bytes,
+                    time.ctime().encode("utf-8"),
+                    os.urandom(8),
+                ]
+            )
+        ).hexdigest()[:16]
+        cnonce_bytes = cnonce.encode("utf-8")
+
+        # Special handling for session-based algorithms
+        if algorithm.upper().endswith("-SESS"):
+            HA1 = H(b":".join((HA1, nonce_bytes, cnonce_bytes)))
+
+        # Calculate the response digest
+        if qop:
+            noncebit = b":".join(
+                (nonce_bytes, ncvalue_bytes, cnonce_bytes, qop_bytes, HA2)
+            )
+            response_digest = KD(HA1, noncebit)
+        else:
+            response_digest = KD(HA1, b":".join((nonce_bytes, HA2)))
+
+        # Define a dict mapping of header fields to their values
+        # Group fields into always-present, optional, and qop-dependent
+        header_fields = {
+            # Always present fields
+            "username": escape_quotes(self._login_str),
+            "realm": escape_quotes(realm),
+            "nonce": escape_quotes(nonce),
+            "uri": path,
+            "response": response_digest.decode(),
+            "algorithm": algorithm_original,
+        }
+
+        # Optional fields
+        if opaque:
+            header_fields["opaque"] = escape_quotes(opaque)
+
+        # QoP-dependent fields
+        if qop:
+            header_fields["qop"] = qop
+            header_fields["nc"] = ncvalue
+            header_fields["cnonce"] = cnonce
+
+        # Build header using templates for each field type
+        pairs: List[str] = []
+        for field, value in header_fields.items():
+            if field in QUOTED_AUTH_FIELDS:
+                pairs.append(f'{field}="{value}"')
+            else:
+                pairs.append(f"{field}={value}")
+
+        return f"Digest {', '.join(pairs)}"
+
+    def _in_protection_space(self, url: URL) -> bool:
+        """
+        Check if the given URL is within the current protection space.
+
+        According to RFC 7616, a URI is in the protection space if any URI
+        in the protection space is a prefix of it (after both have been made absolute).
+        """
+        request_str = str(url)
+        for space_str in self._protection_space:
+            # Check if request starts with space URL
+            if not request_str.startswith(space_str):
+                continue
+            # Exact match or space ends with / (proper directory prefix)
+            if len(request_str) == len(space_str) or space_str[-1] == "/":
+                return True
+            # Check next char is / to ensure proper path boundary
+            if request_str[len(space_str)] == "/":
+                return True
+        return False
+
+    def _authenticate(self, response: ClientResponse) -> bool:
+        """
+        Takes the given response and tries digest-auth, if needed.
+
+        Returns true if the original request must be resent.
+        """
+        if response.status != 401:
+            return False
+
+        auth_header = response.headers.get("www-authenticate", "")
+        if not auth_header:
+            return False  # No authentication header present
+
+        method, sep, headers = auth_header.partition(" ")
+        if not sep:
+            # No space found in www-authenticate header
+            return False  # Malformed auth header, missing scheme separator
+
+        if method.lower() != "digest":
+            # Not a digest auth challenge (could be Basic, Bearer, etc.)
+            return False
+
+        if not headers:
+            # We have a digest scheme but no parameters
+            return False  # Malformed digest header, missing parameters
+
+        # We have a digest auth header with content
+        if not (header_pairs := parse_header_pairs(headers)):
+            # Failed to parse any key-value pairs
+            return False  # Malformed digest header, no valid parameters
+
+        # Extract challenge parameters
+        self._challenge = {}
+        for field in CHALLENGE_FIELDS:
+            if value := header_pairs.get(field):
+                self._challenge[field] = value
+
+        # Update protection space based on domain parameter or default to origin
+        origin = response.url.origin()
+
+        if domain := self._challenge.get("domain"):
+            # Parse space-separated list of URIs
+            self._protection_space = []
+            for uri in domain.split():
+                # Remove quotes if present
+                uri = uri.strip('"')
+                if uri.startswith("/"):
+                    # Path-absolute, relative to origin
+                    self._protection_space.append(str(origin.join(URL(uri))))
+                else:
+                    # Absolute URI
+                    self._protection_space.append(str(URL(uri)))
+        else:
+            # No domain specified, protection space is entire origin
+            self._protection_space = [str(origin)]
+
+        # Return True only if we found at least one challenge parameter
+        return bool(self._challenge)
+
+    async def __call__(
+        self, request: ClientRequest, handler: ClientHandlerType
+    ) -> ClientResponse:
+        """Run the digest auth middleware."""
+        response = None
+        for retry_count in range(2):
+            # Apply authorization header if:
+            # 1. This is a retry after 401 (retry_count > 0), OR
+            # 2. Preemptive auth is enabled AND we have a challenge AND the URL is in protection space
+            if retry_count > 0 or (
+                self._preemptive
+                and self._challenge
+                and self._in_protection_space(request.url)
+            ):
+                request.headers[hdrs.AUTHORIZATION] = await self._encode(
+                    request.method, request.url, request.body
+                )
+
+            # Send the request
+            response = await handler(request)
+
+            # Check if we need to authenticate
+            if not self._authenticate(response):
+                break
+
+        # At this point, response is guaranteed to be defined
+        assert response is not None
+        return response

backend_service/venv/lib/python3.13/site-packages/aiohttp/client_middlewares.py

@@ -0,0 +1,55 @@
+"""Client middleware support."""
+
+from collections.abc import Awaitable, Callable, Sequence
+
+from .client_reqrep import ClientRequest, ClientResponse
+
+__all__ = ("ClientMiddlewareType", "ClientHandlerType", "build_client_middlewares")
+
+# Type alias for client request handlers - functions that process requests and return responses
+ClientHandlerType = Callable[[ClientRequest], Awaitable[ClientResponse]]
+
+# Type for client middleware - similar to server but uses ClientRequest/ClientResponse
+ClientMiddlewareType = Callable[
+    [ClientRequest, ClientHandlerType], Awaitable[ClientResponse]
+]
+
+
+def build_client_middlewares(
+    handler: ClientHandlerType,
+    middlewares: Sequence[ClientMiddlewareType],
+) -> ClientHandlerType:
+    """
+    Apply middlewares to request handler.
+
+    The middlewares are applied in reverse order, so the first middleware
+    in the list wraps all subsequent middlewares and the handler.
+
+    This implementation avoids using partial/update_wrapper to minimize overhead
+    and doesn't cache to avoid holding references to stateful middleware.
+    """
+    # Optimize for single middleware case
+    if len(middlewares) == 1:
+        middleware = middlewares[0]
+
+        async def single_middleware_handler(req: ClientRequest) -> ClientResponse:
+            return await middleware(req, handler)
+
+        return single_middleware_handler
+
+    # Build the chain for multiple middlewares
+    current_handler = handler
+
+    for middleware in reversed(middlewares):
+        # Create a new closure that captures the current state
+        def make_wrapper(
+            mw: ClientMiddlewareType, next_h: ClientHandlerType
+        ) -> ClientHandlerType:
+            async def wrapped(req: ClientRequest) -> ClientResponse:
+                return await mw(req, next_h)
+
+            return wrapped
+
+        current_handler = make_wrapper(middleware, current_handler)
+
+    return current_handler

backend_service/venv/lib/python3.13/site-packages/aiohttp/client_proto.py

@@ -0,0 +1,359 @@
+import asyncio
+from contextlib import suppress
+from typing import Any, Optional, Tuple, Union
+
+from .base_protocol import BaseProtocol
+from .client_exceptions import (
+    ClientConnectionError,
+    ClientOSError,
+    ClientPayloadError,
+    ServerDisconnectedError,
+    SocketTimeoutError,
+)
+from .helpers import (
+    _EXC_SENTINEL,
+    EMPTY_BODY_STATUS_CODES,
+    BaseTimerContext,
+    set_exception,
+    set_result,
+)
+from .http import HttpResponseParser, RawResponseMessage
+from .http_exceptions import HttpProcessingError
+from .streams import EMPTY_PAYLOAD, DataQueue, StreamReader
+
+
+class ResponseHandler(BaseProtocol, DataQueue[Tuple[RawResponseMessage, StreamReader]]):
+    """Helper class to adapt between Protocol and StreamReader."""
+
+    def __init__(self, loop: asyncio.AbstractEventLoop) -> None:
+        BaseProtocol.__init__(self, loop=loop)
+        DataQueue.__init__(self, loop)
+
+        self._should_close = False
+
+        self._payload: Optional[StreamReader] = None
+        self._skip_payload = False
+        self._payload_parser = None
+
+        self._timer = None
+
+        self._tail = b""
+        self._upgraded = False
+        self._parser: Optional[HttpResponseParser] = None
+
+        self._read_timeout: Optional[float] = None
+        self._read_timeout_handle: Optional[asyncio.TimerHandle] = None
+
+        self._timeout_ceil_threshold: Optional[float] = 5
+
+        self._closed: Union[None, asyncio.Future[None]] = None
+        self._connection_lost_called = False
+
+    @property
+    def closed(self) -> Union[None, asyncio.Future[None]]:
+        """Future that is set when the connection is closed.
+
+        This property returns a Future that will be completed when the connection
+        is closed. The Future is created lazily on first access to avoid creating
+        futures that will never be awaited.
+
+        Returns:
+            - A Future[None] if the connection is still open or was closed after
+              this property was accessed
+            - None if connection_lost() was already called before this property
+              was ever accessed (indicating no one is waiting for the closure)
+        """
+        if self._closed is None and not self._connection_lost_called:
+            self._closed = self._loop.create_future()
+        return self._closed
+
+    @property
+    def upgraded(self) -> bool:
+        return self._upgraded
+
+    @property
+    def should_close(self) -> bool:
+        return bool(
+            self._should_close
+            or (self._payload is not None and not self._payload.is_eof())
+            or self._upgraded
+            or self._exception is not None
+            or self._payload_parser is not None
+            or self._buffer
+            or self._tail
+        )
+
+    def force_close(self) -> None:
+        self._should_close = True
+
+    def close(self) -> None:
+        self._exception = None  # Break cyclic references
+        transport = self.transport
+        if transport is not None:
+            transport.close()
+            self.transport = None
+            self._payload = None
+            self._drop_timeout()
+
+    def abort(self) -> None:
+        self._exception = None  # Break cyclic references
+        transport = self.transport
+        if transport is not None:
+            transport.abort()
+            self.transport = None
+            self._payload = None
+            self._drop_timeout()
+
+    def is_connected(self) -> bool:
+        return self.transport is not None and not self.transport.is_closing()
+
+    def connection_lost(self, exc: Optional[BaseException]) -> None:
+        self._connection_lost_called = True
+        self._drop_timeout()
+
+        original_connection_error = exc
+        reraised_exc = original_connection_error
+
+        connection_closed_cleanly = original_connection_error is None
+
+        if self._closed is not None:
+            # If someone is waiting for the closed future,
+            # we should set it to None or an exception. If
+            # self._closed is None, it means that
+            # connection_lost() was called already
+            # or nobody is waiting for it.
+            if connection_closed_cleanly:
+                set_result(self._closed, None)
+            else:
+                assert original_connection_error is not None
+                set_exception(
+                    self._closed,
+                    ClientConnectionError(
+                        f"Connection lost: {original_connection_error !s}",
+                    ),
+                    original_connection_error,
+                )
+
+        if self._payload_parser is not None:
+            with suppress(Exception):  # FIXME: log this somehow?
+                self._payload_parser.feed_eof()
+
+        uncompleted = None
+        if self._parser is not None:
+            try:
+                uncompleted = self._parser.feed_eof()
+            except Exception as underlying_exc:
+                if self._payload is not None:
+                    client_payload_exc_msg = (
+                        f"Response payload is not completed: {underlying_exc !r}"
+                    )
+                    if not connection_closed_cleanly:
+                        client_payload_exc_msg = (
+                            f"{client_payload_exc_msg !s}. "
+                            f"{original_connection_error !r}"
+                        )
+                    set_exception(
+                        self._payload,
+                        ClientPayloadError(client_payload_exc_msg),
+                        underlying_exc,
+                    )
+
+        if not self.is_eof():
+            if isinstance(original_connection_error, OSError):
+                reraised_exc = ClientOSError(*original_connection_error.args)
+            if connection_closed_cleanly:
+                reraised_exc = ServerDisconnectedError(uncompleted)
+            # assigns self._should_close to True as side effect,
+            # we do it anyway below
+            underlying_non_eof_exc = (
+                _EXC_SENTINEL
+                if connection_closed_cleanly
+                else original_connection_error
+            )
+            assert underlying_non_eof_exc is not None
+            assert reraised_exc is not None
+            self.set_exception(reraised_exc, underlying_non_eof_exc)
+
+        self._should_close = True
+        self._parser = None
+        self._payload = None
+        self._payload_parser = None
+        self._reading_paused = False
+
+        super().connection_lost(reraised_exc)
+
+    def eof_received(self) -> None:
+        # should call parser.feed_eof() most likely
+        self._drop_timeout()
+
+    def pause_reading(self) -> None:
+        super().pause_reading()
+        self._drop_timeout()
+
+    def resume_reading(self) -> None:
+        super().resume_reading()
+        self._reschedule_timeout()
+
+    def set_exception(
+        self,
+        exc: BaseException,
+        exc_cause: BaseException = _EXC_SENTINEL,
+    ) -> None:
+        self._should_close = True
+        self._drop_timeout()
+        super().set_exception(exc, exc_cause)
+
+    def set_parser(self, parser: Any, payload: Any) -> None:
+        # TODO: actual types are:
+        #   parser: WebSocketReader
+        #   payload: WebSocketDataQueue
+        # but they are not generi enough
+        # Need an ABC for both types
+        self._payload = payload
+        self._payload_parser = parser
+
+        self._drop_timeout()
+
+        if self._tail:
+            data, self._tail = self._tail, b""
+            self.data_received(data)
+
+    def set_response_params(
+        self,
+        *,
+        timer: Optional[BaseTimerContext] = None,
+        skip_payload: bool = False,
+        read_until_eof: bool = False,
+        auto_decompress: bool = True,
+        read_timeout: Optional[float] = None,
+        read_bufsize: int = 2**16,
+        timeout_ceil_threshold: float = 5,
+        max_line_size: int = 8190,
+        max_field_size: int = 8190,
+    ) -> None:
+        self._skip_payload = skip_payload
+
+        self._read_timeout = read_timeout
+
+        self._timeout_ceil_threshold = timeout_ceil_threshold
+
+        self._parser = HttpResponseParser(
+            self,
+            self._loop,
+            read_bufsize,
+            timer=timer,
+            payload_exception=ClientPayloadError,
+            response_with_body=not skip_payload,
+            read_until_eof=read_until_eof,
+            auto_decompress=auto_decompress,
+            max_line_size=max_line_size,
+            max_field_size=max_field_size,
+        )
+
+        if self._tail:
+            data, self._tail = self._tail, b""
+            self.data_received(data)
+
+    def _drop_timeout(self) -> None:
+        if self._read_timeout_handle is not None:
+            self._read_timeout_handle.cancel()
+            self._read_timeout_handle = None
+
+    def _reschedule_timeout(self) -> None:
+        timeout = self._read_timeout
+        if self._read_timeout_handle is not None:
+            self._read_timeout_handle.cancel()
+
+        if timeout:
+            self._read_timeout_handle = self._loop.call_later(
+                timeout, self._on_read_timeout
+            )
+        else:
+            self._read_timeout_handle = None
+
+    def start_timeout(self) -> None:
+        self._reschedule_timeout()
+
+    @property
+    def read_timeout(self) -> Optional[float]:
+        return self._read_timeout
+
+    @read_timeout.setter
+    def read_timeout(self, read_timeout: Optional[float]) -> None:
+        self._read_timeout = read_timeout
+
+    def _on_read_timeout(self) -> None:
+        exc = SocketTimeoutError("Timeout on reading data from socket")
+        self.set_exception(exc)
+        if self._payload is not None:
+            set_exception(self._payload, exc)
+
+    def data_received(self, data: bytes) -> None:
+        self._reschedule_timeout()
+
+        if not data:
+            return
+
+        # custom payload parser - currently always WebSocketReader
+        if self._payload_parser is not None:
+            eof, tail = self._payload_parser.feed_data(data)
+            if eof:
+                self._payload = None
+                self._payload_parser = None
+
+                if tail:
+                    self.data_received(tail)
+            return
+
+        if self._upgraded or self._parser is None:
+            # i.e. websocket connection, websocket parser is not set yet
+            self._tail += data
+            return
+
+        # parse http messages
+        try:
+            messages, upgraded, tail = self._parser.feed_data(data)
+        except BaseException as underlying_exc:
+            if self.transport is not None:
+                # connection.release() could be called BEFORE
+                # data_received(), the transport is already
+                # closed in this case
+                self.transport.close()
+            # should_close is True after the call
+            if isinstance(underlying_exc, HttpProcessingError):
+                exc = HttpProcessingError(
+                    code=underlying_exc.code,
+                    message=underlying_exc.message,
+                    headers=underlying_exc.headers,
+                )
+            else:
+                exc = HttpProcessingError()
+            self.set_exception(exc, underlying_exc)
+            return
+
+        self._upgraded = upgraded
+
+        payload: Optional[StreamReader] = None
+        for message, payload in messages:
+            if message.should_close:
+                self._should_close = True
+
+            self._payload = payload
+
+            if self._skip_payload or message.code in EMPTY_BODY_STATUS_CODES:
+                self.feed_data((message, EMPTY_PAYLOAD), 0)
+            else:
+                self.feed_data((message, payload), 0)
+
+        if payload is not None:
+            # new message(s) was processed
+            # register timeout handler unsubscribing
+            # either on end-of-stream or immediately for
+            # EMPTY_PAYLOAD
+            if payload is not EMPTY_PAYLOAD:
+                payload.on_eof(self._drop_timeout)
+            else:
+                self._drop_timeout()
+
+        if upgraded and tail:
+            self.data_received(tail)

backend_service/venv/lib/python3.13/site-packages/aiohttp/client_ws.py

@@ -0,0 +1,428 @@
+"""WebSocket client for asyncio."""
+
+import asyncio
+import sys
+from types import TracebackType
+from typing import Any, Optional, Type, cast
+
+import attr
+
+from ._websocket.reader import WebSocketDataQueue
+from .client_exceptions import ClientError, ServerTimeoutError, WSMessageTypeError
+from .client_reqrep import ClientResponse
+from .helpers import calculate_timeout_when, set_result
+from .http import (
+    WS_CLOSED_MESSAGE,
+    WS_CLOSING_MESSAGE,
+    WebSocketError,
+    WSCloseCode,
+    WSMessage,
+    WSMsgType,
+)
+from .http_websocket import _INTERNAL_RECEIVE_TYPES, WebSocketWriter
+from .streams import EofStream
+from .typedefs import (
+    DEFAULT_JSON_DECODER,
+    DEFAULT_JSON_ENCODER,
+    JSONDecoder,
+    JSONEncoder,
+)
+
+if sys.version_info >= (3, 11):
+    import asyncio as async_timeout
+else:
+    import async_timeout
+
+
+@attr.s(frozen=True, slots=True)
+class ClientWSTimeout:
+    ws_receive = attr.ib(type=Optional[float], default=None)
+    ws_close = attr.ib(type=Optional[float], default=None)
+
+
+DEFAULT_WS_CLIENT_TIMEOUT = ClientWSTimeout(ws_receive=None, ws_close=10.0)
+
+
+class ClientWebSocketResponse:
+    def __init__(
+        self,
+        reader: WebSocketDataQueue,
+        writer: WebSocketWriter,
+        protocol: Optional[str],
+        response: ClientResponse,
+        timeout: ClientWSTimeout,
+        autoclose: bool,
+        autoping: bool,
+        loop: asyncio.AbstractEventLoop,
+        *,
+        heartbeat: Optional[float] = None,
+        compress: int = 0,
+        client_notakeover: bool = False,
+    ) -> None:
+        self._response = response
+        self._conn = response.connection
+
+        self._writer = writer
+        self._reader = reader
+        self._protocol = protocol
+        self._closed = False
+        self._closing = False
+        self._close_code: Optional[int] = None
+        self._timeout = timeout
+        self._autoclose = autoclose
+        self._autoping = autoping
+        self._heartbeat = heartbeat
+        self._heartbeat_cb: Optional[asyncio.TimerHandle] = None
+        self._heartbeat_when: float = 0.0
+        if heartbeat is not None:
+            self._pong_heartbeat = heartbeat / 2.0
+        self._pong_response_cb: Optional[asyncio.TimerHandle] = None
+        self._loop = loop
+        self._waiting: bool = False
+        self._close_wait: Optional[asyncio.Future[None]] = None
+        self._exception: Optional[BaseException] = None
+        self._compress = compress
+        self._client_notakeover = client_notakeover
+        self._ping_task: Optional[asyncio.Task[None]] = None
+
+        self._reset_heartbeat()
+
+    def _cancel_heartbeat(self) -> None:
+        self._cancel_pong_response_cb()
+        if self._heartbeat_cb is not None:
+            self._heartbeat_cb.cancel()
+            self._heartbeat_cb = None
+        if self._ping_task is not None:
+            self._ping_task.cancel()
+            self._ping_task = None
+
+    def _cancel_pong_response_cb(self) -> None:
+        if self._pong_response_cb is not None:
+            self._pong_response_cb.cancel()
+            self._pong_response_cb = None
+
+    def _reset_heartbeat(self) -> None:
+        if self._heartbeat is None:
+            return
+        self._cancel_pong_response_cb()
+        loop = self._loop
+        assert loop is not None
+        conn = self._conn
+        timeout_ceil_threshold = (
+            conn._connector._timeout_ceil_threshold if conn is not None else 5
+        )
+        now = loop.time()
+        when = calculate_timeout_when(now, self._heartbeat, timeout_ceil_threshold)
+        self._heartbeat_when = when
+        if self._heartbeat_cb is None:
+            # We do not cancel the previous heartbeat_cb here because
+            # it generates a significant amount of TimerHandle churn
+            # which causes asyncio to rebuild the heap frequently.
+            # Instead _send_heartbeat() will reschedule the next
+            # heartbeat if it fires too early.
+            self._heartbeat_cb = loop.call_at(when, self._send_heartbeat)
+
+    def _send_heartbeat(self) -> None:
+        self._heartbeat_cb = None
+        loop = self._loop
+        now = loop.time()
+        if now < self._heartbeat_when:
+            # Heartbeat fired too early, reschedule
+            self._heartbeat_cb = loop.call_at(
+                self._heartbeat_when, self._send_heartbeat
+            )
+            return
+
+        conn = self._conn
+        timeout_ceil_threshold = (
+            conn._connector._timeout_ceil_threshold if conn is not None else 5
+        )
+        when = calculate_timeout_when(now, self._pong_heartbeat, timeout_ceil_threshold)
+        self._cancel_pong_response_cb()
+        self._pong_response_cb = loop.call_at(when, self._pong_not_received)
+
+        coro = self._writer.send_frame(b"", WSMsgType.PING)
+        if sys.version_info >= (3, 12):
+            # Optimization for Python 3.12, try to send the ping
+            # immediately to avoid having to schedule
+            # the task on the event loop.
+            ping_task = asyncio.Task(coro, loop=loop, eager_start=True)
+        else:
+            ping_task = loop.create_task(coro)
+
+        if not ping_task.done():
+            self._ping_task = ping_task
+            ping_task.add_done_callback(self._ping_task_done)
+        else:
+            self._ping_task_done(ping_task)
+
+    def _ping_task_done(self, task: "asyncio.Task[None]") -> None:
+        """Callback for when the ping task completes."""
+        if not task.cancelled() and (exc := task.exception()):
+            self._handle_ping_pong_exception(exc)
+        self._ping_task = None
+
+    def _pong_not_received(self) -> None:
+        self._handle_ping_pong_exception(
+            ServerTimeoutError(f"No PONG received after {self._pong_heartbeat} seconds")
+        )
+
+    def _handle_ping_pong_exception(self, exc: BaseException) -> None:
+        """Handle exceptions raised during ping/pong processing."""
+        if self._closed:
+            return
+        self._set_closed()
+        self._close_code = WSCloseCode.ABNORMAL_CLOSURE
+        self._exception = exc
+        self._response.close()
+        if self._waiting and not self._closing:
+            self._reader.feed_data(WSMessage(WSMsgType.ERROR, exc, None), 0)
+
+    def _set_closed(self) -> None:
+        """Set the connection to closed.
+
+        Cancel any heartbeat timers and set the closed flag.
+        """
+        self._closed = True
+        self._cancel_heartbeat()
+
+    def _set_closing(self) -> None:
+        """Set the connection to closing.
+
+        Cancel any heartbeat timers and set the closing flag.
+        """
+        self._closing = True
+        self._cancel_heartbeat()
+
+    @property
+    def closed(self) -> bool:
+        return self._closed
+
+    @property
+    def close_code(self) -> Optional[int]:
+        return self._close_code
+
+    @property
+    def protocol(self) -> Optional[str]:
+        return self._protocol
+
+    @property
+    def compress(self) -> int:
+        return self._compress
+
+    @property
+    def client_notakeover(self) -> bool:
+        return self._client_notakeover
+
+    def get_extra_info(self, name: str, default: Any = None) -> Any:
+        """extra info from connection transport"""
+        conn = self._response.connection
+        if conn is None:
+            return default
+        transport = conn.transport
+        if transport is None:
+            return default
+        return transport.get_extra_info(name, default)
+
+    def exception(self) -> Optional[BaseException]:
+        return self._exception
+
+    async def ping(self, message: bytes = b"") -> None:
+        await self._writer.send_frame(message, WSMsgType.PING)
+
+    async def pong(self, message: bytes = b"") -> None:
+        await self._writer.send_frame(message, WSMsgType.PONG)
+
+    async def send_frame(
+        self, message: bytes, opcode: WSMsgType, compress: Optional[int] = None
+    ) -> None:
+        """Send a frame over the websocket."""
+        await self._writer.send_frame(message, opcode, compress)
+
+    async def send_str(self, data: str, compress: Optional[int] = None) -> None:
+        if not isinstance(data, str):
+            raise TypeError("data argument must be str (%r)" % type(data))
+        await self._writer.send_frame(
+            data.encode("utf-8"), WSMsgType.TEXT, compress=compress
+        )
+
+    async def send_bytes(self, data: bytes, compress: Optional[int] = None) -> None:
+        if not isinstance(data, (bytes, bytearray, memoryview)):
+            raise TypeError("data argument must be byte-ish (%r)" % type(data))
+        await self._writer.send_frame(data, WSMsgType.BINARY, compress=compress)
+
+    async def send_json(
+        self,
+        data: Any,
+        compress: Optional[int] = None,
+        *,
+        dumps: JSONEncoder = DEFAULT_JSON_ENCODER,
+    ) -> None:
+        await self.send_str(dumps(data), compress=compress)
+
+    async def close(self, *, code: int = WSCloseCode.OK, message: bytes = b"") -> bool:
+        # we need to break `receive()` cycle first,
+        # `close()` may be called from different task
+        if self._waiting and not self._closing:
+            assert self._loop is not None
+            self._close_wait = self._loop.create_future()
+            self._set_closing()
+            self._reader.feed_data(WS_CLOSING_MESSAGE, 0)
+            await self._close_wait
+
+        if self._closed:
+            return False
+
+        self._set_closed()
+        try:
+            await self._writer.close(code, message)
+        except asyncio.CancelledError:
+            self._close_code = WSCloseCode.ABNORMAL_CLOSURE
+            self._response.close()
+            raise
+        except Exception as exc:
+            self._close_code = WSCloseCode.ABNORMAL_CLOSURE
+            self._exception = exc
+            self._response.close()
+            return True
+
+        if self._close_code:
+            self._response.close()
+            return True
+
+        while True:
+            try:
+                async with async_timeout.timeout(self._timeout.ws_close):
+                    msg = await self._reader.read()
+            except asyncio.CancelledError:
+                self._close_code = WSCloseCode.ABNORMAL_CLOSURE
+                self._response.close()
+                raise
+            except Exception as exc:
+                self._close_code = WSCloseCode.ABNORMAL_CLOSURE
+                self._exception = exc
+                self._response.close()
+                return True
+
+            if msg.type is WSMsgType.CLOSE:
+                self._close_code = msg.data
+                self._response.close()
+                return True
+
+    async def receive(self, timeout: Optional[float] = None) -> WSMessage:
+        receive_timeout = timeout or self._timeout.ws_receive
+
+        while True:
+            if self._waiting:
+                raise RuntimeError("Concurrent call to receive() is not allowed")
+
+            if self._closed:
+                return WS_CLOSED_MESSAGE
+            elif self._closing:
+                await self.close()
+                return WS_CLOSED_MESSAGE
+
+            try:
+                self._waiting = True
+                try:
+                    if receive_timeout:
+                        # Entering the context manager and creating
+                        # Timeout() object can take almost 50% of the
+                        # run time in this loop so we avoid it if
+                        # there is no read timeout.
+                        async with async_timeout.timeout(receive_timeout):
+                            msg = await self._reader.read()
+                    else:
+                        msg = await self._reader.read()
+                    self._reset_heartbeat()
+                finally:
+                    self._waiting = False
+                    if self._close_wait:
+                        set_result(self._close_wait, None)
+            except (asyncio.CancelledError, asyncio.TimeoutError):
+                self._close_code = WSCloseCode.ABNORMAL_CLOSURE
+                raise
+            except EofStream:
+                self._close_code = WSCloseCode.OK
+                await self.close()
+                return WSMessage(WSMsgType.CLOSED, None, None)
+            except ClientError:
+                # Likely ServerDisconnectedError when connection is lost
+                self._set_closed()
+                self._close_code = WSCloseCode.ABNORMAL_CLOSURE
+                return WS_CLOSED_MESSAGE
+            except WebSocketError as exc:
+                self._close_code = exc.code
+                await self.close(code=exc.code)
+                return WSMessage(WSMsgType.ERROR, exc, None)
+            except Exception as exc:
+                self._exception = exc
+                self._set_closing()
+                self._close_code = WSCloseCode.ABNORMAL_CLOSURE
+                await self.close()
+                return WSMessage(WSMsgType.ERROR, exc, None)
+
+            if msg.type not in _INTERNAL_RECEIVE_TYPES:
+                # If its not a close/closing/ping/pong message
+                # we can return it immediately
+                return msg
+
+            if msg.type is WSMsgType.CLOSE:
+                self._set_closing()
+                self._close_code = msg.data
+                if not self._closed and self._autoclose:
+                    await self.close()
+            elif msg.type is WSMsgType.CLOSING:
+                self._set_closing()
+            elif msg.type is WSMsgType.PING and self._autoping:
+                await self.pong(msg.data)
+                continue
+            elif msg.type is WSMsgType.PONG and self._autoping:
+                continue
+
+            return msg
+
+    async def receive_str(self, *, timeout: Optional[float] = None) -> str:
+        msg = await self.receive(timeout)
+        if msg.type is not WSMsgType.TEXT:
+            raise WSMessageTypeError(
+                f"Received message {msg.type}:{msg.data!r} is not WSMsgType.TEXT"
+            )
+        return cast(str, msg.data)
+
+    async def receive_bytes(self, *, timeout: Optional[float] = None) -> bytes:
+        msg = await self.receive(timeout)
+        if msg.type is not WSMsgType.BINARY:
+            raise WSMessageTypeError(
+                f"Received message {msg.type}:{msg.data!r} is not WSMsgType.BINARY"
+            )
+        return cast(bytes, msg.data)
+
+    async def receive_json(
+        self,
+        *,
+        loads: JSONDecoder = DEFAULT_JSON_DECODER,
+        timeout: Optional[float] = None,
+    ) -> Any:
+        data = await self.receive_str(timeout=timeout)
+        return loads(data)
+
+    def __aiter__(self) -> "ClientWebSocketResponse":
+        return self
+
+    async def __anext__(self) -> WSMessage:
+        msg = await self.receive()
+        if msg.type in (WSMsgType.CLOSE, WSMsgType.CLOSING, WSMsgType.CLOSED):
+            raise StopAsyncIteration
+        return msg
+
+    async def __aenter__(self) -> "ClientWebSocketResponse":
+        return self
+
+    async def __aexit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        await self.close()

