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Editing: client_reqrep.py
import asyncio import codecs import contextlib import functools import io import re import sys import traceback import warnings from hashlib import md5, sha1, sha256 from http.cookies import CookieError, Morsel, SimpleCookie from types import MappingProxyType, TracebackType from typing import ( TYPE_CHECKING, Any, Callable, Dict, Iterable, List, Mapping, Optional, Tuple, Type, Union, cast, ) import attr from multidict import CIMultiDict, CIMultiDictProxy, MultiDict, MultiDictProxy from yarl import URL from . import hdrs, helpers, http, multipart, payload from .abc import AbstractStreamWriter from .client_exceptions import ( ClientConnectionError, ClientOSError, ClientResponseError, ContentTypeError, InvalidURL, ServerFingerprintMismatch, ) from .compression_utils import HAS_BROTLI from .formdata import FormData from .helpers import ( BaseTimerContext, BasicAuth, HeadersMixin, TimerNoop, basicauth_from_netrc, netrc_from_env, noop, reify, set_result, ) from .http import ( SERVER_SOFTWARE, HttpVersion, HttpVersion10, HttpVersion11, StreamWriter, ) from .log import client_logger from .streams import StreamReader from .typedefs import ( DEFAULT_JSON_DECODER, JSONDecoder, LooseCookies, LooseHeaders, RawHeaders, ) try: import ssl from ssl import SSLContext except ImportError: # pragma: no cover ssl = None # type: ignore[assignment] SSLContext = object # type: ignore[misc,assignment] __all__ = ("ClientRequest", "ClientResponse", "RequestInfo", "Fingerprint") if TYPE_CHECKING: from .client import ClientSession from .connector import Connection from .tracing import Trace _CONTAINS_CONTROL_CHAR_RE = re.compile(r"[^-!#$%&'*+.^_`|~0-9a-zA-Z]") json_re = re.compile(r"^application/(?:[\w.+-]+?\+)?json") def _gen_default_accept_encoding() -> str: return "gzip, deflate, br" if HAS_BROTLI else "gzip, deflate" @attr.s(auto_attribs=True, frozen=True, slots=True) class ContentDisposition: type: Optional[str] parameters: "MappingProxyType[str, str]" filename: Optional[str] @attr.s(auto_attribs=True, frozen=True, slots=True) class RequestInfo: url: URL method: str headers: "CIMultiDictProxy[str]" real_url: URL = attr.ib() @real_url.default def real_url_default(self) -> URL: return self.url class Fingerprint: HASHFUNC_BY_DIGESTLEN = { 16: md5, 20: sha1, 32: sha256, } def __init__(self, fingerprint: bytes) -> None: digestlen = len(fingerprint) hashfunc = self.HASHFUNC_BY_DIGESTLEN.get(digestlen) if not hashfunc: raise ValueError("fingerprint has invalid length") elif hashfunc is md5 or hashfunc is sha1: raise ValueError( "md5 and sha1 are insecure and " "not supported. Use sha256." ) self._hashfunc = hashfunc self._fingerprint = fingerprint @property def fingerprint(self) -> bytes: return self._fingerprint def check(self, transport: asyncio.Transport) -> None: if not transport.get_extra_info("sslcontext"): return sslobj = transport.get_extra_info("ssl_object") cert = sslobj.getpeercert(binary_form=True) got = self._hashfunc(cert).digest() if got != self._fingerprint: host, port, *_ = transport.get_extra_info("peername") raise ServerFingerprintMismatch(self._fingerprint, got, host, port) if ssl is not None: SSL_ALLOWED_TYPES = (ssl.SSLContext, bool, Fingerprint, type(None)) else: # pragma: no cover SSL_ALLOWED_TYPES = (bool, type(None)) def _merge_ssl_params( ssl: Union["SSLContext", bool, Fingerprint], verify_ssl: Optional[bool], ssl_context: Optional["SSLContext"], fingerprint: Optional[bytes], ) -> Union["SSLContext", bool, Fingerprint]: if verify_ssl is not None and not verify_ssl: warnings.warn( "verify_ssl is deprecated, use ssl=False instead", DeprecationWarning, stacklevel=3, ) if ssl is not True: raise ValueError( "verify_ssl, ssl_context, fingerprint and ssl " "parameters are mutually exclusive" ) else: ssl = False if ssl_context is not None: warnings.warn( "ssl_context is deprecated, use ssl=context instead", DeprecationWarning, stacklevel=3, ) if ssl is not True: raise ValueError( "verify_ssl, ssl_context, fingerprint and ssl " "parameters are mutually exclusive" ) else: ssl = ssl_context if fingerprint is not None: warnings.warn( "fingerprint is deprecated, " "use ssl=Fingerprint(fingerprint) instead", DeprecationWarning, stacklevel=3, ) if ssl is not True: raise ValueError( "verify_ssl, ssl_context, fingerprint and ssl " "parameters