"""HTTP Client for asyncio."""
import asyncio
import base64
import hashlib
import json
import os
import sys
import traceback
import warnings
from contextlib import suppress
from types import SimpleNamespace, TracebackType
from typing import (
TYPE_CHECKING,
Any,
Awaitable,
Callable,
Coroutine,
Final,
FrozenSet,
Generator,
Generic,
Iterable,
List,
Mapping,
Optional,
Set,
Tuple,
Type,
TypeVar,
Union,
)
import attr
from multidict import CIMultiDict, MultiDict, MultiDictProxy, istr
from yarl import URL
from . import hdrs, http, payload
from .abc import AbstractCookieJar
from .client_exceptions import (
ClientConnectionError as ClientConnectionError,
ClientConnectorCertificateError as ClientConnectorCertificateError,
ClientConnectorError as ClientConnectorError,
ClientConnectorSSLError as ClientConnectorSSLError,
ClientError as ClientError,
ClientHttpProxyError as ClientHttpProxyError,
ClientOSError as ClientOSError,
ClientPayloadError as ClientPayloadError,
ClientProxyConnectionError as ClientProxyConnectionError,
ClientResponseError as ClientResponseError,
ClientSSLError as ClientSSLError,
ContentTypeError as ContentTypeError,
InvalidURL as InvalidURL,
ServerConnectionError as ServerConnectionError,
ServerDisconnectedError as ServerDisconnectedError,
ServerFingerprintMismatch as ServerFingerprintMismatch,
ServerTimeoutError as ServerTimeoutError,
TooManyRedirects as TooManyRedirects,
WSServerHandshakeError as WSServerHandshakeError,
)
from .client_reqrep import (
ClientRequest as ClientRequest,
ClientResponse as ClientResponse,
Fingerprint as Fingerprint,
RequestInfo as RequestInfo,
_merge_ssl_params,
)
from .client_ws import ClientWebSocketResponse as ClientWebSocketResponse
from .connector import (
BaseConnector as BaseConnector,
NamedPipeConnector as NamedPipeConnector,
TCPConnector as TCPConnector,
UnixConnector as UnixConnector,
)
from .cookiejar import CookieJar
from .helpers import (
_SENTINEL,
DEBUG,
BasicAuth,
TimeoutHandle,
ceil_timeout,
get_env_proxy_for_url,
get_running_loop,
method_must_be_empty_body,
sentinel,
strip_auth_from_url,
)
from .http import WS_KEY, HttpVersion, WebSocketReader, WebSocketWriter
from .http_websocket import WSHandshakeError, WSMessage, ws_ext_gen, ws_ext_parse
from .streams import FlowControlDataQueue
from .tracing import Trace, TraceConfig
from .typedefs import JSONEncoder, LooseCookies, LooseHeaders, StrOrURL
__all__ = (
# client_exceptions
"ClientConnectionError",
"ClientConnectorCertificateError",
"ClientConnectorError",
"ClientConnectorSSLError",
"ClientError",
"ClientHttpProxyError",
"ClientOSError",
"ClientPayloadError",
"ClientProxyConnectionError",
"ClientResponseError",
"ClientSSLError",
"ContentTypeError",
"InvalidURL",
"ServerConnectionError",
"ServerDisconnectedError",
"ServerFingerprintMismatch",
"ServerTimeoutError",
"TooManyRedirects",
"WSServerHandshakeError",
# client_reqrep
"ClientRequest",
"ClientResponse",
"Fingerprint",
"RequestInfo",
# connector
"BaseConnector",
"TCPConnector",
"UnixConnector",
"NamedPipeConnector",
# client_ws
"ClientWebSocketResponse",
# client
"ClientSession",
"ClientTimeout",
"request",
)
if TYPE_CHECKING:
from ssl import SSLContext
else:
SSLContext = None
[docs]
@attr.s(auto_attribs=True, frozen=True, slots=True)
class ClientTimeout:
total: Optional[float] = None
connect: Optional[float] = None
sock_read: Optional[float] = None
sock_connect: Optional[float] = None
ceil_threshold: float = 5
# pool_queue_timeout: Optional[float] = None
# dns_resolution_timeout: Optional[float] = None
# socket_connect_timeout: Optional[float] = None
# connection_acquiring_timeout: Optional[float] = None
# new_connection_timeout: Optional[float] = None
# http_header_timeout: Optional[float] = None
# response_body_timeout: Optional[float] = None
# to create a timeout specific for a single request, either
# - create a completely new one to overwrite the default
# - or use http://www.attrs.org/en/stable/api.html#attr.evolve
# to overwrite the defaults
# 5 Minute default read timeout
DEFAULT_TIMEOUT: Final[ClientTimeout] = ClientTimeout(total=5 * 60)
_RetType = TypeVar("_RetType")
_CharsetResolver = Callable[[ClientResponse, bytes], str]
[docs]
class ClientSession:
"""First-class interface for making HTTP requests."""