backend_service/venv/lib/python3.13/site-packages/aiohttp/compression_utils.py

@@ -0,0 +1,319 @@
+import asyncio
+import sys
+import zlib
+from concurrent.futures import Executor
+from typing import Any, Final, Optional, Protocol, TypedDict, cast
+
+if sys.version_info >= (3, 12):
+    from collections.abc import Buffer
+else:
+    from typing import Union
+
+    Buffer = Union[bytes, bytearray, "memoryview[int]", "memoryview[bytes]"]
+
+try:
+    try:
+        import brotlicffi as brotli
+    except ImportError:
+        import brotli
+
+    HAS_BROTLI = True
+except ImportError:  # pragma: no cover
+    HAS_BROTLI = False
+
+try:
+    if sys.version_info >= (3, 14):
+        from compression.zstd import ZstdDecompressor  # noqa: I900
+    else:  # TODO(PY314): Remove mentions of backports.zstd across codebase
+        from backports.zstd import ZstdDecompressor
+
+    HAS_ZSTD = True
+except ImportError:
+    HAS_ZSTD = False
+
+
+MAX_SYNC_CHUNK_SIZE = 1024
+
+
+class ZLibCompressObjProtocol(Protocol):
+    def compress(self, data: Buffer) -> bytes: ...
+    def flush(self, mode: int = ..., /) -> bytes: ...
+
+
+class ZLibDecompressObjProtocol(Protocol):
+    def decompress(self, data: Buffer, max_length: int = ...) -> bytes: ...
+    def flush(self, length: int = ..., /) -> bytes: ...
+
+    @property
+    def eof(self) -> bool: ...
+
+
+class ZLibBackendProtocol(Protocol):
+    MAX_WBITS: int
+    Z_FULL_FLUSH: int
+    Z_SYNC_FLUSH: int
+    Z_BEST_SPEED: int
+    Z_FINISH: int
+
+    def compressobj(
+        self,
+        level: int = ...,
+        method: int = ...,
+        wbits: int = ...,
+        memLevel: int = ...,
+        strategy: int = ...,
+        zdict: Optional[Buffer] = ...,
+    ) -> ZLibCompressObjProtocol: ...
+    def decompressobj(
+        self, wbits: int = ..., zdict: Buffer = ...
+    ) -> ZLibDecompressObjProtocol: ...
+
+    def compress(
+        self, data: Buffer, /, level: int = ..., wbits: int = ...
+    ) -> bytes: ...
+    def decompress(
+        self, data: Buffer, /, wbits: int = ..., bufsize: int = ...
+    ) -> bytes: ...
+
+
+class CompressObjArgs(TypedDict, total=False):
+    wbits: int
+    strategy: int
+    level: int
+
+
+class ZLibBackendWrapper:
+    def __init__(self, _zlib_backend: ZLibBackendProtocol):
+        self._zlib_backend: ZLibBackendProtocol = _zlib_backend
+
+    @property
+    def name(self) -> str:
+        return getattr(self._zlib_backend, "__name__", "undefined")
+
+    @property
+    def MAX_WBITS(self) -> int:
+        return self._zlib_backend.MAX_WBITS
+
+    @property
+    def Z_FULL_FLUSH(self) -> int:
+        return self._zlib_backend.Z_FULL_FLUSH
+
+    @property
+    def Z_SYNC_FLUSH(self) -> int:
+        return self._zlib_backend.Z_SYNC_FLUSH
+
+    @property
+    def Z_BEST_SPEED(self) -> int:
+        return self._zlib_backend.Z_BEST_SPEED
+
+    @property
+    def Z_FINISH(self) -> int:
+        return self._zlib_backend.Z_FINISH
+
+    def compressobj(self, *args: Any, **kwargs: Any) -> ZLibCompressObjProtocol:
+        return self._zlib_backend.compressobj(*args, **kwargs)
+
+    def decompressobj(self, *args: Any, **kwargs: Any) -> ZLibDecompressObjProtocol:
+        return self._zlib_backend.decompressobj(*args, **kwargs)
+
+    def compress(self, data: Buffer, *args: Any, **kwargs: Any) -> bytes:
+        return self._zlib_backend.compress(data, *args, **kwargs)
+
+    def decompress(self, data: Buffer, *args: Any, **kwargs: Any) -> bytes:
+        return self._zlib_backend.decompress(data, *args, **kwargs)
+
+    # Everything not explicitly listed in the Protocol we just pass through
+    def __getattr__(self, attrname: str) -> Any:
+        return getattr(self._zlib_backend, attrname)
+
+
+ZLibBackend: ZLibBackendWrapper = ZLibBackendWrapper(zlib)
+
+
+def set_zlib_backend(new_zlib_backend: ZLibBackendProtocol) -> None:
+    ZLibBackend._zlib_backend = new_zlib_backend
+
+
+def encoding_to_mode(
+    encoding: Optional[str] = None,
+    suppress_deflate_header: bool = False,
+) -> int:
+    if encoding == "gzip":
+        return 16 + ZLibBackend.MAX_WBITS
+
+    return -ZLibBackend.MAX_WBITS if suppress_deflate_header else ZLibBackend.MAX_WBITS
+
+
+class ZlibBaseHandler:
+    def __init__(
+        self,
+        mode: int,
+        executor: Optional[Executor] = None,
+        max_sync_chunk_size: Optional[int] = MAX_SYNC_CHUNK_SIZE,
+    ):
+        self._mode = mode
+        self._executor = executor
+        self._max_sync_chunk_size = max_sync_chunk_size
+
+
+class ZLibCompressor(ZlibBaseHandler):
+    def __init__(
+        self,
+        encoding: Optional[str] = None,
+        suppress_deflate_header: bool = False,
+        level: Optional[int] = None,
+        wbits: Optional[int] = None,
+        strategy: Optional[int] = None,
+        executor: Optional[Executor] = None,
+        max_sync_chunk_size: Optional[int] = MAX_SYNC_CHUNK_SIZE,
+    ):
+        super().__init__(
+            mode=(
+                encoding_to_mode(encoding, suppress_deflate_header)
+                if wbits is None
+                else wbits
+            ),
+            executor=executor,
+            max_sync_chunk_size=max_sync_chunk_size,
+        )
+        self._zlib_backend: Final = ZLibBackendWrapper(ZLibBackend._zlib_backend)
+
+        kwargs: CompressObjArgs = {}
+        kwargs["wbits"] = self._mode
+        if strategy is not None:
+            kwargs["strategy"] = strategy
+        if level is not None:
+            kwargs["level"] = level
+        self._compressor = self._zlib_backend.compressobj(**kwargs)
+
+    def compress_sync(self, data: bytes) -> bytes:
+        return self._compressor.compress(data)
+
+    async def compress(self, data: bytes) -> bytes:
+        """Compress the data and returned the compressed bytes.
+
+        Note that flush() must be called after the last call to compress()
+
+        If the data size is large than the max_sync_chunk_size, the compression
+        will be done in the executor. Otherwise, the compression will be done
+        in the event loop.
+
+        **WARNING: This method is NOT cancellation-safe when used with flush().**
+        If this operation is cancelled, the compressor state may be corrupted.
+        The connection MUST be closed after cancellation to avoid data corruption
+        in subsequent compress operations.
+
+        For cancellation-safe compression (e.g., WebSocket), the caller MUST wrap
+        compress() + flush() + send operations in a shield and lock to ensure atomicity.
+        """
+        # For large payloads, offload compression to executor to avoid blocking event loop
+        should_use_executor = (
+            self._max_sync_chunk_size is not None
+            and len(data) > self._max_sync_chunk_size
+        )
+        if should_use_executor:
+            return await asyncio.get_running_loop().run_in_executor(
+                self._executor, self._compressor.compress, data
+            )
+        return self.compress_sync(data)
+
+    def flush(self, mode: Optional[int] = None) -> bytes:
+        """Flush the compressor synchronously.
+
+        **WARNING: This method is NOT cancellation-safe when called after compress().**
+        The flush() operation accesses shared compressor state. If compress() was
+        cancelled, calling flush() may result in corrupted data. The connection MUST
+        be closed after compress() cancellation.
+
+        For cancellation-safe compression (e.g., WebSocket), the caller MUST wrap
+        compress() + flush() + send operations in a shield and lock to ensure atomicity.
+        """
+        return self._compressor.flush(
+            mode if mode is not None else self._zlib_backend.Z_FINISH
+        )
+
+
+class ZLibDecompressor(ZlibBaseHandler):
+    def __init__(
+        self,
+        encoding: Optional[str] = None,
+        suppress_deflate_header: bool = False,
+        executor: Optional[Executor] = None,
+        max_sync_chunk_size: Optional[int] = MAX_SYNC_CHUNK_SIZE,
+    ):
+        super().__init__(
+            mode=encoding_to_mode(encoding, suppress_deflate_header),
+            executor=executor,
+            max_sync_chunk_size=max_sync_chunk_size,
+        )
+        self._zlib_backend: Final = ZLibBackendWrapper(ZLibBackend._zlib_backend)
+        self._decompressor = self._zlib_backend.decompressobj(wbits=self._mode)
+
+    def decompress_sync(self, data: bytes, max_length: int = 0) -> bytes:
+        return self._decompressor.decompress(data, max_length)
+
+    async def decompress(self, data: bytes, max_length: int = 0) -> bytes:
+        """Decompress the data and return the decompressed bytes.
+
+        If the data size is large than the max_sync_chunk_size, the decompression
+        will be done in the executor. Otherwise, the decompression will be done
+        in the event loop.
+        """
+        if (
+            self._max_sync_chunk_size is not None
+            and len(data) > self._max_sync_chunk_size
+        ):
+            return await asyncio.get_running_loop().run_in_executor(
+                self._executor, self._decompressor.decompress, data, max_length
+            )
+        return self.decompress_sync(data, max_length)
+
+    def flush(self, length: int = 0) -> bytes:
+        return (
+            self._decompressor.flush(length)
+            if length > 0
+            else self._decompressor.flush()
+        )
+
+    @property
+    def eof(self) -> bool:
+        return self._decompressor.eof
+
+
+class BrotliDecompressor:
+    # Supports both 'brotlipy' and 'Brotli' packages
+    # since they share an import name. The top branches
+    # are for 'brotlipy' and bottom branches for 'Brotli'
+    def __init__(self) -> None:
+        if not HAS_BROTLI:
+            raise RuntimeError(
+                "The brotli decompression is not available. "
+                "Please install `Brotli` module"
+            )
+        self._obj = brotli.Decompressor()
+
+    def decompress_sync(self, data: bytes) -> bytes:
+        if hasattr(self._obj, "decompress"):
+            return cast(bytes, self._obj.decompress(data))
+        return cast(bytes, self._obj.process(data))
+
+    def flush(self) -> bytes:
+        if hasattr(self._obj, "flush"):
+            return cast(bytes, self._obj.flush())
+        return b""
+
+
+class ZSTDDecompressor:
+    def __init__(self) -> None:
+        if not HAS_ZSTD:
+            raise RuntimeError(
+                "The zstd decompression is not available. "
+                "Please install `backports.zstd` module"
+            )
+        self._obj = ZstdDecompressor()
+
+    def decompress_sync(self, data: bytes) -> bytes:
+        return self._obj.decompress(data)
+
+    def flush(self) -> bytes:
+        return b""

backend_service/venv/lib/python3.13/site-packages/aiohttp/cookiejar.py

@@ -0,0 +1,522 @@
+import asyncio
+import calendar
+import contextlib
+import datetime
+import heapq
+import itertools
+import os  # noqa
+import pathlib
+import pickle
+import re
+import time
+import warnings
+from collections import defaultdict
+from collections.abc import Mapping
+from http.cookies import BaseCookie, Morsel, SimpleCookie
+from typing import (
+    DefaultDict,
+    Dict,
+    Iterable,
+    Iterator,
+    List,
+    Optional,
+    Set,
+    Tuple,
+    Union,
+)
+
+from yarl import URL
+
+from ._cookie_helpers import preserve_morsel_with_coded_value
+from .abc import AbstractCookieJar, ClearCookiePredicate
+from .helpers import is_ip_address
+from .typedefs import LooseCookies, PathLike, StrOrURL
+
+__all__ = ("CookieJar", "DummyCookieJar")
+
+
+CookieItem = Union[str, "Morsel[str]"]
+
+# We cache these string methods here as their use is in performance critical code.
+_FORMAT_PATH = "{}/{}".format
+_FORMAT_DOMAIN_REVERSED = "{1}.{0}".format
+
+# The minimum number of scheduled cookie expirations before we start cleaning up
+# the expiration heap. This is a performance optimization to avoid cleaning up the
+# heap too often when there are only a few scheduled expirations.
+_MIN_SCHEDULED_COOKIE_EXPIRATION = 100
+_SIMPLE_COOKIE = SimpleCookie()
+
+
+class CookieJar(AbstractCookieJar):
+    """Implements cookie storage adhering to RFC 6265."""
+
+    DATE_TOKENS_RE = re.compile(
+        r"[\x09\x20-\x2F\x3B-\x40\x5B-\x60\x7B-\x7E]*"
+        r"(?P<token>[\x00-\x08\x0A-\x1F\d:a-zA-Z\x7F-\xFF]+)"
+    )
+
+    DATE_HMS_TIME_RE = re.compile(r"(\d{1,2}):(\d{1,2}):(\d{1,2})")
+
+    DATE_DAY_OF_MONTH_RE = re.compile(r"(\d{1,2})")
+
+    DATE_MONTH_RE = re.compile(
+        "(jan)|(feb)|(mar)|(apr)|(may)|(jun)|(jul)|(aug)|(sep)|(oct)|(nov)|(dec)",
+        re.I,
+    )
+
+    DATE_YEAR_RE = re.compile(r"(\d{2,4})")
+
+    # calendar.timegm() fails for timestamps after datetime.datetime.max
+    # Minus one as a loss of precision occurs when timestamp() is called.
+    MAX_TIME = (
+        int(datetime.datetime.max.replace(tzinfo=datetime.timezone.utc).timestamp()) - 1
+    )
+    try:
+        calendar.timegm(time.gmtime(MAX_TIME))
+    except (OSError, ValueError):
+        # Hit the maximum representable time on Windows
+        # https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/localtime-localtime32-localtime64
+        # Throws ValueError on PyPy 3.9, OSError elsewhere
+        MAX_TIME = calendar.timegm((3000, 12, 31, 23, 59, 59, -1, -1, -1))
+    except OverflowError:
+        # #4515: datetime.max may not be representable on 32-bit platforms
+        MAX_TIME = 2**31 - 1
+    # Avoid minuses in the future, 3x faster
+    SUB_MAX_TIME = MAX_TIME - 1
+
+    def __init__(
+        self,
+        *,
+        unsafe: bool = False,
+        quote_cookie: bool = True,
+        treat_as_secure_origin: Union[StrOrURL, List[StrOrURL], None] = None,
+        loop: Optional[asyncio.AbstractEventLoop] = None,
+    ) -> None:
+        super().__init__(loop=loop)
+        self._cookies: DefaultDict[Tuple[str, str], SimpleCookie] = defaultdict(
+            SimpleCookie
+        )
+        self._morsel_cache: DefaultDict[Tuple[str, str], Dict[str, Morsel[str]]] = (
+            defaultdict(dict)
+        )
+        self._host_only_cookies: Set[Tuple[str, str]] = set()
+        self._unsafe = unsafe
+        self._quote_cookie = quote_cookie
+        if treat_as_secure_origin is None:
+            treat_as_secure_origin = []
+        elif isinstance(treat_as_secure_origin, URL):
+            treat_as_secure_origin = [treat_as_secure_origin.origin()]
+        elif isinstance(treat_as_secure_origin, str):
+            treat_as_secure_origin = [URL(treat_as_secure_origin).origin()]
+        else:
+            treat_as_secure_origin = [
+                URL(url).origin() if isinstance(url, str) else url.origin()
+                for url in treat_as_secure_origin
+            ]
+        self._treat_as_secure_origin = treat_as_secure_origin
+        self._expire_heap: List[Tuple[float, Tuple[str, str, str]]] = []
+        self._expirations: Dict[Tuple[str, str, str], float] = {}
+
+    @property
+    def quote_cookie(self) -> bool:
+        return self._quote_cookie
+
+    def save(self, file_path: PathLike) -> None:
+        file_path = pathlib.Path(file_path)
+        with file_path.open(mode="wb") as f:
+            pickle.dump(self._cookies, f, pickle.HIGHEST_PROTOCOL)
+
+    def load(self, file_path: PathLike) -> None:
+        file_path = pathlib.Path(file_path)
+        with file_path.open(mode="rb") as f:
+            self._cookies = pickle.load(f)
+
+    def clear(self, predicate: Optional[ClearCookiePredicate] = None) -> None:
+        if predicate is None:
+            self._expire_heap.clear()
+            self._cookies.clear()
+            self._morsel_cache.clear()
+            self._host_only_cookies.clear()
+            self._expirations.clear()
+            return
+
+        now = time.time()
+        to_del = [
+            key
+            for (domain, path), cookie in self._cookies.items()
+            for name, morsel in cookie.items()
+            if (
+                (key := (domain, path, name)) in self._expirations
+                and self._expirations[key] <= now
+            )
+            or predicate(morsel)
+        ]
+        if to_del:
+            self._delete_cookies(to_del)
+
+    def clear_domain(self, domain: str) -> None:
+        self.clear(lambda x: self._is_domain_match(domain, x["domain"]))
+
+    def __iter__(self) -> "Iterator[Morsel[str]]":
+        self._do_expiration()
+        for val in self._cookies.values():
+            yield from val.values()
+
+    def __len__(self) -> int:
+        """Return number of cookies.
+
+        This function does not iterate self to avoid unnecessary expiration
+        checks.
+        """
+        return sum(len(cookie.values()) for cookie in self._cookies.values())
+
+    def _do_expiration(self) -> None:
+        """Remove expired cookies."""
+        if not (expire_heap_len := len(self._expire_heap)):
+            return
+
+        # If the expiration heap grows larger than the number expirations
+        # times two, we clean it up to avoid keeping expired entries in
+        # the heap and consuming memory. We guard this with a minimum
+        # threshold to avoid cleaning up the heap too often when there are
+        # only a few scheduled expirations.
+        if (
+            expire_heap_len > _MIN_SCHEDULED_COOKIE_EXPIRATION
+            and expire_heap_len > len(self._expirations) * 2
+        ):
+            # Remove any expired entries from the expiration heap
+            # that do not match the expiration time in the expirations
+            # as it means the cookie has been re-added to the heap
+            # with a different expiration time.
+            self._expire_heap = [
+                entry
+                for entry in self._expire_heap
+                if self._expirations.get(entry[1]) == entry[0]
+            ]
+            heapq.heapify(self._expire_heap)
+
+        now = time.time()
+        to_del: List[Tuple[str, str, str]] = []
+        # Find any expired cookies and add them to the to-delete list
+        while self._expire_heap:
+            when, cookie_key = self._expire_heap[0]
+            if when > now:
+                break
+            heapq.heappop(self._expire_heap)
+            # Check if the cookie hasn't been re-added to the heap
+            # with a different expiration time as it will be removed
+            # later when it reaches the top of the heap and its
+            # expiration time is met.
+            if self._expirations.get(cookie_key) == when:
+                to_del.append(cookie_key)
+
+        if to_del:
+            self._delete_cookies(to_del)
+
+    def _delete_cookies(self, to_del: List[Tuple[str, str, str]]) -> None:
+        for domain, path, name in to_del:
+            self._host_only_cookies.discard((domain, name))
+            self._cookies[(domain, path)].pop(name, None)
+            self._morsel_cache[(domain, path)].pop(name, None)
+            self._expirations.pop((domain, path, name), None)
+
+    def _expire_cookie(self, when: float, domain: str, path: str, name: str) -> None:
+        cookie_key = (domain, path, name)
+        if self._expirations.get(cookie_key) == when:
+            # Avoid adding duplicates to the heap
+            return
+        heapq.heappush(self._expire_heap, (when, cookie_key))
+        self._expirations[cookie_key] = when
+
+    def update_cookies(self, cookies: LooseCookies, response_url: URL = URL()) -> None:
+        """Update cookies."""
+        hostname = response_url.raw_host
+
+        if not self._unsafe and is_ip_address(hostname):
+            # Don't accept cookies from IPs
+            return
+
+        if isinstance(cookies, Mapping):
+            cookies = cookies.items()
+
+        for name, cookie in cookies:
+            if not isinstance(cookie, Morsel):
+                tmp = SimpleCookie()
+                tmp[name] = cookie  # type: ignore[assignment]
+                cookie = tmp[name]
+
+            domain = cookie["domain"]
+
+            # ignore domains with trailing dots
+            if domain and domain[-1] == ".":
+                domain = ""
+                del cookie["domain"]
+
+            if not domain and hostname is not None:
+                # Set the cookie's domain to the response hostname
+                # and set its host-only-flag
+                self._host_only_cookies.add((hostname, name))
+                domain = cookie["domain"] = hostname
+
+            if domain and domain[0] == ".":
+                # Remove leading dot
+                domain = domain[1:]
+                cookie["domain"] = domain
+
+            if hostname and not self._is_domain_match(domain, hostname):
+                # Setting cookies for different domains is not allowed
+                continue
+
+            path = cookie["path"]
+            if not path or path[0] != "/":
+                # Set the cookie's path to the response path
+                path = response_url.path
+                if not path.startswith("/"):
+                    path = "/"
+                else:
+                    # Cut everything from the last slash to the end
+                    path = "/" + path[1 : path.rfind("/")]
+                cookie["path"] = path
+            path = path.rstrip("/")
+
+            if max_age := cookie["max-age"]:
+                try:
+                    delta_seconds = int(max_age)
+                    max_age_expiration = min(time.time() + delta_seconds, self.MAX_TIME)
+                    self._expire_cookie(max_age_expiration, domain, path, name)
+                except ValueError:
+                    cookie["max-age"] = ""
+
+            elif expires := cookie["expires"]:
+                if expire_time := self._parse_date(expires):
+                    self._expire_cookie(expire_time, domain, path, name)
+                else:
+                    cookie["expires"] = ""
+
+            key = (domain, path)
+            if self._cookies[key].get(name) != cookie:
+                # Don't blow away the cache if the same
+                # cookie gets set again
+                self._cookies[key][name] = cookie
+                self._morsel_cache[key].pop(name, None)
+
+        self._do_expiration()
+
+    def filter_cookies(self, request_url: URL = URL()) -> "BaseCookie[str]":
+        """Returns this jar's cookies filtered by their attributes."""
+        # We always use BaseCookie now since all
+        # cookies set on on filtered are fully constructed
+        # Morsels, not just names and values.
+        filtered: BaseCookie[str] = BaseCookie()
+        if not self._cookies:
+            # Skip do_expiration() if there are no cookies.
+            return filtered
+        self._do_expiration()
+        if not self._cookies:
+            # Skip rest of function if no non-expired cookies.
+            return filtered
+        if type(request_url) is not URL:
+            warnings.warn(
+                "filter_cookies expects yarl.URL instances only,"
+                f"and will stop working in 4.x, got {type(request_url)}",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+            request_url = URL(request_url)
+        hostname = request_url.raw_host or ""
+
+        is_not_secure = request_url.scheme not in ("https", "wss")
+        if is_not_secure and self._treat_as_secure_origin:
+            request_origin = URL()
+            with contextlib.suppress(ValueError):
+                request_origin = request_url.origin()
+            is_not_secure = request_origin not in self._treat_as_secure_origin
+
+        # Send shared cookie
+        key = ("", "")
+        for c in self._cookies[key].values():
+            # Check cache first
+            if c.key in self._morsel_cache[key]:
+                filtered[c.key] = self._morsel_cache[key][c.key]
+                continue
+
+            # Build and cache the morsel
+            mrsl_val = self._build_morsel(c)
+            self._morsel_cache[key][c.key] = mrsl_val
+            filtered[c.key] = mrsl_val
+
+        if is_ip_address(hostname):
+            if not self._unsafe:
+                return filtered
+            domains: Iterable[str] = (hostname,)
+        else:
+            # Get all the subdomains that might match a cookie (e.g. "foo.bar.com", "bar.com", "com")
+            domains = itertools.accumulate(
+                reversed(hostname.split(".")), _FORMAT_DOMAIN_REVERSED
+            )
+
+        # Get all the path prefixes that might match a cookie (e.g. "", "/foo", "/foo/bar")
+        paths = itertools.accumulate(request_url.path.split("/"), _FORMAT_PATH)
+        # Create every combination of (domain, path) pairs.
+        pairs = itertools.product(domains, paths)
+
+        path_len = len(request_url.path)
+        # Point 2: https://www.rfc-editor.org/rfc/rfc6265.html#section-5.4
+        for p in pairs:
+            if p not in self._cookies:
+                continue
+            for name, cookie in self._cookies[p].items():
+                domain = cookie["domain"]
+
+                if (domain, name) in self._host_only_cookies and domain != hostname:
+                    continue
+
+                # Skip edge case when the cookie has a trailing slash but request doesn't.
+                if len(cookie["path"]) > path_len:
+                    continue
+
+                if is_not_secure and cookie["secure"]:
+                    continue
+
+                # We already built the Morsel so reuse it here
+                if name in self._morsel_cache[p]:
+                    filtered[name] = self._morsel_cache[p][name]
+                    continue
+
+                # Build and cache the morsel
+                mrsl_val = self._build_morsel(cookie)
+                self._morsel_cache[p][name] = mrsl_val
+                filtered[name] = mrsl_val
+
+        return filtered
+
+    def _build_morsel(self, cookie: Morsel[str]) -> Morsel[str]:
+        """Build a morsel for sending, respecting quote_cookie setting."""
+        if self._quote_cookie and cookie.coded_value and cookie.coded_value[0] == '"':
+            return preserve_morsel_with_coded_value(cookie)
+        morsel: Morsel[str] = Morsel()
+        if self._quote_cookie:
+            value, coded_value = _SIMPLE_COOKIE.value_encode(cookie.value)
+        else:
+            coded_value = value = cookie.value
+        # We use __setstate__ instead of the public set() API because it allows us to
+        # bypass validation and set already validated state. This is more stable than
+        # setting protected attributes directly and unlikely to change since it would
+        # break pickling.
+        morsel.__setstate__({"key": cookie.key, "value": value, "coded_value": coded_value})  # type: ignore[attr-defined]
+        return morsel
+
+    @staticmethod
+    def _is_domain_match(domain: str, hostname: str) -> bool:
+        """Implements domain matching adhering to RFC 6265."""
+        if hostname == domain:
+            return True
+
+        if not hostname.endswith(domain):
+            return False
+
+        non_matching = hostname[: -len(domain)]
+
+        if not non_matching.endswith("."):
+            return False
+
+        return not is_ip_address(hostname)
+
+    @classmethod
+    def _parse_date(cls, date_str: str) -> Optional[int]:
+        """Implements date string parsing adhering to RFC 6265."""
+        if not date_str:
+            return None
+
+        found_time = False
+        found_day = False
+        found_month = False
+        found_year = False
+
+        hour = minute = second = 0
+        day = 0
+        month = 0
+        year = 0
+
+        for token_match in cls.DATE_TOKENS_RE.finditer(date_str):
+
+            token = token_match.group("token")
+
+            if not found_time:
+                time_match = cls.DATE_HMS_TIME_RE.match(token)
+                if time_match:
+                    found_time = True
+                    hour, minute, second = (int(s) for s in time_match.groups())
+                    continue
+
+            if not found_day:
+                day_match = cls.DATE_DAY_OF_MONTH_RE.match(token)
+                if day_match:
+                    found_day = True
+                    day = int(day_match.group())
+                    continue
+
+            if not found_month:
+                month_match = cls.DATE_MONTH_RE.match(token)
+                if month_match:
+                    found_month = True
+                    assert month_match.lastindex is not None
+                    month = month_match.lastindex
+                    continue
+
+            if not found_year:
+                year_match = cls.DATE_YEAR_RE.match(token)
+                if year_match:
+                    found_year = True
+                    year = int(year_match.group())
+
+        if 70 <= year <= 99:
+            year += 1900
+        elif 0 <= year <= 69:
+            year += 2000
+
+        if False in (found_day, found_month, found_year, found_time):
+            return None
+
+        if not 1 <= day <= 31:
+            return None
+
+        if year < 1601 or hour > 23 or minute > 59 or second > 59:
+            return None
+
+        return calendar.timegm((year, month, day, hour, minute, second, -1, -1, -1))
+
+
+class DummyCookieJar(AbstractCookieJar):
+    """Implements a dummy cookie storage.
+
+    It can be used with the ClientSession when no cookie processing is needed.
+
+    """
+
+    def __init__(self, *, loop: Optional[asyncio.AbstractEventLoop] = None) -> None:
+        super().__init__(loop=loop)
+
+    def __iter__(self) -> "Iterator[Morsel[str]]":
+        while False:
+            yield None
+
+    def __len__(self) -> int:
+        return 0
+
+    @property
+    def quote_cookie(self) -> bool:
+        return True
+
+    def clear(self, predicate: Optional[ClearCookiePredicate] = None) -> None:
+        pass
+
+    def clear_domain(self, domain: str) -> None:
+        pass
+
+    def update_cookies(self, cookies: LooseCookies, response_url: URL = URL()) -> None:
+        pass
+
+    def filter_cookies(self, request_url: URL) -> "BaseCookie[str]":
+        return SimpleCookie()

backend_service/venv/lib/python3.13/site-packages/aiohttp/formdata.py

@@ -0,0 +1,179 @@
+import io
+import warnings
+from typing import Any, Iterable, List, Optional
+from urllib.parse import urlencode
+
+from multidict import MultiDict, MultiDictProxy
+
+from . import hdrs, multipart, payload
+from .helpers import guess_filename
+from .payload import Payload
+
+__all__ = ("FormData",)
+
+
+class FormData:
+    """Helper class for form body generation.
+
+    Supports multipart/form-data and application/x-www-form-urlencoded.
+    """
+
+    def __init__(
+        self,
+        fields: Iterable[Any] = (),
+        quote_fields: bool = True,
+        charset: Optional[str] = None,
+        *,
+        default_to_multipart: bool = False,
+    ) -> None:
+        self._writer = multipart.MultipartWriter("form-data")
+        self._fields: List[Any] = []
+        self._is_multipart = default_to_multipart
+        self._quote_fields = quote_fields
+        self._charset = charset
+
+        if isinstance(fields, dict):
+            fields = list(fields.items())
+        elif not isinstance(fields, (list, tuple)):
+            fields = (fields,)
+        self.add_fields(*fields)
+
+    @property
+    def is_multipart(self) -> bool:
+        return self._is_multipart
+
+    def add_field(
+        self,
+        name: str,
+        value: Any,
+        *,
+        content_type: Optional[str] = None,
+        filename: Optional[str] = None,
+        content_transfer_encoding: Optional[str] = None,
+    ) -> None:
+
+        if isinstance(value, io.IOBase):
+            self._is_multipart = True
+        elif isinstance(value, (bytes, bytearray, memoryview)):
+            msg = (
+                "In v4, passing bytes will no longer create a file field. "
+                "Please explicitly use the filename parameter or pass a BytesIO object."
+            )
+            if filename is None and content_transfer_encoding is None:
+                warnings.warn(msg, DeprecationWarning)
+                filename = name
+
+        type_options: MultiDict[str] = MultiDict({"name": name})
+        if filename is not None and not isinstance(filename, str):
+            raise TypeError("filename must be an instance of str. Got: %s" % filename)
+        if filename is None and isinstance(value, io.IOBase):
+            filename = guess_filename(value, name)
+        if filename is not None:
+            type_options["filename"] = filename
+            self._is_multipart = True
+
+        headers = {}
+        if content_type is not None:
+            if not isinstance(content_type, str):
+                raise TypeError(
+                    "content_type must be an instance of str. Got: %s" % content_type
+                )
+            headers[hdrs.CONTENT_TYPE] = content_type
+            self._is_multipart = True
+        if content_transfer_encoding is not None:
+            if not isinstance(content_transfer_encoding, str):
+                raise TypeError(
+                    "content_transfer_encoding must be an instance"
+                    " of str. Got: %s" % content_transfer_encoding
+                )
+            msg = (
+                "content_transfer_encoding is deprecated. "
+                "To maintain compatibility with v4 please pass a BytesPayload."
+            )
+            warnings.warn(msg, DeprecationWarning)
+            self._is_multipart = True
+
+        self._fields.append((type_options, headers, value))
+
+    def add_fields(self, *fields: Any) -> None:
+        to_add = list(fields)
+
+        while to_add:
+            rec = to_add.pop(0)
+
+            if isinstance(rec, io.IOBase):
+                k = guess_filename(rec, "unknown")
+                self.add_field(k, rec)  # type: ignore[arg-type]
+
+            elif isinstance(rec, (MultiDictProxy, MultiDict)):
+                to_add.extend(rec.items())
+
+            elif isinstance(rec, (list, tuple)) and len(rec) == 2:
+                k, fp = rec
+                self.add_field(k, fp)
+
+            else:
+                raise TypeError(
+                    "Only io.IOBase, multidict and (name, file) "
+                    "pairs allowed, use .add_field() for passing "
+                    "more complex parameters, got {!r}".format(rec)
+                )
+
+    def _gen_form_urlencoded(self) -> payload.BytesPayload:
+        # form data (x-www-form-urlencoded)
+        data = []
+        for type_options, _, value in self._fields:
+            data.append((type_options["name"], value))
+
+        charset = self._charset if self._charset is not None else "utf-8"
+
+        if charset == "utf-8":
+            content_type = "application/x-www-form-urlencoded"
+        else:
+            content_type = "application/x-www-form-urlencoded; charset=%s" % charset
+
+        return payload.BytesPayload(
+            urlencode(data, doseq=True, encoding=charset).encode(),
+            content_type=content_type,
+        )
+
+    def _gen_form_data(self) -> multipart.MultipartWriter:
+        """Encode a list of fields using the multipart/form-data MIME format"""
+        for dispparams, headers, value in self._fields:
+            try:
+                if hdrs.CONTENT_TYPE in headers:
+                    part = payload.get_payload(
+                        value,
+                        content_type=headers[hdrs.CONTENT_TYPE],
+                        headers=headers,
+                        encoding=self._charset,
+                    )
+                else:
+                    part = payload.get_payload(
+                        value, headers=headers, encoding=self._charset
+                    )
+            except Exception as exc:
+                raise TypeError(
+                    "Can not serialize value type: %r\n "
+                    "headers: %r\n value: %r" % (type(value), headers, value)
+                ) from exc
+
+            if dispparams:
+                part.set_content_disposition(
+                    "form-data", quote_fields=self._quote_fields, **dispparams
+                )
+                # FIXME cgi.FieldStorage doesn't likes body parts with
+                # Content-Length which were sent via chunked transfer encoding
+                assert part.headers is not None
+                part.headers.popall(hdrs.CONTENT_LENGTH, None)
+
+            self._writer.append_payload(part)
+
+        self._fields.clear()
+        return self._writer
+
+    def __call__(self) -> Payload:
+        if self._is_multipart:
+            return self._gen_form_data()
+        else:
+            return self._gen_form_urlencoded()