are mutually exclusive" ) else: ssl = Fingerprint(fingerprint) if not isinstance(ssl, SSL_ALLOWED_TYPES): raise TypeError( "ssl should be SSLContext, bool, Fingerprint or None, " "got {!r} instead.".format(ssl) ) return ssl @attr.s(auto_attribs=True, slots=True, frozen=True) class ConnectionKey: # the key should contain an information about used proxy / TLS # to prevent reusing wrong connections from a pool host: str port: Optional[int] is_ssl: bool ssl: Union[SSLContext, bool, Fingerprint] proxy: Optional[URL] proxy_auth: Optional[BasicAuth] proxy_headers_hash: Optional[int] # hash(CIMultiDict) def _is_expected_content_type( response_content_type: str, expected_content_type: str ) -> bool: if expected_content_type == "application/json": return json_re.match(response_content_type) is not None return expected_content_type in response_content_type class ClientRequest: GET_METHODS = { hdrs.METH_GET, hdrs.METH_HEAD, hdrs.METH_OPTIONS, hdrs.METH_TRACE, } POST_METHODS = {hdrs.METH_PATCH, hdrs.METH_POST, hdrs.METH_PUT} ALL_METHODS = GET_METHODS.union(POST_METHODS).union({hdrs.METH_DELETE}) DEFAULT_HEADERS = { hdrs.ACCEPT: "*/*", hdrs.ACCEPT_ENCODING: _gen_default_accept_encoding(), } body = b"" auth = None response = None __writer = None # async task for streaming data _continue = None # waiter future for '100 Continue' response # N.B. # Adding __del__ method with self._writer closing doesn't make sense # because _writer is instance method, thus it keeps a reference to self. # Until writer has finished finalizer will not be called. def __init__( self, method: str, url: URL, *, params: Optional[Mapping[str, str]] = None, headers: Optional[LooseHeaders] = None, skip_auto_headers: Iterable[str] = frozenset(), data: Any = None, cookies: Optional[LooseCookies] = None, auth: Optional[BasicAuth] = None, version: http.HttpVersion = http.HttpVersion11, compress: Optional[str] = None, chunked: Optional[bool] = None, expect100: bool = False, loop: Optional[asyncio.AbstractEventLoop] = None, response_class: Optional[Type["ClientResponse"]] = None, proxy: Optional[URL] = None, proxy_auth: Optional[BasicAuth] = None, timer: Optional[BaseTimerContext] = None, session: Optional["ClientSession"] = None, ssl: Union[SSLContext, bool, Fingerprint] = True, proxy_headers: Optional[LooseHeaders] = None, traces: Optional[List["Trace"]] = None, trust_env: bool = False, server_hostname: Optional[str] = None, ): if loop is None: loop = asyncio.get_event_loop() match = _CONTAINS_CONTROL_CHAR_RE.search(method) if match: raise ValueError( f"Method cannot contain non-token characters {method!r} " "(found at least {match.group()!r})" ) assert isinstance(url, URL), url assert isinstance(proxy, (URL, type(None))), proxy # FIXME: session is None in tests only, need to fix tests # assert session is not None self._session = cast("ClientSession", session) if params: q = MultiDict(url.query) url2 = url.with_query(params) q.extend(url2.query) url = url.with_query(q) self.original_url = url self.url = url.with_fragment(None) self.method = method.upper() self.chunked = chunked self.compress = compress self.loop = loop self.length = None if response_class is None: real_response_class = ClientResponse else: real_response_class = response_class self.response_class: Type[ClientResponse] = real_response_class self._timer = timer if timer is not None else TimerNoop() self._ssl = ssl if ssl is not None else True self.server_hostname = server_hostname if loop.get_debug(): self._source_traceback = traceback.extract_stack(sys._getframe(1)) self.update_version(version) self.update_host(url) self.update_headers(headers) self.update_auto_headers(skip_auto_headers) self.update_cookies(cookies) self.update_content_encoding(data) self.update_auth(auth, trust_env) self.update_proxy(proxy, proxy_auth, proxy_headers) self.update_body_from_data(data) if data is not None or self.method not in self.GET_METHODS: self.update_transfer_encoding() self.update_expect_continue(expect100) if traces is None: traces = [] self._traces = traces def __reset_writer(self, _: object = None) -> None: self.__writer = None @property def _writer(self) -> Optional["asyncio.Task[None]"]: return self.__writer @_writer.setter def _writer(self, writer: Optional["asyncio.Task[None]"]) -> None: if self.__writer is not None: self.__writer.remove_done_callback(self.__reset_writer) self.