ATTRS = frozenset(
[
"_base_url",
"_source_traceback",
"_connector",
"requote_redirect_url",
"_loop",
"_cookie_jar",
"_connector_owner",
"_default_auth",
"_version",
"_json_serialize",
"_requote_redirect_url",
"_timeout",
"_raise_for_status",
"_auto_decompress",
"_trust_env",
"_default_headers",
"_skip_auto_headers",
"_request_class",
"_response_class",
"_ws_response_class",
"_trace_configs",
"_read_bufsize",
"_max_line_size",
"_max_field_size",
"_resolve_charset",
]
)
_source_traceback: Optional[traceback.StackSummary] = None
_connector: Optional[BaseConnector] = None
def __init__(
self,
base_url: Optional[StrOrURL] = None,
*,
connector: Optional[BaseConnector] = None,
loop: Optional[asyncio.AbstractEventLoop] = None,
cookies: Optional[LooseCookies] = None,
headers: Optional[LooseHeaders] = None,
skip_auto_headers: Optional[Iterable[str]] = None,
auth: Optional[BasicAuth] = None,
json_serialize: JSONEncoder = json.dumps,
request_class: Type[ClientRequest] = ClientRequest,
response_class: Type[ClientResponse] = ClientResponse,
ws_response_class: Type[ClientWebSocketResponse] = ClientWebSocketResponse,
version: HttpVersion = http.HttpVersion11,
cookie_jar: Optional[AbstractCookieJar] = None,
connector_owner: bool = True,
raise_for_status: Union[
bool, Callable[[ClientResponse], Awaitable[None]]
] = False,
read_timeout: Union[float, _SENTINEL] = sentinel,
conn_timeout: Optional[float] = None,
timeout: Union[object, ClientTimeout] = sentinel,
auto_decompress: bool = True,
trust_env: bool = False,
requote_redirect_url: bool = True,
trace_configs: Optional[List[TraceConfig]] = None,
read_bufsize: int = 2**16,
max_line_size: int = 8190,
max_field_size: int = 8190,
fallback_charset_resolver: _CharsetResolver = lambda r, b: "utf-8",
) -> None:
