Update 2025-04-24_11:44:19
This commit is contained in:
oib
356
venv/lib/python3.11/site-packages/urllib3/http2/connection.py
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356
venv/lib/python3.11/site-packages/urllib3/http2/connection.py
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from __future__ import annotations
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import logging
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import re
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import threading
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import types
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import typing
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import h2.config # type: ignore[import-untyped]
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import h2.connection # type: ignore[import-untyped]
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import h2.events # type: ignore[import-untyped]
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from .._base_connection import _TYPE_BODY
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from .._collections import HTTPHeaderDict
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from ..connection import HTTPSConnection, _get_default_user_agent
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from ..exceptions import ConnectionError
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from ..response import BaseHTTPResponse
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orig_HTTPSConnection = HTTPSConnection
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T = typing.TypeVar("T")
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log = logging.getLogger(__name__)
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RE_IS_LEGAL_HEADER_NAME = re.compile(rb"^[!#$%&'*+\-.^_`|~0-9a-z]+$")
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RE_IS_ILLEGAL_HEADER_VALUE = re.compile(rb"[\0\x00\x0a\x0d\r\n]|^[ \r\n\t]|[ \r\n\t]$")
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def _is_legal_header_name(name: bytes) -> bool:
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"""
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"An implementation that validates fields according to the definitions in Sections
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5.1 and 5.5 of [HTTP] only needs an additional check that field names do not
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include uppercase characters." (https://httpwg.org/specs/rfc9113.html#n-field-validity)
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`http.client._is_legal_header_name` does not validate the field name according to the
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HTTP 1.1 spec, so we do that here, in addition to checking for uppercase characters.
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This does not allow for the `:` character in the header name, so should not
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be used to validate pseudo-headers.
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"""
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return bool(RE_IS_LEGAL_HEADER_NAME.match(name))
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def _is_illegal_header_value(value: bytes) -> bool:
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"""
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"A field value MUST NOT contain the zero value (ASCII NUL, 0x00), line feed
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(ASCII LF, 0x0a), or carriage return (ASCII CR, 0x0d) at any position. A field
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value MUST NOT start or end with an ASCII whitespace character (ASCII SP or HTAB,
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0x20 or 0x09)." (https://httpwg.org/specs/rfc9113.html#n-field-validity)
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"""
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return bool(RE_IS_ILLEGAL_HEADER_VALUE.search(value))
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class _LockedObject(typing.Generic[T]):
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"""
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A wrapper class that hides a specific object behind a lock.
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The goal here is to provide a simple way to protect access to an object
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that cannot safely be simultaneously accessed from multiple threads. The
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intended use of this class is simple: take hold of it with a context
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manager, which returns the protected object.
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"""
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__slots__ = (
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"lock",
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"_obj",
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)
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def __init__(self, obj: T):
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self.lock = threading.RLock()
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self._obj = obj
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def __enter__(self) -> T:
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self.lock.acquire()
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return self._obj
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def __exit__(
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self,
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exc_type: type[BaseException] | None,
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exc_val: BaseException | None,
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exc_tb: types.TracebackType | None,
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) -> None:
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self.lock.release()
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class HTTP2Connection(HTTPSConnection):
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def __init__(
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self, host: str, port: int | None = None, **kwargs: typing.Any
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) -> None:
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self._h2_conn = self._new_h2_conn()
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self._h2_stream: int | None = None
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self._headers: list[tuple[bytes, bytes]] = []
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if "proxy" in kwargs or "proxy_config" in kwargs: # Defensive:
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raise NotImplementedError("Proxies aren't supported with HTTP/2")
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super().__init__(host, port, **kwargs)
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if self._tunnel_host is not None:
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raise NotImplementedError("Tunneling isn't supported with HTTP/2")
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def _new_h2_conn(self) -> _LockedObject[h2.connection.H2Connection]:
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config = h2.config.H2Configuration(client_side=True)
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return _LockedObject(h2.connection.H2Connection(config=config))
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def connect(self) -> None:
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super().connect()
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with self._h2_conn as conn:
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conn.initiate_connection()
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if data_to_send := conn.data_to_send():
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self.sock.sendall(data_to_send)
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def putrequest( # type: ignore[override]
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self,
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method: str,
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url: str,
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**kwargs: typing.Any,
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) -> None:
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"""putrequest
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This deviates from the HTTPConnection method signature since we never need to override
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sending accept-encoding headers or the host header.
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"""
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if "skip_host" in kwargs:
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raise NotImplementedError("`skip_host` isn't supported")
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if "skip_accept_encoding" in kwargs:
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raise NotImplementedError("`skip_accept_encoding` isn't supported")
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self._request_url = url or "/"
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self._validate_path(url) # type: ignore[attr-defined]
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if ":" in self.host:
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authority = f"[{self.host}]:{self.port or 443}"
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else:
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authority = f"{self.host}:{self.port or 443}"
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self._headers.append((b":scheme", b"https"))
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self._headers.append((b":method", method.encode()))
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self._headers.append((b":authority", authority.encode()))
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self._headers.append((b":path", url.encode()))
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with self._h2_conn as conn:
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self._h2_stream = conn.get_next_available_stream_id()
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def putheader(self, header: str | bytes, *values: str | bytes) -> None: # type: ignore[override]
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# TODO SKIPPABLE_HEADERS from urllib3 are ignored.
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header = header.encode() if isinstance(header, str) else header
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header = header.lower() # A lot of upstream code uses capitalized headers.