backend_service/venv/lib/python3.13/site-packages/aiohttp/hdrs.py

@@ -0,0 +1,121 @@
+"""HTTP Headers constants."""
+
+# After changing the file content call ./tools/gen.py
+# to regenerate the headers parser
+import itertools
+from typing import Final, Set
+
+from multidict import istr
+
+METH_ANY: Final[str] = "*"
+METH_CONNECT: Final[str] = "CONNECT"
+METH_HEAD: Final[str] = "HEAD"
+METH_GET: Final[str] = "GET"
+METH_DELETE: Final[str] = "DELETE"
+METH_OPTIONS: Final[str] = "OPTIONS"
+METH_PATCH: Final[str] = "PATCH"
+METH_POST: Final[str] = "POST"
+METH_PUT: Final[str] = "PUT"
+METH_TRACE: Final[str] = "TRACE"
+
+METH_ALL: Final[Set[str]] = {
+    METH_CONNECT,
+    METH_HEAD,
+    METH_GET,
+    METH_DELETE,
+    METH_OPTIONS,
+    METH_PATCH,
+    METH_POST,
+    METH_PUT,
+    METH_TRACE,
+}
+
+ACCEPT: Final[istr] = istr("Accept")
+ACCEPT_CHARSET: Final[istr] = istr("Accept-Charset")
+ACCEPT_ENCODING: Final[istr] = istr("Accept-Encoding")
+ACCEPT_LANGUAGE: Final[istr] = istr("Accept-Language")
+ACCEPT_RANGES: Final[istr] = istr("Accept-Ranges")
+ACCESS_CONTROL_MAX_AGE: Final[istr] = istr("Access-Control-Max-Age")
+ACCESS_CONTROL_ALLOW_CREDENTIALS: Final[istr] = istr("Access-Control-Allow-Credentials")
+ACCESS_CONTROL_ALLOW_HEADERS: Final[istr] = istr("Access-Control-Allow-Headers")
+ACCESS_CONTROL_ALLOW_METHODS: Final[istr] = istr("Access-Control-Allow-Methods")
+ACCESS_CONTROL_ALLOW_ORIGIN: Final[istr] = istr("Access-Control-Allow-Origin")
+ACCESS_CONTROL_EXPOSE_HEADERS: Final[istr] = istr("Access-Control-Expose-Headers")
+ACCESS_CONTROL_REQUEST_HEADERS: Final[istr] = istr("Access-Control-Request-Headers")
+ACCESS_CONTROL_REQUEST_METHOD: Final[istr] = istr("Access-Control-Request-Method")
+AGE: Final[istr] = istr("Age")
+ALLOW: Final[istr] = istr("Allow")
+AUTHORIZATION: Final[istr] = istr("Authorization")
+CACHE_CONTROL: Final[istr] = istr("Cache-Control")
+CONNECTION: Final[istr] = istr("Connection")
+CONTENT_DISPOSITION: Final[istr] = istr("Content-Disposition")
+CONTENT_ENCODING: Final[istr] = istr("Content-Encoding")
+CONTENT_LANGUAGE: Final[istr] = istr("Content-Language")
+CONTENT_LENGTH: Final[istr] = istr("Content-Length")
+CONTENT_LOCATION: Final[istr] = istr("Content-Location")
+CONTENT_MD5: Final[istr] = istr("Content-MD5")
+CONTENT_RANGE: Final[istr] = istr("Content-Range")
+CONTENT_TRANSFER_ENCODING: Final[istr] = istr("Content-Transfer-Encoding")
+CONTENT_TYPE: Final[istr] = istr("Content-Type")
+COOKIE: Final[istr] = istr("Cookie")
+DATE: Final[istr] = istr("Date")
+DESTINATION: Final[istr] = istr("Destination")
+DIGEST: Final[istr] = istr("Digest")
+ETAG: Final[istr] = istr("Etag")
+EXPECT: Final[istr] = istr("Expect")
+EXPIRES: Final[istr] = istr("Expires")
+FORWARDED: Final[istr] = istr("Forwarded")
+FROM: Final[istr] = istr("From")
+HOST: Final[istr] = istr("Host")
+IF_MATCH: Final[istr] = istr("If-Match")
+IF_MODIFIED_SINCE: Final[istr] = istr("If-Modified-Since")
+IF_NONE_MATCH: Final[istr] = istr("If-None-Match")
+IF_RANGE: Final[istr] = istr("If-Range")
+IF_UNMODIFIED_SINCE: Final[istr] = istr("If-Unmodified-Since")
+KEEP_ALIVE: Final[istr] = istr("Keep-Alive")
+LAST_EVENT_ID: Final[istr] = istr("Last-Event-ID")
+LAST_MODIFIED: Final[istr] = istr("Last-Modified")
+LINK: Final[istr] = istr("Link")
+LOCATION: Final[istr] = istr("Location")
+MAX_FORWARDS: Final[istr] = istr("Max-Forwards")
+ORIGIN: Final[istr] = istr("Origin")
+PRAGMA: Final[istr] = istr("Pragma")
+PROXY_AUTHENTICATE: Final[istr] = istr("Proxy-Authenticate")
+PROXY_AUTHORIZATION: Final[istr] = istr("Proxy-Authorization")
+RANGE: Final[istr] = istr("Range")
+REFERER: Final[istr] = istr("Referer")
+RETRY_AFTER: Final[istr] = istr("Retry-After")
+SEC_WEBSOCKET_ACCEPT: Final[istr] = istr("Sec-WebSocket-Accept")
+SEC_WEBSOCKET_VERSION: Final[istr] = istr("Sec-WebSocket-Version")
+SEC_WEBSOCKET_PROTOCOL: Final[istr] = istr("Sec-WebSocket-Protocol")
+SEC_WEBSOCKET_EXTENSIONS: Final[istr] = istr("Sec-WebSocket-Extensions")
+SEC_WEBSOCKET_KEY: Final[istr] = istr("Sec-WebSocket-Key")
+SEC_WEBSOCKET_KEY1: Final[istr] = istr("Sec-WebSocket-Key1")
+SERVER: Final[istr] = istr("Server")
+SET_COOKIE: Final[istr] = istr("Set-Cookie")
+TE: Final[istr] = istr("TE")
+TRAILER: Final[istr] = istr("Trailer")
+TRANSFER_ENCODING: Final[istr] = istr("Transfer-Encoding")
+UPGRADE: Final[istr] = istr("Upgrade")
+URI: Final[istr] = istr("URI")
+USER_AGENT: Final[istr] = istr("User-Agent")
+VARY: Final[istr] = istr("Vary")
+VIA: Final[istr] = istr("Via")
+WANT_DIGEST: Final[istr] = istr("Want-Digest")
+WARNING: Final[istr] = istr("Warning")
+WWW_AUTHENTICATE: Final[istr] = istr("WWW-Authenticate")
+X_FORWARDED_FOR: Final[istr] = istr("X-Forwarded-For")
+X_FORWARDED_HOST: Final[istr] = istr("X-Forwarded-Host")
+X_FORWARDED_PROTO: Final[istr] = istr("X-Forwarded-Proto")
+
+# These are the upper/lower case variants of the headers/methods
+# Example: {'hOst', 'host', 'HoST', 'HOSt', 'hOsT', 'HosT', 'hoSt', ...}
+METH_HEAD_ALL: Final = frozenset(
+    map("".join, itertools.product(*zip(METH_HEAD.upper(), METH_HEAD.lower())))
+)
+METH_CONNECT_ALL: Final = frozenset(
+    map("".join, itertools.product(*zip(METH_CONNECT.upper(), METH_CONNECT.lower())))
+)
+HOST_ALL: Final = frozenset(
+    map("".join, itertools.product(*zip(HOST.upper(), HOST.lower())))
+)

backend_service/venv/lib/python3.13/site-packages/aiohttp/helpers.py

@@ -0,0 +1,986 @@
+"""Various helper functions"""
+
+import asyncio
+import base64
+import binascii
+import contextlib
+import datetime
+import enum
+import functools
+import inspect
+import netrc
+import os
+import platform
+import re
+import sys
+import time
+import weakref
+from collections import namedtuple
+from contextlib import suppress
+from email.message import EmailMessage
+from email.parser import HeaderParser
+from email.policy import HTTP
+from email.utils import parsedate
+from math import ceil
+from pathlib import Path
+from types import MappingProxyType, TracebackType
+from typing import (
+    Any,
+    Callable,
+    ContextManager,
+    Dict,
+    Generator,
+    Generic,
+    Iterable,
+    Iterator,
+    List,
+    Mapping,
+    Optional,
+    Protocol,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+    get_args,
+    overload,
+)
+from urllib.parse import quote
+from urllib.request import getproxies, proxy_bypass
+
+import attr
+from multidict import MultiDict, MultiDictProxy, MultiMapping
+from propcache.api import under_cached_property as reify
+from yarl import URL
+
+from . import hdrs
+from .log import client_logger
+
+if sys.version_info >= (3, 11):
+    import asyncio as async_timeout
+else:
+    import async_timeout
+
+__all__ = ("BasicAuth", "ChainMapProxy", "ETag", "reify")
+
+IS_MACOS = platform.system() == "Darwin"
+IS_WINDOWS = platform.system() == "Windows"
+
+PY_310 = sys.version_info >= (3, 10)
+PY_311 = sys.version_info >= (3, 11)
+
+
+_T = TypeVar("_T")
+_S = TypeVar("_S")
+
+_SENTINEL = enum.Enum("_SENTINEL", "sentinel")
+sentinel = _SENTINEL.sentinel
+
+NO_EXTENSIONS = bool(os.environ.get("AIOHTTP_NO_EXTENSIONS"))
+
+# https://datatracker.ietf.org/doc/html/rfc9112#section-6.3-2.1
+EMPTY_BODY_STATUS_CODES = frozenset((204, 304, *range(100, 200)))
+# https://datatracker.ietf.org/doc/html/rfc9112#section-6.3-2.1
+# https://datatracker.ietf.org/doc/html/rfc9112#section-6.3-2.2
+EMPTY_BODY_METHODS = hdrs.METH_HEAD_ALL
+
+DEBUG = sys.flags.dev_mode or (
+    not sys.flags.ignore_environment and bool(os.environ.get("PYTHONASYNCIODEBUG"))
+)
+
+
+CHAR = {chr(i) for i in range(0, 128)}
+CTL = {chr(i) for i in range(0, 32)} | {
+    chr(127),
+}
+SEPARATORS = {
+    "(",
+    ")",
+    "<",
+    ">",
+    "@",
+    ",",
+    ";",
+    ":",
+    "\\",
+    '"',
+    "/",
+    "[",
+    "]",
+    "?",
+    "=",
+    "{",
+    "}",
+    " ",
+    chr(9),
+}
+TOKEN = CHAR ^ CTL ^ SEPARATORS
+
+
+class noop:
+    def __await__(self) -> Generator[None, None, None]:
+        yield
+
+
+class BasicAuth(namedtuple("BasicAuth", ["login", "password", "encoding"])):
+    """Http basic authentication helper."""
+
+    def __new__(
+        cls, login: str, password: str = "", encoding: str = "latin1"
+    ) -> "BasicAuth":
+        if login is None:
+            raise ValueError("None is not allowed as login value")
+
+        if password is None:
+            raise ValueError("None is not allowed as password value")
+
+        if ":" in login:
+            raise ValueError('A ":" is not allowed in login (RFC 1945#section-11.1)')
+
+        return super().__new__(cls, login, password, encoding)
+
+    @classmethod
+    def decode(cls, auth_header: str, encoding: str = "latin1") -> "BasicAuth":
+        """Create a BasicAuth object from an Authorization HTTP header."""
+        try:
+            auth_type, encoded_credentials = auth_header.split(" ", 1)
+        except ValueError:
+            raise ValueError("Could not parse authorization header.")
+
+        if auth_type.lower() != "basic":
+            raise ValueError("Unknown authorization method %s" % auth_type)
+
+        try:
+            decoded = base64.b64decode(
+                encoded_credentials.encode("ascii"), validate=True
+            ).decode(encoding)
+        except binascii.Error:
+            raise ValueError("Invalid base64 encoding.")
+
+        try:
+            # RFC 2617 HTTP Authentication
+            # https://www.ietf.org/rfc/rfc2617.txt
+            # the colon must be present, but the username and password may be
+            # otherwise blank.
+            username, password = decoded.split(":", 1)
+        except ValueError:
+            raise ValueError("Invalid credentials.")
+
+        return cls(username, password, encoding=encoding)
+
+    @classmethod
+    def from_url(cls, url: URL, *, encoding: str = "latin1") -> Optional["BasicAuth"]:
+        """Create BasicAuth from url."""
+        if not isinstance(url, URL):
+            raise TypeError("url should be yarl.URL instance")
+        # Check raw_user and raw_password first as yarl is likely
+        # to already have these values parsed from the netloc in the cache.
+        if url.raw_user is None and url.raw_password is None:
+            return None
+        return cls(url.user or "", url.password or "", encoding=encoding)
+
+    def encode(self) -> str:
+        """Encode credentials."""
+        creds = (f"{self.login}:{self.password}").encode(self.encoding)
+        return "Basic %s" % base64.b64encode(creds).decode(self.encoding)
+
+
+def strip_auth_from_url(url: URL) -> Tuple[URL, Optional[BasicAuth]]:
+    """Remove user and password from URL if present and return BasicAuth object."""
+    # Check raw_user and raw_password first as yarl is likely
+    # to already have these values parsed from the netloc in the cache.
+    if url.raw_user is None and url.raw_password is None:
+        return url, None
+    return url.with_user(None), BasicAuth(url.user or "", url.password or "")
+
+
+def netrc_from_env() -> Optional[netrc.netrc]:
+    """Load netrc from file.
+
+    Attempt to load it from the path specified by the env-var
+    NETRC or in the default location in the user's home directory.
+
+    Returns None if it couldn't be found or fails to parse.
+    """
+    netrc_env = os.environ.get("NETRC")
+
+    if netrc_env is not None:
+        netrc_path = Path(netrc_env)
+    else:
+        try:
+            home_dir = Path.home()
+        except RuntimeError as e:  # pragma: no cover
+            # if pathlib can't resolve home, it may raise a RuntimeError
+            client_logger.debug(
+                "Could not resolve home directory when "
+                "trying to look for .netrc file: %s",
+                e,
+            )
+            return None
+
+        netrc_path = home_dir / ("_netrc" if IS_WINDOWS else ".netrc")
+
+    try:
+        return netrc.netrc(str(netrc_path))
+    except netrc.NetrcParseError as e:
+        client_logger.warning("Could not parse .netrc file: %s", e)
+    except OSError as e:
+        netrc_exists = False
+        with contextlib.suppress(OSError):
+            netrc_exists = netrc_path.is_file()
+        # we couldn't read the file (doesn't exist, permissions, etc.)
+        if netrc_env or netrc_exists:
+            # only warn if the environment wanted us to load it,
+            # or it appears like the default file does actually exist
+            client_logger.warning("Could not read .netrc file: %s", e)
+
+    return None
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class ProxyInfo:
+    proxy: URL
+    proxy_auth: Optional[BasicAuth]
+
+
+def basicauth_from_netrc(netrc_obj: Optional[netrc.netrc], host: str) -> BasicAuth:
+    """
+    Return :py:class:`~aiohttp.BasicAuth` credentials for ``host`` from ``netrc_obj``.
+
+    :raises LookupError: if ``netrc_obj`` is :py:data:`None` or if no
+            entry is found for the ``host``.
+    """
+    if netrc_obj is None:
+        raise LookupError("No .netrc file found")
+    auth_from_netrc = netrc_obj.authenticators(host)
+
+    if auth_from_netrc is None:
+        raise LookupError(f"No entry for {host!s} found in the `.netrc` file.")
+    login, account, password = auth_from_netrc
+
+    # TODO(PY311): username = login or account
+    # Up to python 3.10, account could be None if not specified,
+    # and login will be empty string if not specified. From 3.11,
+    # login and account will be empty string if not specified.
+    username = login if (login or account is None) else account
+
+    # TODO(PY311): Remove this, as password will be empty string
+    # if not specified
+    if password is None:
+        password = ""
+
+    return BasicAuth(username, password)
+
+
+def proxies_from_env() -> Dict[str, ProxyInfo]:
+    proxy_urls = {
+        k: URL(v)
+        for k, v in getproxies().items()
+        if k in ("http", "https", "ws", "wss")
+    }
+    netrc_obj = netrc_from_env()
+    stripped = {k: strip_auth_from_url(v) for k, v in proxy_urls.items()}
+    ret = {}
+    for proto, val in stripped.items():
+        proxy, auth = val
+        if proxy.scheme in ("https", "wss"):
+            client_logger.warning(
+                "%s proxies %s are not supported, ignoring", proxy.scheme.upper(), proxy
+            )
+            continue
+        if netrc_obj and auth is None:
+            if proxy.host is not None:
+                try:
+                    auth = basicauth_from_netrc(netrc_obj, proxy.host)
+                except LookupError:
+                    auth = None
+        ret[proto] = ProxyInfo(proxy, auth)
+    return ret
+
+
+def get_env_proxy_for_url(url: URL) -> Tuple[URL, Optional[BasicAuth]]:
+    """Get a permitted proxy for the given URL from the env."""
+    if url.host is not None and proxy_bypass(url.host):
+        raise LookupError(f"Proxying is disallowed for `{url.host!r}`")
+
+    proxies_in_env = proxies_from_env()
+    try:
+        proxy_info = proxies_in_env[url.scheme]
+    except KeyError:
+        raise LookupError(f"No proxies found for `{url!s}` in the env")
+    else:
+        return proxy_info.proxy, proxy_info.proxy_auth
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class MimeType:
+    type: str
+    subtype: str
+    suffix: str
+    parameters: "MultiDictProxy[str]"
+
+
+@functools.lru_cache(maxsize=56)
+def parse_mimetype(mimetype: str) -> MimeType:
+    """Parses a MIME type into its components.
+
+    mimetype is a MIME type string.
+
+    Returns a MimeType object.
+
+    Example:
+
+    >>> parse_mimetype('text/html; charset=utf-8')
+    MimeType(type='text', subtype='html', suffix='',
+             parameters={'charset': 'utf-8'})
+
+    """
+    if not mimetype:
+        return MimeType(
+            type="", subtype="", suffix="", parameters=MultiDictProxy(MultiDict())
+        )
+
+    parts = mimetype.split(";")
+    params: MultiDict[str] = MultiDict()
+    for item in parts[1:]:
+        if not item:
+            continue
+        key, _, value = item.partition("=")
+        params.add(key.lower().strip(), value.strip(' "'))
+
+    fulltype = parts[0].strip().lower()
+    if fulltype == "*":
+        fulltype = "*/*"
+
+    mtype, _, stype = fulltype.partition("/")
+    stype, _, suffix = stype.partition("+")
+
+    return MimeType(
+        type=mtype, subtype=stype, suffix=suffix, parameters=MultiDictProxy(params)
+    )
+
+
+class EnsureOctetStream(EmailMessage):
+    def __init__(self) -> None:
+        super().__init__()
+        # https://www.rfc-editor.org/rfc/rfc9110#section-8.3-5
+        self.set_default_type("application/octet-stream")
+
+    def get_content_type(self) -> str:
+        """Re-implementation from Message
+
+        Returns application/octet-stream in place of plain/text when
+        value is wrong.
+
+        The way this class is used guarantees that content-type will
+        be present so simplify the checks wrt to the base implementation.
+        """
+        value = self.get("content-type", "").lower()
+
+        # Based on the implementation of _splitparam in the standard library
+        ctype, _, _ = value.partition(";")
+        ctype = ctype.strip()
+        if ctype.count("/") != 1:
+            return self.get_default_type()
+        return ctype
+
+
+@functools.lru_cache(maxsize=56)
+def parse_content_type(raw: str) -> Tuple[str, MappingProxyType[str, str]]:
+    """Parse Content-Type header.
+
+    Returns a tuple of the parsed content type and a
+    MappingProxyType of parameters. The default returned value
+    is `application/octet-stream`
+    """
+    msg = HeaderParser(EnsureOctetStream, policy=HTTP).parsestr(f"Content-Type: {raw}")
+    content_type = msg.get_content_type()
+    params = msg.get_params(())
+    content_dict = dict(params[1:])  # First element is content type again
+    return content_type, MappingProxyType(content_dict)
+
+
+def guess_filename(obj: Any, default: Optional[str] = None) -> Optional[str]:
+    name = getattr(obj, "name", None)
+    if name and isinstance(name, str) and name[0] != "<" and name[-1] != ">":
+        return Path(name).name
+    return default
+
+
+not_qtext_re = re.compile(r"[^\041\043-\133\135-\176]")
+QCONTENT = {chr(i) for i in range(0x20, 0x7F)} | {"\t"}
+
+
+def quoted_string(content: str) -> str:
+    """Return 7-bit content as quoted-string.
+
+    Format content into a quoted-string as defined in RFC5322 for
+    Internet Message Format. Notice that this is not the 8-bit HTTP
+    format, but the 7-bit email format. Content must be in usascii or
+    a ValueError is raised.
+    """
+    if not (QCONTENT > set(content)):
+        raise ValueError(f"bad content for quoted-string {content!r}")
+    return not_qtext_re.sub(lambda x: "\\" + x.group(0), content)
+
+
+def content_disposition_header(
+    disptype: str, quote_fields: bool = True, _charset: str = "utf-8", **params: str
+) -> str:
+    """Sets ``Content-Disposition`` header for MIME.
+
+    This is the MIME payload Content-Disposition header from RFC 2183
+    and RFC 7579 section 4.2, not the HTTP Content-Disposition from
+    RFC 6266.
+
+    disptype is a disposition type: inline, attachment, form-data.
+    Should be valid extension token (see RFC 2183)
+
+    quote_fields performs value quoting to 7-bit MIME headers
+    according to RFC 7578. Set to quote_fields to False if recipient
+    can take 8-bit file names and field values.
+
+    _charset specifies the charset to use when quote_fields is True.
+
+    params is a dict with disposition params.
+    """
+    if not disptype or not (TOKEN > set(disptype)):
+        raise ValueError(f"bad content disposition type {disptype!r}")
+
+    value = disptype
+    if params:
+        lparams = []
+        for key, val in params.items():
+            if not key or not (TOKEN > set(key)):
+                raise ValueError(f"bad content disposition parameter {key!r}={val!r}")
+            if quote_fields:
+                if key.lower() == "filename":
+                    qval = quote(val, "", encoding=_charset)
+                    lparams.append((key, '"%s"' % qval))
+                else:
+                    try:
+                        qval = quoted_string(val)
+                    except ValueError:
+                        qval = "".join(
+                            (_charset, "''", quote(val, "", encoding=_charset))
+                        )
+                        lparams.append((key + "*", qval))
+                    else:
+                        lparams.append((key, '"%s"' % qval))
+            else:
+                qval = val.replace("\\", "\\\\").replace('"', '\\"')
+                lparams.append((key, '"%s"' % qval))
+        sparams = "; ".join("=".join(pair) for pair in lparams)
+        value = "; ".join((value, sparams))
+    return value
+
+
+def is_ip_address(host: Optional[str]) -> bool:
+    """Check if host looks like an IP Address.
+
+    This check is only meant as a heuristic to ensure that
+    a host is not a domain name.
+    """
+    if not host:
+        return False
+    # For a host to be an ipv4 address, it must be all numeric.
+    # The host must contain a colon to be an IPv6 address.
+    return ":" in host or host.replace(".", "").isdigit()
+
+
+_cached_current_datetime: Optional[int] = None
+_cached_formatted_datetime = ""
+
+
+def rfc822_formatted_time() -> str:
+    global _cached_current_datetime
+    global _cached_formatted_datetime
+
+    now = int(time.time())
+    if now != _cached_current_datetime:
+        # Weekday and month names for HTTP date/time formatting;
+        # always English!
+        # Tuples are constants stored in codeobject!
+        _weekdayname = ("Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun")
+        _monthname = (
+            "",  # Dummy so we can use 1-based month numbers
+            "Jan",
+            "Feb",
+            "Mar",
+            "Apr",
+            "May",
+            "Jun",
+            "Jul",
+            "Aug",
+            "Sep",
+            "Oct",
+            "Nov",
+            "Dec",
+        )
+
+        year, month, day, hh, mm, ss, wd, *tail = time.gmtime(now)
+        _cached_formatted_datetime = "%s, %02d %3s %4d %02d:%02d:%02d GMT" % (
+            _weekdayname[wd],
+            day,
+            _monthname[month],
+            year,
+            hh,
+            mm,
+            ss,
+        )
+        _cached_current_datetime = now
+    return _cached_formatted_datetime
+
+
+def _weakref_handle(info: "Tuple[weakref.ref[object], str]") -> None:
+    ref, name = info
+    ob = ref()
+    if ob is not None:
+        with suppress(Exception):
+            getattr(ob, name)()
+
+
+def weakref_handle(
+    ob: object,
+    name: str,
+    timeout: float,
+    loop: asyncio.AbstractEventLoop,
+    timeout_ceil_threshold: float = 5,
+) -> Optional[asyncio.TimerHandle]:
+    if timeout is not None and timeout > 0:
+        when = loop.time() + timeout
+        if timeout >= timeout_ceil_threshold:
+            when = ceil(when)
+
+        return loop.call_at(when, _weakref_handle, (weakref.ref(ob), name))
+    return None
+
+
+def call_later(
+    cb: Callable[[], Any],
+    timeout: float,
+    loop: asyncio.AbstractEventLoop,
+    timeout_ceil_threshold: float = 5,
+) -> Optional[asyncio.TimerHandle]:
+    if timeout is None or timeout <= 0:
+        return None
+    now = loop.time()
+    when = calculate_timeout_when(now, timeout, timeout_ceil_threshold)
+    return loop.call_at(when, cb)
+
+
+def calculate_timeout_when(
+    loop_time: float,
+    timeout: float,
+    timeout_ceiling_threshold: float,
+) -> float:
+    """Calculate when to execute a timeout."""
+    when = loop_time + timeout
+    if timeout > timeout_ceiling_threshold:
+        return ceil(when)
+    return when
+
+
+class TimeoutHandle:
+    """Timeout handle"""
+
+    __slots__ = ("_timeout", "_loop", "_ceil_threshold", "_callbacks")
+
+    def __init__(
+        self,
+        loop: asyncio.AbstractEventLoop,
+        timeout: Optional[float],
+        ceil_threshold: float = 5,
+    ) -> None:
+        self._timeout = timeout
+        self._loop = loop
+        self._ceil_threshold = ceil_threshold
+        self._callbacks: List[
+            Tuple[Callable[..., None], Tuple[Any, ...], Dict[str, Any]]
+        ] = []
+
+    def register(
+        self, callback: Callable[..., None], *args: Any, **kwargs: Any
+    ) -> None:
+        self._callbacks.append((callback, args, kwargs))
+
+    def close(self) -> None:
+        self._callbacks.clear()
+
+    def start(self) -> Optional[asyncio.TimerHandle]:
+        timeout = self._timeout
+        if timeout is not None and timeout > 0:
+            when = self._loop.time() + timeout
+            if timeout >= self._ceil_threshold:
+                when = ceil(when)
+            return self._loop.call_at(when, self.__call__)
+        else:
+            return None
+
+    def timer(self) -> "BaseTimerContext":
+        if self._timeout is not None and self._timeout > 0:
+            timer = TimerContext(self._loop)
+            self.register(timer.timeout)
+            return timer
+        else:
+            return TimerNoop()
+
+    def __call__(self) -> None:
+        for cb, args, kwargs in self._callbacks:
+            with suppress(Exception):
+                cb(*args, **kwargs)
+
+        self._callbacks.clear()
+
+
+class BaseTimerContext(ContextManager["BaseTimerContext"]):
+
+    __slots__ = ()
+
+    def assert_timeout(self) -> None:
+        """Raise TimeoutError if timeout has been exceeded."""
+
+
+class TimerNoop(BaseTimerContext):
+
+    __slots__ = ()
+
+    def __enter__(self) -> BaseTimerContext:
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        return
+
+
+class TimerContext(BaseTimerContext):
+    """Low resolution timeout context manager"""
+
+    __slots__ = ("_loop", "_tasks", "_cancelled", "_cancelling")
+
+    def __init__(self, loop: asyncio.AbstractEventLoop) -> None:
+        self._loop = loop
+        self._tasks: List[asyncio.Task[Any]] = []
+        self._cancelled = False
+        self._cancelling = 0
+
+    def assert_timeout(self) -> None:
+        """Raise TimeoutError if timer has already been cancelled."""
+        if self._cancelled:
+            raise asyncio.TimeoutError from None
+
+    def __enter__(self) -> BaseTimerContext:
+        task = asyncio.current_task(loop=self._loop)
+        if task is None:
+            raise RuntimeError("Timeout context manager should be used inside a task")
+
+        if sys.version_info >= (3, 11):
+            # Remember if the task was already cancelling
+            # so when we __exit__ we can decide if we should
+            # raise asyncio.TimeoutError or let the cancellation propagate
+            self._cancelling = task.cancelling()
+
+        if self._cancelled:
+            raise asyncio.TimeoutError from None
+
+        self._tasks.append(task)
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> Optional[bool]:
+        enter_task: Optional[asyncio.Task[Any]] = None
+        if self._tasks:
+            enter_task = self._tasks.pop()
+
+        if exc_type is asyncio.CancelledError and self._cancelled:
+            assert enter_task is not None
+            # The timeout was hit, and the task was cancelled
+            # so we need to uncancel the last task that entered the context manager
+            # since the cancellation should not leak out of the context manager
+            if sys.version_info >= (3, 11):
+                # If the task was already cancelling don't raise
+                # asyncio.TimeoutError and instead return None
+                # to allow the cancellation to propagate
+                if enter_task.uncancel() > self._cancelling:
+                    return None
+            raise asyncio.TimeoutError from exc_val
+        return None
+
+    def timeout(self) -> None:
+        if not self._cancelled:
+            for task in set(self._tasks):
+                task.cancel()
+
+            self._cancelled = True
+
+
+def ceil_timeout(
+    delay: Optional[float], ceil_threshold: float = 5
+) -> async_timeout.Timeout:
+    if delay is None or delay <= 0:
+        return async_timeout.timeout(None)
+
+    loop = asyncio.get_running_loop()
+    now = loop.time()
+    when = now + delay
+    if delay > ceil_threshold:
+        when = ceil(when)
+    return async_timeout.timeout_at(when)
+
+
+class HeadersMixin:
+    """Mixin for handling headers."""
+
+    ATTRS = frozenset(["_content_type", "_content_dict", "_stored_content_type"])
+
+    _headers: MultiMapping[str]
+    _content_type: Optional[str] = None
+    _content_dict: Optional[Dict[str, str]] = None
+    _stored_content_type: Union[str, None, _SENTINEL] = sentinel
+
+    def _parse_content_type(self, raw: Optional[str]) -> None:
+        self._stored_content_type = raw
+        if raw is None:
+            # default value according to RFC 2616
+            self._content_type = "application/octet-stream"
+            self._content_dict = {}
+        else:
+            content_type, content_mapping_proxy = parse_content_type(raw)
+            self._content_type = content_type
+            # _content_dict needs to be mutable so we can update it
+            self._content_dict = content_mapping_proxy.copy()
+
+    @property
+    def content_type(self) -> str:
+        """The value of content part for Content-Type HTTP header."""
+        raw = self._headers.get(hdrs.CONTENT_TYPE)
+        if self._stored_content_type != raw:
+            self._parse_content_type(raw)
+        assert self._content_type is not None
+        return self._content_type
+
+    @property
+    def charset(self) -> Optional[str]:
+        """The value of charset part for Content-Type HTTP header."""
+        raw = self._headers.get(hdrs.CONTENT_TYPE)
+        if self._stored_content_type != raw:
+            self._parse_content_type(raw)
+        assert self._content_dict is not None
+        return self._content_dict.get("charset")
+
+    @property
+    def content_length(self) -> Optional[int]:
+        """The value of Content-Length HTTP header."""
+        content_length = self._headers.get(hdrs.CONTENT_LENGTH)
+        return None if content_length is None else int(content_length)
+
+
+def set_result(fut: "asyncio.Future[_T]", result: _T) -> None:
+    if not fut.done():
+        fut.set_result(result)
+
+
+_EXC_SENTINEL = BaseException()
+
+
+class ErrorableProtocol(Protocol):
+    def set_exception(
+        self,
+        exc: BaseException,
+        exc_cause: BaseException = ...,
+    ) -> None: ...  # pragma: no cover
+
+
+def set_exception(
+    fut: "asyncio.Future[_T] | ErrorableProtocol",
+    exc: BaseException,
+    exc_cause: BaseException = _EXC_SENTINEL,
+) -> None:
+    """Set future exception.
+
+    If the future is marked as complete, this function is a no-op.
+
+    :param exc_cause: An exception that is a direct cause of ``exc``.
+                      Only set if provided.
+    """
+    if asyncio.isfuture(fut) and fut.done():
+        return
+
+    exc_is_sentinel = exc_cause is _EXC_SENTINEL
+    exc_causes_itself = exc is exc_cause
+    if not exc_is_sentinel and not exc_causes_itself:
+        exc.__cause__ = exc_cause
+
+    fut.set_exception(exc)
+
+
+@functools.total_ordering
+class AppKey(Generic[_T]):
+    """Keys for static typing support in Application."""
+
+    __slots__ = ("_name", "_t", "__orig_class__")
+
+    # This may be set by Python when instantiating with a generic type. We need to
+    # support this, in order to support types that are not concrete classes,
+    # like Iterable, which can't be passed as the second parameter to __init__.
+    __orig_class__: Type[object]
+
+    def __init__(self, name: str, t: Optional[Type[_T]] = None):
+        # Prefix with module name to help deduplicate key names.
+        frame = inspect.currentframe()
+        while frame:
+            if frame.f_code.co_name == "<module>":
+                module: str = frame.f_globals["__name__"]
+                break
+            frame = frame.f_back
+
+        self._name = module + "." + name
+        self._t = t
+
+    def __lt__(self, other: object) -> bool:
+        if isinstance(other, AppKey):
+            return self._name < other._name
+        return True  # Order AppKey above other types.
+
+    def __repr__(self) -> str:
+        t = self._t
+        if t is None:
+            with suppress(AttributeError):
+                # Set to type arg.
+                t = get_args(self.__orig_class__)[0]
+
+        if t is None:
+            t_repr = "<<Unknown>>"
+        elif isinstance(t, type):
+            if t.__module__ == "builtins":
+                t_repr = t.__qualname__
+            else:
+                t_repr = f"{t.__module__}.{t.__qualname__}"
+        else:
+            t_repr = repr(t)
+        return f"<AppKey({self._name}, type={t_repr})>"
+
+
+class ChainMapProxy(Mapping[Union[str, AppKey[Any]], Any]):
+    __slots__ = ("_maps",)
+
+    def __init__(self, maps: Iterable[Mapping[Union[str, AppKey[Any]], Any]]) -> None:
+        self._maps = tuple(maps)
+
+    def __init_subclass__(cls) -> None:
+        raise TypeError(
+            "Inheritance class {} from ChainMapProxy "
+            "is forbidden".format(cls.__name__)
+        )
+
+    @overload  # type: ignore[override]
+    def __getitem__(self, key: AppKey[_T]) -> _T: ...
+
+    @overload
+    def __getitem__(self, key: str) -> Any: ...
+
+    def __getitem__(self, key: Union[str, AppKey[_T]]) -> Any:
+        for mapping in self._maps:
+            try:
+                return mapping[key]
+            except KeyError:
+                pass
+        raise KeyError(key)
+
+    @overload  # type: ignore[override]
+    def get(self, key: AppKey[_T], default: _S) -> Union[_T, _S]: ...
+
+    @overload
+    def get(self, key: AppKey[_T], default: None = ...) -> Optional[_T]: ...
+
+    @overload
+    def get(self, key: str, default: Any = ...) -> Any: ...
+
+    def get(self, key: Union[str, AppKey[_T]], default: Any = None) -> Any:
+        try:
+            return self[key]
+        except KeyError:
+            return default
+
+    def __len__(self) -> int:
+        # reuses stored hash values if possible
+        return len(set().union(*self._maps))
+
+    def __iter__(self) -> Iterator[Union[str, AppKey[Any]]]:
+        d: Dict[Union[str, AppKey[Any]], Any] = {}
+        for mapping in reversed(self._maps):
+            # reuses stored hash values if possible
+            d.update(mapping)
+        return iter(d)
+
+    def __contains__(self, key: object) -> bool:
+        return any(key in m for m in self._maps)
+
+    def __bool__(self) -> bool:
+        return any(self._maps)
+
+    def __repr__(self) -> str:
+        content = ", ".join(map(repr, self._maps))
+        return f"ChainMapProxy({content})"
+
+
+# https://tools.ietf.org/html/rfc7232#section-2.3
+_ETAGC = r"[!\x23-\x7E\x80-\xff]+"
+_ETAGC_RE = re.compile(_ETAGC)
+_QUOTED_ETAG = rf'(W/)?"({_ETAGC})"'
+QUOTED_ETAG_RE = re.compile(_QUOTED_ETAG)
+LIST_QUOTED_ETAG_RE = re.compile(rf"({_QUOTED_ETAG})(?:\s*,\s*|$)|(.)")
+
+ETAG_ANY = "*"
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class ETag:
+    value: str
+    is_weak: bool = False
+
+
+def validate_etag_value(value: str) -> None:
+    if value != ETAG_ANY and not _ETAGC_RE.fullmatch(value):
+        raise ValueError(
+            f"Value {value!r} is not a valid etag. Maybe it contains '\"'?"
+        )
+
+
+def parse_http_date(date_str: Optional[str]) -> Optional[datetime.datetime]:
+    """Process a date string, return a datetime object"""
+    if date_str is not None:
+        timetuple = parsedate(date_str)
+        if timetuple is not None:
+            with suppress(ValueError):
+                return datetime.datetime(*timetuple[:6], tzinfo=datetime.timezone.utc)
+    return None
+
+
+@functools.lru_cache
+def must_be_empty_body(method: str, code: int) -> bool:
+    """Check if a request must return an empty body."""
+    return (
+        code in EMPTY_BODY_STATUS_CODES
+        or method in EMPTY_BODY_METHODS
+        or (200 <= code < 300 and method in hdrs.METH_CONNECT_ALL)
+    )
+
+
+def should_remove_content_length(method: str, code: int) -> bool:
+    """Check if a Content-Length header should be removed.
+
+    This should always be a subset of must_be_empty_body
+    """
+    # https://www.rfc-editor.org/rfc/rfc9110.html#section-8.6-8
+    # https://www.rfc-editor.org/rfc/rfc9110.html#section-15.4.5-4
+    return code in EMPTY_BODY_STATUS_CODES or (
+        200 <= code < 300 and method in hdrs.METH_CONNECT_ALL
+    )