# We initialise _connector to None immediately, as it's referenced in __del__()
# and could cause issues if an exception occurs during initialisation.
self._connector: Optional[BaseConnector] = None
if timeout is sentinel or timeout is None:
self._timeout = DEFAULT_TIMEOUT
if read_timeout is not sentinel:
warnings.warn(
"read_timeout is deprecated, " "use timeout argument instead",
DeprecationWarning,
stacklevel=2,
)
self._timeout = attr.evolve(self._timeout, total=read_timeout)
if conn_timeout is not None:
self._timeout = attr.evolve(self._timeout, connect=conn_timeout)
warnings.warn(
"conn_timeout is deprecated, " "use timeout argument instead",
DeprecationWarning,
stacklevel=2,
)
else:
if not isinstance(timeout, ClientTimeout):
raise ValueError(
f"timeout parameter cannot be of {type(timeout)} type, "
"please use 'timeout=ClientTimeout(...)'",
)
self._timeout = timeout
if read_timeout is not sentinel:
raise ValueError(
"read_timeout and timeout parameters "
"conflict, please setup "
"timeout.read"
)
if conn_timeout is not None:
raise ValueError(
"conn_timeout and timeout parameters "
"conflict, please setup "
"timeout.connect"
)
if loop is None:
if connector is not None:
loop = connector._loop
loop = get_running_loop(loop)
if base_url is None or isinstance(base_url, URL):
self._base_url: Optional[URL] = base_url
else:
self._base_url = URL(base_url)
assert (
self._base_url.origin() == self._base_url
), "Only absolute URLs without path part are supported"
if connector is None:
connector = TCPConnector(loop=loop)
if connector._loop is not loop:
raise RuntimeError("Session and connector has to use same event loop")
self._loop = loop
if loop.get_debug():
self._source_traceback = traceback.extract_stack(sys._getframe(1))
if cookie_jar is None:
cookie_jar = CookieJar(loop=loop)
self._cookie_jar = cookie_jar
if cookies is not None:
self._cookie_jar.update_cookies(cookies)
self._connector = connector
self._connector_owner = connector_owner
self._default_auth = auth
self._version = version
self._json_serialize = json_serialize
self._raise_for_status = raise_for_status
self._auto_decompress = auto_decompress
self._trust_env = trust_env
self._requote_redirect_url = requote_redirect_url
self._read_bufsize = read_bufsize
self._max_line_size = max_line_size
self._max_field_size = max_field_size
# Convert to list of tuples
if headers:
real_headers: CIMultiDict[str] = CIMultiDict(headers)
else:
real_headers = CIMultiDict()
self._default_headers: CIMultiDict[str] = real_headers
if skip_auto_headers is not None:
self._skip_auto_headers = frozenset(istr(i) for i in skip_auto_headers)
else:
self._skip_auto_headers = frozenset()
self._request_class = request_class
self._response_class = response_class
self._ws_response_class = ws_response_class
self._trace_configs = trace_configs or []
for trace_config in self._trace_configs:
trace_config.freeze()
self._resolve_charset = fallback_charset_resolver
def __init_subclass__(cls: Type["ClientSession"]) -> None:
warnings.warn(
"Inheritance class {} from ClientSession "
"is discouraged".format(cls.__name__),
DeprecationWarning,
stacklevel=2,
)
if DEBUG:
def __setattr__(self, name: str, val: Any) -> None:
if name not in self.ATTRS:
warnings.warn(
"Setting custom ClientSession.{} attribute "
"is discouraged".format(name),
DeprecationWarning,
stacklevel=2,
)
super().__setattr__(name, val)
def __del__(self, _warnings: Any = warnings) -> None:
if not self.closed:
kwargs = {"source": self}
_warnings.warn(
f"Unclosed client session {self!r}", ResourceWarning, **kwargs
)
context = {"client_session": self, "message": "Unclosed client session"}
if self._source_traceback is not None:
context["source_traceback"] = self._source_traceback
self._loop.call_exception_handler(context)
[docs]
def request(
self, method: str, url: StrOrURL, **kwargs: Any
) -> "_RequestContextManager":
"""Perform HTTP request."""
