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Diffstat (limited to 'venv/lib/python3.11/site-packages/httpcore')
63 files changed, 7032 insertions, 0 deletions
diff --git a/venv/lib/python3.11/site-packages/httpcore/__init__.py b/venv/lib/python3.11/site-packages/httpcore/__init__.py new file mode 100644 index 0000000..014213b --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/__init__.py @@ -0,0 +1,139 @@ +from ._api import request, stream +from ._async import ( + AsyncConnectionInterface, + AsyncConnectionPool, + AsyncHTTP2Connection, + AsyncHTTP11Connection, + AsyncHTTPConnection, + AsyncHTTPProxy, + AsyncSOCKSProxy, +) +from ._backends.base import ( + SOCKET_OPTION, + AsyncNetworkBackend, + AsyncNetworkStream, + NetworkBackend, + NetworkStream, +) +from ._backends.mock import AsyncMockBackend, AsyncMockStream, MockBackend, MockStream +from ._backends.sync import SyncBackend +from ._exceptions import ( + ConnectError, + ConnectionNotAvailable, + ConnectTimeout, + LocalProtocolError, + NetworkError, + PoolTimeout, + ProtocolError, + ProxyError, + ReadError, + ReadTimeout, + RemoteProtocolError, + TimeoutException, + UnsupportedProtocol, + WriteError, + WriteTimeout, +) +from ._models import URL, Origin, Request, Response +from ._ssl import default_ssl_context +from ._sync import ( + ConnectionInterface, + ConnectionPool, + HTTP2Connection, + HTTP11Connection, + HTTPConnection, + HTTPProxy, + SOCKSProxy, +) + +# The 'httpcore.AnyIOBackend' class is conditional on 'anyio' being installed. +try: + from ._backends.anyio import AnyIOBackend +except ImportError: # pragma: nocover + + class AnyIOBackend: # type: ignore + def __init__(self, *args, **kwargs): # type: ignore + msg = ( + "Attempted to use 'httpcore.AnyIOBackend' but 'anyio' is not installed." + ) + raise RuntimeError(msg) + + +# The 'httpcore.TrioBackend' class is conditional on 'trio' being installed. +try: + from ._backends.trio import TrioBackend +except ImportError: # pragma: nocover + + class TrioBackend: # type: ignore + def __init__(self, *args, **kwargs): # type: ignore + msg = "Attempted to use 'httpcore.TrioBackend' but 'trio' is not installed." + raise RuntimeError(msg) + + +__all__ = [ + # top-level requests + "request", + "stream", + # models + "Origin", + "URL", + "Request", + "Response", + # async + "AsyncHTTPConnection", + "AsyncConnectionPool", + "AsyncHTTPProxy", + "AsyncHTTP11Connection", + "AsyncHTTP2Connection", + "AsyncConnectionInterface", + "AsyncSOCKSProxy", + # sync + "HTTPConnection", + "ConnectionPool", + "HTTPProxy", + "HTTP11Connection", + "HTTP2Connection", + "ConnectionInterface", + "SOCKSProxy", + # network backends, implementations + "SyncBackend", + "AnyIOBackend", + "TrioBackend", + # network backends, mock implementations + "AsyncMockBackend", + "AsyncMockStream", + "MockBackend", + "MockStream", + # network backends, interface + "AsyncNetworkStream", + "AsyncNetworkBackend", + "NetworkStream", + "NetworkBackend", + # util + "default_ssl_context", + "SOCKET_OPTION", + # exceptions + "ConnectionNotAvailable", + "ProxyError", + "ProtocolError", + "LocalProtocolError", + "RemoteProtocolError", + "UnsupportedProtocol", + "TimeoutException", + "PoolTimeout", + "ConnectTimeout", + "ReadTimeout", + "WriteTimeout", + "NetworkError", + "ConnectError", + "ReadError", + "WriteError", +] + +__version__ = "1.0.5" + + +__locals = locals() +for __name in __all__: + if not __name.startswith("__"): + setattr(__locals[__name], "__module__", "httpcore") # noqa diff --git a/venv/lib/python3.11/site-packages/httpcore/__pycache__/__init__.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/__pycache__/__init__.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..85ee228 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/__pycache__/__init__.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/__pycache__/_api.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_api.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..203422c --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_api.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/__pycache__/_exceptions.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_exceptions.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..9a4ce54 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_exceptions.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/__pycache__/_models.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_models.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..677230b --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_models.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/__pycache__/_ssl.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_ssl.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..60cc75a --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_ssl.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/__pycache__/_synchronization.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_synchronization.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..05f3841 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_synchronization.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/__pycache__/_trace.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_trace.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..eaf4a5a --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_trace.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/__pycache__/_utils.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_utils.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..e34097a --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/__pycache__/_utils.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_api.py b/venv/lib/python3.11/site-packages/httpcore/_api.py new file mode 100644 index 0000000..854235f --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_api.py @@ -0,0 +1,92 @@ +from contextlib import contextmanager +from typing import Iterator, Optional, Union + +from ._models import URL, Extensions, HeaderTypes, Response +from ._sync.connection_pool import ConnectionPool + + +def request( + method: Union[bytes, str], + url: Union[URL, bytes, str], + *, + headers: HeaderTypes = None, + content: Union[bytes, Iterator[bytes], None] = None, + extensions: Optional[Extensions] = None, +) -> Response: + """ + Sends an HTTP request, returning the response. + + ``` + response = httpcore.request("GET", "https://www.example.com/") + ``` + + Arguments: + method: The HTTP method for the request. Typically one of `"GET"`, + `"OPTIONS"`, `"HEAD"`, `"POST"`, `"PUT"`, `"PATCH"`, or `"DELETE"`. + url: The URL of the HTTP request. Either as an instance of `httpcore.URL`, + or as str/bytes. + headers: The HTTP request headers. Either as a dictionary of str/bytes, + or as a list of two-tuples of str/bytes. + content: The content of the request body. Either as bytes, + or as a bytes iterator. + extensions: A dictionary of optional extra information included on the request. + Possible keys include `"timeout"`. + + Returns: + An instance of `httpcore.Response`. + """ + with ConnectionPool() as pool: + return pool.request( + method=method, + url=url, + headers=headers, + content=content, + extensions=extensions, + ) + + +@contextmanager +def stream( + method: Union[bytes, str], + url: Union[URL, bytes, str], + *, + headers: HeaderTypes = None, + content: Union[bytes, Iterator[bytes], None] = None, + extensions: Optional[Extensions] = None, +) -> Iterator[Response]: + """ + Sends an HTTP request, returning the response within a content manager. + + ``` + with httpcore.stream("GET", "https://www.example.com/") as response: + ... + ``` + + When using the `stream()` function, the body of the response will not be + automatically read. If you want to access the response body you should + either use `content = response.read()`, or `for chunk in response.iter_content()`. + + Arguments: + method: The HTTP method for the request. Typically one of `"GET"`, + `"OPTIONS"`, `"HEAD"`, `"POST"`, `"PUT"`, `"PATCH"`, or `"DELETE"`. + url: The URL of the HTTP request. Either as an instance of `httpcore.URL`, + or as str/bytes. + headers: The HTTP request headers. Either as a dictionary of str/bytes, + or as a list of two-tuples of str/bytes. + content: The content of the request body. Either as bytes, + or as a bytes iterator. + extensions: A dictionary of optional extra information included on the request. + Possible keys include `"timeout"`. + + Returns: + An instance of `httpcore.Response`. + """ + with ConnectionPool() as pool: + with pool.stream( + method=method, + url=url, + headers=headers, + content=content, + extensions=extensions, + ) as response: + yield response diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/__init__.py b/venv/lib/python3.11/site-packages/httpcore/_async/__init__.py new file mode 100644 index 0000000..88dc7f0 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/__init__.py @@ -0,0 +1,39 @@ +from .connection import AsyncHTTPConnection +from .connection_pool import AsyncConnectionPool +from .http11 import AsyncHTTP11Connection +from .http_proxy import AsyncHTTPProxy +from .interfaces import AsyncConnectionInterface + +try: + from .http2 import AsyncHTTP2Connection +except ImportError: # pragma: nocover + + class AsyncHTTP2Connection: # type: ignore + def __init__(self, *args, **kwargs) -> None: # type: ignore + raise RuntimeError( + "Attempted to use http2 support, but the `h2` package is not " + "installed. Use 'pip install httpcore[http2]'." + ) + + +try: + from .socks_proxy import AsyncSOCKSProxy +except ImportError: # pragma: nocover + + class AsyncSOCKSProxy: # type: ignore + def __init__(self, *args, **kwargs) -> None: # type: ignore + raise RuntimeError( + "Attempted to use SOCKS support, but the `socksio` package is not " + "installed. Use 'pip install httpcore[socks]'." + ) + + +__all__ = [ + "AsyncHTTPConnection", + "AsyncConnectionPool", + "AsyncHTTPProxy", + "AsyncHTTP11Connection", + "AsyncHTTP2Connection", + "AsyncConnectionInterface", + "AsyncSOCKSProxy", +] diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/__init__.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/__init__.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..ceec66a --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/__init__.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/connection.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/connection.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..dcc379d --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/connection.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/connection_pool.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/connection_pool.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..0334b40 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/connection_pool.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/http11.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/http11.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..cbfc2a1 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/http11.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/http2.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/http2.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..351b3cc --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/http2.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/http_proxy.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/http_proxy.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..cff4334 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/http_proxy.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/interfaces.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/interfaces.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..1e040d3 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/interfaces.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/socks_proxy.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/socks_proxy.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..9c2a147 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/__pycache__/socks_proxy.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/connection.py b/venv/lib/python3.11/site-packages/httpcore/_async/connection.py new file mode 100644 index 0000000..2f439cf --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/connection.py @@ -0,0 +1,220 @@ +import itertools +import logging +import ssl +from types import TracebackType +from typing import Iterable, Iterator, Optional, Type + +from .._backends.auto import AutoBackend +from .._backends.base import SOCKET_OPTION, AsyncNetworkBackend, AsyncNetworkStream +from .._exceptions import ConnectError, ConnectTimeout +from .._models import Origin, Request, Response +from .._ssl import default_ssl_context +from .._synchronization import AsyncLock +from .._trace import Trace +from .http11 import AsyncHTTP11Connection +from .interfaces import AsyncConnectionInterface + +RETRIES_BACKOFF_FACTOR = 0.5 # 0s, 0.5s, 1s, 2s, 4s, etc. + + +logger = logging.getLogger("httpcore.connection") + + +def exponential_backoff(factor: float) -> Iterator[float]: + """ + Generate a geometric sequence that has a ratio of 2 and starts with 0. + + For example: + - `factor = 2`: `0, 2, 4, 8, 16, 32, 64, ...` + - `factor = 3`: `0, 3, 6, 12, 24, 48, 96, ...` + """ + yield 0 + for n in itertools.count(): + yield factor * 2**n + + +class AsyncHTTPConnection(AsyncConnectionInterface): + def __init__( + self, + origin: Origin, + ssl_context: Optional[ssl.SSLContext] = None, + keepalive_expiry: Optional[float] = None, + http1: bool = True, + http2: bool = False, + retries: int = 0, + local_address: Optional[str] = None, + uds: Optional[str] = None, + network_backend: Optional[AsyncNetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + ) -> None: + self._origin = origin + self._ssl_context = ssl_context + self._keepalive_expiry = keepalive_expiry + self._http1 = http1 + self._http2 = http2 + self._retries = retries + self._local_address = local_address + self._uds = uds + + self._network_backend: AsyncNetworkBackend = ( + AutoBackend() if network_backend is None else network_backend + ) + self._connection: Optional[AsyncConnectionInterface] = None + self._connect_failed: bool = False + self._request_lock = AsyncLock() + self._socket_options = socket_options + + async def handle_async_request(self, request: Request) -> Response: + if not self.can_handle_request(request.url.origin): + raise RuntimeError( + f"Attempted to send request to {request.url.origin} on connection to {self._origin}" + ) + + try: + async with self._request_lock: + if self._connection is None: + stream = await self._connect(request) + + ssl_object = stream.get_extra_info("ssl_object") + http2_negotiated = ( + ssl_object is not None + and ssl_object.selected_alpn_protocol() == "h2" + ) + if http2_negotiated or (self._http2 and not self._http1): + from .http2 import AsyncHTTP2Connection + + self._connection = AsyncHTTP2Connection( + origin=self._origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + else: + self._connection = AsyncHTTP11Connection( + origin=self._origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + except BaseException as exc: + self._connect_failed = True + raise exc + + return await self._connection.handle_async_request(request) + + async def _connect(self, request: Request) -> AsyncNetworkStream: + timeouts = request.extensions.get("timeout", {}) + sni_hostname = request.extensions.get("sni_hostname", None) + timeout = timeouts.get("connect", None) + + retries_left = self._retries + delays = exponential_backoff(factor=RETRIES_BACKOFF_FACTOR) + + while True: + try: + if self._uds is None: + kwargs = { + "host": self._origin.host.decode("ascii"), + "port": self._origin.port, + "local_address": self._local_address, + "timeout": timeout, + "socket_options": self._socket_options, + } + async with Trace("connect_tcp", logger, request, kwargs) as trace: + stream = await self._network_backend.connect_tcp(**kwargs) + trace.return_value = stream + else: + kwargs = { + "path": self._uds, + "timeout": timeout, + "socket_options": self._socket_options, + } + async with Trace( + "connect_unix_socket", logger, request, kwargs + ) as trace: + stream = await self._network_backend.connect_unix_socket( + **kwargs + ) + trace.return_value = stream + + if self._origin.scheme in (b"https", b"wss"): + ssl_context = ( + default_ssl_context() + if self._ssl_context is None + else self._ssl_context + ) + alpn_protocols = ["http/1.1", "h2"] if self._http2 else ["http/1.1"] + ssl_context.set_alpn_protocols(alpn_protocols) + + kwargs = { + "ssl_context": ssl_context, + "server_hostname": sni_hostname + or self._origin.host.decode("ascii"), + "timeout": timeout, + } + async with Trace("start_tls", logger, request, kwargs) as trace: + stream = await stream.start_tls(**kwargs) + trace.return_value = stream + return stream + except (ConnectError, ConnectTimeout): + if retries_left <= 0: + raise + retries_left -= 1 + delay = next(delays) + async with Trace("retry", logger, request, kwargs) as trace: + await self._network_backend.sleep(delay) + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._origin + + async def aclose(self) -> None: + if self._connection is not None: + async with Trace("close", logger, None, {}): + await self._connection.aclose() + + def is_available(self) -> bool: + if self._connection is None: + # If HTTP/2 support is enabled, and the resulting connection could + # end up as HTTP/2 then we should indicate the connection as being + # available to service multiple requests. + return ( + self._http2 + and (self._origin.scheme == b"https" or not self._http1) + and not self._connect_failed + ) + return self._connection.is_available() + + def has_expired(self) -> bool: + if self._connection is None: + return self._connect_failed + return self._connection.has_expired() + + def is_idle(self) -> bool: + if self._connection is None: + return self._connect_failed + return self._connection.is_idle() + + def is_closed(self) -> bool: + if self._connection is None: + return self._connect_failed + return self._connection.is_closed() + + def info(self) -> str: + if self._connection is None: + return "CONNECTION FAILED" if self._connect_failed else "CONNECTING" + return self._connection.info() + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.info()}]>" + + # These context managers are not used in the standard flow, but are + # useful for testing or working with connection instances directly. + + async def __aenter__(self) -> "AsyncHTTPConnection": + return self + + async def __aexit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + await self.aclose() diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/connection_pool.py b/venv/lib/python3.11/site-packages/httpcore/_async/connection_pool.py new file mode 100644 index 0000000..018b0ba --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/connection_pool.py @@ -0,0 +1,380 @@ +import ssl +import sys +from types import TracebackType +from typing import AsyncIterable, AsyncIterator, Iterable, List, Optional, Type + +from .._backends.auto import AutoBackend +from .._backends.base import SOCKET_OPTION, AsyncNetworkBackend +from .._exceptions import ConnectionNotAvailable, UnsupportedProtocol +from .._models import Origin, Request, Response +from .._synchronization import AsyncEvent, AsyncShieldCancellation, AsyncThreadLock +from .connection import AsyncHTTPConnection +from .interfaces import AsyncConnectionInterface, AsyncRequestInterface + + +class AsyncPoolRequest: + def __init__(self, request: Request) -> None: + self.request = request + self.connection: Optional[AsyncConnectionInterface] = None + self._connection_acquired = AsyncEvent() + + def assign_to_connection( + self, connection: Optional[AsyncConnectionInterface] + ) -> None: + self.connection = connection + self._connection_acquired.set() + + def clear_connection(self) -> None: + self.connection = None + self._connection_acquired = AsyncEvent() + + async def wait_for_connection( + self, timeout: Optional[float] = None + ) -> AsyncConnectionInterface: + if self.connection is None: + await self._connection_acquired.wait(timeout=timeout) + assert self.connection is not None + return self.connection + + def is_queued(self) -> bool: + return self.connection is None + + +class AsyncConnectionPool(AsyncRequestInterface): + """ + A connection pool for making HTTP requests. + """ + + def __init__( + self, + ssl_context: Optional[ssl.SSLContext] = None, + max_connections: Optional[int] = 10, + max_keepalive_connections: Optional[int] = None, + keepalive_expiry: Optional[float] = None, + http1: bool = True, + http2: bool = False, + retries: int = 0, + local_address: Optional[str] = None, + uds: Optional[str] = None, + network_backend: Optional[AsyncNetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + ) -> None: + """ + A connection pool for making HTTP requests. + + Parameters: + ssl_context: An SSL context to use for verifying connections. + If not specified, the default `httpcore.default_ssl_context()` + will be used. + max_connections: The maximum number of concurrent HTTP connections that + the pool should allow. Any attempt to send a request on a pool that + would exceed this amount will block until a connection is available. + max_keepalive_connections: The maximum number of idle HTTP connections + that will be maintained in the pool. + keepalive_expiry: The duration in seconds that an idle HTTP connection + may be maintained for before being expired from the pool. + http1: A boolean indicating if HTTP/1.1 requests should be supported + by the connection pool. Defaults to True. + http2: A boolean indicating if HTTP/2 requests should be supported by + the connection pool. Defaults to False. + retries: The maximum number of retries when trying to establish a + connection. + local_address: Local address to connect from. Can also be used to connect + using a particular address family. Using `local_address="0.0.0.0"` + will connect using an `AF_INET` address (IPv4), while using + `local_address="::"` will connect using an `AF_INET6` address (IPv6). + uds: Path to a Unix Domain Socket to use instead of TCP sockets. + network_backend: A backend instance to use for handling network I/O. + socket_options: Socket options that have to be included + in the TCP socket when the connection was established. + """ + self._ssl_context = ssl_context + + self._max_connections = ( + sys.maxsize if max_connections is None else max_connections + ) + self._max_keepalive_connections = ( + sys.maxsize + if max_keepalive_connections is None + else max_keepalive_connections + ) + self._max_keepalive_connections = min( + self._max_connections, self._max_keepalive_connections + ) + + self._keepalive_expiry = keepalive_expiry + self._http1 = http1 + self._http2 = http2 + self._retries = retries + self._local_address = local_address + self._uds = uds + + self._network_backend = ( + AutoBackend() if network_backend is None else network_backend + ) + self._socket_options = socket_options + + # The mutable state on a connection pool is the queue of incoming requests, + # and the set of connections that are servicing those requests. + self._connections: List[AsyncConnectionInterface] = [] + self._requests: List[AsyncPoolRequest] = [] + + # We only mutate the state of the connection pool within an 'optional_thread_lock' + # context. This holds a threading lock unless we're running in async mode, + # in which case it is a no-op. + self._optional_thread_lock = AsyncThreadLock() + + def create_connection(self, origin: Origin) -> AsyncConnectionInterface: + return AsyncHTTPConnection( + origin=origin, + ssl_context=self._ssl_context, + keepalive_expiry=self._keepalive_expiry, + http1=self._http1, + http2=self._http2, + retries=self._retries, + local_address=self._local_address, + uds=self._uds, + network_backend=self._network_backend, + socket_options=self._socket_options, + ) + + @property + def connections(self) -> List[AsyncConnectionInterface]: + """ + Return a list of the connections currently in the pool. + + For example: + + ```python + >>> pool.connections + [ + <AsyncHTTPConnection ['https://example.com:443', HTTP/1.1, ACTIVE, Request Count: 6]>, + <AsyncHTTPConnection ['https://example.com:443', HTTP/1.1, IDLE, Request Count: 9]> , + <AsyncHTTPConnection ['http://example.com:80', HTTP/1.1, IDLE, Request Count: 1]>, + ] + ``` + """ + return list(self._connections) + + async def handle_async_request(self, request: Request) -> Response: + """ + Send an HTTP request, and return an HTTP response. + + This is the core implementation that is called into by `.request()` or `.stream()`. + """ + scheme = request.url.scheme.decode() + if scheme == "": + raise UnsupportedProtocol( + "Request URL is missing an 'http://' or 'https://' protocol." + ) + if scheme not in ("http", "https", "ws", "wss"): + raise UnsupportedProtocol( + f"Request URL has an unsupported protocol '{scheme}://'." + ) + + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("pool", None) + + with self._optional_thread_lock: + # Add the incoming request to our request queue. + pool_request = AsyncPoolRequest(request) + self._requests.append(pool_request) + + try: + while True: + with self._optional_thread_lock: + # Assign incoming requests to available connections, + # closing or creating new connections as required. + closing = self._assign_requests_to_connections() + await self._close_connections(closing) + + # Wait until this request has an assigned connection. + connection = await pool_request.wait_for_connection(timeout=timeout) + + try: + # Send the request on the assigned connection. + response = await connection.handle_async_request( + pool_request.request + ) + except ConnectionNotAvailable: + # In some cases a connection may initially be available to + # handle a request, but then become unavailable. + # + # In this case we clear the connection and try again. + pool_request.clear_connection() + else: + break # pragma: nocover + + except BaseException as exc: + with self._optional_thread_lock: + # For any exception or cancellation we remove the request from + # the queue, and then re-assign requests to connections. + self._requests.remove(pool_request) + closing = self._assign_requests_to_connections() + + await self._close_connections(closing) + raise exc from None + + # Return the response. Note that in this case we still have to manage + # the point at which the response is closed. + assert isinstance(response.stream, AsyncIterable) + return Response( + status=response.status, + headers=response.headers, + content=PoolByteStream( + stream=response.stream, pool_request=pool_request, pool=self + ), + extensions=response.extensions, + ) + + def _assign_requests_to_connections(self) -> List[AsyncConnectionInterface]: + """ + Manage the state of the connection pool, assigning incoming + requests to connections as available. + + Called whenever a new request is added or removed from the pool. + + Any closing connections are returned, allowing the I/O for closing + those connections to be handled seperately. + """ + closing_connections = [] + + # First we handle cleaning up any connections that are closed, + # have expired their keep-alive, or surplus idle connections. + for connection in list(self._connections): + if connection.is_closed(): + # log: "removing closed connection" + self._connections.remove(connection) + elif connection.has_expired(): + # log: "closing expired connection" + self._connections.remove(connection) + closing_connections.append(connection) + elif ( + connection.is_idle() + and len([connection.is_idle() for connection in self._connections]) + > self._max_keepalive_connections + ): + # log: "closing idle connection" + self._connections.remove(connection) + closing_connections.append(connection) + + # Assign queued requests to connections. + queued_requests = [request for request in self._requests if request.is_queued()] + for pool_request in queued_requests: + origin = pool_request.request.url.origin + avilable_connections = [ + connection + for connection in self._connections + if connection.can_handle_request(origin) and connection.is_available() + ] + idle_connections = [ + connection for connection in self._connections if connection.is_idle() + ] + + # There are three cases for how we may be able to handle the request: + # + # 1. There is an existing connection that can handle the request. + # 2. We can create a new connection to handle the request. + # 3. We can close an idle connection and then create a new connection + # to handle the request. + if avilable_connections: + # log: "reusing existing connection" + connection = avilable_connections[0] + pool_request.assign_to_connection(connection) + elif len(self._connections) < self._max_connections: + # log: "creating new connection" + connection = self.create_connection(origin) + self._connections.append(connection) + pool_request.assign_to_connection(connection) + elif idle_connections: + # log: "closing idle connection" + connection = idle_connections[0] + self._connections.remove(connection) + closing_connections.append(connection) + # log: "creating new connection" + connection = self.create_connection(origin) + self._connections.append(connection) + pool_request.assign_to_connection(connection) + + return closing_connections + + async def _close_connections(self, closing: List[AsyncConnectionInterface]) -> None: + # Close connections which have been removed from the pool. + with AsyncShieldCancellation(): + for connection in closing: + await connection.aclose() + + async def aclose(self) -> None: + # Explicitly close the connection pool. + # Clears all existing requests and connections. + with self._optional_thread_lock: + closing_connections = list(self._connections) + self._connections = [] + await self._close_connections(closing_connections) + + async def __aenter__(self) -> "AsyncConnectionPool": + return self + + async def __aexit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + await self.aclose() + + def __repr__(self) -> str: + class_name = self.