backend_service/venv/lib/python3.13/site-packages/aiohttp/http.py

@@ -0,0 +1,72 @@
+import sys
+from http import HTTPStatus
+from typing import Mapping, Tuple
+
+from . import __version__
+from .http_exceptions import HttpProcessingError as HttpProcessingError
+from .http_parser import (
+    HeadersParser as HeadersParser,
+    HttpParser as HttpParser,
+    HttpRequestParser as HttpRequestParser,
+    HttpResponseParser as HttpResponseParser,
+    RawRequestMessage as RawRequestMessage,
+    RawResponseMessage as RawResponseMessage,
+)
+from .http_websocket import (
+    WS_CLOSED_MESSAGE as WS_CLOSED_MESSAGE,
+    WS_CLOSING_MESSAGE as WS_CLOSING_MESSAGE,
+    WS_KEY as WS_KEY,
+    WebSocketError as WebSocketError,
+    WebSocketReader as WebSocketReader,
+    WebSocketWriter as WebSocketWriter,
+    WSCloseCode as WSCloseCode,
+    WSMessage as WSMessage,
+    WSMsgType as WSMsgType,
+    ws_ext_gen as ws_ext_gen,
+    ws_ext_parse as ws_ext_parse,
+)
+from .http_writer import (
+    HttpVersion as HttpVersion,
+    HttpVersion10 as HttpVersion10,
+    HttpVersion11 as HttpVersion11,
+    StreamWriter as StreamWriter,
+)
+
+__all__ = (
+    "HttpProcessingError",
+    "RESPONSES",
+    "SERVER_SOFTWARE",
+    # .http_writer
+    "StreamWriter",
+    "HttpVersion",
+    "HttpVersion10",
+    "HttpVersion11",
+    # .http_parser
+    "HeadersParser",
+    "HttpParser",
+    "HttpRequestParser",
+    "HttpResponseParser",
+    "RawRequestMessage",
+    "RawResponseMessage",
+    # .http_websocket
+    "WS_CLOSED_MESSAGE",
+    "WS_CLOSING_MESSAGE",
+    "WS_KEY",
+    "WebSocketReader",
+    "WebSocketWriter",
+    "ws_ext_gen",
+    "ws_ext_parse",
+    "WSMessage",
+    "WebSocketError",
+    "WSMsgType",
+    "WSCloseCode",
+)
+
+
+SERVER_SOFTWARE: str = "Python/{0[0]}.{0[1]} aiohttp/{1}".format(
+    sys.version_info, __version__
+)
+
+RESPONSES: Mapping[int, Tuple[str, str]] = {
+    v: (v.phrase, v.description) for v in HTTPStatus.__members__.values()
+}

backend_service/venv/lib/python3.13/site-packages/aiohttp/http_exceptions.py

@@ -0,0 +1,112 @@
+"""Low-level http related exceptions."""
+
+from textwrap import indent
+from typing import Optional, Union
+
+from .typedefs import _CIMultiDict
+
+__all__ = ("HttpProcessingError",)
+
+
+class HttpProcessingError(Exception):
+    """HTTP error.
+
+    Shortcut for raising HTTP errors with custom code, message and headers.
+
+    code: HTTP Error code.
+    message: (optional) Error message.
+    headers: (optional) Headers to be sent in response, a list of pairs
+    """
+
+    code = 0
+    message = ""
+    headers = None
+
+    def __init__(
+        self,
+        *,
+        code: Optional[int] = None,
+        message: str = "",
+        headers: Optional[_CIMultiDict] = None,
+    ) -> None:
+        if code is not None:
+            self.code = code
+        self.headers = headers
+        self.message = message
+
+    def __str__(self) -> str:
+        msg = indent(self.message, "  ")
+        return f"{self.code}, message:\n{msg}"
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__}: {self.code}, message={self.message!r}>"
+
+
+class BadHttpMessage(HttpProcessingError):
+
+    code = 400
+    message = "Bad Request"
+
+    def __init__(self, message: str, *, headers: Optional[_CIMultiDict] = None) -> None:
+        super().__init__(message=message, headers=headers)
+        self.args = (message,)
+
+
+class HttpBadRequest(BadHttpMessage):
+
+    code = 400
+    message = "Bad Request"
+
+
+class PayloadEncodingError(BadHttpMessage):
+    """Base class for payload errors"""
+
+
+class ContentEncodingError(PayloadEncodingError):
+    """Content encoding error."""
+
+
+class TransferEncodingError(PayloadEncodingError):
+    """transfer encoding error."""
+
+
+class ContentLengthError(PayloadEncodingError):
+    """Not enough data to satisfy content length header."""
+
+
+class LineTooLong(BadHttpMessage):
+    def __init__(
+        self, line: str, limit: str = "Unknown", actual_size: str = "Unknown"
+    ) -> None:
+        super().__init__(
+            f"Got more than {limit} bytes ({actual_size}) when reading {line}."
+        )
+        self.args = (line, limit, actual_size)
+
+
+class InvalidHeader(BadHttpMessage):
+    def __init__(self, hdr: Union[bytes, str]) -> None:
+        hdr_s = hdr.decode(errors="backslashreplace") if isinstance(hdr, bytes) else hdr
+        super().__init__(f"Invalid HTTP header: {hdr!r}")
+        self.hdr = hdr_s
+        self.args = (hdr,)
+
+
+class BadStatusLine(BadHttpMessage):
+    def __init__(self, line: str = "", error: Optional[str] = None) -> None:
+        if not isinstance(line, str):
+            line = repr(line)
+        super().__init__(error or f"Bad status line {line!r}")
+        self.args = (line,)
+        self.line = line
+
+
+class BadHttpMethod(BadStatusLine):
+    """Invalid HTTP method in status line."""
+
+    def __init__(self, line: str = "", error: Optional[str] = None) -> None:
+        super().__init__(line, error or f"Bad HTTP method in status line {line!r}")
+
+
+class InvalidURLError(BadHttpMessage):
+    pass

backend_service/venv/lib/python3.13/site-packages/aiohttp/http_websocket.py

@@ -0,0 +1,36 @@
+"""WebSocket protocol versions 13 and 8."""
+
+from ._websocket.helpers import WS_KEY, ws_ext_gen, ws_ext_parse
+from ._websocket.models import (
+    WS_CLOSED_MESSAGE,
+    WS_CLOSING_MESSAGE,
+    WebSocketError,
+    WSCloseCode,
+    WSHandshakeError,
+    WSMessage,
+    WSMsgType,
+)
+from ._websocket.reader import WebSocketReader
+from ._websocket.writer import WebSocketWriter
+
+# Messages that the WebSocketResponse.receive needs to handle internally
+_INTERNAL_RECEIVE_TYPES = frozenset(
+    (WSMsgType.CLOSE, WSMsgType.CLOSING, WSMsgType.PING, WSMsgType.PONG)
+)
+
+
+__all__ = (
+    "WS_CLOSED_MESSAGE",
+    "WS_CLOSING_MESSAGE",
+    "WS_KEY",
+    "WebSocketReader",
+    "WebSocketWriter",
+    "WSMessage",
+    "WebSocketError",
+    "WSMsgType",
+    "WSCloseCode",
+    "ws_ext_gen",
+    "ws_ext_parse",
+    "WSHandshakeError",
+    "WSMessage",
+)

backend_service/venv/lib/python3.13/site-packages/aiohttp/http_writer.py

@@ -0,0 +1,378 @@
+"""Http related parsers and protocol."""
+
+import asyncio
+import sys
+from typing import (  # noqa
+    TYPE_CHECKING,
+    Any,
+    Awaitable,
+    Callable,
+    Iterable,
+    List,
+    NamedTuple,
+    Optional,
+    Union,
+)
+
+from multidict import CIMultiDict
+
+from .abc import AbstractStreamWriter
+from .base_protocol import BaseProtocol
+from .client_exceptions import ClientConnectionResetError
+from .compression_utils import ZLibCompressor
+from .helpers import NO_EXTENSIONS
+
+__all__ = ("StreamWriter", "HttpVersion", "HttpVersion10", "HttpVersion11")
+
+
+MIN_PAYLOAD_FOR_WRITELINES = 2048
+IS_PY313_BEFORE_313_2 = (3, 13, 0) <= sys.version_info < (3, 13, 2)
+IS_PY_BEFORE_312_9 = sys.version_info < (3, 12, 9)
+SKIP_WRITELINES = IS_PY313_BEFORE_313_2 or IS_PY_BEFORE_312_9
+# writelines is not safe for use
+# on Python 3.12+ until 3.12.9
+# on Python 3.13+ until 3.13.2
+# and on older versions it not any faster than write
+# CVE-2024-12254: https://github.com/python/cpython/pull/127656
+
+
+class HttpVersion(NamedTuple):
+    major: int
+    minor: int
+
+
+HttpVersion10 = HttpVersion(1, 0)
+HttpVersion11 = HttpVersion(1, 1)
+
+
+_T_OnChunkSent = Optional[Callable[[bytes], Awaitable[None]]]
+_T_OnHeadersSent = Optional[Callable[["CIMultiDict[str]"], Awaitable[None]]]
+
+
+class StreamWriter(AbstractStreamWriter):
+
+    length: Optional[int] = None
+    chunked: bool = False
+    _eof: bool = False
+    _compress: Optional[ZLibCompressor] = None
+
+    def __init__(
+        self,
+        protocol: BaseProtocol,
+        loop: asyncio.AbstractEventLoop,
+        on_chunk_sent: _T_OnChunkSent = None,
+        on_headers_sent: _T_OnHeadersSent = None,
+    ) -> None:
+        self._protocol = protocol
+        self.loop = loop
+        self._on_chunk_sent: _T_OnChunkSent = on_chunk_sent
+        self._on_headers_sent: _T_OnHeadersSent = on_headers_sent
+        self._headers_buf: Optional[bytes] = None
+        self._headers_written: bool = False
+
+    @property
+    def transport(self) -> Optional[asyncio.Transport]:
+        return self._protocol.transport
+
+    @property
+    def protocol(self) -> BaseProtocol:
+        return self._protocol
+
+    def enable_chunking(self) -> None:
+        self.chunked = True
+
+    def enable_compression(
+        self, encoding: str = "deflate", strategy: Optional[int] = None
+    ) -> None:
+        self._compress = ZLibCompressor(encoding=encoding, strategy=strategy)
+
+    def _write(self, chunk: Union[bytes, bytearray, memoryview]) -> None:
+        size = len(chunk)
+        self.buffer_size += size
+        self.output_size += size
+        transport = self._protocol.transport
+        if transport is None or transport.is_closing():
+            raise ClientConnectionResetError("Cannot write to closing transport")
+        transport.write(chunk)
+
+    def _writelines(self, chunks: Iterable[bytes]) -> None:
+        size = 0
+        for chunk in chunks:
+            size += len(chunk)
+        self.buffer_size += size
+        self.output_size += size
+        transport = self._protocol.transport
+        if transport is None or transport.is_closing():
+            raise ClientConnectionResetError("Cannot write to closing transport")
+        if SKIP_WRITELINES or size < MIN_PAYLOAD_FOR_WRITELINES:
+            transport.write(b"".join(chunks))
+        else:
+            transport.writelines(chunks)
+
+    def _write_chunked_payload(
+        self, chunk: Union[bytes, bytearray, "memoryview[int]", "memoryview[bytes]"]
+    ) -> None:
+        """Write a chunk with proper chunked encoding."""
+        chunk_len_pre = f"{len(chunk):x}\r\n".encode("ascii")
+        self._writelines((chunk_len_pre, chunk, b"\r\n"))
+
+    def _send_headers_with_payload(
+        self,
+        chunk: Union[bytes, bytearray, "memoryview[int]", "memoryview[bytes]"],
+        is_eof: bool,
+    ) -> None:
+        """Send buffered headers with payload, coalescing into single write."""
+        # Mark headers as written
+        self._headers_written = True
+        headers_buf = self._headers_buf
+        self._headers_buf = None
+
+        if TYPE_CHECKING:
+            # Safe because callers (write() and write_eof()) only invoke this method
+            # after checking that self._headers_buf is truthy
+            assert headers_buf is not None
+
+        if not self.chunked:
+            # Non-chunked: coalesce headers with body
+            if chunk:
+                self._writelines((headers_buf, chunk))
+            else:
+                self._write(headers_buf)
+            return
+
+        # Coalesce headers with chunked data
+        if chunk:
+            chunk_len_pre = f"{len(chunk):x}\r\n".encode("ascii")
+            if is_eof:
+                self._writelines((headers_buf, chunk_len_pre, chunk, b"\r\n0\r\n\r\n"))
+            else:
+                self._writelines((headers_buf, chunk_len_pre, chunk, b"\r\n"))
+        elif is_eof:
+            self._writelines((headers_buf, b"0\r\n\r\n"))
+        else:
+            self._write(headers_buf)
+
+    async def write(
+        self,
+        chunk: Union[bytes, bytearray, memoryview],
+        *,
+        drain: bool = True,
+        LIMIT: int = 0x10000,
+    ) -> None:
+        """
+        Writes chunk of data to a stream.
+
+        write_eof() indicates end of stream.
+        writer can't be used after write_eof() method being called.
+        write() return drain future.
+        """
+        if self._on_chunk_sent is not None:
+            await self._on_chunk_sent(chunk)
+
+        if isinstance(chunk, memoryview):
+            if chunk.nbytes != len(chunk):
+                # just reshape it
+                chunk = chunk.cast("c")
+
+        if self._compress is not None:
+            chunk = await self._compress.compress(chunk)
+            if not chunk:
+                return
+
+        if self.length is not None:
+            chunk_len = len(chunk)
+            if self.length >= chunk_len:
+                self.length = self.length - chunk_len
+            else:
+                chunk = chunk[: self.length]
+                self.length = 0
+                if not chunk:
+                    return
+
+        # Handle buffered headers for small payload optimization
+        if self._headers_buf and not self._headers_written:
+            self._send_headers_with_payload(chunk, False)
+            if drain and self.buffer_size > LIMIT:
+                self.buffer_size = 0
+                await self.drain()
+            return
+
+        if chunk:
+            if self.chunked:
+                self._write_chunked_payload(chunk)
+            else:
+                self._write(chunk)
+
+            if drain and self.buffer_size > LIMIT:
+                self.buffer_size = 0
+                await self.drain()
+
+    async def write_headers(
+        self, status_line: str, headers: "CIMultiDict[str]"
+    ) -> None:
+        """Write headers to the stream."""
+        if self._on_headers_sent is not None:
+            await self._on_headers_sent(headers)
+        # status + headers
+        buf = _serialize_headers(status_line, headers)
+        self._headers_written = False
+        self._headers_buf = buf
+
+    def send_headers(self) -> None:
+        """Force sending buffered headers if not already sent."""
+        if not self._headers_buf or self._headers_written:
+            return
+
+        self._headers_written = True
+        headers_buf = self._headers_buf
+        self._headers_buf = None
+
+        if TYPE_CHECKING:
+            # Safe because we only enter this block when self._headers_buf is truthy
+            assert headers_buf is not None
+
+        self._write(headers_buf)
+
+    def set_eof(self) -> None:
+        """Indicate that the message is complete."""
+        if self._eof:
+            return
+
+        # If headers haven't been sent yet, send them now
+        # This handles the case where there's no body at all
+        if self._headers_buf and not self._headers_written:
+            self._headers_written = True
+            headers_buf = self._headers_buf
+            self._headers_buf = None
+
+            if TYPE_CHECKING:
+                # Safe because we only enter this block when self._headers_buf is truthy
+                assert headers_buf is not None
+
+            # Combine headers and chunked EOF marker in a single write
+            if self.chunked:
+                self._writelines((headers_buf, b"0\r\n\r\n"))
+            else:
+                self._write(headers_buf)
+        elif self.chunked and self._headers_written:
+            # Headers already sent, just send the final chunk marker
+            self._write(b"0\r\n\r\n")
+
+        self._eof = True
+
+    async def write_eof(self, chunk: bytes = b"") -> None:
+        if self._eof:
+            return
+
+        if chunk and self._on_chunk_sent is not None:
+            await self._on_chunk_sent(chunk)
+
+        # Handle body/compression
+        if self._compress:
+            chunks: List[bytes] = []
+            chunks_len = 0
+            if chunk and (compressed_chunk := await self._compress.compress(chunk)):
+                chunks_len = len(compressed_chunk)
+                chunks.append(compressed_chunk)
+
+            flush_chunk = self._compress.flush()
+            chunks_len += len(flush_chunk)
+            chunks.append(flush_chunk)
+            assert chunks_len
+
+            # Send buffered headers with compressed data if not yet sent
+            if self._headers_buf and not self._headers_written:
+                self._headers_written = True
+                headers_buf = self._headers_buf
+                self._headers_buf = None
+
+                if self.chunked:
+                    # Coalesce headers with compressed chunked data
+                    chunk_len_pre = f"{chunks_len:x}\r\n".encode("ascii")
+                    self._writelines(
+                        (headers_buf, chunk_len_pre, *chunks, b"\r\n0\r\n\r\n")
+                    )
+                else:
+                    # Coalesce headers with compressed data
+                    self._writelines((headers_buf, *chunks))
+                await self.drain()
+                self._eof = True
+                return
+
+            # Headers already sent, just write compressed data
+            if self.chunked:
+                chunk_len_pre = f"{chunks_len:x}\r\n".encode("ascii")
+                self._writelines((chunk_len_pre, *chunks, b"\r\n0\r\n\r\n"))
+            elif len(chunks) > 1:
+                self._writelines(chunks)
+            else:
+                self._write(chunks[0])
+            await self.drain()
+            self._eof = True
+            return
+
+        # No compression - send buffered headers if not yet sent
+        if self._headers_buf and not self._headers_written:
+            # Use helper to send headers with payload
+            self._send_headers_with_payload(chunk, True)
+            await self.drain()
+            self._eof = True
+            return
+
+        # Handle remaining body
+        if self.chunked:
+            if chunk:
+                # Write final chunk with EOF marker
+                self._writelines(
+                    (f"{len(chunk):x}\r\n".encode("ascii"), chunk, b"\r\n0\r\n\r\n")
+                )
+            else:
+                self._write(b"0\r\n\r\n")
+            await self.drain()
+            self._eof = True
+            return
+
+        if chunk:
+            self._write(chunk)
+            await self.drain()
+
+        self._eof = True
+
+    async def drain(self) -> None:
+        """Flush the write buffer.
+
+        The intended use is to write
+
+          await w.write(data)
+          await w.drain()
+        """
+        protocol = self._protocol
+        if protocol.transport is not None and protocol._paused:
+            await protocol._drain_helper()
+
+
+def _safe_header(string: str) -> str:
+    if "\r" in string or "\n" in string:
+        raise ValueError(
+            "Newline or carriage return detected in headers. "
+            "Potential header injection attack."
+        )
+    return string
+
+
+def _py_serialize_headers(status_line: str, headers: "CIMultiDict[str]") -> bytes:
+    headers_gen = (_safe_header(k) + ": " + _safe_header(v) for k, v in headers.items())
+    line = status_line + "\r\n" + "\r\n".join(headers_gen) + "\r\n\r\n"
+    return line.encode("utf-8")
+
+
+_serialize_headers = _py_serialize_headers
+
+try:
+    import aiohttp._http_writer as _http_writer  # type: ignore[import-not-found]
+
+    _c_serialize_headers = _http_writer._serialize_headers
+    if not NO_EXTENSIONS:
+        _serialize_headers = _c_serialize_headers
+except ImportError:
+    pass

backend_service/venv/lib/python3.13/site-packages/aiohttp/log.py

@@ -0,0 +1,8 @@
+import logging
+
+access_logger = logging.getLogger("aiohttp.access")
+client_logger = logging.getLogger("aiohttp.client")
+internal_logger = logging.getLogger("aiohttp.internal")
+server_logger = logging.getLogger("aiohttp.server")
+web_logger = logging.getLogger("aiohttp.web")
+ws_logger = logging.getLogger("aiohttp.websocket")

backend_service/venv/lib/python3.13/site-packages/aiohttp/payload_streamer.py

@@ -0,0 +1,78 @@
+"""
+Payload implementation for coroutines as data provider.
+
+As a simple case, you can upload data from file::
+
+   @aiohttp.streamer
+   async def file_sender(writer, file_name=None):
+      with open(file_name, 'rb') as f:
+          chunk = f.read(2**16)
+          while chunk:
+              await writer.write(chunk)
+
+              chunk = f.read(2**16)
+
+Then you can use `file_sender` like this:
+
+    async with session.post('http://httpbin.org/post',
+                            data=file_sender(file_name='huge_file')) as resp:
+        print(await resp.text())
+
+..note:: Coroutine must accept `writer` as first argument
+
+"""
+
+import types
+import warnings
+from typing import Any, Awaitable, Callable, Dict, Tuple
+
+from .abc import AbstractStreamWriter
+from .payload import Payload, payload_type
+
+__all__ = ("streamer",)
+
+
+class _stream_wrapper:
+    def __init__(
+        self,
+        coro: Callable[..., Awaitable[None]],
+        args: Tuple[Any, ...],
+        kwargs: Dict[str, Any],
+    ) -> None:
+        self.coro = types.coroutine(coro)
+        self.args = args
+        self.kwargs = kwargs
+
+    async def __call__(self, writer: AbstractStreamWriter) -> None:
+        await self.coro(writer, *self.args, **self.kwargs)
+
+
+class streamer:
+    def __init__(self, coro: Callable[..., Awaitable[None]]) -> None:
+        warnings.warn(
+            "@streamer is deprecated, use async generators instead",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        self.coro = coro
+
+    def __call__(self, *args: Any, **kwargs: Any) -> _stream_wrapper:
+        return _stream_wrapper(self.coro, args, kwargs)
+
+
+@payload_type(_stream_wrapper)
+class StreamWrapperPayload(Payload):
+    async def write(self, writer: AbstractStreamWriter) -> None:
+        await self._value(writer)
+
+    def decode(self, encoding: str = "utf-8", errors: str = "strict") -> str:
+        raise TypeError("Unable to decode.")
+
+
+@payload_type(streamer)
+class StreamPayload(StreamWrapperPayload):
+    def __init__(self, value: Any, *args: Any, **kwargs: Any) -> None:
+        super().__init__(value(), *args, **kwargs)
+
+    async def write(self, writer: AbstractStreamWriter) -> None:
+        await self._value(writer)