return _RequestContextManager(self._request(method, url, **kwargs))
def _build_url(self, str_or_url: StrOrURL) -> URL:
url = URL(str_or_url)
if self._base_url is None:
return url
else:
assert not url.is_absolute() and url.path.startswith("/")
return self._base_url.join(url)
async def _request(
self,
method: str,
str_or_url: StrOrURL,
*,
params: Optional[Mapping[str, str]] = None,
data: Any = None,
json: Any = None,
cookies: Optional[LooseCookies] = None,
headers: Optional[LooseHeaders] = None,
skip_auto_headers: Optional[Iterable[str]] = None,
auth: Optional[BasicAuth] = None,
allow_redirects: bool = True,
max_redirects: int = 10,
compress: Optional[str] = None,
chunked: Optional[bool] = None,
expect100: bool = False,
raise_for_status: Union[
None, bool, Callable[[ClientResponse], Awaitable[None]]
] = None,
read_until_eof: bool = True,
proxy: Optional[StrOrURL] = None,
proxy_auth: Optional[BasicAuth] = None,
timeout: Union[ClientTimeout, _SENTINEL] = sentinel,
verify_ssl: Optional[bool] = None,
fingerprint: Optional[bytes] = None,
ssl_context: Optional[SSLContext] = None,
ssl: Union[SSLContext, bool, Fingerprint] = True,
server_hostname: Optional[str] = None,
proxy_headers: Optional[LooseHeaders] = None,
trace_request_ctx: Optional[SimpleNamespace] = None,
read_bufsize: Optional[int] = None,
auto_decompress: Optional[bool] = None,
max_line_size: Optional[int] = None,
max_field_size: Optional[int] = None,
) -> ClientResponse:
# NOTE: timeout clamps existing connect and read timeouts. We cannot
# set the default to None because we need to detect if the user wants
# to use the existing timeouts by setting timeout to None.
if self.closed:
raise RuntimeError("Session is closed")
ssl = _merge_ssl_params(ssl, verify_ssl, ssl_context, fingerprint)
if data is not None and json is not None:
raise ValueError(
"data and json parameters can not be used at the same time"
)
elif json is not None:
data = payload.JsonPayload(json, dumps=self._json_serialize)
if not isinstance(chunked, bool) and chunked is not None:
warnings.warn("Chunk size is deprecated #1615", DeprecationWarning)
redirects = 0
history = []
version = self._version
params = params or {}
# Merge with default headers and transform to CIMultiDict
headers = self._prepare_headers(headers)
proxy_headers = self._prepare_headers(proxy_headers)
try:
url = self._build_url(str_or_url)
except ValueError as e:
raise InvalidURL(str_or_url) from e
skip_headers = set(self._skip_auto_headers)
if skip_auto_headers is not None:
for i in skip_auto_headers:
skip_headers.add(istr(i))
if proxy is not None:
try:
proxy = URL(proxy)
except ValueError as e:
raise InvalidURL(proxy) from e
if timeout is sentinel:
real_timeout: ClientTimeout = self._timeout
else:
if not isinstance(timeout, ClientTimeout):
real_timeout = ClientTimeout(total=timeout)
else:
real_timeout = timeout
# timeout is cumulative for all request operations
# (request, redirects, responses, data consuming)
tm = TimeoutHandle(
self._loop, real_timeout.total, ceil_threshold=real_timeout.ceil_threshold
)
handle = tm.start()
if read_bufsize is None:
read_bufsize = self._read_bufsize
if auto_decompress is None:
auto_decompress = self._auto_decompress
if max_line_size is None:
max_line_size = self._max_line_size
if max_field_size is None:
max_field_size = self._max_field_size
traces = [
Trace(
self,
trace_config,
trace_config.trace_config_ctx(trace_request_ctx=trace_request_ctx),
)
for trace_config in self._trace_configs
]
for trace in traces:
await trace.send_request_start(method, url.update_query(params), headers)
timer = tm.timer()
try:
with timer:
while True:
url, auth_from_url = strip_auth_from_url(url)
if auth and auth_from_url:
raise ValueError(
"Cannot combine AUTH argument with "
"credentials encoded in URL"
)
if auth is None:
auth = auth_from_url
if auth is None:
auth = self._default_auth
# It would be confusing if we support explicit
# Authorization header with auth argument
if (
headers is not None
and auth is not None
and hdrs.AUTHORIZATION in headers
):
raise ValueError(
"Cannot combine AUTHORIZATION header "
"with AUTH argument or credentials "
"encoded in URL"
)
all_cookies = self._cookie_jar.filter_cookies(url)
if cookies is not None:
tmp_cookie_jar = CookieJar()
tmp_cookie_jar.update_cookies(cookies)
req_cookies = tmp_cookie_jar.filter_cookies(url)
if req_cookies:
all_cookies.load(req_cookies)
if proxy is not None:
proxy = URL(proxy)
elif self._trust_env:
with suppress(LookupError):
proxy, proxy_auth = get_env_proxy_for_url(url)