__class__.__name__ + with self._optional_thread_lock: + request_is_queued = [request.is_queued() for request in self._requests] + connection_is_idle = [ + connection.is_idle() for connection in self._connections + ] + + num_active_requests = request_is_queued.count(False) + num_queued_requests = request_is_queued.count(True) + num_active_connections = connection_is_idle.count(False) + num_idle_connections = connection_is_idle.count(True) + + requests_info = ( + f"Requests: {num_active_requests} active, {num_queued_requests} queued" + ) + connection_info = ( + f"Connections: {num_active_connections} active, {num_idle_connections} idle" + ) + + return f"<{class_name} [{requests_info} | {connection_info}]>" + + +class PoolByteStream: + def __init__( + self, + stream: AsyncIterable[bytes], + pool_request: AsyncPoolRequest, + pool: AsyncConnectionPool, + ) -> None: + self._stream = stream + self._pool_request = pool_request + self._pool = pool + self._closed = False + + async def __aiter__(self) -> AsyncIterator[bytes]: + try: + async for part in self._stream: + yield part + except BaseException as exc: + await self.aclose() + raise exc from None + + async def aclose(self) -> None: + if not self._closed: + self._closed = True + with AsyncShieldCancellation(): + if hasattr(self._stream, "aclose"): + await self._stream.aclose() + + with self._pool._optional_thread_lock: + self._pool._requests.remove(self._pool_request) + closing = self._pool._assign_requests_to_connections() + + await self._pool._close_connections(closing) diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/http11.py b/venv/lib/python3.11/site-packages/httpcore/_async/http11.py new file mode 100644 index 0000000..0493a92 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/http11.py @@ -0,0 +1,386 @@ +import enum +import logging +import ssl +import time +from types import TracebackType +from typing import ( + Any, + AsyncIterable, + AsyncIterator, + List, + Optional, + Tuple, + Type, + Union, +) + +import h11 + +from .._backends.base import AsyncNetworkStream +from .._exceptions import ( + ConnectionNotAvailable, + LocalProtocolError, + RemoteProtocolError, + WriteError, + map_exceptions, +) +from .._models import Origin, Request, Response +from .._synchronization import AsyncLock, AsyncShieldCancellation +from .._trace import Trace +from .interfaces import AsyncConnectionInterface + +logger = logging.getLogger("httpcore.http11") + + +# A subset of `h11.Event` types supported by `_send_event` +H11SendEvent = Union[ + h11.Request, + h11.Data, + h11.EndOfMessage, +] + + +class HTTPConnectionState(enum.IntEnum): + NEW = 0 + ACTIVE = 1 + IDLE = 2 + CLOSED = 3 + + +class AsyncHTTP11Connection(AsyncConnectionInterface): + READ_NUM_BYTES = 64 * 1024 + MAX_INCOMPLETE_EVENT_SIZE = 100 * 1024 + + def __init__( + self, + origin: Origin, + stream: AsyncNetworkStream, + keepalive_expiry: Optional[float] = None, + ) -> None: + self._origin = origin + self._network_stream = stream + self._keepalive_expiry: Optional[float] = keepalive_expiry + self._expire_at: Optional[float] = None + self._state = HTTPConnectionState.NEW + self._state_lock = AsyncLock() + self._request_count = 0 + self._h11_state = h11.Connection( + our_role=h11.CLIENT, + max_incomplete_event_size=self.MAX_INCOMPLETE_EVENT_SIZE, + ) + + async def handle_async_request(self, request: Request) -> Response: + if not self.can_handle_request(request.url.origin): + raise RuntimeError( + f"Attempted to send request to {request.url.origin} on connection " + f"to {self._origin}" + ) + + async with self._state_lock: + if self._state in (HTTPConnectionState.NEW, HTTPConnectionState.IDLE): + self._request_count += 1 + self._state = HTTPConnectionState.ACTIVE + self._expire_at = None + else: + raise ConnectionNotAvailable() + + try: + kwargs = {"request": request} + try: + async with Trace( + "send_request_headers", logger, request, kwargs + ) as trace: + await self._send_request_headers(**kwargs) + async with Trace("send_request_body", logger, request, kwargs) as trace: + await self._send_request_body(**kwargs) + except WriteError: + # If we get a write error while we're writing the request, + # then we supress this error and move on to attempting to + # read the response. Servers can sometimes close the request + # pre-emptively and then respond with a well formed HTTP + # error response. + pass + + async with Trace( + "receive_response_headers", logger, request, kwargs + ) as trace: + ( + http_version, + status, + reason_phrase, + headers, + trailing_data, + ) = await self._receive_response_headers(**kwargs) + trace.return_value = ( + http_version, + status, + reason_phrase, + headers, + ) + + network_stream = self._network_stream + + # CONNECT or Upgrade request + if (status == 101) or ( + (request.method == b"CONNECT") and (200 <= status < 300) + ): + network_stream = AsyncHTTP11UpgradeStream(network_stream, trailing_data) + + return Response( + status=status, + headers=headers, + content=HTTP11ConnectionByteStream(self, request), + extensions={ + "http_version": http_version, + "reason_phrase": reason_phrase, + "network_stream": network_stream, + }, + ) + except BaseException as exc: + with AsyncShieldCancellation(): + async with Trace("response_closed", logger, request) as trace: + await self._response_closed() + raise exc + + # Sending the request... + + async def _send_request_headers(self, request: Request) -> None: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("write", None) + + with map_exceptions({h11.LocalProtocolError: LocalProtocolError}): + event = h11.Request( + method=request.method, + target=request.url.target, + headers=request.headers, + ) + await self._send_event(event, timeout=timeout) + + async def _send_request_body(self, request: Request) -> None: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("write", None) + + assert isinstance(request.stream, AsyncIterable) + async for chunk in request.stream: + event = h11.Data(data=chunk) + await self._send_event(event, timeout=timeout) + + await self._send_event(h11.EndOfMessage(), timeout=timeout) + + async def _send_event( + self, event: h11.Event, timeout: Optional[float] = None + ) -> None: + bytes_to_send = self._h11_state.send(event) + if bytes_to_send is not None: + await self._network_stream.write(bytes_to_send, timeout=timeout) + + # Receiving the response... + + async def _receive_response_headers( + self, request: Request + ) -> Tuple[bytes, int, bytes, List[Tuple[bytes, bytes]], bytes]: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("read", None) + + while True: + event = await self._receive_event(timeout=timeout) + if isinstance(event, h11.Response): + break + if ( + isinstance(event, h11.InformationalResponse) + and event.status_code == 101 + ): + break + + http_version = b"HTTP/" + event.http_version + + # h11 version 0.11+ supports a `raw_items` interface to get the + # raw header casing, rather than the enforced lowercase headers. + headers = event.headers.raw_items() + + trailing_data, _ = self._h11_state.trailing_data + + return http_version, event.status_code, event.reason, headers, trailing_data + + async def _receive_response_body(self, request: Request) -> AsyncIterator[bytes]: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("read", None) + + while True: + event = await self._receive_event(timeout=timeout) + if isinstance(event, h11.Data): + yield bytes(event.data) + elif isinstance(event, (h11.EndOfMessage, h11.PAUSED)): + break + + async def _receive_event( + self, timeout: Optional[float] = None + ) -> Union[h11.Event, Type[h11.PAUSED]]: + while True: + with map_exceptions({h11.RemoteProtocolError: RemoteProtocolError}): + event = self._h11_state.next_event() + + if event is h11.NEED_DATA: + data = await self._network_stream.read( + self.READ_NUM_BYTES, timeout=timeout + ) + + # If we feed this case through h11 we'll raise an exception like: + # + # httpcore.RemoteProtocolError: can't handle event type + # ConnectionClosed when role=SERVER and state=SEND_RESPONSE + # + # Which is accurate, but not very informative from an end-user + # perspective. Instead we handle this case distinctly and treat + # it as a ConnectError. + if data == b"" and self._h11_state.their_state == h11.SEND_RESPONSE: + msg = "Server disconnected without sending a response." + raise RemoteProtocolError(msg) + + self._h11_state.receive_data(data) + else: + # mypy fails to narrow the type in the above if statement above + return event # type: ignore[return-value] + + async def _response_closed(self) -> None: + async with self._state_lock: + if ( + self._h11_state.our_state is h11.DONE + and self._h11_state.their_state is h11.DONE + ): + self._state = HTTPConnectionState.IDLE + self._h11_state.start_next_cycle() + if self._keepalive_expiry is not None: + now = time.monotonic() + self._expire_at = now + self._keepalive_expiry + else: + await self.aclose() + + # Once the connection is no longer required... + + async def aclose(self) -> None: + # Note that this method unilaterally closes the connection, and does + # not have any kind of locking in place around it. + self._state = HTTPConnectionState.CLOSED + await self._network_stream.aclose() + + # The AsyncConnectionInterface methods provide information about the state of + # the connection, allowing for a connection pooling implementation to + # determine when to reuse and when to close the connection... + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._origin + + def is_available(self) -> bool: + # Note that HTTP/1.1 connections in the "NEW" state are not treated as + # being "available". The control flow which created the connection will + # be able to send an outgoing request, but the connection will not be + # acquired from the connection pool for any other request. + return self._state == HTTPConnectionState.IDLE + + def has_expired(self) -> bool: + now = time.monotonic() + keepalive_expired = self._expire_at is not None and now > self._expire_at + + # If the HTTP connection is idle but the socket is readable, then the + # only valid state is that the socket is about to return b"", indicating + # a server-initiated disconnect. + server_disconnected = ( + self._state == HTTPConnectionState.IDLE + and self._network_stream.get_extra_info("is_readable") + ) + + return keepalive_expired or server_disconnected + + def is_idle(self) -> bool: + return self._state == HTTPConnectionState.IDLE + + def is_closed(self) -> bool: + return self._state == HTTPConnectionState.CLOSED + + def info(self) -> str: + origin = str(self._origin) + return ( + f"{origin!r}, HTTP/1.1, {self._state.name}, " + f"Request Count: {self._request_count}" + ) + + def __repr__(self) -> str: + class_name = self.__class__.__name__ + origin = str(self._origin) + return ( + f"<{class_name} [{origin!r}, {self._state.name}, " + f"Request Count: {self._request_count}]>" + ) + + # These context managers are not used in the standard flow, but are + # useful for testing or working with connection instances directly. + + async def __aenter__(self) -> "AsyncHTTP11Connection": + return self + + async def __aexit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + await self.aclose() + + +class HTTP11ConnectionByteStream: + def __init__(self, connection: AsyncHTTP11Connection, request: Request) -> None: + self._connection = connection + self._request = request + self._closed = False + + async def __aiter__(self) -> AsyncIterator[bytes]: + kwargs = {"request": self._request} + try: + async with Trace("receive_response_body", logger, self._request, kwargs): + async for chunk in self._connection._receive_response_body(**kwargs): + yield chunk + except BaseException as exc: + # If we get an exception while streaming the response, + # we want to close the response (and possibly the connection) + # before raising that exception. + with AsyncShieldCancellation(): + await self.aclose() + raise exc + + async def aclose(self) -> None: + if not self._closed: + self._closed = True + async with Trace("response_closed", logger, self._request): + await self._connection._response_closed() + + +class AsyncHTTP11UpgradeStream(AsyncNetworkStream): + def __init__(self, stream: AsyncNetworkStream, leading_data: bytes) -> None: + self._stream = stream + self._leading_data = leading_data + + async def read(self, max_bytes: int, timeout: Optional[float] = None) -> bytes: + if self._leading_data: + buffer = self._leading_data[:max_bytes] + self._leading_data = self._leading_data[max_bytes:] + return buffer + else: + return await self._stream.read(max_bytes, timeout) + + async def write(self, buffer: bytes, timeout: Optional[float] = None) -> None: + await self._stream.write(buffer, timeout) + + async def aclose(self) -> None: + await self._stream.aclose() + + async def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: Optional[str] = None, + timeout: Optional[float] = None, + ) -> AsyncNetworkStream: + return await self._stream.start_tls(ssl_context, server_hostname, timeout) + + def get_extra_info(self, info: str) -> Any: + return self._stream.get_extra_info(info) diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/http2.py b/venv/lib/python3.11/site-packages/httpcore/_async/http2.py new file mode 100644 index 0000000..c201ee4 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/http2.py @@ -0,0 +1,589 @@ +import enum +import logging +import time +import types +import typing + +import h2.config +import h2.connection +import h2.events +import h2.exceptions +import h2.settings + +from .._backends.base import AsyncNetworkStream +from .._exceptions import ( + ConnectionNotAvailable, + LocalProtocolError, + RemoteProtocolError, +) +from .._models import Origin, Request, Response +from .._synchronization import AsyncLock, AsyncSemaphore, AsyncShieldCancellation +from .._trace import Trace +from .interfaces import AsyncConnectionInterface + +logger = logging.getLogger("httpcore.http2") + + +def has_body_headers(request: Request) -> bool: + return any( + k.lower() == b"content-length" or k.lower() == b"transfer-encoding" + for k, v in request.headers + ) + + +class HTTPConnectionState(enum.IntEnum): + ACTIVE = 1 + IDLE = 2 + CLOSED = 3 + + +class AsyncHTTP2Connection(AsyncConnectionInterface): + READ_NUM_BYTES = 64 * 1024 + CONFIG = h2.config.H2Configuration(validate_inbound_headers=False) + + def __init__( + self, + origin: Origin, + stream: AsyncNetworkStream, + keepalive_expiry: typing.Optional[float] = None, + ): + self._origin = origin + self._network_stream = stream + self._keepalive_expiry: typing.Optional[float] = keepalive_expiry + self._h2_state = h2.connection.H2Connection(config=self.CONFIG) + self._state = HTTPConnectionState.IDLE + self._expire_at: typing.Optional[float] = None + self._request_count = 0 + self._init_lock = AsyncLock() + self._state_lock = AsyncLock() + self._read_lock = AsyncLock() + self._write_lock = AsyncLock() + self._sent_connection_init = False + self._used_all_stream_ids = False + self._connection_error = False + + # Mapping from stream ID to response stream events. + self._events: typing.Dict[ + int, + typing.Union[ + h2.events.ResponseReceived, + h2.events.DataReceived, + h2.events.StreamEnded, + h2.events.StreamReset, + ], + ] = {} + + # Connection terminated events are stored as state since + # we need to handle them for all streams. + self._connection_terminated: typing.Optional[h2.events.ConnectionTerminated] = ( + None + ) + + self._read_exception: typing.Optional[Exception] = None + self._write_exception: typing.Optional[Exception] = None + + async def handle_async_request(self, request: Request) -> Response: + if not self.can_handle_request(request.url.origin): + # This cannot occur in normal operation, since the connection pool + # will only send requests on connections that handle them. + # It's in place simply for resilience as a guard against incorrect + # usage, for anyone working directly with httpcore connections. + raise RuntimeError( + f"Attempted to send request to {request.url.origin} on connection " + f"to {self._origin}" + ) + + async with self._state_lock: + if self._state in (HTTPConnectionState.ACTIVE, HTTPConnectionState.IDLE): + self._request_count += 1 + self._expire_at = None + self._state = HTTPConnectionState.ACTIVE + else: + raise ConnectionNotAvailable() + + async with self._init_lock: + if not self._sent_connection_init: + try: + kwargs = {"request": request} + async with Trace("send_connection_init", logger, request, kwargs): + await self._send_connection_init(**kwargs) + except BaseException as exc: + with AsyncShieldCancellation(): + await self.aclose() + raise exc + + self._sent_connection_init = True + + # Initially start with just 1 until the remote server provides + # its max_concurrent_streams value + self._max_streams = 1 + + local_settings_max_streams = ( + self._h2_state.local_settings.max_concurrent_streams + ) + self._max_streams_semaphore = AsyncSemaphore(local_settings_max_streams) + + for _ in range(local_settings_max_streams - self._max_streams): + await self._max_streams_semaphore.acquire() + + await self._max_streams_semaphore.acquire() + + try: + stream_id = self._h2_state.get_next_available_stream_id() + self._events[stream_id] = [] + except h2.exceptions.NoAvailableStreamIDError: # pragma: nocover + self._used_all_stream_ids = True + self._request_count -= 1 + raise ConnectionNotAvailable() + + try: + kwargs = {"request": request, "stream_id": stream_id} + async with Trace("send_request_headers", logger, request, kwargs): + await self._send_request_headers(request=request, stream_id=stream_id) + async with Trace("send_request_body", logger, request, kwargs): + await self._send_request_body(request=request, stream_id=stream_id) + async with Trace( + "receive_response_headers", logger, request, kwargs + ) as trace: + status, headers = await self._receive_response( + request=request, stream_id=stream_id + ) + trace.return_value = (status, headers) + + return Response( + status=status, + headers=headers, + content=HTTP2ConnectionByteStream(self, request, stream_id=stream_id), + extensions={ + "http_version": b"HTTP/2", + "network_stream": self._network_stream, + "stream_id": stream_id, + }, + ) + except BaseException as exc: # noqa: PIE786 + with AsyncShieldCancellation(): + kwargs = {"stream_id": stream_id} + async with Trace("response_closed", logger, request, kwargs): + await self._response_closed(stream_id=stream_id) + + if isinstance(exc, h2.exceptions.ProtocolError): + # One case where h2 can raise a protocol error is when a + # closed frame has been seen by the state machine. + # + # This happens when one stream is reading, and encounters + # a GOAWAY event. Other flows of control may then raise + # a protocol error at any point they interact with the 'h2_state'. + # + # In this case we'll have stored the event, and should raise + # it as a RemoteProtocolError. + if self._connection_terminated: # pragma: nocover + raise RemoteProtocolError(self._connection_terminated) + # If h2 raises a protocol error in some other state then we + # must somehow have made a protocol violation. + raise LocalProtocolError(exc) # pragma: nocover + + raise exc + + async def _send_connection_init(self, request: Request) -> None: + """ + The HTTP/2 connection requires some initial setup before we can start + using individual request/response streams on it. + """ + # Need to set these manually here instead of manipulating via + # __setitem__() otherwise the H2Connection will emit SettingsUpdate + # frames in addition to sending the undesired defaults. + self._h2_state.local_settings = h2.settings.Settings( + client=True, + initial_values={ + # Disable PUSH_PROMISE frames from the server since we don't do anything + # with them for now. Maybe when we support caching? + h2.settings.SettingCodes.ENABLE_PUSH: 0, + # These two are taken from h2 for safe defaults + h2.settings.SettingCodes.MAX_CONCURRENT_STREAMS: 100, + h2.settings.SettingCodes.MAX_HEADER_LIST_SIZE: 65536, + }, + ) + + # Some websites (*cough* Yahoo *cough*) balk at this setting being + # present in the initial handshake since it's not defined in the original + # RFC despite the RFC mandating ignoring settings you don't know about. + del self._h2_state.local_settings[ + h2.settings.SettingCodes.ENABLE_CONNECT_PROTOCOL + ] + + self._h2_state.initiate_connection() + self._h2_state.increment_flow_control_window(2**24) + await self._write_outgoing_data(request) + + # Sending the request... + + async def _send_request_headers(self, request: Request, stream_id: int) -> None: + """ + Send the request headers to a given stream ID. + """ + end_stream = not has_body_headers(request) + + # In HTTP/2 the ':authority' pseudo-header is used instead of 'Host'. + # In order to gracefully handle HTTP/1.1 and HTTP/2 we always require + # HTTP/1.1 style headers, and map them appropriately if we end up on + # an HTTP/2 connection. + authority = [v for k, v in request.headers if k.lower() == b"host"][0] + + headers = [ + (b":method", request.method), + (b":authority", authority), + (b":scheme", request.url.scheme), + (b":path", request.url.target), + ] + [ + (k.lower(), v) + for k, v in request.headers + if k.lower() + not in ( + b"host", + b"transfer-encoding", + ) + ] + + self._h2_state.send_headers(stream_id, headers, end_stream=end_stream) + self._h2_state.increment_flow_control_window(2**24, stream_id=stream_id) + await self._write_outgoing_data(request) + + async def _send_request_body(self, request: Request, stream_id: int) -> None: + """ + Iterate over the request body sending it to a given stream ID. + """ + if not has_body_headers(request): + return + + assert isinstance(request.stream, typing.AsyncIterable) + async for data in request.stream: + await self._send_stream_data(request, stream_id, data) + await self._send_end_stream(request, stream_id) + + async def _send_stream_data( + self, request: Request, stream_id: int, data: bytes + ) -> None: + """ + Send a single chunk of data in one or more data frames. + """ + while data: + max_flow = await self._wait_for_outgoing_flow(request, stream_id) + chunk_size = min(len(data), max_flow) + chunk, data = data[:chunk_size], data[chunk_size:] + self._h2_state.send_data(stream_id, chunk) + await self._write_outgoing_data(request) + + async def _send_end_stream(self, request: Request, stream_id: int) -> None: + """ + Send an empty data frame on on a given stream ID with the END_STREAM flag set. + """ + self._h2_state.end_stream(stream_id) + await self._write_outgoing_data(request) + + # Receiving the response... + + async def _receive_response( + self, request: Request, stream_id: int + ) -> typing.Tuple[int, typing.List[typing.Tuple[bytes, bytes]]]: + """ + Return the response status code and headers for a given stream ID. + """ + while True: + event = await self._receive_stream_event(request, stream_id) + if isinstance(event, h2.events.ResponseReceived): + break + + status_code = 200 + headers = [] + for k, v in event.headers: + if k == b":status": + status_code = int(v.decode("ascii", errors="ignore")) + elif not k.startswith(b":"): + headers.append((k, v)) + + return (status_code, headers) + + async def _receive_response_body( + self, request: Request, stream_id: int + ) -> typing.AsyncIterator[bytes]: + """ + Iterator that returns the bytes of the response body for a given stream ID. + """ + while True: + event = await self._receive_stream_event(request, stream_id) + if isinstance(event, h2.events.DataReceived): + amount = event.flow_controlled_length + self._h2_state.acknowledge_received_data(amount, stream_id) + await self._write_outgoing_data(request) + yield event.data + elif isinstance(event, h2.events.StreamEnded): + break + + async def _receive_stream_event( + self, request: Request, stream_id: int + ) -> typing.Union[ + h2.events.ResponseReceived, h2.events.DataReceived, h2.events.StreamEnded + ]: + """ + Return the next available event for a given stream ID. + + Will read more data from the network if required. + """ + while not self._events.get(stream_id): + await self._receive_events(request, stream_id) + event = self._events[stream_id].pop(0) + if isinstance(event, h2.events.StreamReset): + raise RemoteProtocolError(event) + return event + + async def _receive_events( + self, request: Request, stream_id: typing.Optional[int] = None + ) -> None: + """ + Read some data from the network until we see one or more events + for a given stream ID. + """ + async with self._read_lock: + if self._connection_terminated is not None: + last_stream_id = self._connection_terminated.last_stream_id + if stream_id and last_stream_id and stream_id > last_stream_id: + self._request_count -= 1 + raise ConnectionNotAvailable() + raise RemoteProtocolError(self._connection_terminated) + + # This conditional is a bit icky. We don't want to block reading if we've + # actually got an event to return for a given stream. We need to do that + # check *within* the atomic read lock. Though it also need to be optional, + # because when we call it from `_wait_for_outgoing_flow` we *do* want to + # block until we've available flow control, event when we have events + # pending for the stream ID we're attempting to send on. + if stream_id is None or not self._events.get(stream_id): + events = await self._read_incoming_data(request) + for event in events: + if isinstance(event, h2.events.RemoteSettingsChanged): + async with Trace( + "receive_remote_settings", logger, request + ) as trace: + await self._receive_remote_settings_change(event) + trace.return_value = event + + elif isinstance( + event, + ( + h2.events.ResponseReceived, + h2.events.DataReceived, + h2.events.StreamEnded, + h2.events.StreamReset, + ), + ): + if event.stream_id in self._events: + self._events[event.stream_id].append(event) + + elif isinstance(event, h2.events.ConnectionTerminated): + self._connection_terminated = event + + await self._write_outgoing_data(request) + + async def _receive_remote_settings_change(self, event: h2.events.Event) -> None: + max_concurrent_streams = event.changed_settings.get( + h2.settings.SettingCodes.MAX_CONCURRENT_STREAMS + ) + if max_concurrent_streams: + new_max_streams = min( + max_concurrent_streams.new_value, + self._h2_state.local_settings.max_concurrent_streams, + ) + if new_max_streams and new_max_streams != self._max_streams: + while new_max_streams > self._max_streams: + await self._max_streams_semaphore.release() + self._max_streams += 1 + while new_max_streams < self._max_streams: + await self._max_streams_semaphore.acquire() + self._max_streams -= 1 + + async def _response_closed(self, stream_id: int) -> None: + await self._max_streams_semaphore.release() + del self._events[stream_id] + async with self._state_lock: + if self._connection_terminated and not self._events: + await self.aclose() + + elif self._state == HTTPConnectionState.ACTIVE and not self._events: + self._state = HTTPConnectionState.IDLE + if self._keepalive_expiry is not None: + now = time.monotonic() + self._expire_at = now + self._keepalive_expiry + if self._used_all_stream_ids: # pragma: nocover + await self.aclose() + + async def aclose(self) -> None: + # Note that this method unilaterally closes the connection, and does + # not have any kind of locking in place around it. + self._h2_state.close_connection() + self._state = HTTPConnectionState.CLOSED + await self._network_stream.aclose() + + # Wrappers around network read/write operations... + + async def _read_incoming_data( + self, request: Request + ) -> typing.List[h2.events.Event]: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("read", None) + + if self._read_exception is not None: + raise self._read_exception # pragma: nocover + + try: + data = await self._network_stream.read(self.READ_NUM_BYTES, timeout) + if data == b"": + raise RemoteProtocolError("Server disconnected") + except Exception as exc: + # If we get a network error we should: + # + # 1. Save the exception and just raise it immediately on any future reads. + # (For example, this means that a single read timeout or disconnect will + # immediately close all pending streams. Without requiring multiple + # sequential timeouts.) + # 2. Mark the connection as errored, so that we don't accept any other + # incoming requests. + self._read_exception = exc + self._connection_error = True + raise exc + + events: typing.List[h2.events.Event] = self._h2_state.receive_data(data) + + return events + + async def _write_outgoing_data(self, request: Request) -> None: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("write", None) + + async with self._write_lock: + data_to_send = self._h2_state.data_to_send() + + if self._write_exception is not None: + raise self._write_exception # pragma: nocover + + try: + await self._network_stream.write(data_to_send, timeout) + except Exception as exc: # pragma: nocover + # If we get a network error we should: + # + # 1. Save the exception and just raise it immediately on any future write. + # (For example, this means that a single write timeout or disconnect will + # immediately close all pending streams. Without requiring multiple + # sequential timeouts.) + # 2. Mark the connection as errored, so that we don't accept any other + # incoming requests. + self._write_exception = exc + self._connection_error = True + raise exc + + # Flow control... + + async def _wait_for_outgoing_flow(self, request: Request, stream_id: int) -> int: + """ + Returns the maximum allowable outgoing flow for a given stream. + + If the allowable flow is zero, then waits on the network until + WindowUpdated frames have increased the flow rate. + https://tools.ietf.org/html/rfc7540#section-6.9 + """ + local_flow: int = self._h2_state.local_flow_control_window(stream_id) + max_frame_size: int = self._h2_state.max_outbound_frame_size + flow = min(local_flow, max_frame_size) + while flow == 0: + await self._receive_events(request) + local_flow = self._h2_state.local_flow_control_window(stream_id) + max_frame_size = self._h2_state.max_outbound_frame_size + flow = min(local_flow, max_frame_size) + return flow + + # Interface for connection pooling... + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._origin + + def is_available(self) -> bool: + return ( + self._state != HTTPConnectionState.CLOSED + and not self._connection_error + and not self._used_all_stream_ids + and not ( + self._h2_state.state_machine.state + == h2.connection.ConnectionState.CLOSED + ) + ) + + def has_expired(self) -> bool: + now = time.monotonic() + return self._expire_at is not None and now > self._expire_at + + def is_idle(self) -> bool: + return self._state == HTTPConnectionState.IDLE + + def is_closed(self) -> bool: + return self._state == HTTPConnectionState.CLOSED + + def info(self) -> str: + origin = str(self._origin) + return ( + f"{origin!r}, HTTP/2, {self._state.name}, " + f"Request Count: {self._request_count}" + ) + + def __repr__(self) -> str: + class_name = self.__class__.__name__ + origin = str(self._origin) + return ( + f"<{class_name} [{origin!r}, {self._state.name}, " + f"Request Count: {self._request_count}]>" + ) + + # These context managers are not used in the standard flow, but are + # useful for testing or working with connection instances directly. + + async def __aenter__(self) -> "AsyncHTTP2Connection": + return self + + async def __aexit__( + self, + exc_type: typing.Optional[typing.Type[BaseException]] = None, + exc_value: typing.Optional[BaseException] = None, + traceback: typing.Optional[types.TracebackType] = None, + ) -> None: + await self.aclose() + + +class HTTP2ConnectionByteStream: + def __init__( + self, connection: AsyncHTTP2Connection, request: Request, stream_id: int + ) -> None: + self._connection = connection + self._request = request + self._stream_id = stream_id + self._closed = False + + async def __aiter__(self) -> typing.AsyncIterator[bytes]: + kwargs = {"request": self._request, "stream_id": self._stream_id} + try: + async with Trace("receive_response_body", logger, self._request, kwargs): + async for chunk in self._connection._receive_response_body( + request=self._request, stream_id=self._stream_id + ): + yield chunk + except BaseException as exc: + # If we get an exception while streaming the response, + # we want to close the response (and possibly the connection) + # before raising that exception. + with AsyncShieldCancellation(): + await self.aclose() + raise exc + + async def aclose(self) -> None: + if not self._closed: + self._closed = True + kwargs = {"stream_id": self._stream_id} + async with Trace("response_closed", logger, self._request, kwargs): + await self._connection._response_closed(stream_id=self._stream_id) diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/http_proxy.py b/venv/lib/python3.11/site-packages/httpcore/_async/http_proxy.py new file mode 100644 index 0000000..4aa7d87 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/http_proxy.py @@ -0,0 +1,368 @@ +import logging +import ssl +from base64 import b64encode +from typing import Iterable, List, Mapping, Optional, Sequence, Tuple, Union + +from .._backends.base import SOCKET_OPTION, AsyncNetworkBackend +from .._exceptions import ProxyError +from .._models import ( + URL, + Origin, + Request, + Response, + enforce_bytes, + enforce_headers, + enforce_url, +) +from .._ssl import default_ssl_context +from .._synchronization import AsyncLock +from .._trace import Trace +from .connection import AsyncHTTPConnection +from .connection_pool import AsyncConnectionPool +from .http11 import AsyncHTTP11Connection +from .interfaces import AsyncConnectionInterface + +HeadersAsSequence = Sequence[Tuple[Union[bytes, str], Union[bytes, str]]] +HeadersAsMapping = Mapping[Union[bytes, str], Union[bytes, str]] + + +logger = logging.getLogger("httpcore.proxy") + + +def merge_headers( + default_headers: Optional[Sequence[Tuple[bytes, bytes]]] = None, + override_headers: Optional[Sequence[Tuple[bytes, bytes]]] = None, +) -> List[Tuple[bytes, bytes]]: + """ + Append default_headers and override_headers, de-duplicating if a key exists + in both cases. + """ + default_headers = [] if default_headers is None else list(default_headers) + override_headers = [] if override_headers is None else list(override_headers) + has_override = set(key.lower() for key, value in override_headers) + default_headers = [ + (key, value) + for key, value in default_headers + if key.lower() not in has_override + ] + return default_headers + override_headers + + +def build_auth_header(username: bytes, password: bytes) -> bytes: + userpass = username + b":" + password + return b"Basic " + b64encode(userpass) + + +class AsyncHTTPProxy(AsyncConnectionPool): + """ + A connection pool that sends requests via an HTTP proxy. + """ + + def __init__( + self, + proxy_url: Union[URL, bytes, str], + proxy_auth: Optional[Tuple[Union[bytes, str], Union[bytes, str]]] = None, + proxy_headers: Union[HeadersAsMapping, HeadersAsSequence, None] = None, + ssl_context: Optional[ssl.SSLContext] = None, + proxy_ssl_context: Optional[ssl.SSLContext] = None, + max_connections: Optional[int] = 10, + max_keepalive_connections: Optional[int] = None, + keepalive_expiry: Optional[float] = None, + http1: bool = True, + http2: bool = False, + retries: int = 0, + local_address: Optional[str] = None, + uds: Optional[str] = None, + network_backend: Optional[AsyncNetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + ) -> None: + """ + A connection pool for making HTTP requests. + + Parameters: + proxy_url: The URL to use when connecting to the proxy server. + For example `"http://127.0.0.1:8080/"`. + proxy_auth: Any proxy authentication as a two-tuple of + (username, password). May be either bytes or ascii-only str. + proxy_headers: Any HTTP headers to use for the proxy requests. + For example `{"Proxy-Authorization": "Basic <username>:<password>"}`. + ssl_context: An SSL context to use for verifying connections. + If not specified, the default `httpcore.default_ssl_context()` + will be used. + proxy_ssl_context: The same as `ssl_context`, but for a proxy server rather than a remote origin. + max_connections: The maximum number of concurrent HTTP connections that + the pool should allow. Any attempt to send a request on a pool that + would exceed this amount will block until a connection is available. + max_keepalive_connections: The maximum number of idle HTTP connections + that will be maintained in the pool. + keepalive_expiry: The duration in seconds that an idle HTTP connection + may be maintained for before being expired from the pool. + http1: A boolean indicating if HTTP/1.1 requests should be supported + by the connection pool. Defaults to True. + http2: A boolean indicating if HTTP/2 requests should be supported by + the connection pool. Defaults to False. + retries: The maximum number of retries when trying to establish + a connection. + local_address: Local address to connect from. Can also be used to + connect using a particular address family. Using + `local_address="0.0.0.0"` will connect using an `AF_INET` address + (IPv4), while using `local_address="::"` will connect using an + `AF_INET6` address (IPv6). + uds: Path to a Unix Domain Socket to use instead of TCP sockets. + network_backend: A backend instance to use for handling network I/O. + """ + super().__init__( + ssl_context=ssl_context, + max_connections=max_connections, + max_keepalive_connections=max_keepalive_connections, + keepalive_expiry=keepalive_expiry, + http1=http1, + http2=http2, + network_backend=network_backend, + retries=retries, + local_address=local_address, + uds=uds, + socket_options=socket_options, + ) + + self._proxy_url = enforce_url(proxy_url, name="proxy_url") + if ( + self._proxy_url.scheme == b"http" and proxy_ssl_context is not None + ): # pragma: no cover + raise RuntimeError( + "The `proxy_ssl_context` argument is not allowed for the http scheme" + ) + + self._ssl_context = ssl_context + self._proxy_ssl_context = proxy_ssl_context + self._proxy_headers = enforce_headers(proxy_headers, name="proxy_headers") + if proxy_auth is not None: + username = enforce_bytes(proxy_auth[0], name="proxy_auth") + password = enforce_bytes(proxy_auth[1], name="proxy_auth") + authorization = build_auth_header(username, password) + self._proxy_headers = [ + (b"Proxy-Authorization", authorization) + ] + self._proxy_headers + + def create_connection(self, origin: Origin) -> AsyncConnectionInterface: + if origin.scheme == b"http": + return AsyncForwardHTTPConnection( + proxy_origin=self._proxy_url.origin, + proxy_headers=self._proxy_headers, + remote_origin=origin, + keepalive_expiry=self._keepalive_expiry, + network_backend=self._network_backend, + proxy_ssl_context=self._proxy_ssl_context, + ) + return AsyncTunnelHTTPConnection( + proxy_origin=self._proxy_url.origin, + proxy_headers=self._proxy_headers, + remote_origin=origin, + ssl_context=self._ssl_context, + proxy_ssl_context=self._proxy_ssl_context, + keepalive_expiry=self._keepalive_expiry, + http1=self._http1, + http2=self._http2, + network_backend=self._network_backend, + ) + + +class AsyncForwardHTTPConnection(AsyncConnectionInterface): + def __init__( + self, + proxy_origin: Origin, + remote_origin: Origin, + proxy_headers: Union[HeadersAsMapping, HeadersAsSequence, None] = None, + keepalive_expiry: Optional[float] = None, + network_backend: Optional[AsyncNetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + proxy_ssl_context: Optional[ssl.SSLContext] = None, + ) -> None: + self._connection = AsyncHTTPConnection( + origin=proxy_origin, + keepalive_expiry=keepalive_expiry, + network_backend=network_backend, + socket_options=socket_options, + ssl_context=proxy_ssl_context, + ) + self._proxy_origin = proxy_origin + self._proxy_headers = enforce_headers(proxy_headers, name="proxy_headers") + self._remote_origin = remote_origin + + async def handle_async_request(self, request: Request) -> Response: + headers = merge_headers(self._proxy_headers, request.headers) + url = URL( + scheme=self._proxy_origin.scheme, + host=self._proxy_origin.host, + port=self._proxy_origin.port, + target=bytes(request.url), + ) + proxy_request = Request( + method=request.method, + url=url, + headers=headers, + content=request.stream, + extensions=request.extensions, + ) + return await self._connection.handle_async_request(proxy_request) + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._remote_origin + + async def aclose(self) -> None: + await self._connection.aclose() + + def info(self) -> str: + return self._connection.info() + + def is_available(self) -> bool: + return self._connection.is_available() + + def has_expired(self) -> bool: + return self._connection.has_expired() + + def is_idle(self) -> bool: + return self._connection.is_idle() + + def is_closed(self) -> bool: + return self._connection.is_closed() + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.info()}]>" + + +class AsyncTunnelHTTPConnection(AsyncConnectionInterface): + def __init__( + self, + proxy_origin: Origin, + remote_origin: Origin, + ssl_context: Optional[ssl.SSLContext] = None, + proxy_ssl_context: Optional[ssl.SSLContext] = None, + proxy_headers: Optional[Sequence[Tuple[bytes, bytes]]] = None, + keepalive_expiry: Optional[float] = None, + http1: bool = True, + http2: bool = False, + network_backend: Optional[AsyncNetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + ) -> None: + self._connection: AsyncConnectionInterface = AsyncHTTPConnection( + origin=proxy_origin, + keepalive_expiry=keepalive_expiry, + network_backend=network_backend, + socket_options=socket_options, + ssl_context=proxy_ssl_context, + ) + self._proxy_origin = proxy_origin + self._remote_origin = remote_origin + self._ssl_context = ssl_context + self._proxy_ssl_context = proxy_ssl_context + self._proxy_headers = enforce_headers(proxy_headers, name="proxy_headers") + self._keepalive_expiry = keepalive_expiry + self._http1 = http1 + self._http2 = http2 + self._connect_lock = AsyncLock() + self._connected = False + + async def handle_async_request(self, request: Request) -> Response: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("connect", None) + + async with self._connect_lock: + if not self._connected: + target = b"%b:%d" % (self._remote_origin.host, self._remote_origin.port) + + connect_url = URL( + scheme=self._proxy_origin.scheme, + host=self._proxy_origin.host, + port=self._proxy_origin.port, + target=target, + ) + connect_headers = merge_headers( + [(b"Host", target), (b"Accept", b"*/*")], self._proxy_headers + ) + connect_request = Request( + method=b"CONNECT", + url=connect_url, + headers=connect_headers, + extensions=request.extensions, + ) + connect_response = await self._connection.handle_async_request( + connect_request + ) + + if connect_response.status < 200 or connect_response.status > 299: + reason_bytes = connect_response.extensions.get("reason_phrase", b"") + reason_str = reason_bytes.decode("ascii", errors="ignore") + msg = "%d %s" % (connect_response.status, reason_str) + await self._connection.aclose() + raise ProxyError(msg) + + stream = connect_response.extensions["network_stream"] + + # Upgrade the stream to SSL + ssl_context = ( + default_ssl_context() + if self._ssl_context is None + else self._ssl_context + ) + alpn_protocols = ["http/1.1", "h2"] if self._http2 else ["http/1.1"] + ssl_context.set_alpn_protocols(alpn_protocols) + + kwargs = { + "ssl_context": ssl_context, + "server_hostname": self._remote_origin.host.decode("ascii"), + "timeout": timeout, + } + async with Trace("start_tls", logger, request, kwargs) as trace: + stream = await stream.start_tls(**kwargs) + trace.return_value = stream + + # Determine if we should be using HTTP/1.1 or HTTP/2 + ssl_object = stream.get_extra_info("ssl_object") + http2_negotiated = ( + ssl_object is not None + and ssl_object.selected_alpn_protocol() == "h2" + ) + + # Create the HTTP/1.1 or HTTP/2 connection + if http2_negotiated or (self._http2 and not self._http1): + from .http2 import AsyncHTTP2Connection + + self._connection = AsyncHTTP2Connection( + origin=self._remote_origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + else: + self._connection = AsyncHTTP11Connection( + origin=self._remote_origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + + self._connected = True + return await self._connection.handle_async_request(request) + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._remote_origin + + async def aclose(self) -> None: + await self._connection.aclose() + + def info(self) -> str: + return self._connection.info() + + def is_available(self) -> bool: + return self._connection.is_available() + + def has_expired(self) -> bool: + return self._connection.has_expired() + + def is_idle(self) -> bool: + return self._connection.is_idle() + + def is_closed(self) -> bool: + return self._connection.is_closed() + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.info()}]>" diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/interfaces.py b/venv/lib/python3.11/site-packages/httpcore/_async/interfaces.py new file mode 100644 index 0000000..c998dd2 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/interfaces.py @@ -0,0 +1,135 @@ +from contextlib import asynccontextmanager +from typing import AsyncIterator, Optional, Union + +from .._models import ( + URL, + Extensions, + HeaderTypes, + Origin, + Request, + Response, + enforce_bytes, + enforce_headers, + enforce_url, + include_request_headers, +) + + +class AsyncRequestInterface: + async def request( + self, + method: Union[bytes, str], + url: Union[URL, bytes, str], + *, + headers: HeaderTypes = None, + content: Union[bytes, AsyncIterator[bytes], None] = None, + extensions: Optional[Extensions] = None, + ) -> Response: + # Strict type checking on our parameters. + method = enforce_bytes(method, name="method") + url = enforce_url(url, name="url") + headers = enforce_headers(headers, name="headers") + + # Include Host header, and optionally Content-Length or Transfer-Encoding. + headers = include_request_headers(headers, url=url, content=content) + + request = Request( + method=method, + url=url, + headers=headers, + content=content, + extensions=extensions, + ) + response = await self.handle_async_request(request) + try: + await response.aread() + finally: + await response.aclose() + return response + + @asynccontextmanager + async def stream( + self, + method: Union[bytes, str], + url: Union[URL, bytes, str], + *, + headers: HeaderTypes = None, + content: Union[bytes, AsyncIterator[bytes], None] = None, + extensions: Optional[Extensions] = None, + ) -> AsyncIterator[Response]: + # Strict type checking on our parameters. + method = enforce_bytes(method, name="method") + url = enforce_url(url, name="url") + headers = enforce_headers(headers, name="headers") + + # Include Host header, and optionally Content-Length or Transfer-Encoding. + headers = include_request_headers(headers, url=url, content=content) + + request = Request( + method=method, + url=url, + headers=headers, + content=content, + extensions=extensions, + ) + response = await self.handle_async_request(request) + try: + yield response + finally: + await response.aclose() + + async def handle_async_request(self, request: Request) -> Response: + raise NotImplementedError() # pragma: nocover + + +class AsyncConnectionInterface(AsyncRequestInterface): + async def aclose(self) -> None: + raise NotImplementedError() # pragma: nocover + + def info(self) -> str: + raise NotImplementedError() # pragma: nocover + + def can_handle_request(self, origin: Origin) -> bool: + raise NotImplementedError() # pragma: nocover + + def is_available(self) -> bool: + """ + Return `True` if the connection is currently able to accept an + outgoing request. + + An HTTP/1.1 connection will only be available if it is currently idle. + + An HTTP/2 connection will be available so long as the stream ID space is + not yet exhausted, and the connection is not in an error state. + + While the connection is being established we may not yet know if it is going + to result in an HTTP/1.1 or HTTP/2 connection. The connection should be + treated as being available, but might ultimately raise `NewConnectionRequired` + required exceptions if multiple requests are attempted over a connection + that ends up being established as HTTP/1.1. + """ + raise NotImplementedError() # pragma: nocover + + def has_expired(self) -> bool: + """ + Return `True` if the connection is in a state where it should be closed. + + This either means that the connection is idle and it has passed the + expiry time on its keep-alive, or that server has sent an EOF. + """ + raise NotImplementedError() # pragma: nocover + + def is_idle(self) -> bool: + """ + Return `True` if the connection is currently idle. + """ + raise NotImplementedError() # pragma: nocover + + def is_closed(self) -> bool: + """ + Return `True` if the connection has been closed. + + Used when a response is closed to determine if the connection may be + returned to the connection pool or not. + """ + raise NotImplementedError() # pragma: nocover diff --git a/venv/lib/python3.11/site-packages/httpcore/_async/socks_proxy.py b/venv/lib/python3.11/site-packages/httpcore/_async/socks_proxy.py new file mode 100644 index 0000000..f839603 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_async/socks_proxy.py @@ -0,0 +1,342 @@ +import logging +import ssl +import typing + +from socksio import socks5 + +from .._backends.auto import AutoBackend +from .._backends.base import AsyncNetworkBackend, AsyncNetworkStream +from .._exceptions import ConnectionNotAvailable, ProxyError +from .._models import URL, Origin, Request, Response, enforce_bytes, enforce_url +from .._ssl import default_ssl_context +from .._synchronization import AsyncLock +from .._trace import Trace +from .connection_pool import AsyncConnectionPool +from .http11 import AsyncHTTP11Connection +from .interfaces import AsyncConnectionInterface + +logger = logging.getLogger("httpcore.socks") + + +AUTH_METHODS = { + b"\x00": "NO AUTHENTICATION REQUIRED", + b"\x01": "GSSAPI", + b"\x02": "USERNAME/PASSWORD", + b"\xff": "NO ACCEPTABLE METHODS", +} + +REPLY_CODES = { + b"\x00": "Succeeded", + b"\x01": "General SOCKS server failure", + b"\x02": "Connection not allowed by ruleset", + b"\x03": "Network unreachable", + b"\x04": "Host unreachable", + b"\x05": "Connection refused", + b"\x06": "TTL expired", + b"\x07": "Command not supported", + b"\x08": "Address type not supported", +} + + +async def _init_socks5_connection( + stream: AsyncNetworkStream, + *, + host: bytes, + port: int, + auth: typing.Optional[typing.Tuple[bytes, bytes]] = None, +) -> None: + conn = socks5.SOCKS5Connection() + + # Auth method request + auth_method = ( + socks5.SOCKS5AuthMethod.NO_AUTH_REQUIRED + if auth is None + else socks5.SOCKS5AuthMethod.USERNAME_PASSWORD + ) + conn.send(socks5.SOCKS5AuthMethodsRequest([auth_method])) + outgoing_bytes = conn.data_to_send() + await stream.write(outgoing_bytes) + + # Auth method response + incoming_bytes = await stream.read(max_bytes=4096) + response = conn.receive_data(incoming_bytes) + assert isinstance(response, socks5.SOCKS5AuthReply) + if response.method != auth_method: + requested = AUTH_METHODS.get(auth_method, "UNKNOWN") + responded = AUTH_METHODS.get(response.method, "UNKNOWN") + raise ProxyError( + f"Requested {requested} from proxy server, but got {responded}." + ) + + if response.method == socks5.SOCKS5AuthMethod.USERNAME_PASSWORD: + # Username/password request + assert auth is not None + username, password = auth + conn.send(socks5.SOCKS5UsernamePasswordRequest(username, password)) + outgoing_bytes = conn.data_to_send() + await stream.write(outgoing_bytes) + + # Username/password response + incoming_bytes = await stream.read(max_bytes=4096) + response = conn.receive_data(incoming_bytes) + assert isinstance(response, socks5.SOCKS5UsernamePasswordReply) + if not response.success: + raise ProxyError("Invalid username/password") + + # Connect request + conn.send( + socks5.SOCKS5CommandRequest.from_address( + socks5.SOCKS5Command.CONNECT, (host, port) + ) + ) + outgoing_bytes = conn.data_to_send() + await stream.write(outgoing_bytes) + + # Connect response + incoming_bytes = await stream.read(max_bytes=4096) + response = conn.receive_data(incoming_bytes) + assert isinstance(response, socks5.SOCKS5Reply) + if response.reply_code != socks5.SOCKS5ReplyCode.SUCCEEDED: + reply_code = REPLY_CODES.get(response.reply_code, "UNKOWN") + raise ProxyError(f"Proxy Server could not connect: {reply_code}.") + + +class AsyncSOCKSProxy(AsyncConnectionPool): + """ + A connection pool that sends requests via an HTTP proxy. + """ + + def __init__( + self, + proxy_url: typing.Union[URL, bytes, str], + proxy_auth: typing.Optional[ + typing.Tuple[typing.Union[bytes, str], typing.Union[bytes, str]] + ] = None, + ssl_context: typing.Optional[ssl.SSLContext] = None, + max_connections: typing.Optional[int] = 10, + max_keepalive_connections: typing.Optional[int] = None, + keepalive_expiry: typing.Optional[float] = None, + http1: bool = True, + http2: bool = False, + retries: int = 0, + network_backend: typing.Optional[AsyncNetworkBackend] = None, + ) -> None: + """ + A connection pool for making HTTP requests. + + Parameters: + proxy_url: The URL to use when connecting to the proxy server. + For example `"http://127.0.0.1:8080/"`. + ssl_context: An SSL context to use for verifying connections. + If not specified, the default `httpcore.default_ssl_context()` + will be used. + max_connections: The maximum number of concurrent HTTP connections that + the pool should allow. Any attempt to send a request on a pool that + would exceed this amount will block until a connection is available. + max_keepalive_connections: The maximum number of idle HTTP connections + that will be maintained in the pool. + keepalive_expiry: The duration in seconds that an idle HTTP connection + may be maintained for before being expired from the pool. + http1: A boolean indicating if HTTP/1.1 requests should be supported + by the connection pool. Defaults to True. + http2: A boolean indicating if HTTP/2 requests should be supported by + the connection pool. Defaults to False. + retries: The maximum number of retries when trying to establish + a connection. + local_address: Local address to connect from. Can also be used to + connect using a particular address family. Using + `local_address="0.0.0.0"` will connect using an `AF_INET` address + (IPv4), while using `local_address="::"` will connect using an + `AF_INET6` address (IPv6). + uds: Path to a Unix Domain Socket to use instead of TCP sockets. + network_backend: A backend instance to use for handling network I/O. + """ + super().