__writer = writer if writer is not None: writer.add_done_callback(self.__reset_writer) def is_ssl(self) -> bool: return self.url.scheme in ("https", "wss") @property def ssl(self) -> Union["SSLContext", bool, Fingerprint]: return self._ssl @property def connection_key(self) -> ConnectionKey: proxy_headers = self.proxy_headers if proxy_headers: h: Optional[int] = hash(tuple((k, v) for k, v in proxy_headers.items())) else: h = None return ConnectionKey( self.host, self.port, self.is_ssl(), self.ssl, self.proxy, self.proxy_auth, h, ) @property def host(self) -> str: ret = self.url.raw_host assert ret is not None return ret @property def port(self) -> Optional[int]: return self.url.port @property def request_info(self) -> RequestInfo: headers: CIMultiDictProxy[str] = CIMultiDictProxy(self.headers) return RequestInfo(self.url, self.method, headers, self.original_url) def update_host(self, url: URL) -> None: """Update destination host, port and connection type (ssl).""" # get host/port if not url.raw_host: raise InvalidURL(url) # basic auth info username, password = url.user, url.password if username: self.auth = helpers.BasicAuth(username, password or "") def update_version(self, version: Union[http.HttpVersion, str]) -> None: """Convert request version to two elements tuple. parser HTTP version '1.1' => (1, 1) """ if isinstance(version, str): v = [part.strip() for part in version.split(".", 1)] try: version = http.HttpVersion(int(v[0]), int(v[1])) except ValueError: raise ValueError( f"Can not parse http version number: {version}" ) from None self.version = version def update_headers(self, headers: Optional[LooseHeaders]) -> None: """Update request headers.""" self.headers: CIMultiDict[str] = CIMultiDict() # add host netloc = cast(str, self.url.raw_host) if helpers.is_ipv6_address(netloc): netloc = f"[{netloc}]" # See https://github.com/aio-libs/aiohttp/issues/3636. netloc = netloc.rstrip(".") if self.url.port is not None and not self.url.is_default_port(): netloc += ":" + str(self.url.port) self.headers[hdrs.HOST] = netloc if headers: if isinstance(headers, (dict, MultiDictProxy, MultiDict)): headers = headers.items() # type: ignore[assignment] for key, value in headers: # type: ignore[misc] # A special case for Host header if key.lower() == "host": self.headers[key] = value else: self.headers.add(key, value) def update_auto_headers(self, skip_auto_headers: Iterable[str]) -> None: self.skip_auto_headers = CIMultiDict( (hdr, None) for hdr in sorted(skip_auto_headers) ) used_headers = self.headers.copy() used_headers.extend(self.skip_auto_headers) # type: ignore[arg-type] for hdr, val in self.DEFAULT_HEADERS.items(): if hdr not in used_headers: self.headers.add(hdr, val) if hdrs.USER_AGENT not in used_headers: self.headers[hdrs.USER_AGENT] = SERVER_SOFTWARE def update_cookies(self, cookies: Optional[LooseCookies]) -> None: """Update request cookies header.""" if not cookies: return c = SimpleCookie() if hdrs.COOKIE in self.headers: c.load(self.headers.get(hdrs.COOKIE, "")) del self.headers[hdrs.COOKIE] if isinstance(cookies, Mapping): iter_cookies = cookies.items() else: iter_cookies = cookies # type: ignore[assignment] for name, value in iter_cookies: if isinstance(value, Morsel): # Preserve coded_value mrsl_val = value.get(value.key, Morsel()) mrsl_val.set(value.key, value.value, value.coded_value) c[name] = mrsl_val else: c[name] = value # type: ignore[assignment] self.headers[hdrs.COOKIE] = c.output(header="", sep=";").strip() def update_content_encoding(self, data: Any) -> None: """Set request content encoding.""" if data is None: return enc = self.headers.get(hdrs.CONTENT_ENCODING, "").lower() if enc: if self.compress: raise ValueError( "compress can not be set " "if Content-Encoding header is set" ) elif self.compress: if not isinstance(self.compress, str): self.compress = "deflate" self.headers[hdrs.CONTENT_ENCODING] = self.compress self.chunked = True # enable chunked, no need to deal with length def update_transfer_encoding(self) -> None: """Analyze transfer-encoding header.""" te = self.headers.get(hdrs.TRANSFER_ENCODING, "").lower() if "chunked" in te: if self.chunked: raise ValueError( "chunked can not be set " 'if "Transfer-Encoding: chunked" header is set' ) elif self.chunked: if hdrs.CONTENT_LENGTH in self.headers: raise ValueError( "chunked can not be set " "if Content-Length header