backend_service/venv/lib/python3.13/site-packages/aiohttp/py.typed

@@ -0,0 +1 @@
+Marker

backend_service/venv/lib/python3.13/site-packages/aiohttp/pytest_plugin.py

@@ -0,0 +1,444 @@
+import asyncio
+import contextlib
+import inspect
+import warnings
+from typing import (
+    Any,
+    Awaitable,
+    Callable,
+    Dict,
+    Iterator,
+    Optional,
+    Protocol,
+    Union,
+    overload,
+)
+
+import pytest
+
+from .test_utils import (
+    BaseTestServer,
+    RawTestServer,
+    TestClient,
+    TestServer,
+    loop_context,
+    setup_test_loop,
+    teardown_test_loop,
+    unused_port as _unused_port,
+)
+from .web import Application, BaseRequest, Request
+from .web_protocol import _RequestHandler
+
+try:
+    import uvloop
+except ImportError:  # pragma: no cover
+    uvloop = None  # type: ignore[assignment]
+
+
+class AiohttpClient(Protocol):
+    @overload
+    async def __call__(
+        self,
+        __param: Application,
+        *,
+        server_kwargs: Optional[Dict[str, Any]] = None,
+        **kwargs: Any,
+    ) -> TestClient[Request, Application]: ...
+    @overload
+    async def __call__(
+        self,
+        __param: BaseTestServer,
+        *,
+        server_kwargs: Optional[Dict[str, Any]] = None,
+        **kwargs: Any,
+    ) -> TestClient[BaseRequest, None]: ...
+
+
+class AiohttpServer(Protocol):
+    def __call__(
+        self, app: Application, *, port: Optional[int] = None, **kwargs: Any
+    ) -> Awaitable[TestServer]: ...
+
+
+class AiohttpRawServer(Protocol):
+    def __call__(
+        self, handler: _RequestHandler, *, port: Optional[int] = None, **kwargs: Any
+    ) -> Awaitable[RawTestServer]: ...
+
+
+def pytest_addoption(parser):  # type: ignore[no-untyped-def]
+    parser.addoption(
+        "--aiohttp-fast",
+        action="store_true",
+        default=False,
+        help="run tests faster by disabling extra checks",
+    )
+    parser.addoption(
+        "--aiohttp-loop",
+        action="store",
+        default="pyloop",
+        help="run tests with specific loop: pyloop, uvloop or all",
+    )
+    parser.addoption(
+        "--aiohttp-enable-loop-debug",
+        action="store_true",
+        default=False,
+        help="enable event loop debug mode",
+    )
+
+
+def pytest_fixture_setup(fixturedef):  # type: ignore[no-untyped-def]
+    """Set up pytest fixture.
+
+    Allow fixtures to be coroutines. Run coroutine fixtures in an event loop.
+    """
+    func = fixturedef.func
+
+    if inspect.isasyncgenfunction(func):
+        # async generator fixture
+        is_async_gen = True
+    elif inspect.iscoroutinefunction(func):
+        # regular async fixture
+        is_async_gen = False
+    else:
+        # not an async fixture, nothing to do
+        return
+
+    strip_request = False
+    if "request" not in fixturedef.argnames:
+        fixturedef.argnames += ("request",)
+        strip_request = True
+
+    def wrapper(*args, **kwargs):  # type: ignore[no-untyped-def]
+        request = kwargs["request"]
+        if strip_request:
+            del kwargs["request"]
+
+        # if neither the fixture nor the test use the 'loop' fixture,
+        # 'getfixturevalue' will fail because the test is not parameterized
+        # (this can be removed someday if 'loop' is no longer parameterized)
+        if "loop" not in request.fixturenames:
+            raise Exception(
+                "Asynchronous fixtures must depend on the 'loop' fixture or "
+                "be used in tests depending from it."
+            )
+
+        _loop = request.getfixturevalue("loop")
+
+        if is_async_gen:
+            # for async generators, we need to advance the generator once,
+            # then advance it again in a finalizer
+            gen = func(*args, **kwargs)
+
+            def finalizer():  # type: ignore[no-untyped-def]
+                try:
+                    return _loop.run_until_complete(gen.__anext__())
+                except StopAsyncIteration:
+                    pass
+
+            request.addfinalizer(finalizer)
+            return _loop.run_until_complete(gen.__anext__())
+        else:
+            return _loop.run_until_complete(func(*args, **kwargs))
+
+    fixturedef.func = wrapper
+
+
+@pytest.fixture
+def fast(request):  # type: ignore[no-untyped-def]
+    """--fast config option"""
+    return request.config.getoption("--aiohttp-fast")
+
+
+@pytest.fixture
+def loop_debug(request):  # type: ignore[no-untyped-def]
+    """--enable-loop-debug config option"""
+    return request.config.getoption("--aiohttp-enable-loop-debug")
+
+
+@contextlib.contextmanager
+def _runtime_warning_context():  # type: ignore[no-untyped-def]
+    """Context manager which checks for RuntimeWarnings.
+
+    This exists specifically to
+    avoid "coroutine 'X' was never awaited" warnings being missed.
+
+    If RuntimeWarnings occur in the context a RuntimeError is raised.
+    """
+    with warnings.catch_warnings(record=True) as _warnings:
+        yield
+        rw = [
+            "{w.filename}:{w.lineno}:{w.message}".format(w=w)
+            for w in _warnings
+            if w.category == RuntimeWarning
+        ]
+        if rw:
+            raise RuntimeError(
+                "{} Runtime Warning{},\n{}".format(
+                    len(rw), "" if len(rw) == 1 else "s", "\n".join(rw)
+                )
+            )
+
+
+@contextlib.contextmanager
+def _passthrough_loop_context(loop, fast=False):  # type: ignore[no-untyped-def]
+    """Passthrough loop context.
+
+    Sets up and tears down a loop unless one is passed in via the loop
+    argument when it's passed straight through.
+    """
+    if loop:
+        # loop already exists, pass it straight through
+        yield loop
+    else:
+        # this shadows loop_context's standard behavior
+        loop = setup_test_loop()
+        yield loop
+        teardown_test_loop(loop, fast=fast)
+
+
+def pytest_pycollect_makeitem(collector, name, obj):  # type: ignore[no-untyped-def]
+    """Fix pytest collecting for coroutines."""
+    if collector.funcnamefilter(name) and inspect.iscoroutinefunction(obj):
+        return list(collector._genfunctions(name, obj))
+
+
+def pytest_pyfunc_call(pyfuncitem):  # type: ignore[no-untyped-def]
+    """Run coroutines in an event loop instead of a normal function call."""
+    fast = pyfuncitem.config.getoption("--aiohttp-fast")
+    if inspect.iscoroutinefunction(pyfuncitem.function):
+        existing_loop = (
+            pyfuncitem.funcargs.get("proactor_loop")
+            or pyfuncitem.funcargs.get("selector_loop")
+            or pyfuncitem.funcargs.get("uvloop_loop")
+            or pyfuncitem.funcargs.get("loop", None)
+        )
+
+        with _runtime_warning_context():
+            with _passthrough_loop_context(existing_loop, fast=fast) as _loop:
+                testargs = {
+                    arg: pyfuncitem.funcargs[arg]
+                    for arg in pyfuncitem._fixtureinfo.argnames
+                }
+                _loop.run_until_complete(pyfuncitem.obj(**testargs))
+
+        return True
+
+
+def pytest_generate_tests(metafunc):  # type: ignore[no-untyped-def]
+    if "loop_factory" not in metafunc.fixturenames:
+        return
+
+    loops = metafunc.config.option.aiohttp_loop
+    avail_factories: dict[str, Callable[[], asyncio.AbstractEventLoop]]
+    avail_factories = {"pyloop": asyncio.new_event_loop}
+
+    if uvloop is not None:  # pragma: no cover
+        avail_factories["uvloop"] = uvloop.new_event_loop
+
+    if loops == "all":
+        loops = "pyloop,uvloop?"
+
+    factories = {}  # type: ignore[var-annotated]
+    for name in loops.split(","):
+        required = not name.endswith("?")
+        name = name.strip(" ?")
+        if name not in avail_factories:  # pragma: no cover
+            if required:
+                raise ValueError(
+                    "Unknown loop '%s', available loops: %s"
+                    % (name, list(factories.keys()))
+                )
+            else:
+                continue
+        factories[name] = avail_factories[name]
+    metafunc.parametrize(
+        "loop_factory", list(factories.values()), ids=list(factories.keys())
+    )
+
+
+@pytest.fixture
+def loop(
+    loop_factory: Callable[[], asyncio.AbstractEventLoop],
+    fast: bool,
+    loop_debug: bool,
+) -> Iterator[asyncio.AbstractEventLoop]:
+    """Return an instance of the event loop."""
+    with loop_context(loop_factory, fast=fast) as _loop:
+        if loop_debug:
+            _loop.set_debug(True)  # pragma: no cover
+        asyncio.set_event_loop(_loop)
+        yield _loop
+
+
+@pytest.fixture
+def proactor_loop() -> Iterator[asyncio.AbstractEventLoop]:
+    factory = asyncio.ProactorEventLoop  # type: ignore[attr-defined]
+
+    with loop_context(factory) as _loop:
+        asyncio.set_event_loop(_loop)
+        yield _loop
+
+
+@pytest.fixture
+def unused_port(aiohttp_unused_port: Callable[[], int]) -> Callable[[], int]:
+    warnings.warn(
+        "Deprecated, use aiohttp_unused_port fixture instead",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return aiohttp_unused_port
+
+
+@pytest.fixture
+def aiohttp_unused_port() -> Callable[[], int]:
+    """Return a port that is unused on the current host."""
+    return _unused_port
+
+
+@pytest.fixture
+def aiohttp_server(loop: asyncio.AbstractEventLoop) -> Iterator[AiohttpServer]:
+    """Factory to create a TestServer instance, given an app.
+
+    aiohttp_server(app, **kwargs)
+    """
+    servers = []
+
+    async def go(
+        app: Application,
+        *,
+        host: str = "127.0.0.1",
+        port: Optional[int] = None,
+        **kwargs: Any,
+    ) -> TestServer:
+        server = TestServer(app, host=host, port=port)
+        await server.start_server(loop=loop, **kwargs)
+        servers.append(server)
+        return server
+
+    yield go
+
+    async def finalize() -> None:
+        while servers:
+            await servers.pop().close()
+
+    loop.run_until_complete(finalize())
+
+
+@pytest.fixture
+def test_server(aiohttp_server):  # type: ignore[no-untyped-def]  # pragma: no cover
+    warnings.warn(
+        "Deprecated, use aiohttp_server fixture instead",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return aiohttp_server
+
+
+@pytest.fixture
+def aiohttp_raw_server(loop: asyncio.AbstractEventLoop) -> Iterator[AiohttpRawServer]:
+    """Factory to create a RawTestServer instance, given a web handler.
+
+    aiohttp_raw_server(handler, **kwargs)
+    """
+    servers = []
+
+    async def go(
+        handler: _RequestHandler, *, port: Optional[int] = None, **kwargs: Any
+    ) -> RawTestServer:
+        server = RawTestServer(handler, port=port)
+        await server.start_server(loop=loop, **kwargs)
+        servers.append(server)
+        return server
+
+    yield go
+
+    async def finalize() -> None:
+        while servers:
+            await servers.pop().close()
+
+    loop.run_until_complete(finalize())
+
+
+@pytest.fixture
+def raw_test_server(  # type: ignore[no-untyped-def]  # pragma: no cover
+    aiohttp_raw_server,
+):
+    warnings.warn(
+        "Deprecated, use aiohttp_raw_server fixture instead",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return aiohttp_raw_server
+
+
+@pytest.fixture
+def aiohttp_client(loop: asyncio.AbstractEventLoop) -> Iterator[AiohttpClient]:
+    """Factory to create a TestClient instance.
+
+    aiohttp_client(app, **kwargs)
+    aiohttp_client(server, **kwargs)
+    aiohttp_client(raw_server, **kwargs)
+    """
+    clients = []
+
+    @overload
+    async def go(
+        __param: Application,
+        *,
+        server_kwargs: Optional[Dict[str, Any]] = None,
+        **kwargs: Any,
+    ) -> TestClient[Request, Application]: ...
+
+    @overload
+    async def go(
+        __param: BaseTestServer,
+        *,
+        server_kwargs: Optional[Dict[str, Any]] = None,
+        **kwargs: Any,
+    ) -> TestClient[BaseRequest, None]: ...
+
+    async def go(
+        __param: Union[Application, BaseTestServer],
+        *args: Any,
+        server_kwargs: Optional[Dict[str, Any]] = None,
+        **kwargs: Any,
+    ) -> TestClient[Any, Any]:
+        if isinstance(__param, Callable) and not isinstance(  # type: ignore[arg-type]
+            __param, (Application, BaseTestServer)
+        ):
+            __param = __param(loop, *args, **kwargs)
+            kwargs = {}
+        else:
+            assert not args, "args should be empty"
+
+        if isinstance(__param, Application):
+            server_kwargs = server_kwargs or {}
+            server = TestServer(__param, loop=loop, **server_kwargs)
+            client = TestClient(server, loop=loop, **kwargs)
+        elif isinstance(__param, BaseTestServer):
+            client = TestClient(__param, loop=loop, **kwargs)
+        else:
+            raise ValueError("Unknown argument type: %r" % type(__param))
+
+        await client.start_server()
+        clients.append(client)
+        return client
+
+    yield go
+
+    async def finalize() -> None:
+        while clients:
+            await clients.pop().close()
+
+    loop.run_until_complete(finalize())
+
+
+@pytest.fixture
+def test_client(aiohttp_client):  # type: ignore[no-untyped-def]  # pragma: no cover
+    warnings.warn(
+        "Deprecated, use aiohttp_client fixture instead",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return aiohttp_client

backend_service/venv/lib/python3.13/site-packages/aiohttp/resolver.py

@@ -0,0 +1,274 @@
+import asyncio
+import socket
+import weakref
+from typing import Any, Dict, Final, List, Optional, Tuple, Type, Union
+
+from .abc import AbstractResolver, ResolveResult
+
+__all__ = ("ThreadedResolver", "AsyncResolver", "DefaultResolver")
+
+
+try:
+    import aiodns
+
+    aiodns_default = hasattr(aiodns.DNSResolver, "getaddrinfo")
+except ImportError:  # pragma: no cover
+    aiodns = None  # type: ignore[assignment]
+    aiodns_default = False
+
+
+_NUMERIC_SOCKET_FLAGS = socket.AI_NUMERICHOST | socket.AI_NUMERICSERV
+_NAME_SOCKET_FLAGS = socket.NI_NUMERICHOST | socket.NI_NUMERICSERV
+_AI_ADDRCONFIG = socket.AI_ADDRCONFIG
+if hasattr(socket, "AI_MASK"):
+    _AI_ADDRCONFIG &= socket.AI_MASK
+
+
+class ThreadedResolver(AbstractResolver):
+    """Threaded resolver.
+
+    Uses an Executor for synchronous getaddrinfo() calls.
+    concurrent.futures.ThreadPoolExecutor is used by default.
+    """
+
+    def __init__(self, loop: Optional[asyncio.AbstractEventLoop] = None) -> None:
+        self._loop = loop or asyncio.get_running_loop()
+
+    async def resolve(
+        self, host: str, port: int = 0, family: socket.AddressFamily = socket.AF_INET
+    ) -> List[ResolveResult]:
+        infos = await self._loop.getaddrinfo(
+            host,
+            port,
+            type=socket.SOCK_STREAM,
+            family=family,
+            flags=_AI_ADDRCONFIG,
+        )
+
+        hosts: List[ResolveResult] = []
+        for family, _, proto, _, address in infos:
+            if family == socket.AF_INET6:
+                if len(address) < 3:
+                    # IPv6 is not supported by Python build,
+                    # or IPv6 is not enabled in the host
+                    continue
+                if address[3]:
+                    # This is essential for link-local IPv6 addresses.
+                    # LL IPv6 is a VERY rare case. Strictly speaking, we should use
+                    # getnameinfo() unconditionally, but performance makes sense.
+                    resolved_host, _port = await self._loop.getnameinfo(
+                        address, _NAME_SOCKET_FLAGS
+                    )
+                    port = int(_port)
+                else:
+                    resolved_host, port = address[:2]
+            else:  # IPv4
+                assert family == socket.AF_INET
+                resolved_host, port = address  # type: ignore[misc]
+            hosts.append(
+                ResolveResult(
+                    hostname=host,
+                    host=resolved_host,
+                    port=port,
+                    family=family,
+                    proto=proto,
+                    flags=_NUMERIC_SOCKET_FLAGS,
+                )
+            )
+
+        return hosts
+
+    async def close(self) -> None:
+        pass
+
+
+class AsyncResolver(AbstractResolver):
+    """Use the `aiodns` package to make asynchronous DNS lookups"""
+
+    def __init__(
+        self,
+        loop: Optional[asyncio.AbstractEventLoop] = None,
+        *args: Any,
+        **kwargs: Any,
+    ) -> None:
+        if aiodns is None:
+            raise RuntimeError("Resolver requires aiodns library")
+
+        self._loop = loop or asyncio.get_running_loop()
+        self._manager: Optional[_DNSResolverManager] = None
+        # If custom args are provided, create a dedicated resolver instance
+        # This means each AsyncResolver with custom args gets its own
+        # aiodns.DNSResolver instance
+        if args or kwargs:
+            self._resolver = aiodns.DNSResolver(*args, **kwargs)
+            return
+        # Use the shared resolver from the manager for default arguments
+        self._manager = _DNSResolverManager()
+        self._resolver = self._manager.get_resolver(self, self._loop)
+
+        if not hasattr(self._resolver, "gethostbyname"):
+            # aiodns 1.1 is not available, fallback to DNSResolver.query
+            self.resolve = self._resolve_with_query  # type: ignore
+
+    async def resolve(
+        self, host: str, port: int = 0, family: socket.AddressFamily = socket.AF_INET
+    ) -> List[ResolveResult]:
+        try:
+            resp = await self._resolver.getaddrinfo(
+                host,
+                port=port,
+                type=socket.SOCK_STREAM,
+                family=family,
+                flags=_AI_ADDRCONFIG,
+            )
+        except aiodns.error.DNSError as exc:
+            msg = exc.args[1] if len(exc.args) >= 1 else "DNS lookup failed"
+            raise OSError(None, msg) from exc
+        hosts: List[ResolveResult] = []
+        for node in resp.nodes:
+            address: Union[Tuple[bytes, int], Tuple[bytes, int, int, int]] = node.addr
+            family = node.family
+            if family == socket.AF_INET6:
+                if len(address) > 3 and address[3]:
+                    # This is essential for link-local IPv6 addresses.
+                    # LL IPv6 is a VERY rare case. Strictly speaking, we should use
+                    # getnameinfo() unconditionally, but performance makes sense.
+                    result = await self._resolver.getnameinfo(
+                        (address[0].decode("ascii"), *address[1:]),
+                        _NAME_SOCKET_FLAGS,
+                    )
+                    resolved_host = result.node
+                else:
+                    resolved_host = address[0].decode("ascii")
+                    port = address[1]
+            else:  # IPv4
+                assert family == socket.AF_INET
+                resolved_host = address[0].decode("ascii")
+                port = address[1]
+            hosts.append(
+                ResolveResult(
+                    hostname=host,
+                    host=resolved_host,
+                    port=port,
+                    family=family,
+                    proto=0,
+                    flags=_NUMERIC_SOCKET_FLAGS,
+                )
+            )
+
+        if not hosts:
+            raise OSError(None, "DNS lookup failed")
+
+        return hosts
+
+    async def _resolve_with_query(
+        self, host: str, port: int = 0, family: int = socket.AF_INET
+    ) -> List[Dict[str, Any]]:
+        qtype: Final = "AAAA" if family == socket.AF_INET6 else "A"
+
+        try:
+            resp = await self._resolver.query(host, qtype)
+        except aiodns.error.DNSError as exc:
+            msg = exc.args[1] if len(exc.args) >= 1 else "DNS lookup failed"
+            raise OSError(None, msg) from exc
+
+        hosts = []
+        for rr in resp:
+            hosts.append(
+                {
+                    "hostname": host,
+                    "host": rr.host,
+                    "port": port,
+                    "family": family,
+                    "proto": 0,
+                    "flags": socket.AI_NUMERICHOST,
+                }
+            )
+
+        if not hosts:
+            raise OSError(None, "DNS lookup failed")
+
+        return hosts
+
+    async def close(self) -> None:
+        if self._manager:
+            # Release the resolver from the manager if using the shared resolver
+            self._manager.release_resolver(self, self._loop)
+            self._manager = None  # Clear reference to manager
+            self._resolver = None  # type: ignore[assignment] # Clear reference to resolver
+            return
+        # Otherwise cancel our dedicated resolver
+        if self._resolver is not None:
+            self._resolver.cancel()
+        self._resolver = None  # type: ignore[assignment] # Clear reference
+
+
+class _DNSResolverManager:
+    """Manager for aiodns.DNSResolver objects.
+
+    This class manages shared aiodns.DNSResolver instances
+    with no custom arguments across different event loops.
+    """
+
+    _instance: Optional["_DNSResolverManager"] = None
+
+    def __new__(cls) -> "_DNSResolverManager":
+        if cls._instance is None:
+            cls._instance = super().__new__(cls)
+            cls._instance._init()
+        return cls._instance
+
+    def _init(self) -> None:
+        # Use WeakKeyDictionary to allow event loops to be garbage collected
+        self._loop_data: weakref.WeakKeyDictionary[
+            asyncio.AbstractEventLoop,
+            tuple["aiodns.DNSResolver", weakref.WeakSet["AsyncResolver"]],
+        ] = weakref.WeakKeyDictionary()
+
+    def get_resolver(
+        self, client: "AsyncResolver", loop: asyncio.AbstractEventLoop
+    ) -> "aiodns.DNSResolver":
+        """Get or create the shared aiodns.DNSResolver instance for a specific event loop.
+
+        Args:
+            client: The AsyncResolver instance requesting the resolver.
+                   This is required to track resolver usage.
+            loop: The event loop to use for the resolver.
+        """
+        # Create a new resolver and client set for this loop if it doesn't exist
+        if loop not in self._loop_data:
+            resolver = aiodns.DNSResolver(loop=loop)
+            client_set: weakref.WeakSet["AsyncResolver"] = weakref.WeakSet()
+            self._loop_data[loop] = (resolver, client_set)
+        else:
+            # Get the existing resolver and client set
+            resolver, client_set = self._loop_data[loop]
+
+        # Register this client with the loop
+        client_set.add(client)
+        return resolver
+
+    def release_resolver(
+        self, client: "AsyncResolver", loop: asyncio.AbstractEventLoop
+    ) -> None:
+        """Release the resolver for an AsyncResolver client when it's closed.
+
+        Args:
+            client: The AsyncResolver instance to release.
+            loop: The event loop the resolver was using.
+        """
+        # Remove client from its loop's tracking
+        current_loop_data = self._loop_data.get(loop)
+        if current_loop_data is None:
+            return
+        resolver, client_set = current_loop_data
+        client_set.discard(client)
+        # If no more clients for this loop, cancel and remove its resolver
+        if not client_set:
+            if resolver is not None:
+                resolver.cancel()
+            del self._loop_data[loop]
+
+
+_DefaultType = Type[Union[AsyncResolver, ThreadedResolver]]
+DefaultResolver: _DefaultType = AsyncResolver if aiodns_default else ThreadedResolver

backend_service/venv/lib/python3.13/site-packages/aiohttp/streams.py

@@ -0,0 +1,735 @@
+import asyncio
+import collections
+import warnings
+from typing import (
+    Awaitable,
+    Callable,
+    Deque,
+    Final,
+    Generic,
+    List,
+    Optional,
+    Tuple,
+    TypeVar,
+)
+
+from .base_protocol import BaseProtocol
+from .helpers import (
+    _EXC_SENTINEL,
+    BaseTimerContext,
+    TimerNoop,
+    set_exception,
+    set_result,
+)
+from .log import internal_logger
+
+__all__ = (
+    "EMPTY_PAYLOAD",
+    "EofStream",
+    "StreamReader",
+    "DataQueue",
+)
+
+_T = TypeVar("_T")
+
+
+class EofStream(Exception):
+    """eof stream indication."""
+
+
+class AsyncStreamIterator(Generic[_T]):
+
+    __slots__ = ("read_func",)
+
+    def __init__(self, read_func: Callable[[], Awaitable[_T]]) -> None:
+        self.read_func = read_func
+
+    def __aiter__(self) -> "AsyncStreamIterator[_T]":
+        return self
+
+    async def __anext__(self) -> _T:
+        try:
+            rv = await self.read_func()
+        except EofStream:
+            raise StopAsyncIteration
+        if rv == b"":
+            raise StopAsyncIteration
+        return rv
+
+
+class ChunkTupleAsyncStreamIterator:
+
+    __slots__ = ("_stream",)
+
+    def __init__(self, stream: "StreamReader") -> None:
+        self._stream = stream
+
+    def __aiter__(self) -> "ChunkTupleAsyncStreamIterator":
+        return self
+
+    async def __anext__(self) -> Tuple[bytes, bool]:
+        rv = await self._stream.readchunk()
+        if rv == (b"", False):
+            raise StopAsyncIteration
+        return rv
+
+
+class AsyncStreamReaderMixin:
+
+    __slots__ = ()
+
+    def __aiter__(self) -> AsyncStreamIterator[bytes]:
+        return AsyncStreamIterator(self.readline)  # type: ignore[attr-defined]
+
+    def iter_chunked(self, n: int) -> AsyncStreamIterator[bytes]:
+        """Returns an asynchronous iterator that yields chunks of size n."""
+        return AsyncStreamIterator(lambda: self.read(n))  # type: ignore[attr-defined]
+
+    def iter_any(self) -> AsyncStreamIterator[bytes]:
+        """Yield all available data as soon as it is received."""
+        return AsyncStreamIterator(self.readany)  # type: ignore[attr-defined]
+
+    def iter_chunks(self) -> ChunkTupleAsyncStreamIterator:
+        """Yield chunks of data as they are received by the server.
+
+        The yielded objects are tuples
+        of (bytes, bool) as returned by the StreamReader.readchunk method.
+        """
+        return ChunkTupleAsyncStreamIterator(self)  # type: ignore[arg-type]
+
+
+class StreamReader(AsyncStreamReaderMixin):
+    """An enhancement of asyncio.StreamReader.
+
+    Supports asynchronous iteration by line, chunk or as available::
+
+        async for line in reader:
+            ...
+        async for chunk in reader.iter_chunked(1024):
+            ...
+        async for slice in reader.iter_any():
+            ...
+
+    """
+
+    __slots__ = (
+        "_protocol",
+        "_low_water",
+        "_high_water",
+        "_loop",
+        "_size",
+        "_cursor",
+        "_http_chunk_splits",
+        "_buffer",
+        "_buffer_offset",
+        "_eof",
+        "_waiter",
+        "_eof_waiter",
+        "_exception",
+        "_timer",
+        "_eof_callbacks",
+        "_eof_counter",
+        "total_bytes",
+        "total_compressed_bytes",
+    )
+
+    def __init__(
+        self,
+        protocol: BaseProtocol,
+        limit: int,
+        *,
+        timer: Optional[BaseTimerContext] = None,
+        loop: Optional[asyncio.AbstractEventLoop] = None,
+    ) -> None:
+        self._protocol = protocol
+        self._low_water = limit
+        self._high_water = limit * 2
+        if loop is None:
+            loop = asyncio.get_event_loop()
+        self._loop = loop
+        self._size = 0
+        self._cursor = 0
+        self._http_chunk_splits: Optional[List[int]] = None
+        self._buffer: Deque[bytes] = collections.deque()
+        self._buffer_offset = 0
+        self._eof = False
+        self._waiter: Optional[asyncio.Future[None]] = None
+        self._eof_waiter: Optional[asyncio.Future[None]] = None
+        self._exception: Optional[BaseException] = None
+        self._timer = TimerNoop() if timer is None else timer
+        self._eof_callbacks: List[Callable[[], None]] = []
+        self._eof_counter = 0
+        self.total_bytes = 0
+        self.total_compressed_bytes: Optional[int] = None
+
+    def __repr__(self) -> str:
+        info = [self.__class__.__name__]
+        if self._size:
+            info.append("%d bytes" % self._size)
+        if self._eof:
+            info.append("eof")
+        if self._low_water != 2**16:  # default limit
+            info.append("low=%d high=%d" % (self._low_water, self._high_water))
+        if self._waiter:
+            info.append("w=%r" % self._waiter)
+        if self._exception:
+            info.append("e=%r" % self._exception)
+        return "<%s>" % " ".join(info)
+
+    def get_read_buffer_limits(self) -> Tuple[int, int]:
+        return (self._low_water, self._high_water)
+
+    def exception(self) -> Optional[BaseException]:
+        return self._exception
+
+    def set_exception(
+        self,
+        exc: BaseException,
+        exc_cause: BaseException = _EXC_SENTINEL,
+    ) -> None:
+        self._exception = exc
+        self._eof_callbacks.clear()
+
+        waiter = self._waiter
+        if waiter is not None:
+            self._waiter = None
+            set_exception(waiter, exc, exc_cause)
+
+        waiter = self._eof_waiter
+        if waiter is not None:
+            self._eof_waiter = None
+            set_exception(waiter, exc, exc_cause)
+
+    def on_eof(self, callback: Callable[[], None]) -> None:
+        if self._eof:
+            try:
+                callback()
+            except Exception:
+                internal_logger.exception("Exception in eof callback")
+        else:
+            self._eof_callbacks.append(callback)
+
+    def feed_eof(self) -> None:
+        self._eof = True
+
+        waiter = self._waiter
+        if waiter is not None:
+            self._waiter = None
+            set_result(waiter, None)
+
+        waiter = self._eof_waiter
+        if waiter is not None:
+            self._eof_waiter = None
+            set_result(waiter, None)
+
+        if self._protocol._reading_paused:
+            self._protocol.resume_reading()
+
+        for cb in self._eof_callbacks:
+            try:
+                cb()
+            except Exception:
+                internal_logger.exception("Exception in eof callback")
+
+        self._eof_callbacks.clear()
+
+    def is_eof(self) -> bool:
+        """Return True if  'feed_eof' was called."""
+        return self._eof
+
+    def at_eof(self) -> bool:
+        """Return True if the buffer is empty and 'feed_eof' was called."""
+        return self._eof and not self._buffer
+
+    async def wait_eof(self) -> None:
+        if self._eof:
+            return
+
+        assert self._eof_waiter is None
+        self._eof_waiter = self._loop.create_future()
+        try:
+            await self._eof_waiter
+        finally:
+            self._eof_waiter = None
+
+    @property
+    def total_raw_bytes(self) -> int:
+        if self.total_compressed_bytes is None:
+            return self.total_bytes
+        return self.total_compressed_bytes
+
+    def unread_data(self, data: bytes) -> None:
+        """rollback reading some data from stream, inserting it to buffer head."""
+        warnings.warn(
+            "unread_data() is deprecated "
+            "and will be removed in future releases (#3260)",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        if not data:
+            return
+
+        if self._buffer_offset:
+            self._buffer[0] = self._buffer[0][self._buffer_offset :]
+            self._buffer_offset = 0
+        self._size += len(data)
+        self._cursor -= len(data)
+        self._buffer.appendleft(data)
+        self._eof_counter = 0
+
+    # TODO: size is ignored, remove the param later
+    def feed_data(self, data: bytes, size: int = 0) -> None:
+        assert not self._eof, "feed_data after feed_eof"
+
+        if not data:
+            return
+
+        data_len = len(data)
+        self._size += data_len
+        self._buffer.append(data)
+        self.total_bytes += data_len
+
+        waiter = self._waiter
+        if waiter is not None:
+            self._waiter = None
+            set_result(waiter, None)
+
+        if self._size > self._high_water and not self._protocol._reading_paused:
+            self._protocol.pause_reading()
+
+    def begin_http_chunk_receiving(self) -> None:
+        if self._http_chunk_splits is None:
+            if self.total_bytes:
+                raise RuntimeError(
+                    "Called begin_http_chunk_receiving when some data was already fed"
+                )
+            self._http_chunk_splits = []
+
+    def end_http_chunk_receiving(self) -> None:
+        if self._http_chunk_splits is None:
+            raise RuntimeError(
+                "Called end_chunk_receiving without calling "
+                "begin_chunk_receiving first"
+            )
+
+        # self._http_chunk_splits contains logical byte offsets from start of
+        # the body transfer. Each offset is the offset of the end of a chunk.
+        # "Logical" means bytes, accessible for a user.
+        # If no chunks containing logical data were received, current position
+        # is difinitely zero.
+        pos = self._http_chunk_splits[-1] if self._http_chunk_splits else 0
+
+        if self.total_bytes == pos:
+            # We should not add empty chunks here. So we check for that.
+            # Note, when chunked + gzip is used, we can receive a chunk
+            # of compressed data, but that data may not be enough for gzip FSM
+            # to yield any uncompressed data. That's why current position may
+            # not change after receiving a chunk.
+            return
+
+        self._http_chunk_splits.append(self.total_bytes)
+
+        # wake up readchunk when end of http chunk received
+        waiter = self._waiter
+        if waiter is not None:
+            self._waiter = None
+            set_result(waiter, None)
+
+    async def _wait(self, func_name: str) -> None:
+        if not self._protocol.connected:
+            raise RuntimeError("Connection closed.")
+
+        # StreamReader uses a future to link the protocol feed_data() method
+        # to a read coroutine. Running two read coroutines at the same time
+        # would have an unexpected behaviour. It would not possible to know
+        # which coroutine would get the next data.
+        if self._waiter is not None:
+            raise RuntimeError(
+                "%s() called while another coroutine is "
+                "already waiting for incoming data" % func_name
+            )
+
+        waiter = self._waiter = self._loop.create_future()
+        try:
+            with self._timer:
+                await waiter
+        finally:
+            self._waiter = None
+
+    async def readline(self) -> bytes:
+        return await self.readuntil()
+
+    async def readuntil(self, separator: bytes = b"\n") -> bytes:
+        seplen = len(separator)
+        if seplen == 0:
+            raise ValueError("Separator should be at least one-byte string")
+
+        if self._exception is not None:
+            raise self._exception
+
+        chunk = b""
+        chunk_size = 0
+        not_enough = True
+
+        while not_enough:
+            while self._buffer and not_enough:
+                offset = self._buffer_offset
+                ichar = self._buffer[0].find(separator, offset) + 1
+                # Read from current offset to found separator or to the end.
+                data = self._read_nowait_chunk(
+                    ichar - offset + seplen - 1 if ichar else -1
+                )
+                chunk += data
+                chunk_size += len(data)
+                if ichar:
+                    not_enough = False
+
+                if chunk_size > self._high_water:
+                    raise ValueError("Chunk too big")
+
+            if self._eof:
+                break
+
+            if not_enough:
+                await self._wait("readuntil")
+
+        return chunk
+
+    async def read(self, n: int = -1) -> bytes:
+        if self._exception is not None:
+            raise self._exception
+
+        # migration problem; with DataQueue you have to catch
+        # EofStream exception, so common way is to run payload.read() inside
+        # infinite loop. what can cause real infinite loop with StreamReader
+        # lets keep this code one major release.
+        if __debug__:
+            if self._eof and not self._buffer:
+                self._eof_counter = getattr(self, "_eof_counter", 0) + 1
+                if self._eof_counter > 5:
+                    internal_logger.warning(
+                        "Multiple access to StreamReader in eof state, "
+                        "might be infinite loop.",
+                        stack_info=True,
+                    )
+
+        if not n:
+            return b""
+
+        if n < 0:
+            # This used to just loop creating a new waiter hoping to
+            # collect everything in self._buffer, but that would
+            # deadlock if the subprocess sends more than self.limit
+            # bytes.  So just call self.readany() until EOF.
+            blocks = []
+            while True:
+                block = await self.readany()
+                if not block:
+                    break
+                blocks.append(block)
+            return b"".join(blocks)
+
+        # TODO: should be `if` instead of `while`
+        # because waiter maybe triggered on chunk end,
+        # without feeding any data
+        while not self._buffer and not self._eof:
+            await self._wait("read")
+
+        return self._read_nowait(n)
+
+    async def readany(self) -> bytes:
+        if self._exception is not None:
+            raise self._exception
+
+        # TODO: should be `if` instead of `while`
+        # because waiter maybe triggered on chunk end,
+        # without feeding any data
+        while not self._buffer and not self._eof:
+            await self._wait("readany")
+
+        return self._read_nowait(-1)
+
+    async def readchunk(self) -> Tuple[bytes, bool]:
+        """Returns a tuple of (data, end_of_http_chunk).
+
+        When chunked transfer
+        encoding is used, end_of_http_chunk is a boolean indicating if the end
+        of the data corresponds to the end of a HTTP chunk , otherwise it is
+        always False.
+        """
+        while True:
+            if self._exception is not None:
+                raise self._exception
+
+            while self._http_chunk_splits:
+                pos = self._http_chunk_splits.pop(0)
+                if pos == self._cursor:
+                    return (b"", True)
+                if pos > self._cursor:
+                    return (self._read_nowait(pos - self._cursor), True)
+                internal_logger.warning(
+                    "Skipping HTTP chunk end due to data "
+                    "consumption beyond chunk boundary"
+                )
+
+            if self._buffer:
+                return (self._read_nowait_chunk(-1), False)
+                # return (self._read_nowait(-1), False)
+
+            if self._eof:
+                # Special case for signifying EOF.
+                # (b'', True) is not a final return value actually.
+                return (b"", False)
+
+            await self._wait("readchunk")
+
+    async def readexactly(self, n: int) -> bytes:
+        if self._exception is not None:
+            raise self._exception
+
+        blocks: List[bytes] = []
+        while n > 0:
+            block = await self.read(n)
+            if not block:
+                partial = b"".join(blocks)
+                raise asyncio.IncompleteReadError(partial, len(partial) + n)
+            blocks.append(block)
+            n -= len(block)
+
+        return b"".join(blocks)
+
+    def read_nowait(self, n: int = -1) -> bytes:
+        # default was changed to be consistent with .read(-1)
+        #
+        # I believe the most users don't know about the method and
+        # they are not affected.
+        if self._exception is not None:
+            raise self._exception
+
+        if self._waiter and not self._waiter.done():
+            raise RuntimeError(
+                "Called while some coroutine is waiting for incoming data."
+            )
+
+        return self._read_nowait(n)
+
+    def _read_nowait_chunk(self, n: int) -> bytes:
+        first_buffer = self._buffer[0]
+        offset = self._buffer_offset
+        if n != -1 and len(first_buffer) - offset > n:
+            data = first_buffer[offset : offset + n]
+            self._buffer_offset += n
+
+        elif offset:
+            self._buffer.popleft()
+            data = first_buffer[offset:]
+            self._buffer_offset = 0
+
+        else:
+            data = self._buffer.popleft()
+
+        data_len = len(data)
+        self._size -= data_len
+        self._cursor += data_len
+
+        chunk_splits = self._http_chunk_splits
+        # Prevent memory leak: drop useless chunk splits
+        while chunk_splits and chunk_splits[0] < self._cursor:
+            chunk_splits.pop(0)
+
+        if self._size < self._low_water and self._protocol._reading_paused:
+            self._protocol.resume_reading()
+        return data
+
+    def _read_nowait(self, n: int) -> bytes:
+        """Read not more than n bytes, or whole buffer if n == -1"""
+        self._timer.assert_timeout()
+
+        chunks = []
+        while self._buffer:
+            chunk = self._read_nowait_chunk(n)
+            chunks.append(chunk)
+            if n != -1:
+                n -= len(chunk)
+                if n == 0:
+                    break
+
+        return b"".join(chunks) if chunks else b""
+
+
+class EmptyStreamReader(StreamReader):  # lgtm [py/missing-call-to-init]
+
+    __slots__ = ("_read_eof_chunk",)
+
+    def __init__(self) -> None:
+        self._read_eof_chunk = False
+        self.total_bytes = 0
+
+    def __repr__(self) -> str:
+        return "<%s>" % self.__class__.__name__
+
+    def exception(self) -> Optional[BaseException]:
+        return None
+
+    def set_exception(
+        self,
+        exc: BaseException,
+        exc_cause: BaseException = _EXC_SENTINEL,
+    ) -> None:
+        pass
+
+    def on_eof(self, callback: Callable[[], None]) -> None:
+        try:
+            callback()
+        except Exception:
+            internal_logger.exception("Exception in eof callback")
+
+    def feed_eof(self) -> None:
+        pass
+
+    def is_eof(self) -> bool:
+        return True
+
+    def at_eof(self) -> bool:
+        return True
+
+    async def wait_eof(self) -> None:
+        return
+
+    def feed_data(self, data: bytes, n: int = 0) -> None:
+        pass
+
+    async def readline(self) -> bytes:
+        return b""
+
+    async def read(self, n: int = -1) -> bytes:
+        return b""
+
+    # TODO add async def readuntil
+
+    async def readany(self) -> bytes:
+        return b""
+
+    async def readchunk(self) -> Tuple[bytes, bool]:
+        if not self._read_eof_chunk:
+            self._read_eof_chunk = True
+            return (b"", False)
+
+        return (b"", True)
+
+    async def readexactly(self, n: int) -> bytes:
+        raise asyncio.IncompleteReadError(b"", n)
+
+    def read_nowait(self, n: int = -1) -> bytes:
+        return b""
+
+
+EMPTY_PAYLOAD: Final[StreamReader] = EmptyStreamReader()
+
+
+class DataQueue(Generic[_T]):
+    """DataQueue is a general-purpose blocking queue with one reader."""
+
+    def __init__(self, loop: asyncio.AbstractEventLoop) -> None:
+        self._loop = loop
+        self._eof = False
+        self._waiter: Optional[asyncio.Future[None]] = None
+        self._exception: Optional[BaseException] = None
+        self._buffer: Deque[Tuple[_T, int]] = collections.deque()
+
+    def __len__(self) -> int:
+        return len(self._buffer)
+
+    def is_eof(self) -> bool:
+        return self._eof
+
+    def at_eof(self) -> bool:
+        return self._eof and not self._buffer
+
+    def exception(self) -> Optional[BaseException]:
+        return self._exception
+
+    def set_exception(
+        self,
+        exc: BaseException,
+        exc_cause: BaseException = _EXC_SENTINEL,
+    ) -> None:
+        self._eof = True
+        self._exception = exc
+        if (waiter := self._waiter) is not None:
+            self._waiter = None
+            set_exception(waiter, exc, exc_cause)
+
+    def feed_data(self, data: _T, size: int = 0) -> None:
+        self._buffer.append((data, size))
+        if (waiter := self._waiter) is not None:
+            self._waiter = None
+            set_result(waiter, None)
+
+    def feed_eof(self) -> None:
+        self._eof = True
+        if (waiter := self._waiter) is not None:
+            self._waiter = None
+            set_result(waiter, None)
+
+    async def read(self) -> _T:
+        if not self._buffer and not self._eof:
+            assert not self._waiter
+            self._waiter = self._loop.create_future()
+            try:
+                await self._waiter
+            except (asyncio.CancelledError, asyncio.TimeoutError):
+                self._waiter = None
+                raise
+        if self._buffer:
+            data, _ = self._buffer.popleft()
+            return data
+        if self._exception is not None:
+            raise self._exception
+        raise EofStream
+
+    def __aiter__(self) -> AsyncStreamIterator[_T]:
+        return AsyncStreamIterator(self.read)
+
+
+class FlowControlDataQueue(DataQueue[_T]):
+    """FlowControlDataQueue resumes and pauses an underlying stream.
+
+    It is a destination for parsed data.
+
+    This class is deprecated and will be removed in version 4.0.
+    """
+
+    def __init__(
+        self, protocol: BaseProtocol, limit: int, *, loop: asyncio.AbstractEventLoop
+    ) -> None:
+        super().__init__(loop=loop)
+        self._size = 0
+        self._protocol = protocol
+        self._limit = limit * 2
+
+    def feed_data(self, data: _T, size: int = 0) -> None:
+        super().feed_data(data, size)
+        self._size += size
+
+        if self._size > self._limit and not self._protocol._reading_paused:
+            self._protocol.pause_reading()
+
+    async def read(self) -> _T:
+        if not self._buffer and not self._eof:
+            assert not self._waiter
+            self._waiter = self._loop.create_future()
+            try:
+                await self._waiter
+            except (asyncio.CancelledError, asyncio.TimeoutError):
+                self._waiter = None
+                raise
+        if self._buffer:
+            data, size = self._buffer.popleft()
+            self._size -= size
+            if self._size < self._limit and self._protocol._reading_paused:
+                self._protocol.resume_reading()
+            return data
+        if self._exception is not None:
+            raise self._exception
+        raise EofStream