__init__( + ssl_context=ssl_context, + max_connections=max_connections, + max_keepalive_connections=max_keepalive_connections, + keepalive_expiry=keepalive_expiry, + http1=http1, + http2=http2, + network_backend=network_backend, + retries=retries, + ) + self._ssl_context = ssl_context + self._proxy_url = enforce_url(proxy_url, name="proxy_url") + if proxy_auth is not None: + username, password = proxy_auth + username_bytes = enforce_bytes(username, name="proxy_auth") + password_bytes = enforce_bytes(password, name="proxy_auth") + self._proxy_auth: typing.Optional[typing.Tuple[bytes, bytes]] = ( + username_bytes, + password_bytes, + ) + else: + self._proxy_auth = None + + def create_connection(self, origin: Origin) -> AsyncConnectionInterface: + return AsyncSocks5Connection( + proxy_origin=self._proxy_url.origin, + remote_origin=origin, + proxy_auth=self._proxy_auth, + ssl_context=self._ssl_context, + keepalive_expiry=self._keepalive_expiry, + http1=self._http1, + http2=self._http2, + network_backend=self._network_backend, + ) + + +class AsyncSocks5Connection(AsyncConnectionInterface): + def __init__( + self, + proxy_origin: Origin, + remote_origin: Origin, + proxy_auth: typing.Optional[typing.Tuple[bytes, bytes]] = None, + ssl_context: typing.Optional[ssl.SSLContext] = None, + keepalive_expiry: typing.Optional[float] = None, + http1: bool = True, + http2: bool = False, + network_backend: typing.Optional[AsyncNetworkBackend] = None, + ) -> None: + self._proxy_origin = proxy_origin + self._remote_origin = remote_origin + self._proxy_auth = proxy_auth + self._ssl_context = ssl_context + self._keepalive_expiry = keepalive_expiry + self._http1 = http1 + self._http2 = http2 + + self._network_backend: AsyncNetworkBackend = ( + AutoBackend() if network_backend is None else network_backend + ) + self._connect_lock = AsyncLock() + self._connection: typing.Optional[AsyncConnectionInterface] = None + self._connect_failed = False + + async def handle_async_request(self, request: Request) -> Response: + timeouts = request.extensions.get("timeout", {}) + sni_hostname = request.extensions.get("sni_hostname", None) + timeout = timeouts.get("connect", None) + + async with self._connect_lock: + if self._connection is None: + try: + # Connect to the proxy + kwargs = { + "host": self._proxy_origin.host.decode("ascii"), + "port": self._proxy_origin.port, + "timeout": timeout, + } + async with Trace("connect_tcp", logger, request, kwargs) as trace: + stream = await self._network_backend.connect_tcp(**kwargs) + trace.return_value = stream + + # Connect to the remote host using socks5 + kwargs = { + "stream": stream, + "host": self._remote_origin.host.decode("ascii"), + "port": self._remote_origin.port, + "auth": self._proxy_auth, + } + async with Trace( + "setup_socks5_connection", logger, request, kwargs + ) as trace: + await _init_socks5_connection(**kwargs) + trace.return_value = stream + + # Upgrade the stream to SSL + if self._remote_origin.scheme == b"https": + ssl_context = ( + default_ssl_context() + if self._ssl_context is None + else self._ssl_context + ) + alpn_protocols = ( + ["http/1.1", "h2"] if self._http2 else ["http/1.1"] + ) + ssl_context.set_alpn_protocols(alpn_protocols) + + kwargs = { + "ssl_context": ssl_context, + "server_hostname": sni_hostname + or self._remote_origin.host.decode("ascii"), + "timeout": timeout, + } + async with Trace("start_tls", logger, request, kwargs) as trace: + stream = await stream.start_tls(**kwargs) + trace.return_value = stream + + # Determine if we should be using HTTP/1.1 or HTTP/2 + ssl_object = stream.get_extra_info("ssl_object") + http2_negotiated = ( + ssl_object is not None + and ssl_object.selected_alpn_protocol() == "h2" + ) + + # Create the HTTP/1.1 or HTTP/2 connection + if http2_negotiated or ( + self._http2 and not self._http1 + ): # pragma: nocover + from .http2 import AsyncHTTP2Connection + + self._connection = AsyncHTTP2Connection( + origin=self._remote_origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + else: + self._connection = AsyncHTTP11Connection( + origin=self._remote_origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + except Exception as exc: + self._connect_failed = True + raise exc + elif not self._connection.is_available(): # pragma: nocover + raise ConnectionNotAvailable() + + return await self._connection.handle_async_request(request) + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._remote_origin + + async def aclose(self) -> None: + if self._connection is not None: + await self._connection.aclose() + + def is_available(self) -> bool: + if self._connection is None: # pragma: nocover + # If HTTP/2 support is enabled, and the resulting connection could + # end up as HTTP/2 then we should indicate the connection as being + # available to service multiple requests. + return ( + self._http2 + and (self._remote_origin.scheme == b"https" or not self._http1) + and not self._connect_failed + ) + return self._connection.is_available() + + def has_expired(self) -> bool: + if self._connection is None: # pragma: nocover + return self._connect_failed + return self._connection.has_expired() + + def is_idle(self) -> bool: + if self._connection is None: # pragma: nocover + return self._connect_failed + return self._connection.is_idle() + + def is_closed(self) -> bool: + if self._connection is None: # pragma: nocover + return self._connect_failed + return self._connection.is_closed() + + def info(self) -> str: + if self._connection is None: # pragma: nocover + return "CONNECTION FAILED" if self._connect_failed else "CONNECTING" + return self._connection.info() + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.info()}]>" diff --git a/venv/lib/python3.11/site-packages/httpcore/_backends/__init__.py b/venv/lib/python3.11/site-packages/httpcore/_backends/__init__.py new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_backends/__init__.py diff --git a/venv/lib/python3.11/site-packages/httpcore/_backends/__pycache__/__init__.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_backends/__pycache__/__init__.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..f09b8a4 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_backends/__pycache__/__init__.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_backends/__pycache__/anyio.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_backends/__pycache__/anyio.cpython-311.pyc Binary files differnew file mode 100644 index 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a/venv/lib/python3.11/site-packages/httpcore/_backends/anyio.py b/venv/lib/python3.11/site-packages/httpcore/_backends/anyio.py new file mode 100644 index 0000000..5731f5e --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_backends/anyio.py @@ -0,0 +1,147 @@ +import ssl +import typing + +import anyio + +from .._exceptions import ( + ConnectError, + ConnectTimeout, + ReadError, + ReadTimeout, + WriteError, + WriteTimeout, + map_exceptions, +) +from .._utils import is_socket_readable +from .base import SOCKET_OPTION, AsyncNetworkBackend, AsyncNetworkStream + + +class AnyIOStream(AsyncNetworkStream): + def __init__(self, stream: anyio.abc.ByteStream) -> None: + self._stream = stream + + async def read( + self, max_bytes: int, timeout: typing.Optional[float] = None + ) -> bytes: + exc_map = { + TimeoutError: ReadTimeout, + anyio.BrokenResourceError: ReadError, + anyio.ClosedResourceError: ReadError, + anyio.EndOfStream: ReadError, + } + with map_exceptions(exc_map): + with anyio.fail_after(timeout): + try: + return await self._stream.receive(max_bytes=max_bytes) + except anyio.EndOfStream: # pragma: nocover + return b"" + + async def write( + self, buffer: bytes, timeout: typing.Optional[float] = None + ) -> None: + if not buffer: + return + + exc_map = { + TimeoutError: WriteTimeout, + anyio.BrokenResourceError: WriteError, + anyio.ClosedResourceError: WriteError, + } + with map_exceptions(exc_map): + with anyio.fail_after(timeout): + await self._stream.send(item=buffer) + + async def aclose(self) -> None: + await self._stream.aclose() + + async def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: typing.Optional[str] = None, + timeout: typing.Optional[float] = None, + ) -> AsyncNetworkStream: + exc_map = { + TimeoutError: ConnectTimeout, + anyio.BrokenResourceError: ConnectError, + anyio.EndOfStream: ConnectError, + } + with map_exceptions(exc_map): + try: + with anyio.fail_after(timeout): + ssl_stream = await anyio.streams.tls.TLSStream.wrap( + self._stream, + ssl_context=ssl_context, + hostname=server_hostname, + standard_compatible=False, + server_side=False, + ) + except Exception as exc: # pragma: nocover + await self.aclose() + raise exc + return AnyIOStream(ssl_stream) + + def get_extra_info(self, info: str) -> typing.Any: + if info == "ssl_object": + return self._stream.extra(anyio.streams.tls.TLSAttribute.ssl_object, None) + if info == "client_addr": + return self._stream.extra(anyio.abc.SocketAttribute.local_address, None) + if info == "server_addr": + return self._stream.extra(anyio.abc.SocketAttribute.remote_address, None) + if info == "socket": + return self._stream.extra(anyio.abc.SocketAttribute.raw_socket, None) + if info == "is_readable": + sock = self._stream.extra(anyio.abc.SocketAttribute.raw_socket, None) + return is_socket_readable(sock) + return None + + +class AnyIOBackend(AsyncNetworkBackend): + async def connect_tcp( + self, + host: str, + port: int, + timeout: typing.Optional[float] = None, + local_address: typing.Optional[str] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: + if socket_options is None: + socket_options = [] # pragma: no cover + exc_map = { + TimeoutError: ConnectTimeout, + OSError: ConnectError, + anyio.BrokenResourceError: ConnectError, + } + with map_exceptions(exc_map): + with anyio.fail_after(timeout): + stream: anyio.abc.ByteStream = await anyio.connect_tcp( + remote_host=host, + remote_port=port, + local_host=local_address, + ) + # By default TCP sockets opened in `asyncio` include TCP_NODELAY. + for option in socket_options: + stream._raw_socket.setsockopt(*option) # type: ignore[attr-defined] # pragma: no cover + return AnyIOStream(stream) + + async def connect_unix_socket( + self, + path: str, + timeout: typing.Optional[float] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: # pragma: nocover + if socket_options is None: + socket_options = [] + exc_map = { + TimeoutError: ConnectTimeout, + OSError: ConnectError, + anyio.BrokenResourceError: ConnectError, + } + with map_exceptions(exc_map): + with anyio.fail_after(timeout): + stream: anyio.abc.ByteStream = await anyio.connect_unix(path) + for option in socket_options: + stream._raw_socket.setsockopt(*option) # type: ignore[attr-defined] # pragma: no cover + return AnyIOStream(stream) + + async def sleep(self, seconds: float) -> None: + await anyio.sleep(seconds) # pragma: nocover diff --git a/venv/lib/python3.11/site-packages/httpcore/_backends/auto.py b/venv/lib/python3.11/site-packages/httpcore/_backends/auto.py new file mode 100644 index 0000000..3ac05f4 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_backends/auto.py @@ -0,0 +1,51 @@ +import typing +from typing import Optional + +from .._synchronization import current_async_library +from .base import SOCKET_OPTION, AsyncNetworkBackend, AsyncNetworkStream + + +class AutoBackend(AsyncNetworkBackend): + async def _init_backend(self) -> None: + if not (hasattr(self, "_backend")): + backend = current_async_library() + if backend == "trio": + from .trio import TrioBackend + + self._backend: AsyncNetworkBackend = TrioBackend() + else: + from .anyio import AnyIOBackend + + self._backend = AnyIOBackend() + + async def connect_tcp( + self, + host: str, + port: int, + timeout: Optional[float] = None, + local_address: Optional[str] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: + await self._init_backend() + return await self._backend.connect_tcp( + host, + port, + timeout=timeout, + local_address=local_address, + socket_options=socket_options, + ) + + async def connect_unix_socket( + self, + path: str, + timeout: Optional[float] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: # pragma: nocover + await self._init_backend() + return await self._backend.connect_unix_socket( + path, timeout=timeout, socket_options=socket_options + ) + + async def sleep(self, seconds: float) -> None: # pragma: nocover + await self._init_backend() + return await self._backend.sleep(seconds) diff --git a/venv/lib/python3.11/site-packages/httpcore/_backends/base.py b/venv/lib/python3.11/site-packages/httpcore/_backends/base.py new file mode 100644 index 0000000..6cadedb --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_backends/base.py @@ -0,0 +1,103 @@ +import ssl +import time +import typing + +SOCKET_OPTION = typing.Union[ + typing.Tuple[int, int, int], + typing.Tuple[int, int, typing.Union[bytes, bytearray]], + typing.Tuple[int, int, None, int], +] + + +class NetworkStream: + def read(self, max_bytes: int, timeout: typing.Optional[float] = None) -> bytes: + raise NotImplementedError() # pragma: nocover + + def write(self, buffer: bytes, timeout: typing.Optional[float] = None) -> None: + raise NotImplementedError() # pragma: nocover + + def close(self) -> None: + raise NotImplementedError() # pragma: nocover + + def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: typing.Optional[str] = None, + timeout: typing.Optional[float] = None, + ) -> "NetworkStream": + raise NotImplementedError() # pragma: nocover + + def get_extra_info(self, info: str) -> typing.Any: + return None # pragma: nocover + + +class NetworkBackend: + def connect_tcp( + self, + host: str, + port: int, + timeout: typing.Optional[float] = None, + local_address: typing.Optional[str] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> NetworkStream: + raise NotImplementedError() # pragma: nocover + + def connect_unix_socket( + self, + path: str, + timeout: typing.Optional[float] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> NetworkStream: + raise NotImplementedError() # pragma: nocover + + def sleep(self, seconds: float) -> None: + time.sleep(seconds) # pragma: nocover + + +class AsyncNetworkStream: + async def read( + self, max_bytes: int, timeout: typing.Optional[float] = None + ) -> bytes: + raise NotImplementedError() # pragma: nocover + + async def write( + self, buffer: bytes, timeout: typing.Optional[float] = None + ) -> None: + raise NotImplementedError() # pragma: nocover + + async def aclose(self) -> None: + raise NotImplementedError() # pragma: nocover + + async def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: typing.Optional[str] = None, + timeout: typing.Optional[float] = None, + ) -> "AsyncNetworkStream": + raise NotImplementedError() # pragma: nocover + + def get_extra_info(self, info: str) -> typing.Any: + return None # pragma: nocover + + +class AsyncNetworkBackend: + async def connect_tcp( + self, + host: str, + port: int, + timeout: typing.Optional[float] = None, + local_address: typing.Optional[str] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: + raise NotImplementedError() # pragma: nocover + + async def connect_unix_socket( + self, + path: str, + timeout: typing.Optional[float] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: + raise NotImplementedError() # pragma: nocover + + async def sleep(self, seconds: float) -> None: + raise NotImplementedError() # pragma: nocover diff --git a/venv/lib/python3.11/site-packages/httpcore/_backends/mock.py b/venv/lib/python3.11/site-packages/httpcore/_backends/mock.py new file mode 100644 index 0000000..f7aefeb --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_backends/mock.py @@ -0,0 +1,142 @@ +import ssl +import typing +from typing import Optional + +from .._exceptions import ReadError +from .base import ( + SOCKET_OPTION, + AsyncNetworkBackend, + AsyncNetworkStream, + NetworkBackend, + NetworkStream, +) + + +class MockSSLObject: + def __init__(self, http2: bool): + self._http2 = http2 + + def selected_alpn_protocol(self) -> str: + return "h2" if self._http2 else "http/1.1" + + +class MockStream(NetworkStream): + def __init__(self, buffer: typing.List[bytes], http2: bool = False) -> None: + self._buffer = buffer + self._http2 = http2 + self._closed = False + + def read(self, max_bytes: int, timeout: Optional[float] = None) -> bytes: + if self._closed: + raise ReadError("Connection closed") + if not self._buffer: + return b"" + return self._buffer.pop(0) + + def write(self, buffer: bytes, timeout: Optional[float] = None) -> None: + pass + + def close(self) -> None: + self._closed = True + + def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: Optional[str] = None, + timeout: Optional[float] = None, + ) -> NetworkStream: + return self + + def get_extra_info(self, info: str) -> typing.Any: + return MockSSLObject(http2=self._http2) if info == "ssl_object" else None + + def __repr__(self) -> str: + return "<httpcore.MockStream>" + + +class MockBackend(NetworkBackend): + def __init__(self, buffer: typing.List[bytes], http2: bool = False) -> None: + self._buffer = buffer + self._http2 = http2 + + def connect_tcp( + self, + host: str, + port: int, + timeout: Optional[float] = None, + local_address: Optional[str] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> NetworkStream: + return MockStream(list(self._buffer), http2=self._http2) + + def connect_unix_socket( + self, + path: str, + timeout: Optional[float] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> NetworkStream: + return MockStream(list(self._buffer), http2=self._http2) + + def sleep(self, seconds: float) -> None: + pass + + +class AsyncMockStream(AsyncNetworkStream): + def __init__(self, buffer: typing.List[bytes], http2: bool = False) -> None: + self._buffer = buffer + self._http2 = http2 + self._closed = False + + async def read(self, max_bytes: int, timeout: Optional[float] = None) -> bytes: + if self._closed: + raise ReadError("Connection closed") + if not self._buffer: + return b"" + return self._buffer.pop(0) + + async def write(self, buffer: bytes, timeout: Optional[float] = None) -> None: + pass + + async def aclose(self) -> None: + self._closed = True + + async def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: Optional[str] = None, + timeout: Optional[float] = None, + ) -> AsyncNetworkStream: + return self + + def get_extra_info(self, info: str) -> typing.Any: + return MockSSLObject(http2=self._http2) if info == "ssl_object" else None + + def __repr__(self) -> str: + return "<httpcore.AsyncMockStream>" + + +class AsyncMockBackend(AsyncNetworkBackend): + def __init__(self, buffer: typing.List[bytes], http2: bool = False) -> None: + self._buffer = buffer + self._http2 = http2 + + async def connect_tcp( + self, + host: str, + port: int, + timeout: Optional[float] = None, + local_address: Optional[str] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: + return AsyncMockStream(list(self._buffer), http2=self._http2) + + async def connect_unix_socket( + self, + path: str, + timeout: Optional[float] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: + return AsyncMockStream(list(self._buffer), http2=self._http2) + + async def sleep(self, seconds: float) -> None: + pass diff --git a/venv/lib/python3.11/site-packages/httpcore/_backends/sync.py b/venv/lib/python3.11/site-packages/httpcore/_backends/sync.py new file mode 100644 index 0000000..7b7b417 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_backends/sync.py @@ -0,0 +1,239 @@ +import socket +import ssl +import sys +import typing +from functools import partial + +from .._exceptions import ( + ConnectError, + ConnectTimeout, + ExceptionMapping, + ReadError, + ReadTimeout, + WriteError, + WriteTimeout, + map_exceptions, +) +from .._utils import is_socket_readable +from .base import SOCKET_OPTION, NetworkBackend, NetworkStream + + +class TLSinTLSStream(NetworkStream): # pragma: no cover + """ + Because the standard `SSLContext.wrap_socket` method does + not work for `SSLSocket` objects, we need this class + to implement TLS stream using an underlying `SSLObject` + instance in order to support TLS on top of TLS. + """ + + # Defined in RFC 8449 + TLS_RECORD_SIZE = 16384 + + def __init__( + self, + sock: socket.socket, + ssl_context: ssl.SSLContext, + server_hostname: typing.Optional[str] = None, + timeout: typing.Optional[float] = None, + ): + self._sock = sock + self._incoming = ssl.MemoryBIO() + self._outgoing = ssl.MemoryBIO() + + self.ssl_obj = ssl_context.wrap_bio( + incoming=self._incoming, + outgoing=self._outgoing, + server_hostname=server_hostname, + ) + + self._sock.settimeout(timeout) + self._perform_io(self.ssl_obj.do_handshake) + + def _perform_io( + self, + func: typing.Callable[..., typing.Any], + ) -> typing.Any: + ret = None + + while True: + errno = None + try: + ret = func() + except (ssl.SSLWantReadError, ssl.SSLWantWriteError) as e: + errno = e.errno + + self._sock.sendall(self._outgoing.read()) + + if errno == ssl.SSL_ERROR_WANT_READ: + buf = self._sock.recv(self.TLS_RECORD_SIZE) + + if buf: + self._incoming.write(buf) + else: + self._incoming.write_eof() + if errno is None: + return ret + + def read(self, max_bytes: int, timeout: typing.Optional[float] = None) -> bytes: + exc_map: ExceptionMapping = {socket.timeout: ReadTimeout, OSError: ReadError} + with map_exceptions(exc_map): + self._sock.settimeout(timeout) + return typing.cast( + bytes, self._perform_io(partial(self.ssl_obj.read, max_bytes)) + ) + + def write(self, buffer: bytes, timeout: typing.Optional[float] = None) -> None: + exc_map: ExceptionMapping = {socket.timeout: WriteTimeout, OSError: WriteError} + with map_exceptions(exc_map): + self._sock.settimeout(timeout) + while buffer: + nsent = self._perform_io(partial(self.ssl_obj.write, buffer)) + buffer = buffer[nsent:] + + def close(self) -> None: + self._sock.close() + + def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: typing.Optional[str] = None, + timeout: typing.Optional[float] = None, + ) -> "NetworkStream": + raise NotImplementedError() + + def get_extra_info(self, info: str) -> typing.Any: + if info == "ssl_object": + return self.ssl_obj + if info == "client_addr": + return self._sock.getsockname() + if info == "server_addr": + return self._sock.getpeername() + if info == "socket": + return self._sock + if info == "is_readable": + return is_socket_readable(self._sock) + return None + + +class SyncStream(NetworkStream): + def __init__(self, sock: socket.socket) -> None: + self._sock = sock + + def read(self, max_bytes: int, timeout: typing.Optional[float] = None) -> bytes: + exc_map: ExceptionMapping = {socket.timeout: ReadTimeout, OSError: ReadError} + with map_exceptions(exc_map): + self._sock.settimeout(timeout) + return self._sock.recv(max_bytes) + + def write(self, buffer: bytes, timeout: typing.Optional[float] = None) -> None: + if not buffer: + return + + exc_map: ExceptionMapping = {socket.timeout: WriteTimeout, OSError: WriteError} + with map_exceptions(exc_map): + while buffer: + self._sock.settimeout(timeout) + n = self._sock.send(buffer) + buffer = buffer[n:] + + def close(self) -> None: + self._sock.close() + + def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: typing.Optional[str] = None, + timeout: typing.Optional[float] = None, + ) -> NetworkStream: + exc_map: ExceptionMapping = { + socket.timeout: ConnectTimeout, + OSError: ConnectError, + } + with map_exceptions(exc_map): + try: + if isinstance(self._sock, ssl.SSLSocket): # pragma: no cover + # If the underlying socket has already been upgraded + # to the TLS layer (i.e. is an instance of SSLSocket), + # we need some additional smarts to support TLS-in-TLS. + return TLSinTLSStream( + self._sock, ssl_context, server_hostname, timeout + ) + else: + self._sock.settimeout(timeout) + sock = ssl_context.wrap_socket( + self._sock, server_hostname=server_hostname + ) + except Exception as exc: # pragma: nocover + self.close() + raise exc + return SyncStream(sock) + + def get_extra_info(self, info: str) -> typing.Any: + if info == "ssl_object" and isinstance(self._sock, ssl.SSLSocket): + return self._sock._sslobj # type: ignore + if info == "client_addr": + return self._sock.getsockname() + if info == "server_addr": + return self._sock.getpeername() + if info == "socket": + return self._sock + if info == "is_readable": + return is_socket_readable(self._sock) + return None + + +class SyncBackend(NetworkBackend): + def connect_tcp( + self, + host: str, + port: int, + timeout: typing.Optional[float] = None, + local_address: typing.Optional[str] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> NetworkStream: + # Note that we automatically include `TCP_NODELAY` + # in addition to any other custom socket options. + if socket_options is None: + socket_options = [] # pragma: no cover + address = (host, port) + source_address = None if local_address is None else (local_address, 0) + exc_map: ExceptionMapping = { + socket.timeout: ConnectTimeout, + OSError: ConnectError, + } + + with map_exceptions(exc_map): + sock = socket.create_connection( + address, + timeout, + source_address=source_address, + ) + for option in socket_options: + sock.setsockopt(*option) # pragma: no cover + sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1) + return SyncStream(sock) + + def connect_unix_socket( + self, + path: str, + timeout: typing.Optional[float] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> NetworkStream: # pragma: nocover + if sys.platform == "win32": + raise RuntimeError( + "Attempted to connect to a UNIX socket on a Windows system." + ) + if socket_options is None: + socket_options = [] + + exc_map: ExceptionMapping = { + socket.timeout: ConnectTimeout, + OSError: ConnectError, + } + with map_exceptions(exc_map): + sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) + for option in socket_options: + sock.setsockopt(*option) + sock.settimeout(timeout) + sock.connect(path) + return SyncStream(sock) diff --git a/venv/lib/python3.11/site-packages/httpcore/_backends/trio.py b/venv/lib/python3.11/site-packages/httpcore/_backends/trio.py new file mode 100644 index 0000000..b1626d2 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_backends/trio.py @@ -0,0 +1,161 @@ +import ssl +import typing + +import trio + +from .._exceptions import ( + ConnectError, + ConnectTimeout, + ExceptionMapping, + ReadError, + ReadTimeout, + WriteError, + WriteTimeout, + map_exceptions, +) +from .base import SOCKET_OPTION, AsyncNetworkBackend, AsyncNetworkStream + + +class TrioStream(AsyncNetworkStream): + def __init__(self, stream: trio.abc.Stream) -> None: + self._stream = stream + + async def read( + self, max_bytes: int, timeout: typing.Optional[float] = None + ) -> bytes: + timeout_or_inf = float("inf") if timeout is None else timeout + exc_map: ExceptionMapping = { + trio.TooSlowError: ReadTimeout, + trio.BrokenResourceError: ReadError, + trio.ClosedResourceError: ReadError, + } + with map_exceptions(exc_map): + with trio.fail_after(timeout_or_inf): + data: bytes = await self._stream.receive_some(max_bytes=max_bytes) + return data + + async def write( + self, buffer: bytes, timeout: typing.Optional[float] = None + ) -> None: + if not buffer: + return + + timeout_or_inf = float("inf") if timeout is None else timeout + exc_map: ExceptionMapping = { + trio.TooSlowError: WriteTimeout, + trio.BrokenResourceError: WriteError, + trio.ClosedResourceError: WriteError, + } + with map_exceptions(exc_map): + with trio.fail_after(timeout_or_inf): + await self._stream.send_all(data=buffer) + + async def aclose(self) -> None: + await self._stream.aclose() + + async def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: typing.Optional[str] = None, + timeout: typing.Optional[float] = None, + ) -> AsyncNetworkStream: + timeout_or_inf = float("inf") if timeout is None else timeout + exc_map: ExceptionMapping = { + trio.TooSlowError: ConnectTimeout, + trio.BrokenResourceError: ConnectError, + } + ssl_stream = trio.SSLStream( + self._stream, + ssl_context=ssl_context, + server_hostname=server_hostname, + https_compatible=True, + server_side=False, + ) + with map_exceptions(exc_map): + try: + with trio.fail_after(timeout_or_inf): + await ssl_stream.do_handshake() + except Exception as exc: # pragma: nocover + await self.aclose() + raise exc + return TrioStream(ssl_stream) + + def get_extra_info(self, info: str) -> typing.Any: + if info == "ssl_object" and isinstance(self._stream, trio.SSLStream): + # Type checkers cannot see `_ssl_object` attribute because trio._ssl.SSLStream uses __getattr__/__setattr__. + # Tracked at https://github.com/python-trio/trio/issues/542 + return self._stream._ssl_object # type: ignore[attr-defined] + if info == "client_addr": + return self._get_socket_stream().socket.getsockname() + if info == "server_addr": + return self._get_socket_stream().socket.getpeername() + if info == "socket": + stream = self._stream + while isinstance(stream, trio.SSLStream): + stream = stream.transport_stream + assert isinstance(stream, trio.SocketStream) + return stream.socket + if info == "is_readable": + socket = self.get_extra_info("socket") + return socket.is_readable() + return None + + def _get_socket_stream(self) -> trio.SocketStream: + stream = self._stream + while isinstance(stream, trio.SSLStream): + stream = stream.transport_stream + assert isinstance(stream, trio.SocketStream) + return stream + + +class TrioBackend(AsyncNetworkBackend): + async def connect_tcp( + self, + host: str, + port: int, + timeout: typing.Optional[float] = None, + local_address: typing.Optional[str] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: + # By default for TCP sockets, trio enables TCP_NODELAY. + # https://trio.readthedocs.io/en/stable/reference-io.html#trio.SocketStream + if socket_options is None: + socket_options = [] # pragma: no cover + timeout_or_inf = float("inf") if timeout is None else timeout + exc_map: ExceptionMapping = { + trio.TooSlowError: ConnectTimeout, + trio.BrokenResourceError: ConnectError, + OSError: ConnectError, + } + with map_exceptions(exc_map): + with trio.fail_after(timeout_or_inf): + stream: trio.abc.Stream = await trio.open_tcp_stream( + host=host, port=port, local_address=local_address + ) + for option in socket_options: + stream.setsockopt(*option) # type: ignore[attr-defined] # pragma: no cover + return TrioStream(stream) + + async def connect_unix_socket( + self, + path: str, + timeout: typing.Optional[float] = None, + socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None, + ) -> AsyncNetworkStream: # pragma: nocover + if socket_options is None: + socket_options = [] + timeout_or_inf = float("inf") if timeout is None else timeout + exc_map: ExceptionMapping = { + trio.TooSlowError: ConnectTimeout, + trio.BrokenResourceError: ConnectError, + OSError: ConnectError, + } + with map_exceptions(exc_map): + with trio.fail_after(timeout_or_inf): + stream: trio.abc.Stream = await trio.open_unix_socket(path) + for option in socket_options: + stream.setsockopt(*option) # type: ignore[attr-defined] # pragma: no cover + return TrioStream(stream) + + async def sleep(self, seconds: float) -> None: + await trio.sleep(seconds) # pragma: nocover diff --git a/venv/lib/python3.11/site-packages/httpcore/_exceptions.py b/venv/lib/python3.11/site-packages/httpcore/_exceptions.py new file mode 100644 index 0000000..81e7fc6 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_exceptions.py @@ -0,0 +1,81 @@ +import contextlib +from typing import Iterator, Mapping, Type + +ExceptionMapping = Mapping[Type[Exception], Type[Exception]] + + +@contextlib.contextmanager +def map_exceptions(map: ExceptionMapping) -> Iterator[None]: + try: + yield + except Exception as exc: # noqa: PIE786 + for from_exc, to_exc in map.items(): + if isinstance(exc, from_exc): + raise to_exc(exc) from exc + raise # pragma: nocover + + +class ConnectionNotAvailable(Exception): + pass + + +class ProxyError(Exception): + pass + + +class UnsupportedProtocol(Exception): + pass + + +class ProtocolError(Exception): + pass + + +class RemoteProtocolError(ProtocolError): + pass + + +class LocalProtocolError(ProtocolError): + pass + + +# Timeout errors + + +class TimeoutException(Exception): + pass + + +class PoolTimeout(TimeoutException): + pass + + +class ConnectTimeout(TimeoutException): + pass + + +class ReadTimeout(TimeoutException): + pass + + +class WriteTimeout(TimeoutException): + pass + + +# Network errors + + +class NetworkError(Exception): + pass + + +class ConnectError(NetworkError): + pass + + +class ReadError(NetworkError): + pass + + +class WriteError(NetworkError): + pass diff --git a/venv/lib/python3.11/site-packages/httpcore/_models.py b/venv/lib/python3.11/site-packages/httpcore/_models.py new file mode 100644 index 0000000..dadee79 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_models.py @@ -0,0 +1,492 @@ +from typing import ( + Any, + AsyncIterable, + AsyncIterator, + Iterable, + Iterator, + List, + Mapping, + MutableMapping, + Optional, + Sequence, + Tuple, + Union, +) +from urllib.parse import urlparse + +# Functions for typechecking... + + +HeadersAsSequence = Sequence[Tuple[Union[bytes, str], Union[bytes, str]]] +HeadersAsMapping = Mapping[Union[bytes, str], Union[bytes, str]] +HeaderTypes = Union[HeadersAsSequence, HeadersAsMapping, None] + +Extensions = MutableMapping[str, Any] + + +def enforce_bytes(value: Union[bytes, str], *, name: str) -> bytes: + """ + Any arguments that are ultimately represented as bytes can be specified + either as bytes or as strings. + + However we enforce that any string arguments must only contain characters in + the plain ASCII range. chr(0)...chr(127). If you need to use characters + outside that range then be precise, and use a byte-wise argument. + """ + if isinstance(value, str): + try: + return value.encode("ascii") + except UnicodeEncodeError: + raise TypeError(f"{name} strings may not include unicode characters.") + elif isinstance(value, bytes): + return value + + seen_type = type(value).__name__ + raise TypeError(f"{name} must be bytes or str, but got {seen_type}.") + + +def enforce_url(value: Union["URL", bytes, str], *, name: str) -> "URL": + """ + Type check for URL parameters. + """ + if isinstance(value, (bytes, str)): + return URL(value) + elif isinstance(value, URL): + return value + + seen_type = type(value).__name__ + raise TypeError(f"{name} must be a URL, bytes, or str, but got {seen_type}.") + + +def enforce_headers( + value: Union[HeadersAsMapping, HeadersAsSequence, None] = None, *, name: str +) -> List[Tuple[bytes, bytes]]: + """ + Convienence function that ensure all items in request or response headers + are either bytes or strings in the plain ASCII range. + """ + if value is None: + return [] + elif isinstance(value, Mapping): + return [ + ( + enforce_bytes(k, name="header name"), + enforce_bytes(v, name="header value"), + ) + for k, v in value.items() + ] + elif isinstance(value, Sequence): + return [ + ( + enforce_bytes(k, name="header name"), + enforce_bytes(v, name="header value"), + ) + for k, v in value + ] + + seen_type = type(value).__name__ + raise TypeError( + f"{name} must be a mapping or sequence of two-tuples, but got {seen_type}." + ) + + +def enforce_stream( + value: Union[bytes, Iterable[bytes], AsyncIterable[bytes], None], *, name: str +) -> Union[Iterable[bytes], AsyncIterable[bytes]]: + if value is None: + return ByteStream(b"") + elif isinstance(value, bytes): + return ByteStream(value) + return value + + +# * https://tools.ietf.org/html/rfc3986#section-3.2.3 +# * https://url.spec.whatwg.org/#url-miscellaneous +# * https://url.spec.whatwg.org/#scheme-state +DEFAULT_PORTS = { + b"ftp": 21, + b"http": 80, + b"https": 443, + b"ws": 80, + b"wss": 443, +} + + +def include_request_headers( + headers: List[Tuple[bytes, bytes]], + *, + url: "URL", + content: Union[None, bytes, Iterable[bytes], AsyncIterable[bytes]], +) -> List[Tuple[bytes, bytes]]: + headers_set = set(k.lower() for k, v in headers) + + if b"host" not in headers_set: + default_port = DEFAULT_PORTS.get(url.scheme) + if url.port is None or url.port == default_port: + header_value = url.host + else: + header_value = b"%b:%d" % (url.host, url.port) + headers = [(b"Host", header_value)] + headers + + if ( + content is not None + and b"content-length" not in headers_set + and b"transfer-encoding" not in headers_set + ): + if isinstance(content, bytes): + content_length = str(len(content)).encode("ascii") + headers += [(b"Content-Length", content_length)] + else: + headers += [(b"Transfer-Encoding", b"chunked")] # pragma: nocover + + return headers + + +# Interfaces for byte streams... + + +class ByteStream: + """ + A container for non-streaming content, and that supports both sync and async + stream iteration. + """ + + def __init__(self, content: bytes) -> None: + self._content = content + + def __iter__(self) -> Iterator[bytes]: + yield self._content + + async def __aiter__(self) -> AsyncIterator[bytes]: + yield self._content + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{len(self._content)} bytes]>" + + +class Origin: + def __init__(self, scheme: bytes, host: bytes, port: int) -> None: + self.scheme = scheme + self.host = host + self.port = port + + def __eq__(self, other: Any) -> bool: + return ( + isinstance(other, Origin) + and self.scheme == other.scheme + and self.host == other.host + and self.port == other.port + ) + + def __str__(self) -> str: + scheme = self.scheme.decode("ascii") + host = self.host.decode("ascii") + port = str(self.port) + return f"{scheme}://{host}:{port}" + + +class URL: + """ + Represents the URL against which an HTTP request may be made. + + The URL may either be specified as a plain string, for convienence: + + ```python + url = httpcore.URL("https://www.example.com/") + ``` + + Or be constructed with explicitily pre-parsed components: + + ```python + url = httpcore.URL(scheme=b'https', host=b'www.example.com', port=None, target=b'/') + ``` + + Using this second more explicit style allows integrations that are using + `httpcore` to pass through URLs that have already been parsed in order to use + libraries such as `rfc-3986` rather than relying on the stdlib. It also ensures + that URL parsing is treated identically at both the networking level and at any + higher layers of abstraction. + + The four components are important here, as they allow the URL to be precisely + specified in a pre-parsed format. They also allow certain types of request to + be created that could not otherwise be expressed. + + For example, an HTTP request to `http://www.example.com/` forwarded via a proxy + at `http://localhost:8080`... + + ```python + # Constructs an HTTP request with a complete URL as the target: + # GET https://www.example.com/ HTTP/1.1 + url = httpcore.URL( + scheme=b'http', + host=b'localhost', + port=8080, + target=b'https://www.example.com/' + ) + request = httpcore.Request( + method="GET", + url=url + ) + ``` + + Another example is constructing an `OPTIONS *` request... + + ```python + # Constructs an 'OPTIONS *' HTTP request: + # OPTIONS * HTTP/1.1 + url = httpcore.URL(scheme=b'https', host=b'www.example.com', target=b'*') + request = httpcore.Request(method="OPTIONS", url=url) + ``` + + This kind of request is not possible to formulate with a URL string, + because the `/` delimiter is always used to demark the target from the + host/port portion of the URL. + + For convenience, string-like arguments may be specified either as strings or + as bytes. However, once a request is being issue over-the-wire, the URL + components are always ultimately required to be a bytewise representation. + + In order to avoid any ambiguity over character encodings, when strings are used + as arguments, they must be strictly limited to the ASCII range `chr(0)`-`chr(127)`. + If you require a bytewise representation that is outside this range you must + handle the character encoding directly, and pass a bytes instance. + """ + + def __init__( + self, + url: Union[bytes, str] = "", + *, + scheme: Union[bytes, str] = b"", + host: Union[bytes, str] = b"", + port: Optional[int] = None, + target: Union[bytes, str] = b"", + ) -> None: + """ + Parameters: + url: The complete URL as a string or bytes. + scheme: The URL scheme as a string or bytes. + Typically either `"http"` or `"https"`. + host: The URL host as a string or bytes. Such as `"www.example.com"`. + port: The port to connect to. Either an integer or `None`. + target: The target of the HTTP request. Such as `"/items?search=red"`. + """ + if url: + parsed = urlparse(enforce_bytes(url, name="url")) + self.scheme = parsed.scheme + self.host = parsed.hostname or b"" + self.port = parsed.port + self.target = (parsed.path or b"/") + ( + b"?" + parsed.query if parsed.query else b"" + ) + else: + self.scheme = enforce_bytes(scheme, name="scheme") + self.host = enforce_bytes(host, name="host") + self.port = port + self.target = enforce_bytes(target, name="target") + + @property + def origin(self) -> Origin: + default_port = { + b"http": 80, + b"https": 443, + b"ws": 80, + b"wss": 443, + b"socks5": 1080, + }[self.scheme] + return Origin( + scheme=self.scheme, host=self.host, port=self.port or default_port + ) + + def __eq__(self, other: Any) -> bool: + return ( + isinstance(other, URL) + and other.scheme == self.scheme + and other.host == self.host + and other.port == self.port + and other.target == self.target + ) + + def __bytes__(self) -> bytes: + if self.port is None: + return b"%b://%b%b" % (self.scheme, self.host, self.target) + return b"%b://%b:%d%b" % (self.scheme, self.host, self.port, self.target) + + def __repr__(self) -> str: + return ( + f"{self.__class__.__name__}(scheme={self.scheme!r}, " + f"host={self.host!r}, port={self.port!r}, target={self.target!r})" + ) + + +class Request: + """ + An HTTP request. + """ + + def __init__( + self, + method: Union[bytes, str], + url: Union[URL, bytes, str], + *, + headers: HeaderTypes = None, + content: Union[bytes, Iterable[bytes], AsyncIterable[bytes], None] = None, + extensions: Optional[Extensions] = None, + ) -> None: + """ + Parameters: + method: The HTTP request method, either as a string or bytes. + For example: `GET`. + url: The request URL, either as a `URL` instance, or as a string or bytes. + For example: `"https://www.example.com".` + headers: The HTTP request headers. + content: The content of the request body. + extensions: A dictionary of optional extra information included on + the request. Possible keys include `"timeout"`, and `"trace"`. + """ + self.method: bytes = enforce_bytes(method, name="method") + self.url: URL = enforce_url(url, name="url") + self.headers: List[Tuple[bytes, bytes]] = enforce_headers( + headers, name="headers" + ) + self.stream: Union[Iterable[bytes], AsyncIterable[bytes]] = enforce_stream( + content, name="content" + ) + self.extensions = {} if extensions is None else extensions + + if "target" in self.extensions: + self.url = URL( + scheme=self.url.scheme, + host=self.url.host, + port=self.url.port, + target=self.extensions["target"], + ) + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.method!r}]>" + + +class Response: + """ + An HTTP response. + """ + + def __init__( + self, + status: int, + *, + headers: HeaderTypes = None, + content: Union[bytes, Iterable[bytes], AsyncIterable[bytes], None] = None, + extensions: Optional[Extensions] = None, + ) -> None: + """ + Parameters: + status: The HTTP status code of the response. For example `200`. + headers: The HTTP response headers. + content: The content of the response body. + extensions: A dictionary of optional extra information included on + the responseself.Possible keys include `"http_version"`, + `"reason_phrase"`, and `"network_stream"`. + """ + self.status: int = status + self.headers: List[Tuple[bytes, bytes]] = enforce_headers( + headers, name="headers" + ) + self.stream: Union[Iterable[bytes], AsyncIterable[bytes]] = enforce_stream( + content, name="content" + ) + self.extensions = {} if extensions is None else extensions + + self._stream_consumed = False + + @property + def content(self) -> bytes: + if not hasattr(self, "_content"): + if isinstance(self.stream, Iterable): + raise RuntimeError( + "Attempted to access 'response.content' on a streaming response. " + "Call 'response.read()' first." + ) + else: + raise RuntimeError( + "Attempted to access 'response.content' on a streaming response. " + "Call 'await response.aread()' first." + ) + return self._content + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.status}]>" + + # Sync interface... + + def read(self) -> bytes: + if not isinstance(self.stream, Iterable): # pragma: nocover + raise RuntimeError( + "Attempted to read an asynchronous response using 'response.read()'. " + "You should use 'await response.aread()' instead." + ) + if not hasattr(self, "_content"): + self._content = b"".join([part for part in self.iter_stream()]) + return self._content + + def iter_stream(self) -> Iterator[bytes]: + if not isinstance(self.stream, Iterable): # pragma: nocover + raise RuntimeError( + "Attempted to stream an asynchronous response using 'for ... in " + "response.iter_stream()'. " + "You should use 'async for ... in response.aiter_stream()' instead." + ) + if self._stream_consumed: + raise RuntimeError( + "Attempted to call 'for ... in response.iter_stream()' more than once." + ) + self._stream_consumed = True + for chunk in self.stream: + yield chunk + + def close(self) -> None: + if not isinstance(self.stream, Iterable): # pragma: nocover + raise RuntimeError( + "Attempted to close an asynchronous response using 'response.close()'. " + "You should use 'await response.aclose()' instead." + ) + if hasattr(self.stream, "close"): + self.stream.close() + + # Async interface... + + async def aread(self) -> bytes: + if not isinstance(self.stream, AsyncIterable): # pragma: nocover + raise RuntimeError( + "Attempted to read an synchronous response using " + "'await response.aread()'. " + "You should use 'response.read()' instead." + ) + if not hasattr(self, "_content"): + self._content = b"".join([part async for part in self.aiter_stream()]) + return self._content + + async def aiter_stream(self) -> AsyncIterator[bytes]: + if not isinstance(self.stream, AsyncIterable): # pragma: nocover + raise RuntimeError( + "Attempted to stream an synchronous response using 'async for ... in " + "response.aiter_stream()'. " + "You should use 'for ... in response.iter_stream()' instead." + ) + if self._stream_consumed: + raise RuntimeError( + "Attempted to call 'async for ... in response.aiter_stream()' " + "more than once." + ) + self._stream_consumed = True + async for chunk in self.stream: + yield chunk + + async def aclose(self) -> None: + if not isinstance(self.stream, AsyncIterable): # pragma: nocover + raise RuntimeError( + "Attempted to close a synchronous response using " + "'await response.aclose()'. " + "You should use 'response.close()' instead." + ) + if hasattr(self.stream, "aclose"): + await self.stream.aclose() diff --git a/venv/lib/python3.11/site-packages/httpcore/_ssl.py b/venv/lib/python3.11/site-packages/httpcore/_ssl.py new file mode 100644 index 0000000..c99c5a6 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_ssl.py @@ -0,0 +1,9 @@ +import ssl + +import certifi + + +def default_ssl_context() -> ssl.SSLContext: + context = ssl.create_default_context() + context.load_verify_locations(certifi.where()) + return context diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/__init__.py b/venv/lib/python3.11/site-packages/httpcore/_sync/__init__.py new file mode 100644 index 0000000..b476d76 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/__init__.py @@ -0,0 +1,39 @@ +from .connection import HTTPConnection +from .connection_pool import ConnectionPool +from .http11 import HTTP11Connection +from .http_proxy import HTTPProxy +from .interfaces import ConnectionInterface + +try: + from .http2 import HTTP2Connection +except ImportError: # pragma: nocover + + class HTTP2Connection: # type: ignore + def __init__(self, *args, **kwargs) -> None: # type: ignore + raise RuntimeError( + "Attempted to use http2 support, but the `h2` package is not " + "installed. Use 'pip install httpcore[http2]'." + ) + + +try: + from .socks_proxy import SOCKSProxy +except ImportError: # pragma: nocover + + class SOCKSProxy: # type: ignore + def __init__(self, *args, **kwargs) -> None: # type: ignore + raise RuntimeError( + "Attempted to use SOCKS support, but the `socksio` package is not " + "installed. Use 'pip install httpcore[socks]'." + ) + + +__all__ = [ + "HTTPConnection", + "ConnectionPool", + "HTTPProxy", + "HTTP11Connection", + "HTTP2Connection", + "ConnectionInterface", + "SOCKSProxy", +] diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/__init__.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/__init__.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..8a7c9c6 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/__init__.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/connection.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/connection.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..db1e935 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/connection.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/connection_pool.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/connection_pool.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..f89df16 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/connection_pool.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/http11.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/http11.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..9a458d9 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/http11.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/http2.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/http2.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..8f66a4c --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/http2.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/http_proxy.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/http_proxy.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..9279192 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/http_proxy.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/interfaces.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/interfaces.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..8941591 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/interfaces.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/socks_proxy.cpython-311.pyc b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/socks_proxy.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..ceff01e --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/__pycache__/socks_proxy.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/connection.py b/venv/lib/python3.11/site-packages/httpcore/_sync/connection.py new file mode 100644 index 0000000..c3890f3 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/connection.py @@ -0,0 +1,220 @@ +import itertools +import logging +import ssl +from types import TracebackType +from typing import Iterable, Iterator, Optional, Type + +from .._backends.sync import SyncBackend +from .._backends.base import SOCKET_OPTION, NetworkBackend, NetworkStream +from .._exceptions import ConnectError, ConnectTimeout +from .._models import Origin, Request, Response +from .._ssl import default_ssl_context +from .._synchronization import Lock +from .._trace import Trace +from .http11 import HTTP11Connection +from .interfaces import ConnectionInterface + +RETRIES_BACKOFF_FACTOR = 0.5 # 0s, 0.5s, 1s, 2s, 4s, etc. + + +logger = logging.getLogger("httpcore.connection") + + +def exponential_backoff(factor: float) -> Iterator[float]: + """ + Generate a geometric sequence that has a ratio of 2 and starts with 0. + + For example: + - `factor = 2`: `0, 2, 4, 8, 16, 32, 64, ...` + - `factor = 3`: `0, 3, 6, 12, 24, 48, 96, ...