is set" ) self.headers[hdrs.TRANSFER_ENCODING] = "chunked" else: if hdrs.CONTENT_LENGTH not in self.headers: self.headers[hdrs.CONTENT_LENGTH] = str(len(self.body)) def update_auth(self, auth: Optional[BasicAuth], trust_env: bool = False) -> None: """Set basic auth.""" if auth is None: auth = self.auth if auth is None and trust_env and self.url.host is not None: netrc_obj = netrc_from_env() with contextlib.suppress(LookupError): auth = basicauth_from_netrc(netrc_obj, self.url.host) if auth is None: return if not isinstance(auth, helpers.BasicAuth): raise TypeError("BasicAuth() tuple is required instead") self.headers[hdrs.AUTHORIZATION] = auth.encode() def update_body_from_data(self, body: Any) -> None: if body is None: return # FormData if isinstance(body, FormData): body = body() try: body = payload.PAYLOAD_REGISTRY.get(body, disposition=None) except payload.LookupError: body = FormData(body)() self.body = body # enable chunked encoding if needed if not self.chunked: if hdrs.CONTENT_LENGTH not in self.headers: size = body.size if size is None: self.chunked = True else: if hdrs.CONTENT_LENGTH not in self.headers: self.headers[hdrs.CONTENT_LENGTH] = str(size) # copy payload headers assert body.headers for (key, value) in body.headers.items(): if key in self.headers: continue if key in self.skip_auto_headers: continue self.headers[key] = value def update_expect_continue(self, expect: bool = False) -> None: if expect: self.headers[hdrs.EXPECT] = "100-continue" elif self.headers.get(hdrs.EXPECT, "").lower() == "100-continue": expect = True if expect: self._continue = self.loop.create_future() def update_proxy( self, proxy: Optional[URL], proxy_auth: Optional[BasicAuth], proxy_headers: Optional[LooseHeaders], ) -> None: if proxy_auth and not isinstance(proxy_auth, helpers.BasicAuth): raise ValueError("proxy_auth must be None or BasicAuth() tuple") self.proxy = proxy self.proxy_auth = proxy_auth self.proxy_headers = proxy_headers def keep_alive(self) -> bool: if self.version < HttpVersion10: # keep alive not supported at all return False if self.version == HttpVersion10: if self.headers.get(hdrs.CONNECTION) == "keep-alive": return True else: # no headers means we close for Http 1.0 return False elif self.headers.get(hdrs.CONNECTION) == "close": return False return True async def write_bytes( self, writer: AbstractStreamWriter, conn: "Connection" ) -> None: """Support coroutines that yields bytes objects.""" # 100 response if self._continue is not None: try: await writer.drain() await self._continue except asyncio.CancelledError: return protocol = conn.protocol assert protocol is not None try: if isinstance(self.body, payload.Payload): await self.body.write(writer) else: if isinstance(self.body, (bytes, bytearray)): self.body = (self.body,) # type: ignore[assignment] for chunk in self.body: await writer.write(chunk) # type: ignore[arg-type] except OSError as exc: if exc.errno is None and isinstance(exc, asyncio.TimeoutError): protocol.set_exception(exc) else: new_exc = ClientOSError( exc.errno, "Can not write request body for %s" % self.url ) new_exc.__context__ = exc new_exc.__cause__ = exc protocol.set_exception(new_exc) except asyncio.CancelledError: await writer.write_eof() except Exception as exc: protocol.set_exception(exc) else: await writer.write_eof() protocol.start_timeout() async def send(self, conn: "Connection") -> "ClientResponse": # Specify request target: # - CONNECT request must send authority form URI # - not CONNECT proxy must send absolute form URI # - most common is origin form URI if self.method == hdrs.METH_CONNECT: connect_host = self.url.raw_host assert connect_host is not None if helpers.is_ipv6_address(connect_host): connect_host = f"[{connect_host}]" path = f"{connect_host}:{self.url.port}" elif self.proxy and not self.is_ssl(): path = str(self.url) else: path = self.url.raw_path if self.url.raw_query_string: path += "?" + self.url.raw_query_string protocol = conn.protocol assert protocol is not None writer = StreamWriter( protocol, self.loop, on_chunk_sent=functools.partial( self._on_chunk_request_sent, self.method, self.url ), on_headers_sent=functools.partial( self._on_headers_request_sent, self.method, self.url ), ) if self.compress: writer.enable_compression(self.compress) if self.chunked is not None: writer.enable_chunking() # set default content-type if ( self.method in self.POST_METHODS and hdrs.CONTENT_TYPE not in self.skip_auto_headers and hdrs.CONTENT_TYPE not in self.headers ): self.headers[hdrs.CONTENT_TYPE] = "application/octet-stream" # set the connection header connection = self.headers.get(hdrs.CONNECTION) if not connection: if self.keep_alive(): if self.version == HttpVersion10: connection = "keep-alive" else: if self.version == HttpVersion11: connection = "close" if connection is not None: self.headers[hdrs.CONNECTION] = connection # status + headers status_line = "{0} {1} HTTP/{v.major}.