req = self._request_class(
method,
url,
params=params,
headers=headers,
skip_auto_headers=skip_headers,
data=data,
cookies=all_cookies,
auth=auth,
version=version,
compress=compress,
chunked=chunked,
expect100=expect100,
loop=self._loop,
response_class=self._response_class,
proxy=proxy,
proxy_auth=proxy_auth,
timer=timer,
session=self,
ssl=ssl if ssl is not None else True,
server_hostname=server_hostname,
proxy_headers=proxy_headers,
traces=traces,
trust_env=self.trust_env,
)
# connection timeout
try:
async with ceil_timeout(
real_timeout.connect,
ceil_threshold=real_timeout.ceil_threshold,
):
assert self._connector is not None
conn = await self._connector.connect(
req, traces=traces, timeout=real_timeout
)
except asyncio.TimeoutError as exc:
raise ServerTimeoutError(
"Connection timeout " "to host {}".format(url)
) from exc
assert conn.transport is not None
assert conn.protocol is not None
conn.protocol.set_response_params(
timer=timer,
skip_payload=method_must_be_empty_body(method),
read_until_eof=read_until_eof,
auto_decompress=auto_decompress,
read_timeout=real_timeout.sock_read,
read_bufsize=read_bufsize,
timeout_ceil_threshold=self._connector._timeout_ceil_threshold,
max_line_size=max_line_size,
max_field_size=max_field_size,
)
try:
try:
resp = await req.send(conn)
try:
await resp.start(conn)
except BaseException:
resp.close()
raise
except BaseException:
conn.close()
raise
except ClientError:
raise
except OSError as exc:
if exc.errno is None and isinstance(exc, asyncio.TimeoutError):
raise
raise ClientOSError(*exc.args) from exc
self._cookie_jar.update_cookies(resp.cookies, resp.url)
# redirects
if resp.status in (301, 302, 303, 307, 308) and allow_redirects:
for trace in traces:
await trace.send_request_redirect(
method, url.update_query(params), headers, resp
)
redirects += 1
history.append(resp)
if max_redirects and redirects >= max_redirects:
resp.close()
raise TooManyRedirects(
history[0].request_info, tuple(history)
)
# For 301 and 302, mimic IE, now changed in RFC
# https://github.com/kennethreitz/requests/pull/269
if (resp.status == 303 and resp.method != hdrs.METH_HEAD) or (
resp.status in (301, 302) and resp.method == hdrs.METH_POST
):
method = hdrs.METH_GET
data = None
if headers.get(hdrs.CONTENT_LENGTH):
headers.pop(hdrs.CONTENT_LENGTH)
r_url = resp.headers.get(hdrs.LOCATION) or resp.headers.get(
hdrs.URI
)
if r_url is None:
# see github.com/aio-libs/aiohttp/issues/2022
break
else:
# reading from correct redirection
# response is forbidden
resp.release()
try:
parsed_url = URL(
r_url, encoded=not self._requote_redirect_url
)
except ValueError as e:
raise InvalidURL(r_url) from e
scheme = parsed_url.scheme
if scheme not in ("http", "https", ""):
resp.close()
raise ValueError("Can redirect only to http or https")
elif not scheme:
parsed_url = url.join(parsed_url)
if url.origin() != parsed_url.origin():
auth = None
headers.pop(hdrs.AUTHORIZATION, None)
url = parsed_url
params = {}
resp.release()
continue
break
# check response status
if raise_for_status is None:
raise_for_status = self._raise_for_status
if raise_for_status is None:
pass
elif callable(raise_for_status):
await raise_for_status(resp)
elif raise_for_status:
resp.raise_for_status()
# register connection
if handle is not None:
if resp.connection is not None:
resp.connection.add_callback(handle.cancel)
else:
handle.cancel()
resp._history = tuple(history)
for trace in traces:
await trace.send_request_end(
method, url.update_query(params), headers, resp
)
return resp
except BaseException as e:
# cleanup timer
tm.close()
if handle:
handle.cancel()
handle = None
for trace in traces:
await trace.send_request_exception(
method, url.update_query(params), headers, e
)
raise
[docs]
def ws_connect(
self,
url: StrOrURL,
*,
method: str = hdrs.METH_GET,
protocols: Iterable[str] = (),
timeout: float = 10.0,
receive_timeout: Optional[float] = None,
autoclose: bool = True,
autoping: bool = True,
heartbeat: Optional[float] = None,
auth: Optional[BasicAuth] = None,
origin: Optional[str] = None,
params: Optional[Mapping[str, str]] = None,
headers: Optional[LooseHeaders] = None,
proxy: Optional[StrOrURL] = None,
proxy_auth: Optional[BasicAuth] = None,
ssl: Union[SSLContext, bool, None, Fingerprint] = True,
verify_ssl: Optional[bool] = None,
fingerprint: Optional[bytes] = None,
ssl_context: Optional[SSLContext] = None,
proxy_headers: Optional[LooseHeaders] = None,
compress: int = 0,
max_msg_size: int = 4 * 1024 * 1024,
) -> "_WSRequestContextManager":
"""Initiate websocket connection."""