` + """ + yield 0 + for n in itertools.count(): + yield factor * 2**n + + +class HTTPConnection(ConnectionInterface): + def __init__( + self, + origin: Origin, + ssl_context: Optional[ssl.SSLContext] = None, + keepalive_expiry: Optional[float] = None, + http1: bool = True, + http2: bool = False, + retries: int = 0, + local_address: Optional[str] = None, + uds: Optional[str] = None, + network_backend: Optional[NetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + ) -> None: + self._origin = origin + self._ssl_context = ssl_context + self._keepalive_expiry = keepalive_expiry + self._http1 = http1 + self._http2 = http2 + self._retries = retries + self._local_address = local_address + self._uds = uds + + self._network_backend: NetworkBackend = ( + SyncBackend() if network_backend is None else network_backend + ) + self._connection: Optional[ConnectionInterface] = None + self._connect_failed: bool = False + self._request_lock = Lock() + self._socket_options = socket_options + + def handle_request(self, request: Request) -> Response: + if not self.can_handle_request(request.url.origin): + raise RuntimeError( + f"Attempted to send request to {request.url.origin} on connection to {self._origin}" + ) + + try: + with self._request_lock: + if self._connection is None: + stream = self._connect(request) + + ssl_object = stream.get_extra_info("ssl_object") + http2_negotiated = ( + ssl_object is not None + and ssl_object.selected_alpn_protocol() == "h2" + ) + if http2_negotiated or (self._http2 and not self._http1): + from .http2 import HTTP2Connection + + self._connection = HTTP2Connection( + origin=self._origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + else: + self._connection = HTTP11Connection( + origin=self._origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + except BaseException as exc: + self._connect_failed = True + raise exc + + return self._connection.handle_request(request) + + def _connect(self, request: Request) -> NetworkStream: + timeouts = request.extensions.get("timeout", {}) + sni_hostname = request.extensions.get("sni_hostname", None) + timeout = timeouts.get("connect", None) + + retries_left = self._retries + delays = exponential_backoff(factor=RETRIES_BACKOFF_FACTOR) + + while True: + try: + if self._uds is None: + kwargs = { + "host": self._origin.host.decode("ascii"), + "port": self._origin.port, + "local_address": self._local_address, + "timeout": timeout, + "socket_options": self._socket_options, + } + with Trace("connect_tcp", logger, request, kwargs) as trace: + stream = self._network_backend.connect_tcp(**kwargs) + trace.return_value = stream + else: + kwargs = { + "path": self._uds, + "timeout": timeout, + "socket_options": self._socket_options, + } + with Trace( + "connect_unix_socket", logger, request, kwargs + ) as trace: + stream = self._network_backend.connect_unix_socket( + **kwargs + ) + trace.return_value = stream + + if self._origin.scheme in (b"https", b"wss"): + ssl_context = ( + default_ssl_context() + if self._ssl_context is None + else self._ssl_context + ) + alpn_protocols = ["http/1.1", "h2"] if self._http2 else ["http/1.1"] + ssl_context.set_alpn_protocols(alpn_protocols) + + kwargs = { + "ssl_context": ssl_context, + "server_hostname": sni_hostname + or self._origin.host.decode("ascii"), + "timeout": timeout, + } + with Trace("start_tls", logger, request, kwargs) as trace: + stream = stream.start_tls(**kwargs) + trace.return_value = stream + return stream + except (ConnectError, ConnectTimeout): + if retries_left <= 0: + raise + retries_left -= 1 + delay = next(delays) + with Trace("retry", logger, request, kwargs) as trace: + self._network_backend.sleep(delay) + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._origin + + def close(self) -> None: + if self._connection is not None: + with Trace("close", logger, None, {}): + self._connection.close() + + def is_available(self) -> bool: + if self._connection is None: + # If HTTP/2 support is enabled, and the resulting connection could + # end up as HTTP/2 then we should indicate the connection as being + # available to service multiple requests. + return ( + self._http2 + and (self._origin.scheme == b"https" or not self._http1) + and not self._connect_failed + ) + return self._connection.is_available() + + def has_expired(self) -> bool: + if self._connection is None: + return self._connect_failed + return self._connection.has_expired() + + def is_idle(self) -> bool: + if self._connection is None: + return self._connect_failed + return self._connection.is_idle() + + def is_closed(self) -> bool: + if self._connection is None: + return self._connect_failed + return self._connection.is_closed() + + def info(self) -> str: + if self._connection is None: + return "CONNECTION FAILED" if self._connect_failed else "CONNECTING" + return self._connection.info() + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.info()}]>" + + # These context managers are not used in the standard flow, but are + # useful for testing or working with connection instances directly. + + def __enter__(self) -> "HTTPConnection": + return self + + def __exit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + self.close() diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/connection_pool.py b/venv/lib/python3.11/site-packages/httpcore/_sync/connection_pool.py new file mode 100644 index 0000000..8dcf348 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/connection_pool.py @@ -0,0 +1,380 @@ +import ssl +import sys +from types import TracebackType +from typing import Iterable, Iterator, Iterable, List, Optional, Type + +from .._backends.sync import SyncBackend +from .._backends.base import SOCKET_OPTION, NetworkBackend +from .._exceptions import ConnectionNotAvailable, UnsupportedProtocol +from .._models import Origin, Request, Response +from .._synchronization import Event, ShieldCancellation, ThreadLock +from .connection import HTTPConnection +from .interfaces import ConnectionInterface, RequestInterface + + +class PoolRequest: + def __init__(self, request: Request) -> None: + self.request = request + self.connection: Optional[ConnectionInterface] = None + self._connection_acquired = Event() + + def assign_to_connection( + self, connection: Optional[ConnectionInterface] + ) -> None: + self.connection = connection + self._connection_acquired.set() + + def clear_connection(self) -> None: + self.connection = None + self._connection_acquired = Event() + + def wait_for_connection( + self, timeout: Optional[float] = None + ) -> ConnectionInterface: + if self.connection is None: + self._connection_acquired.wait(timeout=timeout) + assert self.connection is not None + return self.connection + + def is_queued(self) -> bool: + return self.connection is None + + +class ConnectionPool(RequestInterface): + """ + A connection pool for making HTTP requests. + """ + + def __init__( + self, + ssl_context: Optional[ssl.SSLContext] = None, + max_connections: Optional[int] = 10, + max_keepalive_connections: Optional[int] = None, + keepalive_expiry: Optional[float] = None, + http1: bool = True, + http2: bool = False, + retries: int = 0, + local_address: Optional[str] = None, + uds: Optional[str] = None, + network_backend: Optional[NetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + ) -> None: + """ + A connection pool for making HTTP requests. + + Parameters: + ssl_context: An SSL context to use for verifying connections. + If not specified, the default `httpcore.default_ssl_context()` + will be used. + max_connections: The maximum number of concurrent HTTP connections that + the pool should allow. Any attempt to send a request on a pool that + would exceed this amount will block until a connection is available. + max_keepalive_connections: The maximum number of idle HTTP connections + that will be maintained in the pool. + keepalive_expiry: The duration in seconds that an idle HTTP connection + may be maintained for before being expired from the pool. + http1: A boolean indicating if HTTP/1.1 requests should be supported + by the connection pool. Defaults to True. + http2: A boolean indicating if HTTP/2 requests should be supported by + the connection pool. Defaults to False. + retries: The maximum number of retries when trying to establish a + connection. + local_address: Local address to connect from. Can also be used to connect + using a particular address family. Using `local_address="0.0.0.0"` + will connect using an `AF_INET` address (IPv4), while using + `local_address="::"` will connect using an `AF_INET6` address (IPv6). + uds: Path to a Unix Domain Socket to use instead of TCP sockets. + network_backend: A backend instance to use for handling network I/O. + socket_options: Socket options that have to be included + in the TCP socket when the connection was established. + """ + self._ssl_context = ssl_context + + self._max_connections = ( + sys.maxsize if max_connections is None else max_connections + ) + self._max_keepalive_connections = ( + sys.maxsize + if max_keepalive_connections is None + else max_keepalive_connections + ) + self._max_keepalive_connections = min( + self._max_connections, self._max_keepalive_connections + ) + + self._keepalive_expiry = keepalive_expiry + self._http1 = http1 + self._http2 = http2 + self._retries = retries + self._local_address = local_address + self._uds = uds + + self._network_backend = ( + SyncBackend() if network_backend is None else network_backend + ) + self._socket_options = socket_options + + # The mutable state on a connection pool is the queue of incoming requests, + # and the set of connections that are servicing those requests. + self._connections: List[ConnectionInterface] = [] + self._requests: List[PoolRequest] = [] + + # We only mutate the state of the connection pool within an 'optional_thread_lock' + # context. This holds a threading lock unless we're running in async mode, + # in which case it is a no-op. + self._optional_thread_lock = ThreadLock() + + def create_connection(self, origin: Origin) -> ConnectionInterface: + return HTTPConnection( + origin=origin, + ssl_context=self._ssl_context, + keepalive_expiry=self._keepalive_expiry, + http1=self._http1, + http2=self._http2, + retries=self._retries, + local_address=self._local_address, + uds=self._uds, + network_backend=self._network_backend, + socket_options=self._socket_options, + ) + + @property + def connections(self) -> List[ConnectionInterface]: + """ + Return a list of the connections currently in the pool. + + For example: + + ```python + >>> pool.connections + [ + <HTTPConnection ['https://example.com:443', HTTP/1.1, ACTIVE, Request Count: 6]>, + <HTTPConnection ['https://example.com:443', HTTP/1.1, IDLE, Request Count: 9]> , + <HTTPConnection ['http://example.com:80', HTTP/1.1, IDLE, Request Count: 1]>, + ] + ``` + """ + return list(self._connections) + + def handle_request(self, request: Request) -> Response: + """ + Send an HTTP request, and return an HTTP response. + + This is the core implementation that is called into by `.request()` or `.stream()`. + """ + scheme = request.url.scheme.decode() + if scheme == "": + raise UnsupportedProtocol( + "Request URL is missing an 'http://' or 'https://' protocol." + ) + if scheme not in ("http", "https", "ws", "wss"): + raise UnsupportedProtocol( + f"Request URL has an unsupported protocol '{scheme}://'." + ) + + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("pool", None) + + with self._optional_thread_lock: + # Add the incoming request to our request queue. + pool_request = PoolRequest(request) + self._requests.append(pool_request) + + try: + while True: + with self._optional_thread_lock: + # Assign incoming requests to available connections, + # closing or creating new connections as required. + closing = self._assign_requests_to_connections() + self._close_connections(closing) + + # Wait until this request has an assigned connection. + connection = pool_request.wait_for_connection(timeout=timeout) + + try: + # Send the request on the assigned connection. + response = connection.handle_request( + pool_request.request + ) + except ConnectionNotAvailable: + # In some cases a connection may initially be available to + # handle a request, but then become unavailable. + # + # In this case we clear the connection and try again. + pool_request.clear_connection() + else: + break # pragma: nocover + + except BaseException as exc: + with self._optional_thread_lock: + # For any exception or cancellation we remove the request from + # the queue, and then re-assign requests to connections. + self._requests.remove(pool_request) + closing = self._assign_requests_to_connections() + + self._close_connections(closing) + raise exc from None + + # Return the response. Note that in this case we still have to manage + # the point at which the response is closed. + assert isinstance(response.stream, Iterable) + return Response( + status=response.status, + headers=response.headers, + content=PoolByteStream( + stream=response.stream, pool_request=pool_request, pool=self + ), + extensions=response.extensions, + ) + + def _assign_requests_to_connections(self) -> List[ConnectionInterface]: + """ + Manage the state of the connection pool, assigning incoming + requests to connections as available. + + Called whenever a new request is added or removed from the pool. + + Any closing connections are returned, allowing the I/O for closing + those connections to be handled seperately. + """ + closing_connections = [] + + # First we handle cleaning up any connections that are closed, + # have expired their keep-alive, or surplus idle connections. + for connection in list(self._connections): + if connection.is_closed(): + # log: "removing closed connection" + self._connections.remove(connection) + elif connection.has_expired(): + # log: "closing expired connection" + self._connections.remove(connection) + closing_connections.append(connection) + elif ( + connection.is_idle() + and len([connection.is_idle() for connection in self._connections]) + > self._max_keepalive_connections + ): + # log: "closing idle connection" + self._connections.remove(connection) + closing_connections.append(connection) + + # Assign queued requests to connections. + queued_requests = [request for request in self._requests if request.is_queued()] + for pool_request in queued_requests: + origin = pool_request.request.url.origin + avilable_connections = [ + connection + for connection in self._connections + if connection.can_handle_request(origin) and connection.is_available() + ] + idle_connections = [ + connection for connection in self._connections if connection.is_idle() + ] + + # There are three cases for how we may be able to handle the request: + # + # 1. There is an existing connection that can handle the request. + # 2. We can create a new connection to handle the request. + # 3. We can close an idle connection and then create a new connection + # to handle the request. + if avilable_connections: + # log: "reusing existing connection" + connection = avilable_connections[0] + pool_request.assign_to_connection(connection) + elif len(self._connections) < self._max_connections: + # log: "creating new connection" + connection = self.create_connection(origin) + self._connections.append(connection) + pool_request.assign_to_connection(connection) + elif idle_connections: + # log: "closing idle connection" + connection = idle_connections[0] + self._connections.remove(connection) + closing_connections.append(connection) + # log: "creating new connection" + connection = self.create_connection(origin) + self._connections.append(connection) + pool_request.assign_to_connection(connection) + + return closing_connections + + def _close_connections(self, closing: List[ConnectionInterface]) -> None: + # Close connections which have been removed from the pool. + with ShieldCancellation(): + for connection in closing: + connection.close() + + def close(self) -> None: + # Explicitly close the connection pool. + # Clears all existing requests and connections. + with self._optional_thread_lock: + closing_connections = list(self._connections) + self._connections = [] + self._close_connections(closing_connections) + + def __enter__(self) -> "ConnectionPool": + return self + + def __exit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + self.close() + + def __repr__(self) -> str: + class_name = self.__class__.__name__ + with self._optional_thread_lock: + request_is_queued = [request.is_queued() for request in self._requests] + connection_is_idle = [ + connection.is_idle() for connection in self._connections + ] + + num_active_requests = request_is_queued.count(False) + num_queued_requests = request_is_queued.count(True) + num_active_connections = connection_is_idle.count(False) + num_idle_connections = connection_is_idle.count(True) + + requests_info = ( + f"Requests: {num_active_requests} active, {num_queued_requests} queued" + ) + connection_info = ( + f"Connections: {num_active_connections} active, {num_idle_connections} idle" + ) + + return f"<{class_name} [{requests_info} | {connection_info}]>" + + +class PoolByteStream: + def __init__( + self, + stream: Iterable[bytes], + pool_request: PoolRequest, + pool: ConnectionPool, + ) -> None: + self._stream = stream + self._pool_request = pool_request + self._pool = pool + self._closed = False + + def __iter__(self) -> Iterator[bytes]: + try: + for part in self._stream: + yield part + except BaseException as exc: + self.close() + raise exc from None + + def close(self) -> None: + if not self._closed: + self._closed = True + with ShieldCancellation(): + if hasattr(self._stream, "close"): + self._stream.close() + + with self._pool._optional_thread_lock: + self._pool._requests.remove(self._pool_request) + closing = self._pool._assign_requests_to_connections() + + self._pool._close_connections(closing) diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/http11.py b/venv/lib/python3.11/site-packages/httpcore/_sync/http11.py new file mode 100644 index 0000000..a74ff8e --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/http11.py @@ -0,0 +1,386 @@ +import enum +import logging +import ssl +import time +from types import TracebackType +from typing import ( + Any, + Iterable, + Iterator, + List, + Optional, + Tuple, + Type, + Union, +) + +import h11 + +from .._backends.base import NetworkStream +from .._exceptions import ( + ConnectionNotAvailable, + LocalProtocolError, + RemoteProtocolError, + WriteError, + map_exceptions, +) +from .._models import Origin, Request, Response +from .._synchronization import Lock, ShieldCancellation +from .._trace import Trace +from .interfaces import ConnectionInterface + +logger = logging.getLogger("httpcore.http11") + + +# A subset of `h11.Event` types supported by `_send_event` +H11SendEvent = Union[ + h11.Request, + h11.Data, + h11.EndOfMessage, +] + + +class HTTPConnectionState(enum.IntEnum): + NEW = 0 + ACTIVE = 1 + IDLE = 2 + CLOSED = 3 + + +class HTTP11Connection(ConnectionInterface): + READ_NUM_BYTES = 64 * 1024 + MAX_INCOMPLETE_EVENT_SIZE = 100 * 1024 + + def __init__( + self, + origin: Origin, + stream: NetworkStream, + keepalive_expiry: Optional[float] = None, + ) -> None: + self._origin = origin + self._network_stream = stream + self._keepalive_expiry: Optional[float] = keepalive_expiry + self._expire_at: Optional[float] = None + self._state = HTTPConnectionState.NEW + self._state_lock = Lock() + self._request_count = 0 + self._h11_state = h11.Connection( + our_role=h11.CLIENT, + max_incomplete_event_size=self.MAX_INCOMPLETE_EVENT_SIZE, + ) + + def handle_request(self, request: Request) -> Response: + if not self.can_handle_request(request.url.origin): + raise RuntimeError( + f"Attempted to send request to {request.url.origin} on connection " + f"to {self._origin}" + ) + + with self._state_lock: + if self._state in (HTTPConnectionState.NEW, HTTPConnectionState.IDLE): + self._request_count += 1 + self._state = HTTPConnectionState.ACTIVE + self._expire_at = None + else: + raise ConnectionNotAvailable() + + try: + kwargs = {"request": request} + try: + with Trace( + "send_request_headers", logger, request, kwargs + ) as trace: + self._send_request_headers(**kwargs) + with Trace("send_request_body", logger, request, kwargs) as trace: + self._send_request_body(**kwargs) + except WriteError: + # If we get a write error while we're writing the request, + # then we supress this error and move on to attempting to + # read the response. Servers can sometimes close the request + # pre-emptively and then respond with a well formed HTTP + # error response. + pass + + with Trace( + "receive_response_headers", logger, request, kwargs + ) as trace: + ( + http_version, + status, + reason_phrase, + headers, + trailing_data, + ) = self._receive_response_headers(**kwargs) + trace.return_value = ( + http_version, + status, + reason_phrase, + headers, + ) + + network_stream = self._network_stream + + # CONNECT or Upgrade request + if (status == 101) or ( + (request.method == b"CONNECT") and (200 <= status < 300) + ): + network_stream = HTTP11UpgradeStream(network_stream, trailing_data) + + return Response( + status=status, + headers=headers, + content=HTTP11ConnectionByteStream(self, request), + extensions={ + "http_version": http_version, + "reason_phrase": reason_phrase, + "network_stream": network_stream, + }, + ) + except BaseException as exc: + with ShieldCancellation(): + with Trace("response_closed", logger, request) as trace: + self._response_closed() + raise exc + + # Sending the request... + + def _send_request_headers(self, request: Request) -> None: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("write", None) + + with map_exceptions({h11.LocalProtocolError: LocalProtocolError}): + event = h11.Request( + method=request.method, + target=request.url.target, + headers=request.headers, + ) + self._send_event(event, timeout=timeout) + + def _send_request_body(self, request: Request) -> None: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("write", None) + + assert isinstance(request.stream, Iterable) + for chunk in request.stream: + event = h11.Data(data=chunk) + self._send_event(event, timeout=timeout) + + self._send_event(h11.EndOfMessage(), timeout=timeout) + + def _send_event( + self, event: h11.Event, timeout: Optional[float] = None + ) -> None: + bytes_to_send = self._h11_state.send(event) + if bytes_to_send is not None: + self._network_stream.write(bytes_to_send, timeout=timeout) + + # Receiving the response... + + def _receive_response_headers( + self, request: Request + ) -> Tuple[bytes, int, bytes, List[Tuple[bytes, bytes]], bytes]: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("read", None) + + while True: + event = self._receive_event(timeout=timeout) + if isinstance(event, h11.Response): + break + if ( + isinstance(event, h11.InformationalResponse) + and event.status_code == 101 + ): + break + + http_version = b"HTTP/" + event.http_version + + # h11 version 0.11+ supports a `raw_items` interface to get the + # raw header casing, rather than the enforced lowercase headers. + headers = event.headers.raw_items() + + trailing_data, _ = self._h11_state.trailing_data + + return http_version, event.status_code, event.reason, headers, trailing_data + + def _receive_response_body(self, request: Request) -> Iterator[bytes]: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("read", None) + + while True: + event = self._receive_event(timeout=timeout) + if isinstance(event, h11.Data): + yield bytes(event.data) + elif isinstance(event, (h11.EndOfMessage, h11.PAUSED)): + break + + def _receive_event( + self, timeout: Optional[float] = None + ) -> Union[h11.Event, Type[h11.PAUSED]]: + while True: + with map_exceptions({h11.RemoteProtocolError: RemoteProtocolError}): + event = self._h11_state.next_event() + + if event is h11.NEED_DATA: + data = self._network_stream.read( + self.READ_NUM_BYTES, timeout=timeout + ) + + # If we feed this case through h11 we'll raise an exception like: + # + # httpcore.RemoteProtocolError: can't handle event type + # ConnectionClosed when role=SERVER and state=SEND_RESPONSE + # + # Which is accurate, but not very informative from an end-user + # perspective. Instead we handle this case distinctly and treat + # it as a ConnectError. + if data == b"" and self._h11_state.their_state == h11.SEND_RESPONSE: + msg = "Server disconnected without sending a response." + raise RemoteProtocolError(msg) + + self._h11_state.receive_data(data) + else: + # mypy fails to narrow the type in the above if statement above + return event # type: ignore[return-value] + + def _response_closed(self) -> None: + with self._state_lock: + if ( + self._h11_state.our_state is h11.DONE + and self._h11_state.their_state is h11.DONE + ): + self._state = HTTPConnectionState.IDLE + self._h11_state.start_next_cycle() + if self._keepalive_expiry is not None: + now = time.monotonic() + self._expire_at = now + self._keepalive_expiry + else: + self.close() + + # Once the connection is no longer required... + + def close(self) -> None: + # Note that this method unilaterally closes the connection, and does + # not have any kind of locking in place around it. + self._state = HTTPConnectionState.CLOSED + self._network_stream.close() + + # The ConnectionInterface methods provide information about the state of + # the connection, allowing for a connection pooling implementation to + # determine when to reuse and when to close the connection... + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._origin + + def is_available(self) -> bool: + # Note that HTTP/1.1 connections in the "NEW" state are not treated as + # being "available". The control flow which created the connection will + # be able to send an outgoing request, but the connection will not be + # acquired from the connection pool for any other request. + return self._state == HTTPConnectionState.IDLE + + def has_expired(self) -> bool: + now = time.monotonic() + keepalive_expired = self._expire_at is not None and now > self._expire_at + + # If the HTTP connection is idle but the socket is readable, then the + # only valid state is that the socket is about to return b"", indicating + # a server-initiated disconnect. + server_disconnected = ( + self._state == HTTPConnectionState.IDLE + and self._network_stream.get_extra_info("is_readable") + ) + + return keepalive_expired or server_disconnected + + def is_idle(self) -> bool: + return self._state == HTTPConnectionState.IDLE + + def is_closed(self) -> bool: + return self._state == HTTPConnectionState.CLOSED + + def info(self) -> str: + origin = str(self._origin) + return ( + f"{origin!r}, HTTP/1.1, {self._state.name}, " + f"Request Count: {self._request_count}" + ) + + def __repr__(self) -> str: + class_name = self.__class__.__name__ + origin = str(self._origin) + return ( + f"<{class_name} [{origin!r}, {self._state.name}, " + f"Request Count: {self._request_count}]>" + ) + + # These context managers are not used in the standard flow, but are + # useful for testing or working with connection instances directly. + + def __enter__(self) -> "HTTP11Connection": + return self + + def __exit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + self.close() + + +class HTTP11ConnectionByteStream: + def __init__(self, connection: HTTP11Connection, request: Request) -> None: + self._connection = connection + self._request = request + self._closed = False + + def __iter__(self) -> Iterator[bytes]: + kwargs = {"request": self._request} + try: + with Trace("receive_response_body", logger, self._request, kwargs): + for chunk in self._connection._receive_response_body(**kwargs): + yield chunk + except BaseException as exc: + # If we get an exception while streaming the response, + # we want to close the response (and possibly the connection) + # before raising that exception. + with ShieldCancellation(): + self.close() + raise exc + + def close(self) -> None: + if not self._closed: + self._closed = True + with Trace("response_closed", logger, self._request): + self._connection._response_closed() + + +class HTTP11UpgradeStream(NetworkStream): + def __init__(self, stream: NetworkStream, leading_data: bytes) -> None: + self._stream = stream + self._leading_data = leading_data + + def read(self, max_bytes: int, timeout: Optional[float] = None) -> bytes: + if self._leading_data: + buffer = self._leading_data[:max_bytes] + self._leading_data = self._leading_data[max_bytes:] + return buffer + else: + return self._stream.read(max_bytes, timeout) + + def write(self, buffer: bytes, timeout: Optional[float] = None) -> None: + self._stream.write(buffer, timeout) + + def close(self) -> None: + self._stream.close() + + def start_tls( + self, + ssl_context: ssl.SSLContext, + server_hostname: Optional[str] = None, + timeout: Optional[float] = None, + ) -> NetworkStream: + return self._stream.start_tls(ssl_context, server_hostname, timeout) + + def get_extra_info(self, info: str) -> Any: + return self._stream.get_extra_info(info) diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/http2.py b/venv/lib/python3.11/site-packages/httpcore/_sync/http2.py new file mode 100644 index 0000000..1ee4bbb --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/http2.py @@ -0,0 +1,589 @@ +import enum +import logging +import time +import types +import typing + +import h2.config +import h2.connection +import h2.events +import h2.exceptions +import h2.settings + +from .._backends.base import NetworkStream +from .._exceptions import ( + ConnectionNotAvailable, + LocalProtocolError, + RemoteProtocolError, +) +from .._models import Origin, Request, Response +from .._synchronization import Lock, Semaphore, ShieldCancellation +from .._trace import Trace +from .interfaces import ConnectionInterface + +logger = logging.getLogger("httpcore.http2") + + +def has_body_headers(request: Request) -> bool: + return any( + k.lower() == b"content-length" or k.lower() == b"transfer-encoding" + for k, v in request.headers + ) + + +class HTTPConnectionState(enum.IntEnum): + ACTIVE = 1 + IDLE = 2 + CLOSED = 3 + + +class HTTP2Connection(ConnectionInterface): + READ_NUM_BYTES = 64 * 1024 + CONFIG = h2.config.H2Configuration(validate_inbound_headers=False) + + def __init__( + self, + origin: Origin, + stream: NetworkStream, + keepalive_expiry: typing.Optional[float] = None, + ): + self._origin = origin + self._network_stream = stream + self._keepalive_expiry: typing.Optional[float] = keepalive_expiry + self._h2_state = h2.connection.H2Connection(config=self.CONFIG) + self._state = HTTPConnectionState.IDLE + self._expire_at: typing.Optional[float] = None + self._request_count = 0 + self._init_lock = Lock() + self._state_lock = Lock() + self._read_lock = Lock() + self._write_lock = Lock() + self._sent_connection_init = False + self._used_all_stream_ids = False + self._connection_error = False + + # Mapping from stream ID to response stream events. + self._events: typing.Dict[ + int, + typing.Union[ + h2.events.ResponseReceived, + h2.events.DataReceived, + h2.events.StreamEnded, + h2.events.StreamReset, + ], + ] = {} + + # Connection terminated events are stored as state since + # we need to handle them for all streams. + self._connection_terminated: typing.Optional[h2.events.ConnectionTerminated] = ( + None + ) + + self._read_exception: typing.Optional[Exception] = None + self._write_exception: typing.Optional[Exception] = None + + def handle_request(self, request: Request) -> Response: + if not self.can_handle_request(request.url.origin): + # This cannot occur in normal operation, since the connection pool + # will only send requests on connections that handle them. + # It's in place simply for resilience as a guard against incorrect + # usage, for anyone working directly with httpcore connections. + raise RuntimeError( + f"Attempted to send request to {request.url.origin} on connection " + f"to {self._origin}" + ) + + with self._state_lock: + if self._state in (HTTPConnectionState.ACTIVE, HTTPConnectionState.IDLE): + self._request_count += 1 + self._expire_at = None + self._state = HTTPConnectionState.ACTIVE + else: + raise ConnectionNotAvailable() + + with self._init_lock: + if not self._sent_connection_init: + try: + kwargs = {"request": request} + with Trace("send_connection_init", logger, request, kwargs): + self._send_connection_init(**kwargs) + except BaseException as exc: + with ShieldCancellation(): + self.close() + raise exc + + self._sent_connection_init = True + + # Initially start with just 1 until the remote server provides + # its max_concurrent_streams value + self._max_streams = 1 + + local_settings_max_streams = ( + self._h2_state.local_settings.max_concurrent_streams + ) + self._max_streams_semaphore = Semaphore(local_settings_max_streams) + + for _ in range(local_settings_max_streams - self._max_streams): + self._max_streams_semaphore.acquire() + + self._max_streams_semaphore.acquire() + + try: + stream_id = self._h2_state.get_next_available_stream_id() + self._events[stream_id] = [] + except h2.exceptions.NoAvailableStreamIDError: # pragma: nocover + self._used_all_stream_ids = True + self._request_count -= 1 + raise ConnectionNotAvailable() + + try: + kwargs = {"request": request, "stream_id": stream_id} + with Trace("send_request_headers", logger, request, kwargs): + self._send_request_headers(request=request, stream_id=stream_id) + with Trace("send_request_body", logger, request, kwargs): + self._send_request_body(request=request, stream_id=stream_id) + with Trace( + "receive_response_headers", logger, request, kwargs + ) as trace: + status, headers = self._receive_response( + request=request, stream_id=stream_id + ) + trace.return_value = (status, headers) + + return Response( + status=status, + headers=headers, + content=HTTP2ConnectionByteStream(self, request, stream_id=stream_id), + extensions={ + "http_version": b"HTTP/2", + "network_stream": self._network_stream, + "stream_id": stream_id, + }, + ) + except BaseException as exc: # noqa: PIE786 + with ShieldCancellation(): + kwargs = {"stream_id": stream_id} + with Trace("response_closed", logger, request, kwargs): + self._response_closed(stream_id=stream_id) + + if isinstance(exc, h2.exceptions.ProtocolError): + # One case where h2 can raise a protocol error is when a + # closed frame has been seen by the state machine. + # + # This happens when one stream is reading, and encounters + # a GOAWAY event. Other flows of control may then raise + # a protocol error at any point they interact with the 'h2_state'. + # + # In this case we'll have stored the event, and should raise + # it as a RemoteProtocolError. + if self._connection_terminated: # pragma: nocover + raise RemoteProtocolError(self._connection_terminated) + # If h2 raises a protocol error in some other state then we + # must somehow have made a protocol violation. + raise LocalProtocolError(exc) # pragma: nocover + + raise exc + + def _send_connection_init(self, request: Request) -> None: + """ + The HTTP/2 connection requires some initial setup before we can start + using individual request/response streams on it. + """ + # Need to set these manually here instead of manipulating via + # __setitem__() otherwise the H2Connection will emit SettingsUpdate + # frames in addition to sending the undesired defaults. + self._h2_state.local_settings = h2.settings.Settings( + client=True, + initial_values={ + # Disable PUSH_PROMISE frames from the server since we don't do anything + # with them for now. Maybe when we support caching? + h2.settings.SettingCodes.ENABLE_PUSH: 0, + # These two are taken from h2 for safe defaults + h2.settings.SettingCodes.MAX_CONCURRENT_STREAMS: 100, + h2.settings.SettingCodes.MAX_HEADER_LIST_SIZE: 65536, + }, + ) + + # Some websites (*cough* Yahoo *cough*) balk at this setting being + # present in the initial handshake since it's not defined in the original + # RFC despite the RFC mandating ignoring settings you don't know about. + del self._h2_state.local_settings[ + h2.settings.SettingCodes.ENABLE_CONNECT_PROTOCOL + ] + + self._h2_state.initiate_connection() + self._h2_state.increment_flow_control_window(2**24) + self._write_outgoing_data(request) + + # Sending the request... + + def _send_request_headers(self, request: Request, stream_id: int) -> None: + """ + Send the request headers to a given stream ID. + """ + end_stream = not has_body_headers(request) + + # In HTTP/2 the ':authority' pseudo-header is used instead of 'Host'. + # In order to gracefully handle HTTP/1.1 and HTTP/2 we always require + # HTTP/1.1 style headers, and map them appropriately if we end up on + # an HTTP/2 connection. + authority = [v for k, v in request.headers if k.lower() == b"host"][0] + + headers = [ + (b":method", request.method), + (b":authority", authority), + (b":scheme", request.url.scheme), + (b":path", request.url.target), + ] + [ + (k.lower(), v) + for k, v in request.headers + if k.lower() + not in ( + b"host", + b"transfer-encoding", + ) + ] + + self._h2_state.send_headers(stream_id, headers, end_stream=end_stream) + self._h2_state.increment_flow_control_window(2**24, stream_id=stream_id) + self._write_outgoing_data(request) + + def _send_request_body(self, request: Request, stream_id: int) -> None: + """ + Iterate over the request body sending it to a given stream ID. + """ + if not has_body_headers(request): + return + + assert isinstance(request.stream, typing.Iterable) + for data in request.stream: + self._send_stream_data(request, stream_id, data) + self._send_end_stream(request, stream_id) + + def _send_stream_data( + self, request: Request, stream_id: int, data: bytes + ) -> None: + """ + Send a single chunk of data in one or more data frames. + """ + while data: + max_flow = self._wait_for_outgoing_flow(request, stream_id) + chunk_size = min(len(data), max_flow) + chunk, data = data[:chunk_size], data[chunk_size:] + self._h2_state.send_data(stream_id, chunk) + self._write_outgoing_data(request) + + def _send_end_stream(self, request: Request, stream_id: int) -> None: + """ + Send an empty data frame on on a given stream ID with the END_STREAM flag set. + """ + self._h2_state.end_stream(stream_id) + self._write_outgoing_data(request) + + # Receiving the response... + + def _receive_response( + self, request: Request, stream_id: int + ) -> typing.Tuple[int, typing.List[typing.Tuple[bytes, bytes]]]: + """ + Return the response status code and headers for a given stream ID. + """ + while True: + event = self._receive_stream_event(request, stream_id) + if isinstance(event, h2.events.ResponseReceived): + break + + status_code = 200 + headers = [] + for k, v in event.headers: + if k == b":status": + status_code = int(v.decode("ascii", errors="ignore")) + elif not k.startswith(b":"): + headers.append((k, v)) + + return (status_code, headers) + + def _receive_response_body( + self, request: Request, stream_id: int + ) -> typing.Iterator[bytes]: + """ + Iterator that returns the bytes of the response body for a given stream ID. + """ + while True: + event = self._receive_stream_event(request, stream_id) + if isinstance(event, h2.events.DataReceived): + amount = event.flow_controlled_length + self._h2_state.acknowledge_received_data(amount, stream_id) + self._write_outgoing_data(request) + yield event.data + elif isinstance(event, h2.events.StreamEnded): + break + + def _receive_stream_event( + self, request: Request, stream_id: int + ) -> typing.Union[ + h2.events.ResponseReceived, h2.events.DataReceived, h2.events.StreamEnded + ]: + """ + Return the next available event for a given stream ID. + + Will read more data from the network if required. + """ + while not self._events.get(stream_id): + self._receive_events(request, stream_id) + event = self._events[stream_id].pop(0) + if isinstance(event, h2.events.StreamReset): + raise RemoteProtocolError(event) + return event + + def _receive_events( + self, request: Request, stream_id: typing.Optional[int] = None + ) -> None: + """ + Read some data from the network until we see one or more events + for a given stream ID. + """ + with self._read_lock: + if self._connection_terminated is not None: + last_stream_id = self._connection_terminated.last_stream_id + if stream_id and last_stream_id and stream_id > last_stream_id: + self._request_count -= 1 + raise ConnectionNotAvailable() + raise RemoteProtocolError(self._connection_terminated) + + # This conditional is a bit icky. We don't want to block reading if we've + # actually got an event to return for a given stream. We need to do that + # check *within* the atomic read lock. Though it also need to be optional, + # because when we call it from `_wait_for_outgoing_flow` we *do* want to + # block until we've available flow control, event when we have events + # pending for the stream ID we're attempting to send on. + if stream_id is None or not self._events.get(stream_id): + events = self._read_incoming_data(request) + for event in events: + if isinstance(event, h2.events.RemoteSettingsChanged): + with Trace( + "receive_remote_settings", logger, request + ) as trace: + self._receive_remote_settings_change(event) + trace.return_value = event + + elif isinstance( + event, + ( + h2.events.ResponseReceived, + h2.events.DataReceived, + h2.events.StreamEnded, + h2.events.StreamReset, + ), + ): + if event.stream_id in self._events: + self._events[event.stream_id].append(event) + + elif isinstance(event, h2.events.ConnectionTerminated): + self._connection_terminated = event + + self._write_outgoing_data(request) + + def _receive_remote_settings_change(self, event: h2.events.Event) -> None: + max_concurrent_streams = event.changed_settings.get( + h2.settings.SettingCodes.MAX_CONCURRENT_STREAMS + ) + if max_concurrent_streams: + new_max_streams = min( + max_concurrent_streams.new_value, + self._h2_state.local_settings.max_concurrent_streams, + ) + if new_max_streams and new_max_streams != self._max_streams: + while new_max_streams > self._max_streams: + self._max_streams_semaphore.release() + self._max_streams += 1 + while new_max_streams < self._max_streams: + self._max_streams_semaphore.acquire() + self._max_streams -= 1 + + def _response_closed(self, stream_id: int) -> None: + self._max_streams_semaphore.release() + del self._events[stream_id] + with self._state_lock: + if self._connection_terminated and not self._events: + self.close() + + elif self._state == HTTPConnectionState.ACTIVE and not self._events: + self._state = HTTPConnectionState.IDLE + if self._keepalive_expiry is not None: + now = time.monotonic() + self._expire_at = now + self._keepalive_expiry + if self._used_all_stream_ids: # pragma: nocover + self.close() + + def close(self) -> None: + # Note that this method unilaterally closes the connection, and does + # not have any kind of locking in place around it. + self._h2_state.close_connection() + self._state = HTTPConnectionState.CLOSED + self._network_stream.close() + + # Wrappers around network read/write operations... + + def _read_incoming_data( + self, request: Request + ) -> typing.List[h2.events.Event]: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("read", None) + + if self._read_exception is not None: + raise self._read_exception # pragma: nocover + + try: + data = self._network_stream.read(self.READ_NUM_BYTES, timeout) + if data == b"": + raise RemoteProtocolError("Server disconnected") + except Exception as exc: + # If we get a network error we should: + # + # 1. Save the exception and just raise it immediately on any future reads. + # (For example, this means that a single read timeout or disconnect will + # immediately close all pending streams. Without requiring multiple + # sequential timeouts.) + # 2. Mark the connection as errored, so that we don't accept any other + # incoming requests. + self._read_exception = exc + self._connection_error = True + raise exc + + events: typing.List[h2.events.Event] = self._h2_state.receive_data(data) + + return events + + def _write_outgoing_data(self, request: Request) -> None: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("write", None) + + with self._write_lock: + data_to_send = self._h2_state.data_to_send() + + if self._write_exception is not None: + raise self._write_exception # pragma: nocover + + try: + self._network_stream.write(data_to_send, timeout) + except Exception as exc: # pragma: nocover + # If we get a network error we should: + # + # 1. Save the exception and just raise it immediately on any future write. + # (For example, this means that a single write timeout or disconnect will + # immediately close all pending streams. Without requiring multiple + # sequential timeouts.) + # 2. Mark the connection as errored, so that we don't accept any other + # incoming requests. + self._write_exception = exc + self._connection_error = True + raise exc + + # Flow control... + + def _wait_for_outgoing_flow(self, request: Request, stream_id: int) -> int: + """ + Returns the maximum allowable outgoing flow for a given stream. + + If the allowable flow is zero, then waits on the network until + WindowUpdated frames have increased the flow rate. + https://tools.ietf.org/html/rfc7540#section-6.9 + """ + local_flow: int = self._h2_state.local_flow_control_window(stream_id) + max_frame_size: int = self._h2_state.max_outbound_frame_size + flow = min(local_flow, max_frame_size) + while flow == 0: + self._receive_events(request) + local_flow = self._h2_state.local_flow_control_window(stream_id) + max_frame_size = self._h2_state.max_outbound_frame_size + flow = min(local_flow, max_frame_size) + return flow + + # Interface for connection pooling... + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._origin + + def is_available(self) -> bool: + return ( + self._state != HTTPConnectionState.CLOSED + and not self._connection_error + and not self._used_all_stream_ids + and not ( + self._h2_state.state_machine.state + == h2.connection.ConnectionState.CLOSED + ) + ) + + def has_expired(self) -> bool: + now = time.monotonic() + return self._expire_at is not None and now > self._expire_at + + def is_idle(self) -> bool: + return self._state == HTTPConnectionState.IDLE + + def is_closed(self) -> bool: + return self._state == HTTPConnectionState.CLOSED + + def info(self) -> str: + origin = str(self._origin) + return ( + f"{origin!r}, HTTP/2, {self._state.name}, " + f"Request Count: {self._request_count}" + ) + + def __repr__(self) -> str: + class_name = self.__class__.__name__ + origin = str(self._origin) + return ( + f"<{class_name} [{origin!r}, {self._state.name}, " + f"Request Count: {self._request_count}]>" + ) + + # These context managers are not used in the standard flow, but are + # useful for testing or working with connection instances directly. + + def __enter__(self) -> "HTTP2Connection": + return self + + def __exit__( + self, + exc_type: typing.Optional[typing.Type[BaseException]] = None, + exc_value: typing.Optional[BaseException] = None, + traceback: typing.Optional[types.TracebackType] = None, + ) -> None: + self.close() + + +class HTTP2ConnectionByteStream: + def __init__( + self, connection: HTTP2Connection, request: Request, stream_id: int + ) -> None: + self._connection = connection + self._request = request + self._stream_id = stream_id + self._closed = False + + def __iter__(self) -> typing.Iterator[bytes]: + kwargs = {"request": self._request, "stream_id": self._stream_id} + try: + with Trace("receive_response_body", logger, self._request, kwargs): + for chunk in self._connection._receive_response_body( + request=self._request, stream_id=self._stream_id + ): + yield chunk + except BaseException as exc: + # If we get an exception while streaming the response, + # we want to close the response (and possibly the connection) + # before raising that exception. + with ShieldCancellation(): + self.close() + raise exc + + def close(self) -> None: + if not self._closed: + self._closed = True + kwargs = {"stream_id": self._stream_id} + with Trace("response_closed", logger, self._request, kwargs): + self._connection._response_closed(stream_id=self._stream_id) diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/http_proxy.py b/venv/lib/python3.11/site-packages/httpcore/_sync/http_proxy.py new file mode 100644 index 0000000..6acac9a --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/http_proxy.py @@ -0,0 +1,368 @@ +import logging +import ssl +from base64 import b64encode +from typing import Iterable, List, Mapping, Optional, Sequence, Tuple, Union + +from .._backends.base import SOCKET_OPTION, NetworkBackend +from .._exceptions import ProxyError +from .._models import ( + URL, + Origin, + Request, + Response, + enforce_bytes, + enforce_headers, + enforce_url, +) +from .._ssl import default_ssl_context +from .._synchronization import Lock +from .._trace import Trace +from .connection import HTTPConnection +from .connection_pool import ConnectionPool +from .http11 import HTTP11Connection +from .interfaces import ConnectionInterface + +HeadersAsSequence = Sequence[Tuple[Union[bytes, str], Union[bytes, str]]] +HeadersAsMapping = Mapping[Union[bytes, str], Union[bytes, str]] + + +logger = logging.getLogger("httpcore.proxy") + + +def merge_headers( + default_headers: Optional[Sequence[Tuple[bytes, bytes]]] = None, + override_headers: Optional[Sequence[Tuple[bytes, bytes]]] = None, +) -> List[Tuple[bytes, bytes]]: + """ + Append default_headers and override_headers, de-duplicating if a key exists + in both cases. + """ + default_headers = [] if default_headers is None else list(default_headers) + override_headers = [] if override_headers is None else list(override_headers) + has_override = set(key.lower() for key, value in override_headers) + default_headers = [ + (key, value) + for key, value in default_headers + if key.lower() not in has_override + ] + return default_headers + override_headers + + +def build_auth_header(username: bytes, password: bytes) -> bytes: + userpass = username + b":" + password + return b"Basic " + b64encode(userpass) + + +class HTTPProxy(ConnectionPool): + """ + A connection pool that sends requests via an HTTP proxy. + """ + + def __init__( + self, + proxy_url: Union[URL, bytes, str], + proxy_auth: Optional[Tuple[Union[bytes, str], Union[bytes, str]]] = None, + proxy_headers: Union[HeadersAsMapping, HeadersAsSequence, None] = None, + ssl_context: Optional[ssl.SSLContext] = None, + proxy_ssl_context: Optional[ssl.SSLContext] = None, + max_connections: Optional[int] = 10, + max_keepalive_connections: Optional[int] = None, + keepalive_expiry: Optional[float] = None, + http1: bool = True, + http2: bool = False, + retries: int = 0, + local_address: Optional[str] = None, + uds: Optional[str] = None, + network_backend: Optional[NetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + ) -> None: + """ + A connection pool for making HTTP requests. + + Parameters: + proxy_url: The URL to use when connecting to the proxy server. + For example `"http://127.0.0.1:8080/"`. + proxy_auth: Any proxy authentication as a two-tuple of + (username, password). May be either bytes or ascii-only str. + proxy_headers: Any HTTP headers to use for the proxy requests. + For example `{"Proxy-Authorization": "Basic <username>:<password>"}`. + ssl_context: An SSL context to use for verifying connections. + If not specified, the default `httpcore.default_ssl_context()` + will be used. + proxy_ssl_context: The same as `ssl_context`, but for a proxy server rather than a remote origin. + max_connections: The maximum number of concurrent HTTP connections that + the pool should allow. Any attempt to send a request on a pool that + would exceed this amount will block until a connection is available. + max_keepalive_connections: The maximum number of idle HTTP connections + that will be maintained in the pool. + keepalive_expiry: The duration in seconds that an idle HTTP connection + may be maintained for before being expired from the pool. + http1: A boolean indicating if HTTP/1.1 requests should be supported + by the connection pool. Defaults to True. + http2: A boolean indicating if HTTP/2 requests should be supported by + the connection pool. Defaults to False. + retries: The maximum number of retries when trying to establish + a connection. + local_address: Local address to connect from. Can also be used to + connect using a particular address family. Using + `local_address="0.0.0.0"` will connect using an `AF_INET` address + (IPv4), while using `local_address="::"` will connect using an + `AF_INET6` address (IPv6). + uds: Path to a Unix Domain Socket to use instead of TCP sockets. + network_backend: A backend instance to use for handling network I/O. + """ + super().__init__( + ssl_context=ssl_context, + max_connections=max_connections, + max_keepalive_connections=max_keepalive_connections, + keepalive_expiry=keepalive_expiry, + http1=http1, + http2=http2, + network_backend=network_backend, + retries=retries, + local_address=local_address, + uds=uds, + socket_options=socket_options, + ) + + self._proxy_url = enforce_url(proxy_url, name="proxy_url") + if ( + self._proxy_url.scheme == b"http" and proxy_ssl_context is not None + ): # pragma: no cover + raise RuntimeError( + "The `proxy_ssl_context` argument is not allowed for the http scheme" + ) + + self._ssl_context = ssl_context + self._proxy_ssl_context = proxy_ssl_context + self._proxy_headers = enforce_headers(proxy_headers, name="proxy_headers") + if proxy_auth is not None: + username = enforce_bytes(proxy_auth[0], name="proxy_auth") + password = enforce_bytes(proxy_auth[1], name="proxy_auth") + authorization = build_auth_header(username, password) + self._proxy_headers = [ + (b"Proxy-Authorization", authorization) + ] + self._proxy_headers + + def create_connection(self, origin: Origin) -> ConnectionInterface: + if origin.scheme == b"http": + return ForwardHTTPConnection( + proxy_origin=self._proxy_url.origin, + proxy_headers=self._proxy_headers, + remote_origin=origin, + keepalive_expiry=self._keepalive_expiry, + network_backend=self._network_backend, + proxy_ssl_context=self._proxy_ssl_context, + ) + return TunnelHTTPConnection( + proxy_origin=self._proxy_url.origin, + proxy_headers=self._proxy_headers, + remote_origin=origin, + ssl_context=self._ssl_context, + proxy_ssl_context=self._proxy_ssl_context, + keepalive_expiry=self._keepalive_expiry, + http1=self._http1, + http2=self._http2, + network_backend=self._network_backend, + ) + + +class ForwardHTTPConnection(ConnectionInterface): + def __init__( + self, + proxy_origin: Origin, + remote_origin: Origin, + proxy_headers: Union[HeadersAsMapping, HeadersAsSequence, None] = None, + keepalive_expiry: Optional[float] = None, + network_backend: Optional[NetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + proxy_ssl_context: Optional[ssl.SSLContext] = None, + ) -> None: + self._connection = HTTPConnection( + origin=proxy_origin, + keepalive_expiry=keepalive_expiry, + network_backend=network_backend, + socket_options=socket_options, + ssl_context=proxy_ssl_context, + ) + self._proxy_origin = proxy_origin + self._proxy_headers = enforce_headers(proxy_headers, name="proxy_headers") + self._remote_origin = remote_origin + + def handle_request(self, request: Request) -> Response: + headers = merge_headers(self._proxy_headers, request.headers) + url = URL( + scheme=self._proxy_origin.scheme, + host=self._proxy_origin.host, + port=self._proxy_origin.port, + target=bytes(request.url), + ) + proxy_request = Request( + method=request.method, + url=url, + headers=headers, + content=request.stream, + extensions=request.extensions, + ) + return self._connection.handle_request(proxy_request) + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._remote_origin + + def close(self) -> None: + self._connection.close() + + def info(self) -> str: + return self._connection.info() + + def is_available(self) -> bool: + return self._connection.is_available() + + def has_expired(self) -> bool: + return self._connection.has_expired() + + def is_idle(self) -> bool: + return self._connection.is_idle() + + def is_closed(self) -> bool: + return self._connection.is_closed() + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.info()}]>" + + +class TunnelHTTPConnection(ConnectionInterface): + def __init__( + self, + proxy_origin: Origin, + remote_origin: Origin, + ssl_context: Optional[ssl.SSLContext] = None, + proxy_ssl_context: Optional[ssl.SSLContext] = None, + proxy_headers: Optional[Sequence[Tuple[bytes, bytes]]] = None, + keepalive_expiry: Optional[float] = None, + http1: bool = True, + http2: bool = False, + network_backend: Optional[NetworkBackend] = None, + socket_options: Optional[Iterable[SOCKET_OPTION]] = None, + ) -> None: + self._connection: ConnectionInterface = HTTPConnection( + origin=proxy_origin, + keepalive_expiry=keepalive_expiry, + network_backend=network_backend, + socket_options=socket_options, + ssl_context=proxy_ssl_context, + ) + self._proxy_origin = proxy_origin + self._remote_origin = remote_origin + self._ssl_context = ssl_context + self._proxy_ssl_context = proxy_ssl_context + self._proxy_headers = enforce_headers(proxy_headers, name="proxy_headers") + self._keepalive_expiry = keepalive_expiry + self._http1 = http1 + self._http2 = http2 + self._connect_lock = Lock() + self._connected = False + + def handle_request(self, request: Request) -> Response: + timeouts = request.extensions.get("timeout", {}) + timeout = timeouts.get("connect", None) + + with self._connect_lock: + if not self._connected: + target = b"%b:%d" % (self._remote_origin.host, self._remote_origin.port) + + connect_url = URL( + scheme=self._proxy_origin.scheme, + host=self._proxy_origin.host, + port=self._proxy_origin.port, + target=target, + ) + connect_headers = merge_headers( + [(b"Host", target), (b"Accept", b"*/*")], self._proxy_headers + ) + connect_request = Request( + method=b"CONNECT", + url=connect_url, + headers=connect_headers, + extensions=request.extensions, + ) + connect_response = self._connection.handle_request( + connect_request + ) + + if connect_response.status < 200 or connect_response.status > 299: + reason_bytes = connect_response.extensions.get("reason_phrase", b"") + reason_str = reason_bytes.decode("ascii", errors="ignore") + msg = "%d %s" % (connect_response.status, reason_str) + self._connection.close() + raise ProxyError(msg) + + stream = connect_response.extensions["network_stream"] + + # Upgrade the stream to SSL + ssl_context = ( + default_ssl_context() + if self._ssl_context is None + else self._ssl_context + ) + alpn_protocols = ["http/1.1", "h2"] if self._http2 else ["http/1.1"] + ssl_context.set_alpn_protocols(alpn_protocols) + + kwargs = { + "ssl_context": ssl_context, + "server_hostname": self._remote_origin.host.decode("ascii"), + "timeout": timeout, + } + with Trace("start_tls", logger, request, kwargs) as trace: + stream = stream.start_tls(**kwargs) + trace.return_value = stream + + # Determine if we should be using HTTP/1.1 or HTTP/2 + ssl_object = stream.get_extra_info("ssl_object") + http2_negotiated = ( + ssl_object is not None + and ssl_object.selected_alpn_protocol() == "h2" + ) + + # Create the HTTP/1.1 or HTTP/2 connection + if http2_negotiated or (self._http2 and not self._http1): + from .http2 import HTTP2Connection + + self._connection = HTTP2Connection( + origin=self._remote_origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + else: + self._connection = HTTP11Connection( + origin=self._remote_origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + + self._connected = True + return self._connection.handle_request(request) + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._remote_origin + + def close(self) -> None: + self._connection.close() + + def info(self) -> str: + return self._connection.info() + + def is_available(self) -> bool: + return self._connection.is_available() + + def has_expired(self) -> bool: + return self._connection.has_expired() + + def is_idle(self) -> bool: + return self._connection.is_idle() + + def is_closed(self) -> bool: + return self._connection.is_closed() + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.info()}]>" diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/interfaces.py b/venv/lib/python3.11/site-packages/httpcore/_sync/interfaces.py