{v.minor}".format( self.method, path, v=self.version ) await writer.write_headers(status_line, self.headers) self._writer = self.loop.create_task(self.write_bytes(writer, conn)) response_class = self.response_class assert response_class is not None self.response = response_class( self.method, self.original_url, writer=self._writer, continue100=self._continue, timer=self._timer, request_info=self.request_info, traces=self._traces, loop=self.loop, session=self._session, ) return self.response async def close(self) -> None: if self._writer is not None: with contextlib.suppress(asyncio.CancelledError): await self._writer def terminate(self) -> None: if self._writer is not None: if not self.loop.is_closed(): self._writer.cancel() self._writer.remove_done_callback(self.__reset_writer) self._writer = None async def _on_chunk_request_sent(self, method: str, url: URL, chunk: bytes) -> None: for trace in self._traces: await trace.send_request_chunk_sent(method, url, chunk) async def _on_headers_request_sent( self, method: str, url: URL, headers: "CIMultiDict[str]" ) -> None: for trace in self._traces: await trace.send_request_headers(method, url, headers) class ClientResponse(HeadersMixin): # Some of these attributes are None when created, # but will be set by the start() method. # As the end user will likely never see the None values, we cheat the types below. # from the Status-Line of the response version: Optional[HttpVersion] = None # HTTP-Version status: int = None # type: ignore[assignment] # Status-Code reason: Optional[str] = None # Reason-Phrase content: StreamReader = None # type: ignore[assignment] # Payload stream _headers: CIMultiDictProxy[str] = None # type: ignore[assignment] _raw_headers: RawHeaders = None # type: ignore[assignment] _connection = None # current connection _source_traceback: Optional[traceback.StackSummary] = None # set up by ClientRequest after ClientResponse object creation # post-init stage allows to not change ctor signature _closed = True # to allow __del__ for non-initialized properly response _released = False __writer = None def __init__( self, method: str, url: URL, *, writer: "asyncio.Task[None]", continue100: Optional["asyncio.Future[bool]"], timer: BaseTimerContext, request_info: RequestInfo, traces: List["Trace"], loop: asyncio.AbstractEventLoop, session: "ClientSession", ) -> None: assert isinstance(url, URL) self.method = method self.cookies = SimpleCookie() self._real_url = url self._url = url.with_fragment(None) self._body: Any = None self._writer: Optional[asyncio.Task[None]] = writer self._continue = continue100 # None by default self._closed = True self._history: Tuple[ClientResponse, ...] = () self._request_info = request_info self._timer = timer if timer is not None else TimerNoop() self._cache: Dict[str, Any] = {} self._traces = traces self._loop = loop # store a reference to session #1985 self._session: Optional[ClientSession] = session # Save reference to _resolve_charset, so that get_encoding() will still # work after the response has finished reading the body. if session is None: # TODO: Fix session=None in tests (see ClientRequest.__init__). self._resolve_charset: Callable[ ["ClientResponse", bytes], str ] = lambda *_: "utf-8" else: self._resolve_charset = session._resolve_charset if loop.get_debug(): self._source_traceback = traceback.extract_stack(sys._getframe(1)) def __reset_writer(self, _: object = None) -> None: self.__writer = None @property def _writer(self) -> Optional["asyncio.Task[None]"]: return self.__writer @_writer.setter def _writer(self, writer: Optional["asyncio.Task[None]"]) -> None: if self.__writer is not None: self.__writer.remove_done_callback(self.__reset_writer) self.__writer = writer if writer is not None: writer.add_done_callback(self.