backend_service/venv/lib/python3.13/site-packages/aiohttp/tcp_helpers.py

@@ -0,0 +1,37 @@
+"""Helper methods to tune a TCP connection"""
+
+import asyncio
+import socket
+from contextlib import suppress
+from typing import Optional  # noqa
+
+__all__ = ("tcp_keepalive", "tcp_nodelay")
+
+
+if hasattr(socket, "SO_KEEPALIVE"):
+
+    def tcp_keepalive(transport: asyncio.Transport) -> None:
+        sock = transport.get_extra_info("socket")
+        if sock is not None:
+            sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
+
+else:
+
+    def tcp_keepalive(transport: asyncio.Transport) -> None:  # pragma: no cover
+        pass
+
+
+def tcp_nodelay(transport: asyncio.Transport, value: bool) -> None:
+    sock = transport.get_extra_info("socket")
+
+    if sock is None:
+        return
+
+    if sock.family not in (socket.AF_INET, socket.AF_INET6):
+        return
+
+    value = bool(value)
+
+    # socket may be closed already, on windows OSError get raised
+    with suppress(OSError):
+        sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, value)

backend_service/venv/lib/python3.13/site-packages/aiohttp/test_utils.py

@@ -0,0 +1,774 @@
+"""Utilities shared by tests."""
+
+import asyncio
+import contextlib
+import gc
+import inspect
+import ipaddress
+import os
+import socket
+import sys
+import warnings
+from abc import ABC, abstractmethod
+from types import TracebackType
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Generic,
+    Iterator,
+    List,
+    Optional,
+    Type,
+    TypeVar,
+    cast,
+    overload,
+)
+from unittest import IsolatedAsyncioTestCase, mock
+
+from aiosignal import Signal
+from multidict import CIMultiDict, CIMultiDictProxy
+from yarl import URL
+
+import aiohttp
+from aiohttp.client import (
+    _RequestContextManager,
+    _RequestOptions,
+    _WSRequestContextManager,
+)
+
+from . import ClientSession, hdrs
+from .abc import AbstractCookieJar
+from .client_reqrep import ClientResponse
+from .client_ws import ClientWebSocketResponse
+from .helpers import sentinel
+from .http import HttpVersion, RawRequestMessage
+from .streams import EMPTY_PAYLOAD, StreamReader
+from .typedefs import StrOrURL
+from .web import (
+    Application,
+    AppRunner,
+    BaseRequest,
+    BaseRunner,
+    Request,
+    Server,
+    ServerRunner,
+    SockSite,
+    UrlMappingMatchInfo,
+)
+from .web_protocol import _RequestHandler
+
+if TYPE_CHECKING:
+    from ssl import SSLContext
+else:
+    SSLContext = None
+
+if sys.version_info >= (3, 11) and TYPE_CHECKING:
+    from typing import Unpack
+
+if sys.version_info >= (3, 11):
+    from typing import Self
+else:
+    Self = Any
+
+_ApplicationNone = TypeVar("_ApplicationNone", Application, None)
+_Request = TypeVar("_Request", bound=BaseRequest)
+
+REUSE_ADDRESS = os.name == "posix" and sys.platform != "cygwin"
+
+
+def get_unused_port_socket(
+    host: str, family: socket.AddressFamily = socket.AF_INET
+) -> socket.socket:
+    return get_port_socket(host, 0, family)
+
+
+def get_port_socket(
+    host: str, port: int, family: socket.AddressFamily
+) -> socket.socket:
+    s = socket.socket(family, socket.SOCK_STREAM)
+    if REUSE_ADDRESS:
+        # Windows has different semantics for SO_REUSEADDR,
+        # so don't set it. Ref:
+        # https://docs.microsoft.com/en-us/windows/win32/winsock/using-so-reuseaddr-and-so-exclusiveaddruse
+        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    s.bind((host, port))
+    return s
+
+
+def unused_port() -> int:
+    """Return a port that is unused on the current host."""
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+        s.bind(("127.0.0.1", 0))
+        return cast(int, s.getsockname()[1])
+
+
+class BaseTestServer(ABC):
+    __test__ = False
+
+    def __init__(
+        self,
+        *,
+        scheme: str = "",
+        loop: Optional[asyncio.AbstractEventLoop] = None,
+        host: str = "127.0.0.1",
+        port: Optional[int] = None,
+        skip_url_asserts: bool = False,
+        socket_factory: Callable[
+            [str, int, socket.AddressFamily], socket.socket
+        ] = get_port_socket,
+        **kwargs: Any,
+    ) -> None:
+        self._loop = loop
+        self.runner: Optional[BaseRunner] = None
+        self._root: Optional[URL] = None
+        self.host = host
+        self.port = port
+        self._closed = False
+        self.scheme = scheme
+        self.skip_url_asserts = skip_url_asserts
+        self.socket_factory = socket_factory
+
+    async def start_server(
+        self, loop: Optional[asyncio.AbstractEventLoop] = None, **kwargs: Any
+    ) -> None:
+        if self.runner:
+            return
+        self._loop = loop
+        self._ssl = kwargs.pop("ssl", None)
+        self.runner = await self._make_runner(handler_cancellation=True, **kwargs)
+        await self.runner.setup()
+        if not self.port:
+            self.port = 0
+        absolute_host = self.host
+        try:
+            version = ipaddress.ip_address(self.host).version
+        except ValueError:
+            version = 4
+        if version == 6:
+            absolute_host = f"[{self.host}]"
+        family = socket.AF_INET6 if version == 6 else socket.AF_INET
+        _sock = self.socket_factory(self.host, self.port, family)
+        self.host, self.port = _sock.getsockname()[:2]
+        site = SockSite(self.runner, sock=_sock, ssl_context=self._ssl)
+        await site.start()
+        server = site._server
+        assert server is not None
+        sockets = server.sockets  # type: ignore[attr-defined]
+        assert sockets is not None
+        self.port = sockets[0].getsockname()[1]
+        if not self.scheme:
+            self.scheme = "https" if self._ssl else "http"
+        self._root = URL(f"{self.scheme}://{absolute_host}:{self.port}")
+
+    @abstractmethod  # pragma: no cover
+    async def _make_runner(self, **kwargs: Any) -> BaseRunner:
+        pass
+
+    def make_url(self, path: StrOrURL) -> URL:
+        assert self._root is not None
+        url = URL(path)
+        if not self.skip_url_asserts:
+            assert not url.absolute
+            return self._root.join(url)
+        else:
+            return URL(str(self._root) + str(path))
+
+    @property
+    def started(self) -> bool:
+        return self.runner is not None
+
+    @property
+    def closed(self) -> bool:
+        return self._closed
+
+    @property
+    def handler(self) -> Server:
+        # for backward compatibility
+        # web.Server instance
+        runner = self.runner
+        assert runner is not None
+        assert runner.server is not None
+        return runner.server
+
+    async def close(self) -> None:
+        """Close all fixtures created by the test client.
+
+        After that point, the TestClient is no longer usable.
+
+        This is an idempotent function: running close multiple times
+        will not have any additional effects.
+
+        close is also run when the object is garbage collected, and on
+        exit when used as a context manager.
+
+        """
+        if self.started and not self.closed:
+            assert self.runner is not None
+            await self.runner.cleanup()
+            self._root = None
+            self.port = None
+            self._closed = True
+
+    def __enter__(self) -> None:
+        raise TypeError("Use async with instead")
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_value: Optional[BaseException],
+        traceback: Optional[TracebackType],
+    ) -> None:
+        # __exit__ should exist in pair with __enter__ but never executed
+        pass  # pragma: no cover
+
+    async def __aenter__(self) -> "BaseTestServer":
+        await self.start_server(loop=self._loop)
+        return self
+
+    async def __aexit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_value: Optional[BaseException],
+        traceback: Optional[TracebackType],
+    ) -> None:
+        await self.close()
+
+
+class TestServer(BaseTestServer):
+    def __init__(
+        self,
+        app: Application,
+        *,
+        scheme: str = "",
+        host: str = "127.0.0.1",
+        port: Optional[int] = None,
+        **kwargs: Any,
+    ):
+        self.app = app
+        super().__init__(scheme=scheme, host=host, port=port, **kwargs)
+
+    async def _make_runner(self, **kwargs: Any) -> BaseRunner:
+        return AppRunner(self.app, **kwargs)
+
+
+class RawTestServer(BaseTestServer):
+    def __init__(
+        self,
+        handler: _RequestHandler,
+        *,
+        scheme: str = "",
+        host: str = "127.0.0.1",
+        port: Optional[int] = None,
+        **kwargs: Any,
+    ) -> None:
+        self._handler = handler
+        super().__init__(scheme=scheme, host=host, port=port, **kwargs)
+
+    async def _make_runner(self, debug: bool = True, **kwargs: Any) -> ServerRunner:
+        srv = Server(self._handler, loop=self._loop, debug=debug, **kwargs)
+        return ServerRunner(srv, debug=debug, **kwargs)
+
+
+class TestClient(Generic[_Request, _ApplicationNone]):
+    """
+    A test client implementation.
+
+    To write functional tests for aiohttp based servers.
+
+    """
+
+    __test__ = False
+
+    @overload
+    def __init__(
+        self: "TestClient[Request, Application]",
+        server: TestServer,
+        *,
+        cookie_jar: Optional[AbstractCookieJar] = None,
+        **kwargs: Any,
+    ) -> None: ...
+    @overload
+    def __init__(
+        self: "TestClient[_Request, None]",
+        server: BaseTestServer,
+        *,
+        cookie_jar: Optional[AbstractCookieJar] = None,
+        **kwargs: Any,
+    ) -> None: ...
+    def __init__(
+        self,
+        server: BaseTestServer,
+        *,
+        cookie_jar: Optional[AbstractCookieJar] = None,
+        loop: Optional[asyncio.AbstractEventLoop] = None,
+        **kwargs: Any,
+    ) -> None:
+        if not isinstance(server, BaseTestServer):
+            raise TypeError(
+                "server must be TestServer instance, found type: %r" % type(server)
+            )
+        self._server = server
+        self._loop = loop
+        if cookie_jar is None:
+            cookie_jar = aiohttp.CookieJar(unsafe=True, loop=loop)
+        self._session = ClientSession(loop=loop, cookie_jar=cookie_jar, **kwargs)
+        self._session._retry_connection = False
+        self._closed = False
+        self._responses: List[ClientResponse] = []
+        self._websockets: List[ClientWebSocketResponse] = []
+
+    async def start_server(self) -> None:
+        await self._server.start_server(loop=self._loop)
+
+    @property
+    def host(self) -> str:
+        return self._server.host
+
+    @property
+    def port(self) -> Optional[int]:
+        return self._server.port
+
+    @property
+    def server(self) -> BaseTestServer:
+        return self._server
+
+    @property
+    def app(self) -> _ApplicationNone:
+        return getattr(self._server, "app", None)  # type: ignore[return-value]
+
+    @property
+    def session(self) -> ClientSession:
+        """An internal aiohttp.ClientSession.
+
+        Unlike the methods on the TestClient, client session requests
+        do not automatically include the host in the url queried, and
+        will require an absolute path to the resource.
+
+        """
+        return self._session
+
+    def make_url(self, path: StrOrURL) -> URL:
+        return self._server.make_url(path)
+
+    async def _request(
+        self, method: str, path: StrOrURL, **kwargs: Any
+    ) -> ClientResponse:
+        resp = await self._session.request(method, self.make_url(path), **kwargs)
+        # save it to close later
+        self._responses.append(resp)
+        return resp
+
+    if sys.version_info >= (3, 11) and TYPE_CHECKING:
+
+        def request(
+            self, method: str, path: StrOrURL, **kwargs: Unpack[_RequestOptions]
+        ) -> _RequestContextManager: ...
+
+        def get(
+            self,
+            path: StrOrURL,
+            **kwargs: Unpack[_RequestOptions],
+        ) -> _RequestContextManager: ...
+
+        def options(
+            self,
+            path: StrOrURL,
+            **kwargs: Unpack[_RequestOptions],
+        ) -> _RequestContextManager: ...
+
+        def head(
+            self,
+            path: StrOrURL,
+            **kwargs: Unpack[_RequestOptions],
+        ) -> _RequestContextManager: ...
+
+        def post(
+            self,
+            path: StrOrURL,
+            **kwargs: Unpack[_RequestOptions],
+        ) -> _RequestContextManager: ...
+
+        def put(
+            self,
+            path: StrOrURL,
+            **kwargs: Unpack[_RequestOptions],
+        ) -> _RequestContextManager: ...
+
+        def patch(
+            self,
+            path: StrOrURL,
+            **kwargs: Unpack[_RequestOptions],
+        ) -> _RequestContextManager: ...
+
+        def delete(
+            self,
+            path: StrOrURL,
+            **kwargs: Unpack[_RequestOptions],
+        ) -> _RequestContextManager: ...
+
+    else:
+
+        def request(
+            self, method: str, path: StrOrURL, **kwargs: Any
+        ) -> _RequestContextManager:
+            """Routes a request to tested http server.
+
+            The interface is identical to aiohttp.ClientSession.request,
+            except the loop kwarg is overridden by the instance used by the
+            test server.
+
+            """
+            return _RequestContextManager(self._request(method, path, **kwargs))
+
+        def get(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager:
+            """Perform an HTTP GET request."""
+            return _RequestContextManager(self._request(hdrs.METH_GET, path, **kwargs))
+
+        def post(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager:
+            """Perform an HTTP POST request."""
+            return _RequestContextManager(self._request(hdrs.METH_POST, path, **kwargs))
+
+        def options(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager:
+            """Perform an HTTP OPTIONS request."""
+            return _RequestContextManager(
+                self._request(hdrs.METH_OPTIONS, path, **kwargs)
+            )
+
+        def head(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager:
+            """Perform an HTTP HEAD request."""
+            return _RequestContextManager(self._request(hdrs.METH_HEAD, path, **kwargs))
+
+        def put(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager:
+            """Perform an HTTP PUT request."""
+            return _RequestContextManager(self._request(hdrs.METH_PUT, path, **kwargs))
+
+        def patch(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager:
+            """Perform an HTTP PATCH request."""
+            return _RequestContextManager(
+                self._request(hdrs.METH_PATCH, path, **kwargs)
+            )
+
+        def delete(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager:
+            """Perform an HTTP PATCH request."""
+            return _RequestContextManager(
+                self._request(hdrs.METH_DELETE, path, **kwargs)
+            )
+
+    def ws_connect(self, path: StrOrURL, **kwargs: Any) -> _WSRequestContextManager:
+        """Initiate websocket connection.
+
+        The api corresponds to aiohttp.ClientSession.ws_connect.
+
+        """
+        return _WSRequestContextManager(self._ws_connect(path, **kwargs))
+
+    async def _ws_connect(
+        self, path: StrOrURL, **kwargs: Any
+    ) -> ClientWebSocketResponse:
+        ws = await self._session.ws_connect(self.make_url(path), **kwargs)
+        self._websockets.append(ws)
+        return ws
+
+    async def close(self) -> None:
+        """Close all fixtures created by the test client.
+
+        After that point, the TestClient is no longer usable.
+
+        This is an idempotent function: running close multiple times
+        will not have any additional effects.
+
+        close is also run on exit when used as a(n) (asynchronous)
+        context manager.
+
+        """
+        if not self._closed:
+            for resp in self._responses:
+                resp.close()
+            for ws in self._websockets:
+                await ws.close()
+            await self._session.close()
+            await self._server.close()
+            self._closed = True
+
+    def __enter__(self) -> None:
+        raise TypeError("Use async with instead")
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc: Optional[BaseException],
+        tb: Optional[TracebackType],
+    ) -> None:
+        # __exit__ should exist in pair with __enter__ but never executed
+        pass  # pragma: no cover
+
+    async def __aenter__(self) -> Self:
+        await self.start_server()
+        return self
+
+    async def __aexit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc: Optional[BaseException],
+        tb: Optional[TracebackType],
+    ) -> None:
+        await self.close()
+
+
+class AioHTTPTestCase(IsolatedAsyncioTestCase):
+    """A base class to allow for unittest web applications using aiohttp.
+
+    Provides the following:
+
+    * self.client (aiohttp.test_utils.TestClient): an aiohttp test client.
+    * self.loop (asyncio.BaseEventLoop): the event loop in which the
+        application and server are running.
+    * self.app (aiohttp.web.Application): the application returned by
+        self.get_application()
+
+    Note that the TestClient's methods are asynchronous: you have to
+    execute function on the test client using asynchronous methods.
+    """
+
+    async def get_application(self) -> Application:
+        """Get application.
+
+        This method should be overridden
+        to return the aiohttp.web.Application
+        object to test.
+        """
+        return self.get_app()
+
+    def get_app(self) -> Application:
+        """Obsolete method used to constructing web application.
+
+        Use .get_application() coroutine instead.
+        """
+        raise RuntimeError("Did you forget to define get_application()?")
+
+    async def asyncSetUp(self) -> None:
+        self.loop = asyncio.get_running_loop()
+        return await self.setUpAsync()
+
+    async def setUpAsync(self) -> None:
+        self.app = await self.get_application()
+        self.server = await self.get_server(self.app)
+        self.client = await self.get_client(self.server)
+
+        await self.client.start_server()
+
+    async def asyncTearDown(self) -> None:
+        return await self.tearDownAsync()
+
+    async def tearDownAsync(self) -> None:
+        await self.client.close()
+
+    async def get_server(self, app: Application) -> TestServer:
+        """Return a TestServer instance."""
+        return TestServer(app, loop=self.loop)
+
+    async def get_client(self, server: TestServer) -> TestClient[Request, Application]:
+        """Return a TestClient instance."""
+        return TestClient(server, loop=self.loop)
+
+
+def unittest_run_loop(func: Any, *args: Any, **kwargs: Any) -> Any:
+    """
+    A decorator dedicated to use with asynchronous AioHTTPTestCase test methods.
+
+    In 3.8+, this does nothing.
+    """
+    warnings.warn(
+        "Decorator `@unittest_run_loop` is no longer needed in aiohttp 3.8+",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return func
+
+
+_LOOP_FACTORY = Callable[[], asyncio.AbstractEventLoop]
+
+
+@contextlib.contextmanager
+def loop_context(
+    loop_factory: _LOOP_FACTORY = asyncio.new_event_loop, fast: bool = False
+) -> Iterator[asyncio.AbstractEventLoop]:
+    """A contextmanager that creates an event_loop, for test purposes.
+
+    Handles the creation and cleanup of a test loop.
+    """
+    loop = setup_test_loop(loop_factory)
+    yield loop
+    teardown_test_loop(loop, fast=fast)
+
+
+def setup_test_loop(
+    loop_factory: _LOOP_FACTORY = asyncio.new_event_loop,
+) -> asyncio.AbstractEventLoop:
+    """Create and return an asyncio.BaseEventLoop instance.
+
+    The caller should also call teardown_test_loop,
+    once they are done with the loop.
+    """
+    loop = loop_factory()
+    asyncio.set_event_loop(loop)
+    return loop
+
+
+def teardown_test_loop(loop: asyncio.AbstractEventLoop, fast: bool = False) -> None:
+    """Teardown and cleanup an event_loop created by setup_test_loop."""
+    closed = loop.is_closed()
+    if not closed:
+        loop.call_soon(loop.stop)
+        loop.run_forever()
+        loop.close()
+
+    if not fast:
+        gc.collect()
+
+    asyncio.set_event_loop(None)
+
+
+def _create_app_mock() -> mock.MagicMock:
+    def get_dict(app: Any, key: str) -> Any:
+        return app.__app_dict[key]
+
+    def set_dict(app: Any, key: str, value: Any) -> None:
+        app.__app_dict[key] = value
+
+    app = mock.MagicMock(spec=Application)
+    app.__app_dict = {}
+    app.__getitem__ = get_dict
+    app.__setitem__ = set_dict
+
+    app._debug = False
+    app.on_response_prepare = Signal(app)
+    app.on_response_prepare.freeze()
+    return app
+
+
+def _create_transport(sslcontext: Optional[SSLContext] = None) -> mock.Mock:
+    transport = mock.Mock()
+
+    def get_extra_info(key: str) -> Optional[SSLContext]:
+        if key == "sslcontext":
+            return sslcontext
+        else:
+            return None
+
+    transport.get_extra_info.side_effect = get_extra_info
+    return transport
+
+
+def make_mocked_request(
+    method: str,
+    path: str,
+    headers: Any = None,
+    *,
+    match_info: Any = sentinel,
+    version: HttpVersion = HttpVersion(1, 1),
+    closing: bool = False,
+    app: Any = None,
+    writer: Any = sentinel,
+    protocol: Any = sentinel,
+    transport: Any = sentinel,
+    payload: StreamReader = EMPTY_PAYLOAD,
+    sslcontext: Optional[SSLContext] = None,
+    client_max_size: int = 1024**2,
+    loop: Any = ...,
+) -> Request:
+    """Creates mocked web.Request testing purposes.
+
+    Useful in unit tests, when spinning full web server is overkill or
+    specific conditions and errors are hard to trigger.
+    """
+    task = mock.Mock()
+    if loop is ...:
+        # no loop passed, try to get the current one if
+        # its is running as we need a real loop to create
+        # executor jobs to be able to do testing
+        # with a real executor
+        try:
+            loop = asyncio.get_running_loop()
+        except RuntimeError:
+            loop = mock.Mock()
+            loop.create_future.return_value = ()
+
+    if version < HttpVersion(1, 1):
+        closing = True
+
+    if headers:
+        headers = CIMultiDictProxy(CIMultiDict(headers))
+        raw_hdrs = tuple(
+            (k.encode("utf-8"), v.encode("utf-8")) for k, v in headers.items()
+        )
+    else:
+        headers = CIMultiDictProxy(CIMultiDict())
+        raw_hdrs = ()
+
+    chunked = "chunked" in headers.get(hdrs.TRANSFER_ENCODING, "").lower()
+
+    message = RawRequestMessage(
+        method,
+        path,
+        version,
+        headers,
+        raw_hdrs,
+        closing,
+        None,
+        False,
+        chunked,
+        URL(path),
+    )
+    if app is None:
+        app = _create_app_mock()
+
+    if transport is sentinel:
+        transport = _create_transport(sslcontext)
+
+    if protocol is sentinel:
+        protocol = mock.Mock()
+        protocol.transport = transport
+        type(protocol).peername = mock.PropertyMock(
+            return_value=transport.get_extra_info("peername")
+        )
+        type(protocol).ssl_context = mock.PropertyMock(return_value=sslcontext)
+
+    if writer is sentinel:
+        writer = mock.Mock()
+        writer.write_headers = make_mocked_coro(None)
+        writer.write = make_mocked_coro(None)
+        writer.write_eof = make_mocked_coro(None)
+        writer.drain = make_mocked_coro(None)
+        writer.transport = transport
+
+    protocol.transport = transport
+    protocol.writer = writer
+
+    req = Request(
+        message, payload, protocol, writer, task, loop, client_max_size=client_max_size
+    )
+
+    match_info = UrlMappingMatchInfo(
+        {} if match_info is sentinel else match_info, mock.Mock()
+    )
+    match_info.add_app(app)
+    req._match_info = match_info
+
+    return req
+
+
+def make_mocked_coro(
+    return_value: Any = sentinel, raise_exception: Any = sentinel
+) -> Any:
+    """Creates a coroutine mock."""
+
+    async def mock_coro(*args: Any, **kwargs: Any) -> Any:
+        if raise_exception is not sentinel:
+            raise raise_exception
+        if not inspect.isawaitable(return_value):
+            return return_value
+        await return_value
+
+    return mock.Mock(wraps=mock_coro)