return _WSRequestContextManager(
self._ws_connect(
url,
method=method,
protocols=protocols,
timeout=timeout,
receive_timeout=receive_timeout,
autoclose=autoclose,
autoping=autoping,
heartbeat=heartbeat,
auth=auth,
origin=origin,
params=params,
headers=headers,
proxy=proxy,
proxy_auth=proxy_auth,
ssl=ssl,
verify_ssl=verify_ssl,
fingerprint=fingerprint,
ssl_context=ssl_context,
proxy_headers=proxy_headers,
compress=compress,
max_msg_size=max_msg_size,
)
)
async def _ws_connect(
self,
url: StrOrURL,
*,
method: str = hdrs.METH_GET,
protocols: Iterable[str] = (),
timeout: float = 10.0,
receive_timeout: Optional[float] = None,
autoclose: bool = True,
autoping: bool = True,
heartbeat: Optional[float] = None,
auth: Optional[BasicAuth] = None,
origin: Optional[str] = None,
params: Optional[Mapping[str, str]] = None,
headers: Optional[LooseHeaders] = None,
proxy: Optional[StrOrURL] = None,
proxy_auth: Optional[BasicAuth] = None,
ssl: Optional[Union[SSLContext, bool, Fingerprint]] = True,
verify_ssl: Optional[bool] = None,
fingerprint: Optional[bytes] = None,
ssl_context: Optional[SSLContext] = None,
proxy_headers: Optional[LooseHeaders] = None,
compress: int = 0,
max_msg_size: int = 4 * 1024 * 1024,
) -> ClientWebSocketResponse:
if headers is None:
real_headers: CIMultiDict[str] = CIMultiDict()
else:
real_headers = CIMultiDict(headers)
default_headers = {
hdrs.UPGRADE: "websocket",
hdrs.CONNECTION: "Upgrade",
hdrs.SEC_WEBSOCKET_VERSION: "13",
}
for key, value in default_headers.items():
real_headers.setdefault(key, value)
sec_key = base64.b64encode(os.urandom(16))
real_headers[hdrs.SEC_WEBSOCKET_KEY] = sec_key.decode()
if protocols:
real_headers[hdrs.SEC_WEBSOCKET_PROTOCOL] = ",".join(protocols)
if origin is not None:
real_headers[hdrs.ORIGIN] = origin
if compress:
extstr = ws_ext_gen(compress=compress)
real_headers[hdrs.SEC_WEBSOCKET_EXTENSIONS] = extstr
# For the sake of backward compatibility, if user passes in None, convert it to True
if ssl is None:
ssl = True
ssl = _merge_ssl_params(ssl, verify_ssl, ssl_context, fingerprint)
# send request
resp = await self.request(
method,
url,
params=params,
headers=real_headers,
read_until_eof=False,
auth=auth,
proxy=proxy,
proxy_auth=proxy_auth,
ssl=ssl,
proxy_headers=proxy_headers,
)
try:
# check handshake
if resp.status != 101:
raise WSServerHandshakeError(
resp.request_info,
resp.history,
message="Invalid response status",
status=resp.status,
headers=resp.headers,
)
if resp.headers.get(hdrs.UPGRADE, "").lower() != "websocket":
raise WSServerHandshakeError(
resp.request_info,
resp.history,
message="Invalid upgrade header",
status=resp.status,
headers=resp.headers,
)
if resp.headers.get(hdrs.CONNECTION, "").lower() != "upgrade":
raise WSServerHandshakeError(
resp.request_info,
resp.history,
message="Invalid connection header",
status=resp.status,
headers=resp.headers,
)