__reset_writer) @reify def url(self) -> URL: return self._url @reify def url_obj(self) -> URL: warnings.warn("Deprecated, use .url #1654", DeprecationWarning, stacklevel=2) return self._url @reify def real_url(self) -> URL: return self._real_url @reify def host(self) -> str: assert self._url.host is not None return self._url.host @reify def headers(self) -> "CIMultiDictProxy[str]": return self._headers @reify def raw_headers(self) -> RawHeaders: return self._raw_headers @reify def request_info(self) -> RequestInfo: return self._request_info @reify def content_disposition(self) -> Optional[ContentDisposition]: raw = self._headers.get(hdrs.CONTENT_DISPOSITION) if raw is None: return None disposition_type, params_dct = multipart.parse_content_disposition(raw) params = MappingProxyType(params_dct) filename = multipart.content_disposition_filename(params) return ContentDisposition(disposition_type, params, filename) def __del__(self, _warnings: Any = warnings) -> None: if self._closed: return if self._connection is not None: self._connection.release() self._cleanup_writer() if self._loop.get_debug(): kwargs = {"source": self} _warnings.warn(f"Unclosed response {self!r}", ResourceWarning, **kwargs) context = {"client_response": self, "message": "Unclosed response"} if self._source_traceback: context["source_traceback"] = self._source_traceback self._loop.call_exception_handler(context) def __repr__(self) -> str: out = io.StringIO() ascii_encodable_url = str(self.url) if self.reason: ascii_encodable_reason = self.reason.encode( "ascii", "backslashreplace" ).decode("ascii") else: ascii_encodable_reason = "None" print( "<ClientResponse({}) [{} {}]>".format( ascii_encodable_url, self.status, ascii_encodable_reason ), file=out, ) print(self.headers, file=out) return out.getvalue() @property def connection(self) -> Optional["Connection"]: return self._connection @reify def history(self) -> Tuple["ClientResponse", ...]: """A sequence of of responses, if redirects occurred.""" return self._history @reify def links(self) -> "MultiDictProxy[MultiDictProxy[Union[str, URL]]]": links_str = ", ".join(self.headers.getall("link", [])) if not links_str: return MultiDictProxy(MultiDict()) links: MultiDict[MultiDictProxy[Union[str, URL]]] = MultiDict() for val in re.split(r",(?=\s*<)", links_str): match = re.match(r"\s*<(.*)>(.*)", val) if match is None: # pragma: no cover # the check exists to suppress mypy error continue url, params_str = match.groups() params = params_str.split(";")[1:] link: MultiDict[Union[str, URL]] = MultiDict() for param in params: match = re.match(r"^\s*(\S*)\s*=\s*(['\"]?)(.*?)(\2)\s*$", param, re.M) if match is None: # pragma: no cover # the check exists to suppress mypy error continue key, _, value, _ = match.groups() link.add(key, value) key = link.get("rel", url) link.add("url", self.url.join(URL(url))) links.add(str(key), MultiDictProxy(link)) return MultiDictProxy(links) async def start(self, connection: "Connection") -> "ClientResponse": """Start response processing.""" self._closed = False self._protocol = connection.protocol self._connection = connection with self._timer: while True: # read response try: protocol = self._protocol message, payload = await protocol.read() # type: ignore[union-attr] except http.HttpProcessingError as exc: raise ClientResponseError( self.request_info, self.history, status=exc.code, message=exc.message, headers=exc.headers, ) from exc if message.code < 100 or message.code > 199 or message.code == 101: break if self._continue is not None: set_result(self._continue, True) self._continue = None # payload eof handler payload.on_eof(self._response_eof) # response status self.version = message.version self.status = message.code self.reason = message.reason # headers self._headers = message.headers # type is CIMultiDictProxy self._raw_headers = message.raw_headers # type is Tuple[bytes, bytes] # payload self.content = payload # cookies for hdr in self.headers.getall(hdrs.SET_COOKIE, ()): try: self.cookies.load(hdr) except CookieError as exc: client_logger.warning("Can not load response cookies: %s", exc) return self def _response_eof(self) -> None: if self._closed: return # protocol could be None because connection could be detached protocol = self._connection and self._connection.protocol if protocol is not None and protocol.upgraded: return self._closed = True self._cleanup_writer() self._release_connection() @property