backend_service/venv/lib/python3.13/site-packages/aiohttp/tracing.py

@@ -0,0 +1,455 @@
+from types import SimpleNamespace
+from typing import TYPE_CHECKING, Mapping, Optional, Type, TypeVar
+
+import attr
+from aiosignal import Signal
+from multidict import CIMultiDict
+from yarl import URL
+
+from .client_reqrep import ClientResponse
+
+if TYPE_CHECKING:
+    from .client import ClientSession
+
+    _ParamT_contra = TypeVar("_ParamT_contra", contravariant=True)
+    _TracingSignal = Signal[ClientSession, SimpleNamespace, _ParamT_contra]
+
+
+__all__ = (
+    "TraceConfig",
+    "TraceRequestStartParams",
+    "TraceRequestEndParams",
+    "TraceRequestExceptionParams",
+    "TraceConnectionQueuedStartParams",
+    "TraceConnectionQueuedEndParams",
+    "TraceConnectionCreateStartParams",
+    "TraceConnectionCreateEndParams",
+    "TraceConnectionReuseconnParams",
+    "TraceDnsResolveHostStartParams",
+    "TraceDnsResolveHostEndParams",
+    "TraceDnsCacheHitParams",
+    "TraceDnsCacheMissParams",
+    "TraceRequestRedirectParams",
+    "TraceRequestChunkSentParams",
+    "TraceResponseChunkReceivedParams",
+    "TraceRequestHeadersSentParams",
+)
+
+
+class TraceConfig:
+    """First-class used to trace requests launched via ClientSession objects."""
+
+    def __init__(
+        self, trace_config_ctx_factory: Type[SimpleNamespace] = SimpleNamespace
+    ) -> None:
+        self._on_request_start: _TracingSignal[TraceRequestStartParams] = Signal(self)
+        self._on_request_chunk_sent: _TracingSignal[TraceRequestChunkSentParams] = (
+            Signal(self)
+        )
+        self._on_response_chunk_received: _TracingSignal[
+            TraceResponseChunkReceivedParams
+        ] = Signal(self)
+        self._on_request_end: _TracingSignal[TraceRequestEndParams] = Signal(self)
+        self._on_request_exception: _TracingSignal[TraceRequestExceptionParams] = (
+            Signal(self)
+        )
+        self._on_request_redirect: _TracingSignal[TraceRequestRedirectParams] = Signal(
+            self
+        )
+        self._on_connection_queued_start: _TracingSignal[
+            TraceConnectionQueuedStartParams
+        ] = Signal(self)
+        self._on_connection_queued_end: _TracingSignal[
+            TraceConnectionQueuedEndParams
+        ] = Signal(self)
+        self._on_connection_create_start: _TracingSignal[
+            TraceConnectionCreateStartParams
+        ] = Signal(self)
+        self._on_connection_create_end: _TracingSignal[
+            TraceConnectionCreateEndParams
+        ] = Signal(self)
+        self._on_connection_reuseconn: _TracingSignal[
+            TraceConnectionReuseconnParams
+        ] = Signal(self)
+        self._on_dns_resolvehost_start: _TracingSignal[
+            TraceDnsResolveHostStartParams
+        ] = Signal(self)
+        self._on_dns_resolvehost_end: _TracingSignal[TraceDnsResolveHostEndParams] = (
+            Signal(self)
+        )
+        self._on_dns_cache_hit: _TracingSignal[TraceDnsCacheHitParams] = Signal(self)
+        self._on_dns_cache_miss: _TracingSignal[TraceDnsCacheMissParams] = Signal(self)
+        self._on_request_headers_sent: _TracingSignal[TraceRequestHeadersSentParams] = (
+            Signal(self)
+        )
+
+        self._trace_config_ctx_factory = trace_config_ctx_factory
+
+    def trace_config_ctx(
+        self, trace_request_ctx: Optional[Mapping[str, str]] = None
+    ) -> SimpleNamespace:
+        """Return a new trace_config_ctx instance"""
+        return self._trace_config_ctx_factory(trace_request_ctx=trace_request_ctx)
+
+    def freeze(self) -> None:
+        self._on_request_start.freeze()
+        self._on_request_chunk_sent.freeze()
+        self._on_response_chunk_received.freeze()
+        self._on_request_end.freeze()
+        self._on_request_exception.freeze()
+        self._on_request_redirect.freeze()
+        self._on_connection_queued_start.freeze()
+        self._on_connection_queued_end.freeze()
+        self._on_connection_create_start.freeze()
+        self._on_connection_create_end.freeze()
+        self._on_connection_reuseconn.freeze()
+        self._on_dns_resolvehost_start.freeze()
+        self._on_dns_resolvehost_end.freeze()
+        self._on_dns_cache_hit.freeze()
+        self._on_dns_cache_miss.freeze()
+        self._on_request_headers_sent.freeze()
+
+    @property
+    def on_request_start(self) -> "_TracingSignal[TraceRequestStartParams]":
+        return self._on_request_start
+
+    @property
+    def on_request_chunk_sent(
+        self,
+    ) -> "_TracingSignal[TraceRequestChunkSentParams]":
+        return self._on_request_chunk_sent
+
+    @property
+    def on_response_chunk_received(
+        self,
+    ) -> "_TracingSignal[TraceResponseChunkReceivedParams]":
+        return self._on_response_chunk_received
+
+    @property
+    def on_request_end(self) -> "_TracingSignal[TraceRequestEndParams]":
+        return self._on_request_end
+
+    @property
+    def on_request_exception(
+        self,
+    ) -> "_TracingSignal[TraceRequestExceptionParams]":
+        return self._on_request_exception
+
+    @property
+    def on_request_redirect(
+        self,
+    ) -> "_TracingSignal[TraceRequestRedirectParams]":
+        return self._on_request_redirect
+
+    @property
+    def on_connection_queued_start(
+        self,
+    ) -> "_TracingSignal[TraceConnectionQueuedStartParams]":
+        return self._on_connection_queued_start
+
+    @property
+    def on_connection_queued_end(
+        self,
+    ) -> "_TracingSignal[TraceConnectionQueuedEndParams]":
+        return self._on_connection_queued_end
+
+    @property
+    def on_connection_create_start(
+        self,
+    ) -> "_TracingSignal[TraceConnectionCreateStartParams]":
+        return self._on_connection_create_start
+
+    @property
+    def on_connection_create_end(
+        self,
+    ) -> "_TracingSignal[TraceConnectionCreateEndParams]":
+        return self._on_connection_create_end
+
+    @property
+    def on_connection_reuseconn(
+        self,
+    ) -> "_TracingSignal[TraceConnectionReuseconnParams]":
+        return self._on_connection_reuseconn
+
+    @property
+    def on_dns_resolvehost_start(
+        self,
+    ) -> "_TracingSignal[TraceDnsResolveHostStartParams]":
+        return self._on_dns_resolvehost_start
+
+    @property
+    def on_dns_resolvehost_end(
+        self,
+    ) -> "_TracingSignal[TraceDnsResolveHostEndParams]":
+        return self._on_dns_resolvehost_end
+
+    @property
+    def on_dns_cache_hit(self) -> "_TracingSignal[TraceDnsCacheHitParams]":
+        return self._on_dns_cache_hit
+
+    @property
+    def on_dns_cache_miss(self) -> "_TracingSignal[TraceDnsCacheMissParams]":
+        return self._on_dns_cache_miss
+
+    @property
+    def on_request_headers_sent(
+        self,
+    ) -> "_TracingSignal[TraceRequestHeadersSentParams]":
+        return self._on_request_headers_sent
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceRequestStartParams:
+    """Parameters sent by the `on_request_start` signal"""
+
+    method: str
+    url: URL
+    headers: "CIMultiDict[str]"
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceRequestChunkSentParams:
+    """Parameters sent by the `on_request_chunk_sent` signal"""
+
+    method: str
+    url: URL
+    chunk: bytes
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceResponseChunkReceivedParams:
+    """Parameters sent by the `on_response_chunk_received` signal"""
+
+    method: str
+    url: URL
+    chunk: bytes
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceRequestEndParams:
+    """Parameters sent by the `on_request_end` signal"""
+
+    method: str
+    url: URL
+    headers: "CIMultiDict[str]"
+    response: ClientResponse
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceRequestExceptionParams:
+    """Parameters sent by the `on_request_exception` signal"""
+
+    method: str
+    url: URL
+    headers: "CIMultiDict[str]"
+    exception: BaseException
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceRequestRedirectParams:
+    """Parameters sent by the `on_request_redirect` signal"""
+
+    method: str
+    url: URL
+    headers: "CIMultiDict[str]"
+    response: ClientResponse
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceConnectionQueuedStartParams:
+    """Parameters sent by the `on_connection_queued_start` signal"""
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceConnectionQueuedEndParams:
+    """Parameters sent by the `on_connection_queued_end` signal"""
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceConnectionCreateStartParams:
+    """Parameters sent by the `on_connection_create_start` signal"""
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceConnectionCreateEndParams:
+    """Parameters sent by the `on_connection_create_end` signal"""
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceConnectionReuseconnParams:
+    """Parameters sent by the `on_connection_reuseconn` signal"""
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceDnsResolveHostStartParams:
+    """Parameters sent by the `on_dns_resolvehost_start` signal"""
+
+    host: str
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceDnsResolveHostEndParams:
+    """Parameters sent by the `on_dns_resolvehost_end` signal"""
+
+    host: str
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceDnsCacheHitParams:
+    """Parameters sent by the `on_dns_cache_hit` signal"""
+
+    host: str
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceDnsCacheMissParams:
+    """Parameters sent by the `on_dns_cache_miss` signal"""
+
+    host: str
+
+
+@attr.s(auto_attribs=True, frozen=True, slots=True)
+class TraceRequestHeadersSentParams:
+    """Parameters sent by the `on_request_headers_sent` signal"""
+
+    method: str
+    url: URL
+    headers: "CIMultiDict[str]"
+
+
+class Trace:
+    """Internal dependency holder class.
+
+    Used to keep together the main dependencies used
+    at the moment of send a signal.
+    """
+
+    def __init__(
+        self,
+        session: "ClientSession",
+        trace_config: TraceConfig,
+        trace_config_ctx: SimpleNamespace,
+    ) -> None:
+        self._trace_config = trace_config
+        self._trace_config_ctx = trace_config_ctx
+        self._session = session
+
+    async def send_request_start(
+        self, method: str, url: URL, headers: "CIMultiDict[str]"
+    ) -> None:
+        return await self._trace_config.on_request_start.send(
+            self._session,
+            self._trace_config_ctx,
+            TraceRequestStartParams(method, url, headers),
+        )
+
+    async def send_request_chunk_sent(
+        self, method: str, url: URL, chunk: bytes
+    ) -> None:
+        return await self._trace_config.on_request_chunk_sent.send(
+            self._session,
+            self._trace_config_ctx,
+            TraceRequestChunkSentParams(method, url, chunk),
+        )
+
+    async def send_response_chunk_received(
+        self, method: str, url: URL, chunk: bytes
+    ) -> None:
+        return await self._trace_config.on_response_chunk_received.send(
+            self._session,
+            self._trace_config_ctx,
+            TraceResponseChunkReceivedParams(method, url, chunk),
+        )
+
+    async def send_request_end(
+        self,
+        method: str,
+        url: URL,
+        headers: "CIMultiDict[str]",
+        response: ClientResponse,
+    ) -> None:
+        return await self._trace_config.on_request_end.send(
+            self._session,
+            self._trace_config_ctx,
+            TraceRequestEndParams(method, url, headers, response),
+        )
+
+    async def send_request_exception(
+        self,
+        method: str,
+        url: URL,
+        headers: "CIMultiDict[str]",
+        exception: BaseException,
+    ) -> None:
+        return await self._trace_config.on_request_exception.send(
+            self._session,
+            self._trace_config_ctx,
+            TraceRequestExceptionParams(method, url, headers, exception),
+        )
+
+    async def send_request_redirect(
+        self,
+        method: str,
+        url: URL,
+        headers: "CIMultiDict[str]",
+        response: ClientResponse,
+    ) -> None:
+        return await self._trace_config._on_request_redirect.send(
+            self._session,
+            self._trace_config_ctx,
+            TraceRequestRedirectParams(method, url, headers, response),
+        )
+
+    async def send_connection_queued_start(self) -> None:
+        return await self._trace_config.on_connection_queued_start.send(
+            self._session, self._trace_config_ctx, TraceConnectionQueuedStartParams()
+        )
+
+    async def send_connection_queued_end(self) -> None:
+        return await self._trace_config.on_connection_queued_end.send(
+            self._session, self._trace_config_ctx, TraceConnectionQueuedEndParams()
+        )
+
+    async def send_connection_create_start(self) -> None:
+        return await self._trace_config.on_connection_create_start.send(
+            self._session, self._trace_config_ctx, TraceConnectionCreateStartParams()
+        )
+
+    async def send_connection_create_end(self) -> None:
+        return await self._trace_config.on_connection_create_end.send(
+            self._session, self._trace_config_ctx, TraceConnectionCreateEndParams()
+        )
+
+    async def send_connection_reuseconn(self) -> None:
+        return await self._trace_config.on_connection_reuseconn.send(
+            self._session, self._trace_config_ctx, TraceConnectionReuseconnParams()
+        )
+
+    async def send_dns_resolvehost_start(self, host: str) -> None:
+        return await self._trace_config.on_dns_resolvehost_start.send(
+            self._session, self._trace_config_ctx, TraceDnsResolveHostStartParams(host)
+        )
+
+    async def send_dns_resolvehost_end(self, host: str) -> None:
+        return await self._trace_config.on_dns_resolvehost_end.send(
+            self._session, self._trace_config_ctx, TraceDnsResolveHostEndParams(host)
+        )
+
+    async def send_dns_cache_hit(self, host: str) -> None:
+        return await self._trace_config.on_dns_cache_hit.send(
+            self._session, self._trace_config_ctx, TraceDnsCacheHitParams(host)
+        )
+
+    async def send_dns_cache_miss(self, host: str) -> None:
+        return await self._trace_config.on_dns_cache_miss.send(
+            self._session, self._trace_config_ctx, TraceDnsCacheMissParams(host)
+        )
+
+    async def send_request_headers(
+        self, method: str, url: URL, headers: "CIMultiDict[str]"
+    ) -> None:
+        return await self._trace_config._on_request_headers_sent.send(
+            self._session,
+            self._trace_config_ctx,
+            TraceRequestHeadersSentParams(method, url, headers),
+        )

backend_service/venv/lib/python3.13/site-packages/aiohttp/typedefs.py

@@ -0,0 +1,69 @@
+import json
+import os
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Awaitable,
+    Callable,
+    Iterable,
+    Mapping,
+    Protocol,
+    Tuple,
+    Union,
+)
+
+from multidict import CIMultiDict, CIMultiDictProxy, MultiDict, MultiDictProxy, istr
+from yarl import URL, Query as _Query
+
+Query = _Query
+
+DEFAULT_JSON_ENCODER = json.dumps
+DEFAULT_JSON_DECODER = json.loads
+
+if TYPE_CHECKING:
+    _CIMultiDict = CIMultiDict[str]
+    _CIMultiDictProxy = CIMultiDictProxy[str]
+    _MultiDict = MultiDict[str]
+    _MultiDictProxy = MultiDictProxy[str]
+    from http.cookies import BaseCookie, Morsel
+
+    from .web import Request, StreamResponse
+else:
+    _CIMultiDict = CIMultiDict
+    _CIMultiDictProxy = CIMultiDictProxy
+    _MultiDict = MultiDict
+    _MultiDictProxy = MultiDictProxy
+
+Byteish = Union[bytes, bytearray, memoryview]
+JSONEncoder = Callable[[Any], str]
+JSONDecoder = Callable[[str], Any]
+LooseHeaders = Union[
+    Mapping[str, str],
+    Mapping[istr, str],
+    _CIMultiDict,
+    _CIMultiDictProxy,
+    Iterable[Tuple[Union[str, istr], str]],
+]
+RawHeaders = Tuple[Tuple[bytes, bytes], ...]
+StrOrURL = Union[str, URL]
+
+LooseCookiesMappings = Mapping[str, Union[str, "BaseCookie[str]", "Morsel[Any]"]]
+LooseCookiesIterables = Iterable[
+    Tuple[str, Union[str, "BaseCookie[str]", "Morsel[Any]"]]
+]
+LooseCookies = Union[
+    LooseCookiesMappings,
+    LooseCookiesIterables,
+    "BaseCookie[str]",
+]
+
+Handler = Callable[["Request"], Awaitable["StreamResponse"]]
+
+
+class Middleware(Protocol):
+    def __call__(
+        self, request: "Request", handler: Handler
+    ) -> Awaitable["StreamResponse"]: ...
+
+
+PathLike = Union[str, "os.PathLike[str]"]

backend_service/venv/lib/python3.13/site-packages/aiohttp/web.py

@@ -0,0 +1,592 @@
+import asyncio
+import logging
+import os
+import socket
+import sys
+import warnings
+from argparse import ArgumentParser
+from collections.abc import Iterable
+from contextlib import suppress
+from importlib import import_module
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Awaitable,
+    Callable,
+    Iterable as TypingIterable,
+    List,
+    Optional,
+    Set,
+    Type,
+    Union,
+    cast,
+)
+
+from .abc import AbstractAccessLogger
+from .helpers import AppKey as AppKey
+from .log import access_logger
+from .typedefs import PathLike
+from .web_app import Application as Application, CleanupError as CleanupError
+from .web_exceptions import (
+    HTTPAccepted as HTTPAccepted,
+    HTTPBadGateway as HTTPBadGateway,
+    HTTPBadRequest as HTTPBadRequest,
+    HTTPClientError as HTTPClientError,
+    HTTPConflict as HTTPConflict,
+    HTTPCreated as HTTPCreated,
+    HTTPError as HTTPError,
+    HTTPException as HTTPException,
+    HTTPExpectationFailed as HTTPExpectationFailed,
+    HTTPFailedDependency as HTTPFailedDependency,
+    HTTPForbidden as HTTPForbidden,
+    HTTPFound as HTTPFound,
+    HTTPGatewayTimeout as HTTPGatewayTimeout,
+    HTTPGone as HTTPGone,
+    HTTPInsufficientStorage as HTTPInsufficientStorage,
+    HTTPInternalServerError as HTTPInternalServerError,
+    HTTPLengthRequired as HTTPLengthRequired,
+    HTTPMethodNotAllowed as HTTPMethodNotAllowed,
+    HTTPMisdirectedRequest as HTTPMisdirectedRequest,
+    HTTPMove as HTTPMove,
+    HTTPMovedPermanently as HTTPMovedPermanently,
+    HTTPMultipleChoices as HTTPMultipleChoices,
+    HTTPNetworkAuthenticationRequired as HTTPNetworkAuthenticationRequired,
+    HTTPNoContent as HTTPNoContent,
+    HTTPNonAuthoritativeInformation as HTTPNonAuthoritativeInformation,
+    HTTPNotAcceptable as HTTPNotAcceptable,
+    HTTPNotExtended as HTTPNotExtended,
+    HTTPNotFound as HTTPNotFound,
+    HTTPNotImplemented as HTTPNotImplemented,
+    HTTPNotModified as HTTPNotModified,
+    HTTPOk as HTTPOk,
+    HTTPPartialContent as HTTPPartialContent,
+    HTTPPaymentRequired as HTTPPaymentRequired,
+    HTTPPermanentRedirect as HTTPPermanentRedirect,
+    HTTPPreconditionFailed as HTTPPreconditionFailed,
+    HTTPPreconditionRequired as HTTPPreconditionRequired,
+    HTTPProxyAuthenticationRequired as HTTPProxyAuthenticationRequired,
+    HTTPRedirection as HTTPRedirection,
+    HTTPRequestEntityTooLarge as HTTPRequestEntityTooLarge,
+    HTTPRequestHeaderFieldsTooLarge as HTTPRequestHeaderFieldsTooLarge,
+    HTTPRequestRangeNotSatisfiable as HTTPRequestRangeNotSatisfiable,
+    HTTPRequestTimeout as HTTPRequestTimeout,
+    HTTPRequestURITooLong as HTTPRequestURITooLong,
+    HTTPResetContent as HTTPResetContent,
+    HTTPSeeOther as HTTPSeeOther,
+    HTTPServerError as HTTPServerError,
+    HTTPServiceUnavailable as HTTPServiceUnavailable,
+    HTTPSuccessful as HTTPSuccessful,
+    HTTPTemporaryRedirect as HTTPTemporaryRedirect,
+    HTTPTooManyRequests as HTTPTooManyRequests,
+    HTTPUnauthorized as HTTPUnauthorized,
+    HTTPUnavailableForLegalReasons as HTTPUnavailableForLegalReasons,
+    HTTPUnprocessableEntity as HTTPUnprocessableEntity,
+    HTTPUnsupportedMediaType as HTTPUnsupportedMediaType,
+    HTTPUpgradeRequired as HTTPUpgradeRequired,
+    HTTPUseProxy as HTTPUseProxy,
+    HTTPVariantAlsoNegotiates as HTTPVariantAlsoNegotiates,
+    HTTPVersionNotSupported as HTTPVersionNotSupported,
+    NotAppKeyWarning as NotAppKeyWarning,
+)
+from .web_fileresponse import FileResponse as FileResponse
+from .web_log import AccessLogger
+from .web_middlewares import (
+    middleware as middleware,
+    normalize_path_middleware as normalize_path_middleware,
+)
+from .web_protocol import (
+    PayloadAccessError as PayloadAccessError,
+    RequestHandler as RequestHandler,
+    RequestPayloadError as RequestPayloadError,
+)
+from .web_request import (
+    BaseRequest as BaseRequest,
+    FileField as FileField,
+    Request as Request,
+)
+from .web_response import (
+    ContentCoding as ContentCoding,
+    Response as Response,
+    StreamResponse as StreamResponse,
+    json_response as json_response,
+)
+from .web_routedef import (
+    AbstractRouteDef as AbstractRouteDef,
+    RouteDef as RouteDef,
+    RouteTableDef as RouteTableDef,
+    StaticDef as StaticDef,
+    delete as delete,
+    get as get,
+    head as head,
+    options as options,
+    patch as patch,
+    post as post,
+    put as put,
+    route as route,
+    static as static,
+    view as view,
+)
+from .web_runner import (
+    AppRunner as AppRunner,
+    BaseRunner as BaseRunner,
+    BaseSite as BaseSite,
+    GracefulExit as GracefulExit,
+    NamedPipeSite as NamedPipeSite,
+    ServerRunner as ServerRunner,
+    SockSite as SockSite,
+    TCPSite as TCPSite,
+    UnixSite as UnixSite,
+)
+from .web_server import Server as Server
+from .web_urldispatcher import (
+    AbstractResource as AbstractResource,
+    AbstractRoute as AbstractRoute,
+    DynamicResource as DynamicResource,
+    PlainResource as PlainResource,
+    PrefixedSubAppResource as PrefixedSubAppResource,
+    Resource as Resource,
+    ResourceRoute as ResourceRoute,
+    StaticResource as StaticResource,
+    UrlDispatcher as UrlDispatcher,
+    UrlMappingMatchInfo as UrlMappingMatchInfo,
+    View as View,
+)
+from .web_ws import (
+    WebSocketReady as WebSocketReady,
+    WebSocketResponse as WebSocketResponse,
+    WSMsgType as WSMsgType,
+)
+
+__all__ = (
+    # web_app
+    "AppKey",
+    "Application",
+    "CleanupError",
+    # web_exceptions
+    "NotAppKeyWarning",
+    "HTTPAccepted",
+    "HTTPBadGateway",
+    "HTTPBadRequest",
+    "HTTPClientError",
+    "HTTPConflict",
+    "HTTPCreated",
+    "HTTPError",
+    "HTTPException",
+    "HTTPExpectationFailed",
+    "HTTPFailedDependency",
+    "HTTPForbidden",
+    "HTTPFound",
+    "HTTPGatewayTimeout",
+    "HTTPGone",
+    "HTTPInsufficientStorage",
+    "HTTPInternalServerError",
+    "HTTPLengthRequired",
+    "HTTPMethodNotAllowed",
+    "HTTPMisdirectedRequest",
+    "HTTPMove",
+    "HTTPMovedPermanently",
+    "HTTPMultipleChoices",
+    "HTTPNetworkAuthenticationRequired",
+    "HTTPNoContent",
+    "HTTPNonAuthoritativeInformation",
+    "HTTPNotAcceptable",
+    "HTTPNotExtended",
+    "HTTPNotFound",
+    "HTTPNotImplemented",
+    "HTTPNotModified",
+    "HTTPOk",
+    "HTTPPartialContent",
+    "HTTPPaymentRequired",
+    "HTTPPermanentRedirect",
+    "HTTPPreconditionFailed",
+    "HTTPPreconditionRequired",
+    "HTTPProxyAuthenticationRequired",
+    "HTTPRedirection",
+    "HTTPRequestEntityTooLarge",
+    "HTTPRequestHeaderFieldsTooLarge",
+    "HTTPRequestRangeNotSatisfiable",
+    "HTTPRequestTimeout",
+    "HTTPRequestURITooLong",
+    "HTTPResetContent",
+    "HTTPSeeOther",
+    "HTTPServerError",
+    "HTTPServiceUnavailable",
+    "HTTPSuccessful",
+    "HTTPTemporaryRedirect",
+    "HTTPTooManyRequests",
+    "HTTPUnauthorized",
+    "HTTPUnavailableForLegalReasons",
+    "HTTPUnprocessableEntity",
+    "HTTPUnsupportedMediaType",
+    "HTTPUpgradeRequired",
+    "HTTPUseProxy",
+    "HTTPVariantAlsoNegotiates",
+    "HTTPVersionNotSupported",
+    # web_fileresponse
+    "FileResponse",
+    # web_middlewares
+    "middleware",
+    "normalize_path_middleware",
+    # web_protocol
+    "PayloadAccessError",
+    "RequestHandler",
+    "RequestPayloadError",
+    # web_request
+    "BaseRequest",
+    "FileField",
+    "Request",
+    # web_response
+    "ContentCoding",
+    "Response",
+    "StreamResponse",
+    "json_response",
+    # web_routedef
+    "AbstractRouteDef",
+    "RouteDef",
+    "RouteTableDef",
+    "StaticDef",
+    "delete",
+    "get",
+    "head",
+    "options",
+    "patch",
+    "post",
+    "put",
+    "route",
+    "static",
+    "view",
+    # web_runner
+    "AppRunner",
+    "BaseRunner",
+    "BaseSite",
+    "GracefulExit",
+    "ServerRunner",
+    "SockSite",
+    "TCPSite",
+    "UnixSite",
+    "NamedPipeSite",
+    # web_server
+    "Server",
+    # web_urldispatcher
+    "AbstractResource",
+    "AbstractRoute",
+    "DynamicResource",
+    "PlainResource",
+    "PrefixedSubAppResource",
+    "Resource",
+    "ResourceRoute",
+    "StaticResource",
+    "UrlDispatcher",
+    "UrlMappingMatchInfo",
+    "View",
+    # web_ws
+    "WebSocketReady",
+    "WebSocketResponse",
+    "WSMsgType",
+    # web
+    "run_app",
+)
+
+
+if TYPE_CHECKING:
+    from ssl import SSLContext
+else:
+    try:
+        from ssl import SSLContext
+    except ImportError:  # pragma: no cover
+        SSLContext = object  # type: ignore[misc,assignment]
+
+# Only display warning when using -Wdefault, -We, -X dev or similar.
+warnings.filterwarnings("ignore", category=NotAppKeyWarning, append=True)
+
+HostSequence = TypingIterable[str]
+
+
+async def _run_app(
+    app: Union[Application, Awaitable[Application]],
+    *,
+    host: Optional[Union[str, HostSequence]] = None,
+    port: Optional[int] = None,
+    path: Union[PathLike, TypingIterable[PathLike], None] = None,
+    sock: Optional[Union[socket.socket, TypingIterable[socket.socket]]] = None,
+    ssl_context: Optional[SSLContext] = None,
+    print: Optional[Callable[..., None]] = print,
+    backlog: int = 128,
+    reuse_address: Optional[bool] = None,
+    reuse_port: Optional[bool] = None,
+    **kwargs: Any,  # TODO(PY311): Use Unpack
+) -> None:
+    # An internal function to actually do all dirty job for application running
+    if asyncio.iscoroutine(app):
+        app = await app
+
+    app = cast(Application, app)
+
+    runner = AppRunner(app, **kwargs)
+
+    await runner.setup()
+
+    sites: List[BaseSite] = []
+
+    try:
+        if host is not None:
+            if isinstance(host, str):
+                sites.append(
+                    TCPSite(
+                        runner,
+                        host,
+                        port,
+                        ssl_context=ssl_context,
+                        backlog=backlog,
+                        reuse_address=reuse_address,
+                        reuse_port=reuse_port,
+                    )
+                )
+            else:
+                for h in host:
+                    sites.append(
+                        TCPSite(
+                            runner,
+                            h,
+                            port,
+                            ssl_context=ssl_context,
+                            backlog=backlog,
+                            reuse_address=reuse_address,
+                            reuse_port=reuse_port,
+                        )
+                    )
+        elif path is None and sock is None or port is not None:
+            sites.append(
+                TCPSite(
+                    runner,
+                    port=port,
+                    ssl_context=ssl_context,
+                    backlog=backlog,
+                    reuse_address=reuse_address,
+                    reuse_port=reuse_port,
+                )
+            )
+
+        if path is not None:
+            if isinstance(path, (str, os.PathLike)):
+                sites.append(
+                    UnixSite(
+                        runner,
+                        path,
+                        ssl_context=ssl_context,
+                        backlog=backlog,
+                    )
+                )
+            else:
+                for p in path:
+                    sites.append(
+                        UnixSite(
+                            runner,
+                            p,
+                            ssl_context=ssl_context,
+                            backlog=backlog,
+                        )
+                    )
+
+        if sock is not None:
+            if not isinstance(sock, Iterable):
+                sites.append(
+                    SockSite(
+                        runner,
+                        sock,
+                        ssl_context=ssl_context,
+                        backlog=backlog,
+                    )
+                )
+            else:
+                for s in sock:
+                    sites.append(
+                        SockSite(
+                            runner,
+                            s,
+                            ssl_context=ssl_context,
+                            backlog=backlog,
+                        )
+                    )
+        for site in sites:
+            await site.start()
+
+        if print:  # pragma: no branch
+            names = sorted(str(s.name) for s in runner.sites)
+            print(
+                "======== Running on {} ========\n"
+                "(Press CTRL+C to quit)".format(", ".join(names))
+            )
+
+        # sleep forever by 1 hour intervals,
+        while True:
+            await asyncio.sleep(3600)
+    finally:
+        await runner.cleanup()
+
+
+def _cancel_tasks(
+    to_cancel: Set["asyncio.Task[Any]"], loop: asyncio.AbstractEventLoop
+) -> None:
+    if not to_cancel:
+        return
+
+    for task in to_cancel:
+        task.cancel()
+
+    loop.run_until_complete(asyncio.gather(*to_cancel, return_exceptions=True))
+
+    for task in to_cancel:
+        if task.cancelled():
+            continue
+        if task.exception() is not None:
+            loop.call_exception_handler(
+                {
+                    "message": "unhandled exception during asyncio.run() shutdown",
+                    "exception": task.exception(),
+                    "task": task,
+                }
+            )
+
+
+def run_app(
+    app: Union[Application, Awaitable[Application]],
+    *,
+    host: Optional[Union[str, HostSequence]] = None,
+    port: Optional[int] = None,
+    path: Union[PathLike, TypingIterable[PathLike], None] = None,
+    sock: Optional[Union[socket.socket, TypingIterable[socket.socket]]] = None,
+    shutdown_timeout: float = 60.0,
+    keepalive_timeout: float = 75.0,
+    ssl_context: Optional[SSLContext] = None,
+    print: Optional[Callable[..., None]] = print,
+    backlog: int = 128,
+    access_log_class: Type[AbstractAccessLogger] = AccessLogger,
+    access_log_format: str = AccessLogger.LOG_FORMAT,
+    access_log: Optional[logging.Logger] = access_logger,
+    handle_signals: bool = True,
+    reuse_address: Optional[bool] = None,
+    reuse_port: Optional[bool] = None,
+    handler_cancellation: bool = False,
+    loop: Optional[asyncio.AbstractEventLoop] = None,
+    **kwargs: Any,
+) -> None:
+    """Run an app locally"""
+    if loop is None:
+        loop = asyncio.new_event_loop()
+
+    # Configure if and only if in debugging mode and using the default logger
+    if loop.get_debug() and access_log and access_log.name == "aiohttp.access":
+        if access_log.level == logging.NOTSET:
+            access_log.setLevel(logging.DEBUG)
+        if not access_log.hasHandlers():
+            access_log.addHandler(logging.StreamHandler())
+
+    main_task = loop.create_task(
+        _run_app(
+            app,
+            host=host,
+            port=port,
+            path=path,
+            sock=sock,
+            shutdown_timeout=shutdown_timeout,
+            keepalive_timeout=keepalive_timeout,
+            ssl_context=ssl_context,
+            print=print,
+            backlog=backlog,
+            access_log_class=access_log_class,
+            access_log_format=access_log_format,
+            access_log=access_log,
+            handle_signals=handle_signals,
+            reuse_address=reuse_address,
+            reuse_port=reuse_port,
+            handler_cancellation=handler_cancellation,
+            **kwargs,
+        )
+    )
+
+    try:
+        asyncio.set_event_loop(loop)
+        loop.run_until_complete(main_task)
+    except (GracefulExit, KeyboardInterrupt):  # pragma: no cover
+        pass
+    finally:
+        try:
+            main_task.cancel()
+            with suppress(asyncio.CancelledError):
+                loop.run_until_complete(main_task)
+        finally:
+            _cancel_tasks(asyncio.all_tasks(loop), loop)
+            loop.run_until_complete(loop.shutdown_asyncgens())
+            loop.close()
+
+
+def main(argv: List[str]) -> None:
+    arg_parser = ArgumentParser(
+        description="aiohttp.web Application server", prog="aiohttp.web"
+    )
+    arg_parser.add_argument(
+        "entry_func",
+        help=(
+            "Callable returning the `aiohttp.web.Application` instance to "
+            "run. Should be specified in the 'module:function' syntax."
+        ),
+        metavar="entry-func",
+    )
+    arg_parser.add_argument(
+        "-H",
+        "--hostname",
+        help="TCP/IP hostname to serve on (default: localhost)",
+        default=None,
+    )
+    arg_parser.add_argument(
+        "-P",
+        "--port",
+        help="TCP/IP port to serve on (default: %(default)r)",
+        type=int,
+        default=8080,
+    )
+    arg_parser.add_argument(
+        "-U",
+        "--path",
+        help="Unix file system path to serve on. Can be combined with hostname "
+        "to serve on both Unix and TCP.",
+    )
+    args, extra_argv = arg_parser.parse_known_args(argv)
+
+    # Import logic
+    mod_str, _, func_str = args.entry_func.partition(":")
+    if not func_str or not mod_str:
+        arg_parser.error("'entry-func' not in 'module:function' syntax")
+    if mod_str.startswith("."):
+        arg_parser.error("relative module names not supported")
+    try:
+        module = import_module(mod_str)
+    except ImportError as ex:
+        arg_parser.error(f"unable to import {mod_str}: {ex}")
+    try:
+        func = getattr(module, func_str)
+    except AttributeError:
+        arg_parser.error(f"module {mod_str!r} has no attribute {func_str!r}")
+
+    # Compatibility logic
+    if args.path is not None and not hasattr(socket, "AF_UNIX"):
+        arg_parser.error(
+            "file system paths not supported by your operating environment"
+        )
+
+    logging.basicConfig(level=logging.DEBUG)
+
+    if args.path and args.hostname is None:
+        host = port = None
+    else:
+        host = args.hostname or "localhost"
+        port = args.port
+
+    app = func(extra_argv)
+    run_app(app, host=host, port=port, path=args.path)
+    arg_parser.exit(message="Stopped\n")
+
+
+if __name__ == "__main__":  # pragma: no branch
+    main(sys.argv[1:])  # pragma: no cover