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if not _is_legal_header_name(header):
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raise ValueError(f"Illegal header name {str(header)}")
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for value in values:
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value = value.encode() if isinstance(value, str) else value
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if _is_illegal_header_value(value):
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raise ValueError(f"Illegal header value {str(value)}")
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self._headers.append((header, value))
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def endheaders(self, message_body: typing.Any = None) -> None: # type: ignore[override]
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if self._h2_stream is None:
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raise ConnectionError("Must call `putrequest` first.")
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with self._h2_conn as conn:
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conn.send_headers(
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stream_id=self._h2_stream,
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headers=self._headers,
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end_stream=(message_body is None),
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)
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if data_to_send := conn.data_to_send():
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self.sock.sendall(data_to_send)
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self._headers = [] # Reset headers for the next request.
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def send(self, data: typing.Any) -> None:
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"""Send data to the server.
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`data` can be: `str`, `bytes`, an iterable, or file-like objects
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that support a .read() method.
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"""
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if self._h2_stream is None:
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raise ConnectionError("Must call `putrequest` first.")
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with self._h2_conn as conn:
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if data_to_send := conn.data_to_send():
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self.sock.sendall(data_to_send)
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if hasattr(data, "read"): # file-like objects
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while True:
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chunk = data.read(self.blocksize)
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if not chunk:
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break
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if isinstance(chunk, str):
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chunk = chunk.encode() # pragma: no cover
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conn.send_data(self._h2_stream, chunk, end_stream=False)
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if data_to_send := conn.data_to_send():
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self.sock.sendall(data_to_send)
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conn.end_stream(self._h2_stream)
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return
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if isinstance(data, str): # str -> bytes
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data = data.encode()
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try:
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if isinstance(data, bytes):
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conn.send_data(self._h2_stream, data, end_stream=True)
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if data_to_send := conn.data_to_send():
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self.sock.sendall(data_to_send)
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else:
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for chunk in data:
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conn.send_data(self._h2_stream, chunk, end_stream=False)
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if data_to_send := conn.data_to_send():
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self.sock.sendall(data_to_send)
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conn.end_stream(self._h2_stream)
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except TypeError:
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raise TypeError(
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"`data` should be str, bytes, iterable, or file. got %r"
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% type(data)
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)
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def set_tunnel(
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self,
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host: str,
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port: int | None = None,
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headers: typing.Mapping[str, str] | None = None,
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scheme: str = "http",
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) -> None:
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raise NotImplementedError(
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"HTTP/2 does not support setting up a tunnel through a proxy"
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)
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def getresponse( # type: ignore[override]
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self,
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) -> HTTP2Response:
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status = None
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data = bytearray()
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with self._h2_conn as conn:
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end_stream = False
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while not end_stream:
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# TODO: Arbitrary read value.
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if received_data := self.sock.recv(65535):
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events = conn.receive_data(received_data)
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for event in events:
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if isinstance(event, h2.events.ResponseReceived):
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headers = HTTPHeaderDict()
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for header, value in event.headers:
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if header == b":status":
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status = int(value.decode())
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else:
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headers.add(
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header.decode("ascii"), value.decode("ascii")
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)
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elif isinstance(event, h2.events.DataReceived):
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data += event.data
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conn.acknowledge_received_data(
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event.flow_controlled_length, event.stream_id
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)
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elif isinstance(event, h2.events.StreamEnded):
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end_stream = True
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if data_to_send := conn.data_to_send():
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self.sock.sendall(data_to_send)
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assert status is not None
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return HTTP2Response(
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status=status,
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headers=headers,
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request_url=self._request_url,
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data=bytes(data),
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)
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def request( # type: ignore[override]
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self,
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method: str,
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url: str,
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body: _TYPE_BODY | None = None,
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headers: typing.Mapping[str, str] | None = None,
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*,
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preload_content: bool = True,
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decode_content: bool = True,
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enforce_content_length: bool = True,
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**kwargs: typing.Any,
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) -> None:
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"""Send an HTTP/2 request"""
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if "chunked" in kwargs:
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# TODO this is often present from upstream.
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# raise NotImplementedError("`chunked` isn't supported with HTTP/2")
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pass
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if self.sock is not None:
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self.sock.settimeout(self.timeout)
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self.putrequest(method, url)
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headers = headers or {}
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for k, v in headers.items():
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if k.lower() == "transfer-encoding" and v == "chunked":
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continue
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else:
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self.putheader(k, v)
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if b"user-agent" not in dict(self._headers):
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self.putheader(b"user-agent", _get_default_user_agent())
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if body:
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self.endheaders(message_body=body)
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self.send(body)
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else:
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self.endheaders()
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def close(self) -> None:
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with self._h2_conn as conn:
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try:
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conn.close_connection()
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if data := conn.data_to_send():
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self.sock.sendall(data)
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except Exception:
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pass
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# Reset all our HTTP/2 connection state.
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self._h2_conn = self._new_h2_conn()
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self._h2_stream = None
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self._headers = []
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super().close()
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class HTTP2Response(BaseHTTPResponse):
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# TODO: This is a woefully incomplete response object, but works for non-streaming.
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def __init__(
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self,
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status: int,
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headers: HTTPHeaderDict,
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request_url: str,
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data: bytes,
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decode_content: bool = False, # TODO: support decoding
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) -> None:
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super().__init__(
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status=status,
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headers=headers,
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# Following CPython, we map HTTP versions to major * 10 + minor integers
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version=20,
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version_string="HTTP/2",
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# No reason phrase in HTTP/2
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reason=None,
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decode_content=decode_content,
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request_url=request_url,
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)
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self._data = data
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self.length_remaining = 0
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@property
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def data(self) -> bytes:
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return self._data
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def get_redirect_location(self) -> None:
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return None
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def close(self) -> None:
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pass
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