def closed(self) -> bool: return self._closed def close(self) -> None: if not self._released: self._notify_content() self._closed = True if self._loop is None or self._loop.is_closed(): return self._cleanup_writer() if self._connection is not None: self._connection.close() self._connection = None def release(self) -> Any: if not self._released: self._notify_content() self._closed = True self._cleanup_writer() self._release_connection() return noop() @property def ok(self) -> bool: """Returns ``True`` if ``status`` is less than ``400``, ``False`` if not. This is **not** a check for ``200 OK`` but a check that the response status is under 400. """ return 400 > self.status def raise_for_status(self) -> None: if not self.ok: # reason should always be not None for a started response assert self.reason is not None self.release() raise ClientResponseError( self.request_info, self.history, status=self.status, message=self.reason, headers=self.headers, ) def _release_connection(self) -> None: if self._connection is not None: if self._writer is None: self._connection.release() self._connection = None else: self._writer.add_done_callback(lambda f: self._release_connection()) async def _wait_released(self) -> None: if self._writer is not None: await self._writer self._release_connection() def _cleanup_writer(self) -> None: if self._writer is not None: self._writer.cancel() self._session = None def _notify_content(self) -> None: content = self.content if content and content.exception() is None: content.set_exception(ClientConnectionError("Connection closed")) self._released = True async def wait_for_close(self) -> None: if self._writer is not None: await self._writer self.release() async def read(self) -> bytes: """Read response payload.""" if self._body is None: try: self._body = await self.content.read() for trace in self._traces: await trace.send_response_chunk_received( self.method, self.url, self._body ) except BaseException: self.close() raise elif self._released: # Response explicitly released raise ClientConnectionError("Connection closed") protocol = self._connection and self._connection.protocol if protocol is None or not protocol.upgraded: await self._wait_released() # Underlying connection released return self._body # type: ignore[no-any-return] def get_encoding(self) -> str: ctype = self.headers.get(hdrs.CONTENT_TYPE, "").lower() mimetype = helpers.parse_mimetype(ctype) encoding = mimetype.parameters.get("charset") if encoding: with contextlib.suppress(LookupError): return codecs.lookup(encoding).name if mimetype.type == "application" and ( mimetype.subtype == "json" or mimetype.subtype == "rdap" ): # RFC 7159 states that the default encoding is UTF-8. # RFC 7483 defines application/rdap+json return "utf-8" if self._body is None: raise RuntimeError( "Cannot compute fallback encoding of a not yet read body" ) return self._resolve_charset(self, self._body) async def text(self, encoding: Optional[str] = None, errors: str = "strict") -> str: """Read response payload and decode.""" if self._body is None: await self.read() if encoding is None: encoding = self.get_encoding() return self._body.decode( # type: ignore[no-any-return,union-attr] encoding, errors=errors ) async def json( self, *, encoding: Optional[str] = None, loads: JSONDecoder = DEFAULT_JSON_DECODER, content_type: Optional[str] = "application/json", ) -> Any: """Read and decodes JSON response.""" if self._body is None: await self.read() if content_type: ctype = self.headers.get(hdrs.CONTENT_TYPE, "").lower() if not _is_expected_content_type(ctype, content_type): raise ContentTypeError( self.request_info, self.history, message=( "Attempt to decode JSON with " "unexpected mimetype: %s" % ctype ), headers=self.headers, ) stripped = self._body.strip() # type: ignore[union-attr] if not stripped: return None if encoding is None: encoding = self.get_encoding() return loads(stripped.decode(encoding)) async def __aenter__(self) -> "ClientResponse": return self async def __aexit__( self, exc_type: Optional[Type[BaseException]], exc_val: Optional[BaseException], exc_tb: Optional[TracebackType], ) -> None: # similar to _RequestContextManager, we do not need to check # for exceptions, response object can close connection # if state is broken self.release() await self.wait_for_close()
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