backend_service/venv/lib/python3.13/site-packages/aiohttp/web_app.py

@@ -0,0 +1,620 @@
+import asyncio
+import logging
+import warnings
+from functools import lru_cache, partial, update_wrapper
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    AsyncIterator,
+    Awaitable,
+    Callable,
+    Dict,
+    Iterable,
+    Iterator,
+    List,
+    Mapping,
+    MutableMapping,
+    Optional,
+    Sequence,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+    cast,
+    overload,
+)
+
+from aiosignal import Signal
+from frozenlist import FrozenList
+
+from . import hdrs
+from .abc import (
+    AbstractAccessLogger,
+    AbstractMatchInfo,
+    AbstractRouter,
+    AbstractStreamWriter,
+)
+from .helpers import DEBUG, AppKey
+from .http_parser import RawRequestMessage
+from .log import web_logger
+from .streams import StreamReader
+from .typedefs import Handler, Middleware
+from .web_exceptions import NotAppKeyWarning
+from .web_log import AccessLogger
+from .web_middlewares import _fix_request_current_app
+from .web_protocol import RequestHandler
+from .web_request import Request
+from .web_response import StreamResponse
+from .web_routedef import AbstractRouteDef
+from .web_server import Server
+from .web_urldispatcher import (
+    AbstractResource,
+    AbstractRoute,
+    Domain,
+    MaskDomain,
+    MatchedSubAppResource,
+    PrefixedSubAppResource,
+    SystemRoute,
+    UrlDispatcher,
+)
+
+__all__ = ("Application", "CleanupError")
+
+
+if TYPE_CHECKING:
+    _AppSignal = Signal["Application"]
+    _RespPrepareSignal = Signal[Request, StreamResponse]
+    _Middlewares = FrozenList[Middleware]
+    _MiddlewaresHandlers = Optional[Sequence[Tuple[Middleware, bool]]]
+    _Subapps = List["Application"]
+else:
+    # No type checker mode, skip types
+    _AppSignal = Signal
+    _RespPrepareSignal = Signal
+    _Middlewares = FrozenList
+    _MiddlewaresHandlers = Optional[Sequence]
+    _Subapps = List
+
+_T = TypeVar("_T")
+_U = TypeVar("_U")
+_Resource = TypeVar("_Resource", bound=AbstractResource)
+
+
+def _build_middlewares(
+    handler: Handler, apps: Tuple["Application", ...]
+) -> Callable[[Request], Awaitable[StreamResponse]]:
+    """Apply middlewares to handler."""
+    for app in apps[::-1]:
+        for m, _ in app._middlewares_handlers:  # type: ignore[union-attr]
+            handler = update_wrapper(partial(m, handler=handler), handler)
+    return handler
+
+
+_cached_build_middleware = lru_cache(maxsize=1024)(_build_middlewares)
+
+
+class Application(MutableMapping[Union[str, AppKey[Any]], Any]):
+    ATTRS = frozenset(
+        [
+            "logger",
+            "_debug",
+            "_router",
+            "_loop",
+            "_handler_args",
+            "_middlewares",
+            "_middlewares_handlers",
+            "_has_legacy_middlewares",
+            "_run_middlewares",
+            "_state",
+            "_frozen",
+            "_pre_frozen",
+            "_subapps",
+            "_on_response_prepare",
+            "_on_startup",
+            "_on_shutdown",
+            "_on_cleanup",
+            "_client_max_size",
+            "_cleanup_ctx",
+        ]
+    )
+
+    def __init__(
+        self,
+        *,
+        logger: logging.Logger = web_logger,
+        router: Optional[UrlDispatcher] = None,
+        middlewares: Iterable[Middleware] = (),
+        handler_args: Optional[Mapping[str, Any]] = None,
+        client_max_size: int = 1024**2,
+        loop: Optional[asyncio.AbstractEventLoop] = None,
+        debug: Any = ...,  # mypy doesn't support ellipsis
+    ) -> None:
+        if router is None:
+            router = UrlDispatcher()
+        else:
+            warnings.warn(
+                "router argument is deprecated", DeprecationWarning, stacklevel=2
+            )
+        assert isinstance(router, AbstractRouter), router
+
+        if loop is not None:
+            warnings.warn(
+                "loop argument is deprecated", DeprecationWarning, stacklevel=2
+            )
+
+        if debug is not ...:
+            warnings.warn(
+                "debug argument is deprecated", DeprecationWarning, stacklevel=2
+            )
+        self._debug = debug
+        self._router: UrlDispatcher = router
+        self._loop = loop
+        self._handler_args = handler_args
+        self.logger = logger
+
+        self._middlewares: _Middlewares = FrozenList(middlewares)
+
+        # initialized on freezing
+        self._middlewares_handlers: _MiddlewaresHandlers = None
+        # initialized on freezing
+        self._run_middlewares: Optional[bool] = None
+        self._has_legacy_middlewares: bool = True
+
+        self._state: Dict[Union[AppKey[Any], str], object] = {}
+        self._frozen = False
+        self._pre_frozen = False
+        self._subapps: _Subapps = []
+
+        self._on_response_prepare: _RespPrepareSignal = Signal(self)
+        self._on_startup: _AppSignal = Signal(self)
+        self._on_shutdown: _AppSignal = Signal(self)
+        self._on_cleanup: _AppSignal = Signal(self)
+        self._cleanup_ctx = CleanupContext()
+        self._on_startup.append(self._cleanup_ctx._on_startup)
+        self._on_cleanup.append(self._cleanup_ctx._on_cleanup)
+        self._client_max_size = client_max_size
+
+    def __init_subclass__(cls: Type["Application"]) -> None:
+        warnings.warn(
+            "Inheritance class {} from web.Application "
+            "is discouraged".format(cls.__name__),
+            DeprecationWarning,
+            stacklevel=3,
+        )
+
+    if DEBUG:  # pragma: no cover
+
+        def __setattr__(self, name: str, val: Any) -> None:
+            if name not in self.ATTRS:
+                warnings.warn(
+                    "Setting custom web.Application.{} attribute "
+                    "is discouraged".format(name),
+                    DeprecationWarning,
+                    stacklevel=2,
+                )
+            super().__setattr__(name, val)
+
+    # MutableMapping API
+
+    def __eq__(self, other: object) -> bool:
+        return self is other
+
+    @overload  # type: ignore[override]
+    def __getitem__(self, key: AppKey[_T]) -> _T: ...
+
+    @overload
+    def __getitem__(self, key: str) -> Any: ...
+
+    def __getitem__(self, key: Union[str, AppKey[_T]]) -> Any:
+        return self._state[key]
+
+    def _check_frozen(self) -> None:
+        if self._frozen:
+            warnings.warn(
+                "Changing state of started or joined application is deprecated",
+                DeprecationWarning,
+                stacklevel=3,
+            )
+
+    @overload  # type: ignore[override]
+    def __setitem__(self, key: AppKey[_T], value: _T) -> None: ...
+
+    @overload
+    def __setitem__(self, key: str, value: Any) -> None: ...
+
+    def __setitem__(self, key: Union[str, AppKey[_T]], value: Any) -> None:
+        self._check_frozen()
+        if not isinstance(key, AppKey):
+            warnings.warn(
+                "It is recommended to use web.AppKey instances for keys.\n"
+                + "https://docs.aiohttp.org/en/stable/web_advanced.html"
+                + "#application-s-config",
+                category=NotAppKeyWarning,
+                stacklevel=2,
+            )
+        self._state[key] = value
+
+    def __delitem__(self, key: Union[str, AppKey[_T]]) -> None:
+        self._check_frozen()
+        del self._state[key]
+
+    def __len__(self) -> int:
+        return len(self._state)
+
+    def __iter__(self) -> Iterator[Union[str, AppKey[Any]]]:
+        return iter(self._state)
+
+    def __hash__(self) -> int:
+        return id(self)
+
+    @overload  # type: ignore[override]
+    def get(self, key: AppKey[_T], default: None = ...) -> Optional[_T]: ...
+
+    @overload
+    def get(self, key: AppKey[_T], default: _U) -> Union[_T, _U]: ...
+
+    @overload
+    def get(self, key: str, default: Any = ...) -> Any: ...
+
+    def get(self, key: Union[str, AppKey[_T]], default: Any = None) -> Any:
+        return self._state.get(key, default)
+
+    ########
+    @property
+    def loop(self) -> asyncio.AbstractEventLoop:
+        # Technically the loop can be None
+        # but we mask it by explicit type cast
+        # to provide more convenient type annotation
+        warnings.warn("loop property is deprecated", DeprecationWarning, stacklevel=2)
+        return cast(asyncio.AbstractEventLoop, self._loop)
+
+    def _set_loop(self, loop: Optional[asyncio.AbstractEventLoop]) -> None:
+        if loop is None:
+            loop = asyncio.get_event_loop()
+        if self._loop is not None and self._loop is not loop:
+            raise RuntimeError(
+                "web.Application instance initialized with different loop"
+            )
+
+        self._loop = loop
+
+        # set loop debug
+        if self._debug is ...:
+            self._debug = loop.get_debug()
+
+        # set loop to sub applications
+        for subapp in self._subapps:
+            subapp._set_loop(loop)
+
+    @property
+    def pre_frozen(self) -> bool:
+        return self._pre_frozen
+
+    def pre_freeze(self) -> None:
+        if self._pre_frozen:
+            return
+
+        self._pre_frozen = True
+        self._middlewares.freeze()
+        self._router.freeze()
+        self._on_response_prepare.freeze()
+        self._cleanup_ctx.freeze()
+        self._on_startup.freeze()
+        self._on_shutdown.freeze()
+        self._on_cleanup.freeze()
+        self._middlewares_handlers = tuple(self._prepare_middleware())
+        self._has_legacy_middlewares = any(
+            not new_style for _, new_style in self._middlewares_handlers
+        )
+
+        # If current app and any subapp do not have middlewares avoid run all
+        # of the code footprint that it implies, which have a middleware
+        # hardcoded per app that sets up the current_app attribute. If no
+        # middlewares are configured the handler will receive the proper
+        # current_app without needing all of this code.
+        self._run_middlewares = True if self.middlewares else False
+
+        for subapp in self._subapps:
+            subapp.pre_freeze()
+            self._run_middlewares = self._run_middlewares or subapp._run_middlewares
+
+    @property
+    def frozen(self) -> bool:
+        return self._frozen
+
+    def freeze(self) -> None:
+        if self._frozen:
+            return
+
+        self.pre_freeze()
+        self._frozen = True
+        for subapp in self._subapps:
+            subapp.freeze()
+
+    @property
+    def debug(self) -> bool:
+        warnings.warn("debug property is deprecated", DeprecationWarning, stacklevel=2)
+        return self._debug  # type: ignore[no-any-return]
+
+    def _reg_subapp_signals(self, subapp: "Application") -> None:
+        def reg_handler(signame: str) -> None:
+            subsig = getattr(subapp, signame)
+
+            async def handler(app: "Application") -> None:
+                await subsig.send(subapp)
+
+            appsig = getattr(self, signame)
+            appsig.append(handler)
+
+        reg_handler("on_startup")
+        reg_handler("on_shutdown")
+        reg_handler("on_cleanup")
+
+    def add_subapp(self, prefix: str, subapp: "Application") -> PrefixedSubAppResource:
+        if not isinstance(prefix, str):
+            raise TypeError("Prefix must be str")
+        prefix = prefix.rstrip("/")
+        if not prefix:
+            raise ValueError("Prefix cannot be empty")
+        factory = partial(PrefixedSubAppResource, prefix, subapp)
+        return self._add_subapp(factory, subapp)
+
+    def _add_subapp(
+        self, resource_factory: Callable[[], _Resource], subapp: "Application"
+    ) -> _Resource:
+        if self.frozen:
+            raise RuntimeError("Cannot add sub application to frozen application")
+        if subapp.frozen:
+            raise RuntimeError("Cannot add frozen application")
+        resource = resource_factory()
+        self.router.register_resource(resource)
+        self._reg_subapp_signals(subapp)
+        self._subapps.append(subapp)
+        subapp.pre_freeze()
+        if self._loop is not None:
+            subapp._set_loop(self._loop)
+        return resource
+
+    def add_domain(self, domain: str, subapp: "Application") -> MatchedSubAppResource:
+        if not isinstance(domain, str):
+            raise TypeError("Domain must be str")
+        elif "*" in domain:
+            rule: Domain = MaskDomain(domain)
+        else:
+            rule = Domain(domain)
+        factory = partial(MatchedSubAppResource, rule, subapp)
+        return self._add_subapp(factory, subapp)
+
+    def add_routes(self, routes: Iterable[AbstractRouteDef]) -> List[AbstractRoute]:
+        return self.router.add_routes(routes)
+
+    @property
+    def on_response_prepare(self) -> _RespPrepareSignal:
+        return self._on_response_prepare
+
+    @property
+    def on_startup(self) -> _AppSignal:
+        return self._on_startup
+
+    @property
+    def on_shutdown(self) -> _AppSignal:
+        return self._on_shutdown
+
+    @property
+    def on_cleanup(self) -> _AppSignal:
+        return self._on_cleanup
+
+    @property
+    def cleanup_ctx(self) -> "CleanupContext":
+        return self._cleanup_ctx
+
+    @property
+    def router(self) -> UrlDispatcher:
+        return self._router
+
+    @property
+    def middlewares(self) -> _Middlewares:
+        return self._middlewares
+
+    def _make_handler(
+        self,
+        *,
+        loop: Optional[asyncio.AbstractEventLoop] = None,
+        access_log_class: Type[AbstractAccessLogger] = AccessLogger,
+        **kwargs: Any,
+    ) -> Server:
+
+        if not issubclass(access_log_class, AbstractAccessLogger):
+            raise TypeError(
+                "access_log_class must be subclass of "
+                "aiohttp.abc.AbstractAccessLogger, got {}".format(access_log_class)
+            )
+
+        self._set_loop(loop)
+        self.freeze()
+
+        kwargs["debug"] = self._debug
+        kwargs["access_log_class"] = access_log_class
+        if self._handler_args:
+            for k, v in self._handler_args.items():
+                kwargs[k] = v
+
+        return Server(
+            self._handle,  # type: ignore[arg-type]
+            request_factory=self._make_request,
+            loop=self._loop,
+            **kwargs,
+        )
+
+    def make_handler(
+        self,
+        *,
+        loop: Optional[asyncio.AbstractEventLoop] = None,
+        access_log_class: Type[AbstractAccessLogger] = AccessLogger,
+        **kwargs: Any,
+    ) -> Server:
+
+        warnings.warn(
+            "Application.make_handler(...) is deprecated, use AppRunner API instead",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
+        return self._make_handler(
+            loop=loop, access_log_class=access_log_class, **kwargs
+        )
+
+    async def startup(self) -> None:
+        """Causes on_startup signal
+
+        Should be called in the event loop along with the request handler.
+        """
+        await self.on_startup.send(self)
+
+    async def shutdown(self) -> None:
+        """Causes on_shutdown signal
+
+        Should be called before cleanup()
+        """
+        await self.on_shutdown.send(self)
+
+    async def cleanup(self) -> None:
+        """Causes on_cleanup signal
+
+        Should be called after shutdown()
+        """
+        if self.on_cleanup.frozen:
+            await self.on_cleanup.send(self)
+        else:
+            # If an exception occurs in startup, ensure cleanup contexts are completed.
+            await self._cleanup_ctx._on_cleanup(self)
+
+    def _make_request(
+        self,
+        message: RawRequestMessage,
+        payload: StreamReader,
+        protocol: RequestHandler,
+        writer: AbstractStreamWriter,
+        task: "asyncio.Task[None]",
+        _cls: Type[Request] = Request,
+    ) -> Request:
+        if TYPE_CHECKING:
+            assert self._loop is not None
+        return _cls(
+            message,
+            payload,
+            protocol,
+            writer,
+            task,
+            self._loop,
+            client_max_size=self._client_max_size,
+        )
+
+    def _prepare_middleware(self) -> Iterator[Tuple[Middleware, bool]]:
+        for m in reversed(self._middlewares):
+            if getattr(m, "__middleware_version__", None) == 1:
+                yield m, True
+            else:
+                warnings.warn(
+                    f'old-style middleware "{m!r}" deprecated, see #2252',
+                    DeprecationWarning,
+                    stacklevel=2,
+                )
+                yield m, False
+
+        yield _fix_request_current_app(self), True
+
+    async def _handle(self, request: Request) -> StreamResponse:
+        loop = asyncio.get_event_loop()
+        debug = loop.get_debug()
+        match_info = await self._router.resolve(request)
+        if debug:  # pragma: no cover
+            if not isinstance(match_info, AbstractMatchInfo):
+                raise TypeError(
+                    "match_info should be AbstractMatchInfo "
+                    "instance, not {!r}".format(match_info)
+                )
+        match_info.add_app(self)
+
+        match_info.freeze()
+
+        request._match_info = match_info
+
+        if request.headers.get(hdrs.EXPECT):
+            resp = await match_info.expect_handler(request)
+            await request.writer.drain()
+            if resp is not None:
+                return resp
+
+        handler = match_info.handler
+
+        if self._run_middlewares:
+            # If its a SystemRoute, don't cache building the middlewares since
+            # they are constructed for every MatchInfoError as a new handler
+            # is made each time.
+            if not self._has_legacy_middlewares and not isinstance(
+                match_info.route, SystemRoute
+            ):
+                handler = _cached_build_middleware(handler, match_info.apps)
+            else:
+                for app in match_info.apps[::-1]:
+                    for m, new_style in app._middlewares_handlers:  # type: ignore[union-attr]
+                        if new_style:
+                            handler = update_wrapper(
+                                partial(m, handler=handler), handler
+                            )
+                        else:
+                            handler = await m(app, handler)  # type: ignore[arg-type,assignment]
+
+        return await handler(request)
+
+    def __call__(self) -> "Application":
+        """gunicorn compatibility"""
+        return self
+
+    def __repr__(self) -> str:
+        return f"<Application 0x{id(self):x}>"
+
+    def __bool__(self) -> bool:
+        return True
+
+
+class CleanupError(RuntimeError):
+    @property
+    def exceptions(self) -> List[BaseException]:
+        return cast(List[BaseException], self.args[1])
+
+
+if TYPE_CHECKING:
+    _CleanupContextBase = FrozenList[Callable[[Application], AsyncIterator[None]]]
+else:
+    _CleanupContextBase = FrozenList
+
+
+class CleanupContext(_CleanupContextBase):
+    def __init__(self) -> None:
+        super().__init__()
+        self._exits: List[AsyncIterator[None]] = []
+
+    async def _on_startup(self, app: Application) -> None:
+        for cb in self:
+            it = cb(app).__aiter__()
+            await it.__anext__()
+            self._exits.append(it)
+
+    async def _on_cleanup(self, app: Application) -> None:
+        errors = []
+        for it in reversed(self._exits):
+            try:
+                await it.__anext__()
+            except StopAsyncIteration:
+                pass
+            except (Exception, asyncio.CancelledError) as exc:
+                errors.append(exc)
+            else:
+                errors.append(RuntimeError(f"{it!r} has more than one 'yield'"))
+        if errors:
+            if len(errors) == 1:
+                raise errors[0]
+            else:
+                raise CleanupError("Multiple errors on cleanup stage", errors)

backend_service/venv/lib/python3.13/site-packages/aiohttp/web_exceptions.py

@@ -0,0 +1,452 @@
+import warnings
+from typing import Any, Dict, Iterable, List, Optional, Set  # noqa
+
+from yarl import URL
+
+from .typedefs import LooseHeaders, StrOrURL
+from .web_response import Response
+
+__all__ = (
+    "HTTPException",
+    "HTTPError",
+    "HTTPRedirection",
+    "HTTPSuccessful",
+    "HTTPOk",
+    "HTTPCreated",
+    "HTTPAccepted",
+    "HTTPNonAuthoritativeInformation",
+    "HTTPNoContent",
+    "HTTPResetContent",
+    "HTTPPartialContent",
+    "HTTPMove",
+    "HTTPMultipleChoices",
+    "HTTPMovedPermanently",
+    "HTTPFound",
+    "HTTPSeeOther",
+    "HTTPNotModified",
+    "HTTPUseProxy",
+    "HTTPTemporaryRedirect",
+    "HTTPPermanentRedirect",
+    "HTTPClientError",
+    "HTTPBadRequest",
+    "HTTPUnauthorized",
+    "HTTPPaymentRequired",
+    "HTTPForbidden",
+    "HTTPNotFound",
+    "HTTPMethodNotAllowed",
+    "HTTPNotAcceptable",
+    "HTTPProxyAuthenticationRequired",
+    "HTTPRequestTimeout",
+    "HTTPConflict",
+    "HTTPGone",
+    "HTTPLengthRequired",
+    "HTTPPreconditionFailed",
+    "HTTPRequestEntityTooLarge",
+    "HTTPRequestURITooLong",
+    "HTTPUnsupportedMediaType",
+    "HTTPRequestRangeNotSatisfiable",
+    "HTTPExpectationFailed",
+    "HTTPMisdirectedRequest",
+    "HTTPUnprocessableEntity",
+    "HTTPFailedDependency",
+    "HTTPUpgradeRequired",
+    "HTTPPreconditionRequired",
+    "HTTPTooManyRequests",
+    "HTTPRequestHeaderFieldsTooLarge",
+    "HTTPUnavailableForLegalReasons",
+    "HTTPServerError",
+    "HTTPInternalServerError",
+    "HTTPNotImplemented",
+    "HTTPBadGateway",
+    "HTTPServiceUnavailable",
+    "HTTPGatewayTimeout",
+    "HTTPVersionNotSupported",
+    "HTTPVariantAlsoNegotiates",
+    "HTTPInsufficientStorage",
+    "HTTPNotExtended",
+    "HTTPNetworkAuthenticationRequired",
+)
+
+
+class NotAppKeyWarning(UserWarning):
+    """Warning when not using AppKey in Application."""
+
+
+############################################################
+# HTTP Exceptions
+############################################################
+
+
+class HTTPException(Response, Exception):
+
+    # You should set in subclasses:
+    # status = 200
+
+    status_code = -1
+    empty_body = False
+
+    __http_exception__ = True
+
+    def __init__(
+        self,
+        *,
+        headers: Optional[LooseHeaders] = None,
+        reason: Optional[str] = None,
+        body: Any = None,
+        text: Optional[str] = None,
+        content_type: Optional[str] = None,
+    ) -> None:
+        if body is not None:
+            warnings.warn(
+                "body argument is deprecated for http web exceptions",
+                DeprecationWarning,
+            )
+        Response.__init__(
+            self,
+            status=self.status_code,
+            headers=headers,
+            reason=reason,
+            body=body,
+            text=text,
+            content_type=content_type,
+        )
+        Exception.__init__(self, self.reason)
+        if self.body is None and not self.empty_body:
+            self.text = f"{self.status}: {self.reason}"
+
+    def __bool__(self) -> bool:
+        return True
+
+
+class HTTPError(HTTPException):
+    """Base class for exceptions with status codes in the 400s and 500s."""
+
+
+class HTTPRedirection(HTTPException):
+    """Base class for exceptions with status codes in the 300s."""
+
+
+class HTTPSuccessful(HTTPException):
+    """Base class for exceptions with status codes in the 200s."""
+
+
+class HTTPOk(HTTPSuccessful):
+    status_code = 200
+
+
+class HTTPCreated(HTTPSuccessful):
+    status_code = 201
+
+
+class HTTPAccepted(HTTPSuccessful):
+    status_code = 202
+
+
+class HTTPNonAuthoritativeInformation(HTTPSuccessful):
+    status_code = 203
+
+
+class HTTPNoContent(HTTPSuccessful):
+    status_code = 204
+    empty_body = True
+
+
+class HTTPResetContent(HTTPSuccessful):
+    status_code = 205
+    empty_body = True
+
+
+class HTTPPartialContent(HTTPSuccessful):
+    status_code = 206
+
+
+############################################################
+# 3xx redirection
+############################################################
+
+
+class HTTPMove(HTTPRedirection):
+    def __init__(
+        self,
+        location: StrOrURL,
+        *,
+        headers: Optional[LooseHeaders] = None,
+        reason: Optional[str] = None,
+        body: Any = None,
+        text: Optional[str] = None,
+        content_type: Optional[str] = None,
+    ) -> None:
+        if not location:
+            raise ValueError("HTTP redirects need a location to redirect to.")
+        super().__init__(
+            headers=headers,
+            reason=reason,
+            body=body,
+            text=text,
+            content_type=content_type,
+        )
+        self.headers["Location"] = str(URL(location))
+        self.location = location
+
+
+class HTTPMultipleChoices(HTTPMove):
+    status_code = 300
+
+
+class HTTPMovedPermanently(HTTPMove):
+    status_code = 301
+
+
+class HTTPFound(HTTPMove):
+    status_code = 302
+
+
+# This one is safe after a POST (the redirected location will be
+# retrieved with GET):
+class HTTPSeeOther(HTTPMove):
+    status_code = 303
+
+
+class HTTPNotModified(HTTPRedirection):
+    # FIXME: this should include a date or etag header
+    status_code = 304
+    empty_body = True
+
+
+class HTTPUseProxy(HTTPMove):
+    # Not a move, but looks a little like one
+    status_code = 305
+
+
+class HTTPTemporaryRedirect(HTTPMove):
+    status_code = 307
+
+
+class HTTPPermanentRedirect(HTTPMove):
+    status_code = 308
+
+
+############################################################
+# 4xx client error
+############################################################
+
+
+class HTTPClientError(HTTPError):
+    pass
+
+
+class HTTPBadRequest(HTTPClientError):
+    status_code = 400
+
+
+class HTTPUnauthorized(HTTPClientError):
+    status_code = 401
+
+
+class HTTPPaymentRequired(HTTPClientError):
+    status_code = 402
+
+
+class HTTPForbidden(HTTPClientError):
+    status_code = 403
+
+
+class HTTPNotFound(HTTPClientError):
+    status_code = 404
+
+
+class HTTPMethodNotAllowed(HTTPClientError):
+    status_code = 405
+
+    def __init__(
+        self,
+        method: str,
+        allowed_methods: Iterable[str],
+        *,
+        headers: Optional[LooseHeaders] = None,
+        reason: Optional[str] = None,
+        body: Any = None,
+        text: Optional[str] = None,
+        content_type: Optional[str] = None,
+    ) -> None:
+        allow = ",".join(sorted(allowed_methods))
+        super().__init__(
+            headers=headers,
+            reason=reason,
+            body=body,
+            text=text,
+            content_type=content_type,
+        )
+        self.headers["Allow"] = allow
+        self.allowed_methods: Set[str] = set(allowed_methods)
+        self.method = method.upper()
+
+
+class HTTPNotAcceptable(HTTPClientError):
+    status_code = 406
+
+
+class HTTPProxyAuthenticationRequired(HTTPClientError):
+    status_code = 407
+
+
+class HTTPRequestTimeout(HTTPClientError):
+    status_code = 408
+
+
+class HTTPConflict(HTTPClientError):
+    status_code = 409
+
+
+class HTTPGone(HTTPClientError):
+    status_code = 410
+
+
+class HTTPLengthRequired(HTTPClientError):
+    status_code = 411
+
+
+class HTTPPreconditionFailed(HTTPClientError):
+    status_code = 412
+
+
+class HTTPRequestEntityTooLarge(HTTPClientError):
+    status_code = 413
+
+    def __init__(self, max_size: float, actual_size: float, **kwargs: Any) -> None:
+        kwargs.setdefault(
+            "text",
+            "Maximum request body size {} exceeded, "
+            "actual body size {}".format(max_size, actual_size),
+        )
+        super().__init__(**kwargs)
+
+
+class HTTPRequestURITooLong(HTTPClientError):
+    status_code = 414
+
+
+class HTTPUnsupportedMediaType(HTTPClientError):
+    status_code = 415
+
+
+class HTTPRequestRangeNotSatisfiable(HTTPClientError):
+    status_code = 416
+
+
+class HTTPExpectationFailed(HTTPClientError):
+    status_code = 417
+
+
+class HTTPMisdirectedRequest(HTTPClientError):
+    status_code = 421
+
+
+class HTTPUnprocessableEntity(HTTPClientError):
+    status_code = 422
+
+
+class HTTPFailedDependency(HTTPClientError):
+    status_code = 424
+
+
+class HTTPUpgradeRequired(HTTPClientError):
+    status_code = 426
+
+
+class HTTPPreconditionRequired(HTTPClientError):
+    status_code = 428
+
+
+class HTTPTooManyRequests(HTTPClientError):
+    status_code = 429
+
+
+class HTTPRequestHeaderFieldsTooLarge(HTTPClientError):
+    status_code = 431
+
+
+class HTTPUnavailableForLegalReasons(HTTPClientError):
+    status_code = 451
+
+    def __init__(
+        self,
+        link: Optional[StrOrURL],
+        *,
+        headers: Optional[LooseHeaders] = None,
+        reason: Optional[str] = None,
+        body: Any = None,
+        text: Optional[str] = None,
+        content_type: Optional[str] = None,
+    ) -> None:
+        super().__init__(
+            headers=headers,
+            reason=reason,
+            body=body,
+            text=text,
+            content_type=content_type,
+        )
+        self._link = None
+        if link:
+            self._link = URL(link)
+            self.headers["Link"] = f'<{str(self._link)}>; rel="blocked-by"'
+
+    @property
+    def link(self) -> Optional[URL]:
+        return self._link
+
+
+############################################################
+# 5xx Server Error
+############################################################
+#  Response status codes beginning with the digit "5" indicate cases in
+#  which the server is aware that it has erred or is incapable of
+#  performing the request. Except when responding to a HEAD request, the
+#  server SHOULD include an entity containing an explanation of the error
+#  situation, and whether it is a temporary or permanent condition. User
+#  agents SHOULD display any included entity to the user. These response
+#  codes are applicable to any request method.
+
+
+class HTTPServerError(HTTPError):
+    pass
+
+
+class HTTPInternalServerError(HTTPServerError):
+    status_code = 500
+
+
+class HTTPNotImplemented(HTTPServerError):
+    status_code = 501
+
+
+class HTTPBadGateway(HTTPServerError):
+    status_code = 502
+
+
+class HTTPServiceUnavailable(HTTPServerError):
+    status_code = 503
+
+
+class HTTPGatewayTimeout(HTTPServerError):
+    status_code = 504
+
+
+class HTTPVersionNotSupported(HTTPServerError):
+    status_code = 505
+
+
+class HTTPVariantAlsoNegotiates(HTTPServerError):
+    status_code = 506
+
+
+class HTTPInsufficientStorage(HTTPServerError):
+    status_code = 507
+
+
+class HTTPNotExtended(HTTPServerError):
+    status_code = 510
+
+
+class HTTPNetworkAuthenticationRequired(HTTPServerError):
+    status_code = 511