new file mode 100644 index 0000000..5e95be1 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/interfaces.py @@ -0,0 +1,135 @@ +from contextlib import contextmanager +from typing import Iterator, Optional, Union + +from .._models import ( + URL, + Extensions, + HeaderTypes, + Origin, + Request, + Response, + enforce_bytes, + enforce_headers, + enforce_url, + include_request_headers, +) + + +class RequestInterface: + def request( + self, + method: Union[bytes, str], + url: Union[URL, bytes, str], + *, + headers: HeaderTypes = None, + content: Union[bytes, Iterator[bytes], None] = None, + extensions: Optional[Extensions] = None, + ) -> Response: + # Strict type checking on our parameters. + method = enforce_bytes(method, name="method") + url = enforce_url(url, name="url") + headers = enforce_headers(headers, name="headers") + + # Include Host header, and optionally Content-Length or Transfer-Encoding. + headers = include_request_headers(headers, url=url, content=content) + + request = Request( + method=method, + url=url, + headers=headers, + content=content, + extensions=extensions, + ) + response = self.handle_request(request) + try: + response.read() + finally: + response.close() + return response + + @contextmanager + def stream( + self, + method: Union[bytes, str], + url: Union[URL, bytes, str], + *, + headers: HeaderTypes = None, + content: Union[bytes, Iterator[bytes], None] = None, + extensions: Optional[Extensions] = None, + ) -> Iterator[Response]: + # Strict type checking on our parameters. + method = enforce_bytes(method, name="method") + url = enforce_url(url, name="url") + headers = enforce_headers(headers, name="headers") + + # Include Host header, and optionally Content-Length or Transfer-Encoding. + headers = include_request_headers(headers, url=url, content=content) + + request = Request( + method=method, + url=url, + headers=headers, + content=content, + extensions=extensions, + ) + response = self.handle_request(request) + try: + yield response + finally: + response.close() + + def handle_request(self, request: Request) -> Response: + raise NotImplementedError() # pragma: nocover + + +class ConnectionInterface(RequestInterface): + def close(self) -> None: + raise NotImplementedError() # pragma: nocover + + def info(self) -> str: + raise NotImplementedError() # pragma: nocover + + def can_handle_request(self, origin: Origin) -> bool: + raise NotImplementedError() # pragma: nocover + + def is_available(self) -> bool: + """ + Return `True` if the connection is currently able to accept an + outgoing request. + + An HTTP/1.1 connection will only be available if it is currently idle. + + An HTTP/2 connection will be available so long as the stream ID space is + not yet exhausted, and the connection is not in an error state. + + While the connection is being established we may not yet know if it is going + to result in an HTTP/1.1 or HTTP/2 connection. The connection should be + treated as being available, but might ultimately raise `NewConnectionRequired` + required exceptions if multiple requests are attempted over a connection + that ends up being established as HTTP/1.1. + """ + raise NotImplementedError() # pragma: nocover + + def has_expired(self) -> bool: + """ + Return `True` if the connection is in a state where it should be closed. + + This either means that the connection is idle and it has passed the + expiry time on its keep-alive, or that server has sent an EOF. + """ + raise NotImplementedError() # pragma: nocover + + def is_idle(self) -> bool: + """ + Return `True` if the connection is currently idle. + """ + raise NotImplementedError() # pragma: nocover + + def is_closed(self) -> bool: + """ + Return `True` if the connection has been closed. + + Used when a response is closed to determine if the connection may be + returned to the connection pool or not. + """ + raise NotImplementedError() # pragma: nocover diff --git a/venv/lib/python3.11/site-packages/httpcore/_sync/socks_proxy.py b/venv/lib/python3.11/site-packages/httpcore/_sync/socks_proxy.py new file mode 100644 index 0000000..502e4d7 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_sync/socks_proxy.py @@ -0,0 +1,342 @@ +import logging +import ssl +import typing + +from socksio import socks5 + +from .._backends.sync import SyncBackend +from .._backends.base import NetworkBackend, NetworkStream +from .._exceptions import ConnectionNotAvailable, ProxyError +from .._models import URL, Origin, Request, Response, enforce_bytes, enforce_url +from .._ssl import default_ssl_context +from .._synchronization import Lock +from .._trace import Trace +from .connection_pool import ConnectionPool +from .http11 import HTTP11Connection +from .interfaces import ConnectionInterface + +logger = logging.getLogger("httpcore.socks") + + +AUTH_METHODS = { + b"\x00": "NO AUTHENTICATION REQUIRED", + b"\x01": "GSSAPI", + b"\x02": "USERNAME/PASSWORD", + b"\xff": "NO ACCEPTABLE METHODS", +} + +REPLY_CODES = { + b"\x00": "Succeeded", + b"\x01": "General SOCKS server failure", + b"\x02": "Connection not allowed by ruleset", + b"\x03": "Network unreachable", + b"\x04": "Host unreachable", + b"\x05": "Connection refused", + b"\x06": "TTL expired", + b"\x07": "Command not supported", + b"\x08": "Address type not supported", +} + + +def _init_socks5_connection( + stream: NetworkStream, + *, + host: bytes, + port: int, + auth: typing.Optional[typing.Tuple[bytes, bytes]] = None, +) -> None: + conn = socks5.SOCKS5Connection() + + # Auth method request + auth_method = ( + socks5.SOCKS5AuthMethod.NO_AUTH_REQUIRED + if auth is None + else socks5.SOCKS5AuthMethod.USERNAME_PASSWORD + ) + conn.send(socks5.SOCKS5AuthMethodsRequest([auth_method])) + outgoing_bytes = conn.data_to_send() + stream.write(outgoing_bytes) + + # Auth method response + incoming_bytes = stream.read(max_bytes=4096) + response = conn.receive_data(incoming_bytes) + assert isinstance(response, socks5.SOCKS5AuthReply) + if response.method != auth_method: + requested = AUTH_METHODS.get(auth_method, "UNKNOWN") + responded = AUTH_METHODS.get(response.method, "UNKNOWN") + raise ProxyError( + f"Requested {requested} from proxy server, but got {responded}." + ) + + if response.method == socks5.SOCKS5AuthMethod.USERNAME_PASSWORD: + # Username/password request + assert auth is not None + username, password = auth + conn.send(socks5.SOCKS5UsernamePasswordRequest(username, password)) + outgoing_bytes = conn.data_to_send() + stream.write(outgoing_bytes) + + # Username/password response + incoming_bytes = stream.read(max_bytes=4096) + response = conn.receive_data(incoming_bytes) + assert isinstance(response, socks5.SOCKS5UsernamePasswordReply) + if not response.success: + raise ProxyError("Invalid username/password") + + # Connect request + conn.send( + socks5.SOCKS5CommandRequest.from_address( + socks5.SOCKS5Command.CONNECT, (host, port) + ) + ) + outgoing_bytes = conn.data_to_send() + stream.write(outgoing_bytes) + + # Connect response + incoming_bytes = stream.read(max_bytes=4096) + response = conn.receive_data(incoming_bytes) + assert isinstance(response, socks5.SOCKS5Reply) + if response.reply_code != socks5.SOCKS5ReplyCode.SUCCEEDED: + reply_code = REPLY_CODES.get(response.reply_code, "UNKOWN") + raise ProxyError(f"Proxy Server could not connect: {reply_code}.") + + +class SOCKSProxy(ConnectionPool): + """ + A connection pool that sends requests via an HTTP proxy. + """ + + def __init__( + self, + proxy_url: typing.Union[URL, bytes, str], + proxy_auth: typing.Optional[ + typing.Tuple[typing.Union[bytes, str], typing.Union[bytes, str]] + ] = None, + ssl_context: typing.Optional[ssl.SSLContext] = None, + max_connections: typing.Optional[int] = 10, + max_keepalive_connections: typing.Optional[int] = None, + keepalive_expiry: typing.Optional[float] = None, + http1: bool = True, + http2: bool = False, + retries: int = 0, + network_backend: typing.Optional[NetworkBackend] = None, + ) -> None: + """ + A connection pool for making HTTP requests. + + Parameters: + proxy_url: The URL to use when connecting to the proxy server. + For example `"http://127.0.0.1:8080/"`. + ssl_context: An SSL context to use for verifying connections. + If not specified, the default `httpcore.default_ssl_context()` + will be used. + max_connections: The maximum number of concurrent HTTP connections that + the pool should allow. Any attempt to send a request on a pool that + would exceed this amount will block until a connection is available. + max_keepalive_connections: The maximum number of idle HTTP connections + that will be maintained in the pool. + keepalive_expiry: The duration in seconds that an idle HTTP connection + may be maintained for before being expired from the pool. + http1: A boolean indicating if HTTP/1.1 requests should be supported + by the connection pool. Defaults to True. + http2: A boolean indicating if HTTP/2 requests should be supported by + the connection pool. Defaults to False. + retries: The maximum number of retries when trying to establish + a connection. + local_address: Local address to connect from. Can also be used to + connect using a particular address family. Using + `local_address="0.0.0.0"` will connect using an `AF_INET` address + (IPv4), while using `local_address="::"` will connect using an + `AF_INET6` address (IPv6). + uds: Path to a Unix Domain Socket to use instead of TCP sockets. + network_backend: A backend instance to use for handling network I/O. + """ + super().__init__( + ssl_context=ssl_context, + max_connections=max_connections, + max_keepalive_connections=max_keepalive_connections, + keepalive_expiry=keepalive_expiry, + http1=http1, + http2=http2, + network_backend=network_backend, + retries=retries, + ) + self._ssl_context = ssl_context + self._proxy_url = enforce_url(proxy_url, name="proxy_url") + if proxy_auth is not None: + username, password = proxy_auth + username_bytes = enforce_bytes(username, name="proxy_auth") + password_bytes = enforce_bytes(password, name="proxy_auth") + self._proxy_auth: typing.Optional[typing.Tuple[bytes, bytes]] = ( + username_bytes, + password_bytes, + ) + else: + self._proxy_auth = None + + def create_connection(self, origin: Origin) -> ConnectionInterface: + return Socks5Connection( + proxy_origin=self._proxy_url.origin, + remote_origin=origin, + proxy_auth=self._proxy_auth, + ssl_context=self._ssl_context, + keepalive_expiry=self._keepalive_expiry, + http1=self._http1, + http2=self._http2, + network_backend=self._network_backend, + ) + + +class Socks5Connection(ConnectionInterface): + def __init__( + self, + proxy_origin: Origin, + remote_origin: Origin, + proxy_auth: typing.Optional[typing.Tuple[bytes, bytes]] = None, + ssl_context: typing.Optional[ssl.SSLContext] = None, + keepalive_expiry: typing.Optional[float] = None, + http1: bool = True, + http2: bool = False, + network_backend: typing.Optional[NetworkBackend] = None, + ) -> None: + self._proxy_origin = proxy_origin + self._remote_origin = remote_origin + self._proxy_auth = proxy_auth + self._ssl_context = ssl_context + self._keepalive_expiry = keepalive_expiry + self._http1 = http1 + self._http2 = http2 + + self._network_backend: NetworkBackend = ( + SyncBackend() if network_backend is None else network_backend + ) + self._connect_lock = Lock() + self._connection: typing.Optional[ConnectionInterface] = None + self._connect_failed = False + + def handle_request(self, request: Request) -> Response: + timeouts = request.extensions.get("timeout", {}) + sni_hostname = request.extensions.get("sni_hostname", None) + timeout = timeouts.get("connect", None) + + with self._connect_lock: + if self._connection is None: + try: + # Connect to the proxy + kwargs = { + "host": self._proxy_origin.host.decode("ascii"), + "port": self._proxy_origin.port, + "timeout": timeout, + } + with Trace("connect_tcp", logger, request, kwargs) as trace: + stream = self._network_backend.connect_tcp(**kwargs) + trace.return_value = stream + + # Connect to the remote host using socks5 + kwargs = { + "stream": stream, + "host": self._remote_origin.host.decode("ascii"), + "port": self._remote_origin.port, + "auth": self._proxy_auth, + } + with Trace( + "setup_socks5_connection", logger, request, kwargs + ) as trace: + _init_socks5_connection(**kwargs) + trace.return_value = stream + + # Upgrade the stream to SSL + if self._remote_origin.scheme == b"https": + ssl_context = ( + default_ssl_context() + if self._ssl_context is None + else self._ssl_context + ) + alpn_protocols = ( + ["http/1.1", "h2"] if self._http2 else ["http/1.1"] + ) + ssl_context.set_alpn_protocols(alpn_protocols) + + kwargs = { + "ssl_context": ssl_context, + "server_hostname": sni_hostname + or self._remote_origin.host.decode("ascii"), + "timeout": timeout, + } + with Trace("start_tls", logger, request, kwargs) as trace: + stream = stream.start_tls(**kwargs) + trace.return_value = stream + + # Determine if we should be using HTTP/1.1 or HTTP/2 + ssl_object = stream.get_extra_info("ssl_object") + http2_negotiated = ( + ssl_object is not None + and ssl_object.selected_alpn_protocol() == "h2" + ) + + # Create the HTTP/1.1 or HTTP/2 connection + if http2_negotiated or ( + self._http2 and not self._http1 + ): # pragma: nocover + from .http2 import HTTP2Connection + + self._connection = HTTP2Connection( + origin=self._remote_origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + else: + self._connection = HTTP11Connection( + origin=self._remote_origin, + stream=stream, + keepalive_expiry=self._keepalive_expiry, + ) + except Exception as exc: + self._connect_failed = True + raise exc + elif not self._connection.is_available(): # pragma: nocover + raise ConnectionNotAvailable() + + return self._connection.handle_request(request) + + def can_handle_request(self, origin: Origin) -> bool: + return origin == self._remote_origin + + def close(self) -> None: + if self._connection is not None: + self._connection.close() + + def is_available(self) -> bool: + if self._connection is None: # pragma: nocover + # If HTTP/2 support is enabled, and the resulting connection could + # end up as HTTP/2 then we should indicate the connection as being + # available to service multiple requests. + return ( + self._http2 + and (self._remote_origin.scheme == b"https" or not self._http1) + and not self._connect_failed + ) + return self._connection.is_available() + + def has_expired(self) -> bool: + if self._connection is None: # pragma: nocover + return self._connect_failed + return self._connection.has_expired() + + def is_idle(self) -> bool: + if self._connection is None: # pragma: nocover + return self._connect_failed + return self._connection.is_idle() + + def is_closed(self) -> bool: + if self._connection is None: # pragma: nocover + return self._connect_failed + return self._connection.is_closed() + + def info(self) -> str: + if self._connection is None: # pragma: nocover + return "CONNECTION FAILED" if self._connect_failed else "CONNECTING" + return self._connection.info() + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} [{self.info()}]>" diff --git a/venv/lib/python3.11/site-packages/httpcore/_synchronization.py b/venv/lib/python3.11/site-packages/httpcore/_synchronization.py new file mode 100644 index 0000000..9619a39 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_synchronization.py @@ -0,0 +1,317 @@ +import threading +from types import TracebackType +from typing import Optional, Type + +from ._exceptions import ExceptionMapping, PoolTimeout, map_exceptions + +# Our async synchronization primatives use either 'anyio' or 'trio' depending +# on if they're running under asyncio or trio. + +try: + import trio +except ImportError: # pragma: nocover + trio = None # type: ignore + +try: + import anyio +except ImportError: # pragma: nocover + anyio = None # type: ignore + + +def current_async_library() -> str: + # Determine if we're running under trio or asyncio. + # See https://sniffio.readthedocs.io/en/latest/ + try: + import sniffio + except ImportError: # pragma: nocover + environment = "asyncio" + else: + environment = sniffio.current_async_library() + + if environment not in ("asyncio", "trio"): # pragma: nocover + raise RuntimeError("Running under an unsupported async environment.") + + if environment == "asyncio" and anyio is None: # pragma: nocover + raise RuntimeError( + "Running with asyncio requires installation of 'httpcore[asyncio]'." + ) + + if environment == "trio" and trio is None: # pragma: nocover + raise RuntimeError( + "Running with trio requires installation of 'httpcore[trio]'." + ) + + return environment + + +class AsyncLock: + """ + This is a standard lock. + + In the sync case `Lock` provides thread locking. + In the async case `AsyncLock` provides async locking. + """ + + def __init__(self) -> None: + self._backend = "" + + def setup(self) -> None: + """ + Detect if we're running under 'asyncio' or 'trio' and create + a lock with the correct implementation. + """ + self._backend = current_async_library() + if self._backend == "trio": + self._trio_lock = trio.Lock() + elif self._backend == "asyncio": + self._anyio_lock = anyio.Lock() + + async def __aenter__(self) -> "AsyncLock": + if not self._backend: + self.setup() + + if self._backend == "trio": + await self._trio_lock.acquire() + elif self._backend == "asyncio": + await self._anyio_lock.acquire() + + return self + + async def __aexit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + if self._backend == "trio": + self._trio_lock.release() + elif self._backend == "asyncio": + self._anyio_lock.release() + + +class AsyncThreadLock: + """ + This is a threading-only lock for no-I/O contexts. + + In the sync case `ThreadLock` provides thread locking. + In the async case `AsyncThreadLock` is a no-op. + """ + + def __enter__(self) -> "AsyncThreadLock": + return self + + def __exit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + pass + + +class AsyncEvent: + def __init__(self) -> None: + self._backend = "" + + def setup(self) -> None: + """ + Detect if we're running under 'asyncio' or 'trio' and create + a lock with the correct implementation. + """ + self._backend = current_async_library() + if self._backend == "trio": + self._trio_event = trio.Event() + elif self._backend == "asyncio": + self._anyio_event = anyio.Event() + + def set(self) -> None: + if not self._backend: + self.setup() + + if self._backend == "trio": + self._trio_event.set() + elif self._backend == "asyncio": + self._anyio_event.set() + + async def wait(self, timeout: Optional[float] = None) -> None: + if not self._backend: + self.setup() + + if self._backend == "trio": + trio_exc_map: ExceptionMapping = {trio.TooSlowError: PoolTimeout} + timeout_or_inf = float("inf") if timeout is None else timeout + with map_exceptions(trio_exc_map): + with trio.fail_after(timeout_or_inf): + await self._trio_event.wait() + elif self._backend == "asyncio": + anyio_exc_map: ExceptionMapping = {TimeoutError: PoolTimeout} + with map_exceptions(anyio_exc_map): + with anyio.fail_after(timeout): + await self._anyio_event.wait() + + +class AsyncSemaphore: + def __init__(self, bound: int) -> None: + self._bound = bound + self._backend = "" + + def setup(self) -> None: + """ + Detect if we're running under 'asyncio' or 'trio' and create + a semaphore with the correct implementation. + """ + self._backend = current_async_library() + if self._backend == "trio": + self._trio_semaphore = trio.Semaphore( + initial_value=self._bound, max_value=self._bound + ) + elif self._backend == "asyncio": + self._anyio_semaphore = anyio.Semaphore( + initial_value=self._bound, max_value=self._bound + ) + + async def acquire(self) -> None: + if not self._backend: + self.setup() + + if self._backend == "trio": + await self._trio_semaphore.acquire() + elif self._backend == "asyncio": + await self._anyio_semaphore.acquire() + + async def release(self) -> None: + if self._backend == "trio": + self._trio_semaphore.release() + elif self._backend == "asyncio": + self._anyio_semaphore.release() + + +class AsyncShieldCancellation: + # For certain portions of our codebase where we're dealing with + # closing connections during exception handling we want to shield + # the operation from being cancelled. + # + # with AsyncShieldCancellation(): + # ... # clean-up operations, shielded from cancellation. + + def __init__(self) -> None: + """ + Detect if we're running under 'asyncio' or 'trio' and create + a shielded scope with the correct implementation. + """ + self._backend = current_async_library() + + if self._backend == "trio": + self._trio_shield = trio.CancelScope(shield=True) + elif self._backend == "asyncio": + self._anyio_shield = anyio.CancelScope(shield=True) + + def __enter__(self) -> "AsyncShieldCancellation": + if self._backend == "trio": + self._trio_shield.__enter__() + elif self._backend == "asyncio": + self._anyio_shield.__enter__() + return self + + def __exit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + if self._backend == "trio": + self._trio_shield.__exit__(exc_type, exc_value, traceback) + elif self._backend == "asyncio": + self._anyio_shield.__exit__(exc_type, exc_value, traceback) + + +# Our thread-based synchronization primitives... + + +class Lock: + """ + This is a standard lock. + + In the sync case `Lock` provides thread locking. + In the async case `AsyncLock` provides async locking. + """ + + def __init__(self) -> None: + self._lock = threading.Lock() + + def __enter__(self) -> "Lock": + self._lock.acquire() + return self + + def __exit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + self._lock.release() + + +class ThreadLock: + """ + This is a threading-only lock for no-I/O contexts. + + In the sync case `ThreadLock` provides thread locking. + In the async case `AsyncThreadLock` is a no-op. + """ + + def __init__(self) -> None: + self._lock = threading.Lock() + + def __enter__(self) -> "ThreadLock": + self._lock.acquire() + return self + + def __exit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + self._lock.release() + + +class Event: + def __init__(self) -> None: + self._event = threading.Event() + + def set(self) -> None: + self._event.set() + + def wait(self, timeout: Optional[float] = None) -> None: + if timeout == float("inf"): # pragma: no cover + timeout = None + if not self._event.wait(timeout=timeout): + raise PoolTimeout() # pragma: nocover + + +class Semaphore: + def __init__(self, bound: int) -> None: + self._semaphore = threading.Semaphore(value=bound) + + def acquire(self) -> None: + self._semaphore.acquire() + + def release(self) -> None: + self._semaphore.release() + + +class ShieldCancellation: + # Thread-synchronous codebases don't support cancellation semantics. + # We have this class because we need to mirror the async and sync + # cases within our package, but it's just a no-op. + def __enter__(self) -> "ShieldCancellation": + return self + + def __exit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + pass diff --git a/venv/lib/python3.11/site-packages/httpcore/_trace.py b/venv/lib/python3.11/site-packages/httpcore/_trace.py new file mode 100644 index 0000000..b122a53 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_trace.py @@ -0,0 +1,105 @@ +import inspect +import logging +from types import TracebackType +from typing import Any, Dict, Optional, Type + +from ._models import Request + + +class Trace: + def __init__( + self, + name: str, + logger: logging.Logger, + request: Optional[Request] = None, + kwargs: Optional[Dict[str, Any]] = None, + ) -> None: + self.name = name + self.logger = logger + self.trace_extension = ( + None if request is None else request.extensions.get("trace") + ) + self.debug = self.logger.isEnabledFor(logging.DEBUG) + self.kwargs = kwargs or {} + self.return_value: Any = None + self.should_trace = self.debug or self.trace_extension is not None + self.prefix = self.logger.name.split(".")[-1] + + def trace(self, name: str, info: Dict[str, Any]) -> None: + if self.trace_extension is not None: + prefix_and_name = f"{self.prefix}.{name}" + ret = self.trace_extension(prefix_and_name, info) + if inspect.iscoroutine(ret): # pragma: no cover + raise TypeError( + "If you are using a synchronous interface, " + "the callback of the `trace` extension should " + "be a normal function instead of an asynchronous function." + ) + + if self.debug: + if not info or "return_value" in info and info["return_value"] is None: + message = name + else: + args = " ".join([f"{key}={value!r}" for key, value in info.items()]) + message = f"{name} {args}" + self.logger.debug(message) + + def __enter__(self) -> "Trace": + if self.should_trace: + info = self.kwargs + self.trace(f"{self.name}.started", info) + return self + + def __exit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + if self.should_trace: + if exc_value is None: + info = {"return_value": self.return_value} + self.trace(f"{self.name}.complete", info) + else: + info = {"exception": exc_value} + self.trace(f"{self.name}.failed", info) + + async def atrace(self, name: str, info: Dict[str, Any]) -> None: + if self.trace_extension is not None: + prefix_and_name = f"{self.prefix}.{name}" + coro = self.trace_extension(prefix_and_name, info) + if not inspect.iscoroutine(coro): # pragma: no cover + raise TypeError( + "If you're using an asynchronous interface, " + "the callback of the `trace` extension should " + "be an asynchronous function rather than a normal function." + ) + await coro + + if self.debug: + if not info or "return_value" in info and info["return_value"] is None: + message = name + else: + args = " ".join([f"{key}={value!r}" for key, value in info.items()]) + message = f"{name} {args}" + self.logger.debug(message) + + async def __aenter__(self) -> "Trace": + if self.should_trace: + info = self.kwargs + await self.atrace(f"{self.name}.started", info) + return self + + async def __aexit__( + self, + exc_type: Optional[Type[BaseException]] = None, + exc_value: Optional[BaseException] = None, + traceback: Optional[TracebackType] = None, + ) -> None: + if self.should_trace: + if exc_value is None: + info = {"return_value": self.return_value} + await self.atrace(f"{self.name}.complete", info) + else: + info = {"exception": exc_value} + await self.atrace(f"{self.name}.failed", info) diff --git a/venv/lib/python3.11/site-packages/httpcore/_utils.py b/venv/lib/python3.11/site-packages/httpcore/_utils.py new file mode 100644 index 0000000..df5dea8 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/_utils.py @@ -0,0 +1,36 @@ +import select +import socket +import sys +import typing + + +def is_socket_readable(sock: typing.Optional[socket.socket]) -> bool: + """ + Return whether a socket, as identifed by its file descriptor, is readable. + "A socket is readable" means that the read buffer isn't empty, i.e. that calling + .recv() on it would immediately return some data. + """ + # NOTE: we want check for readability without actually attempting to read, because + # we don't want to block forever if it's not readable. + + # In the case that the socket no longer exists, or cannot return a file + # descriptor, we treat it as being readable, as if it the next read operation + # on it is ready to return the terminating `b""`. + sock_fd = None if sock is None else sock.fileno() + if sock_fd is None or sock_fd < 0: # pragma: nocover + return True + + # The implementation below was stolen from: + # https://github.com/python-trio/trio/blob/20ee2b1b7376db637435d80e266212a35837ddcc/trio/_socket.py#L471-L478 + # See also: https://github.com/encode/httpcore/pull/193#issuecomment-703129316 + + # Use select.select on Windows, and when poll is unavailable and select.poll + # everywhere else. (E.g. When eventlet is in use. See #327) + if ( + sys.platform == "win32" or getattr(select, "poll", None) is None + ): # pragma: nocover + rready, _, _ = select.select([sock_fd], [], [], 0) + return bool(rready) + p = select.poll() + p.register(sock_fd, select.POLLIN) + return bool(p.poll(0)) diff --git a/venv/lib/python3.11/site-packages/httpcore/py.typed b/venv/lib/python3.11/site-packages/httpcore/py.typed new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpcore/py.typed |