# key calculation
r_key = resp.headers.get(hdrs.SEC_WEBSOCKET_ACCEPT, "")
match = base64.b64encode(hashlib.sha1(sec_key + WS_KEY).digest()).decode()
if r_key != match:
raise WSServerHandshakeError(
resp.request_info,
resp.history,
message="Invalid challenge response",
status=resp.status,
headers=resp.headers,
)
# websocket protocol
protocol = None
if protocols and hdrs.SEC_WEBSOCKET_PROTOCOL in resp.headers:
resp_protocols = [
proto.strip()
for proto in resp.headers[hdrs.SEC_WEBSOCKET_PROTOCOL].split(",")
]
for proto in resp_protocols:
if proto in protocols:
protocol = proto
break
# websocket compress
notakeover = False
if compress:
compress_hdrs = resp.headers.get(hdrs.SEC_WEBSOCKET_EXTENSIONS)
if compress_hdrs:
try:
compress, notakeover = ws_ext_parse(compress_hdrs)
except WSHandshakeError as exc:
raise WSServerHandshakeError(
resp.request_info,
resp.history,
message=exc.args[0],
status=resp.status,
headers=resp.headers,
) from exc
else:
compress = 0
notakeover = False
conn = resp.connection
assert conn is not None
conn_proto = conn.protocol
assert conn_proto is not None
transport = conn.transport
assert transport is not None
reader: FlowControlDataQueue[WSMessage] = FlowControlDataQueue(
conn_proto, 2**16, loop=self._loop
)
conn_proto.set_parser(WebSocketReader(reader, max_msg_size), reader)
writer = WebSocketWriter(
conn_proto,
transport,
use_mask=True,
compress=compress,
notakeover=notakeover,
)
except BaseException:
resp.close()
raise
else:
return self._ws_response_class(
reader,
writer,
protocol,
resp,
timeout,
autoclose,
autoping,
self._loop,
receive_timeout=receive_timeout,
heartbeat=heartbeat,
compress=compress,
client_notakeover=notakeover,
)
def _prepare_headers(self, headers: Optional[LooseHeaders]) -> "CIMultiDict[str]":
"""Add default headers and transform it to CIMultiDict"""
# Convert headers to MultiDict
result = CIMultiDict(self._default_headers)
if headers:
if not isinstance(headers, (MultiDictProxy, MultiDict)):
headers = CIMultiDict(headers)
added_names: Set[str] = set()
for key, value in headers.items():
if key in added_names:
result.add(key, value)
else:
result[key] = value
added_names.add(key)
return result
[docs]
def get(
self, url: StrOrURL, *, allow_redirects: bool = True, **kwargs: Any
) -> "_RequestContextManager":
"""Perform HTTP GET request."""
return _RequestContextManager(
self._request(hdrs.METH_GET, url, allow_redirects=allow_redirects, **kwargs)
)
[docs]
def options(
self, url: StrOrURL, *, allow_redirects: bool = True, **kwargs: Any
) -> "_RequestContextManager":
"""Perform HTTP OPTIONS request."""
return _RequestContextManager(
self._request(
hdrs.METH_OPTIONS, url, allow_redirects=allow_redirects, **kwargs
)
)
[docs]
def head(
self, url: StrOrURL, *, allow_redirects: bool = False, **kwargs: Any
) -> "_RequestContextManager":
"""Perform HTTP HEAD request."""
return _RequestContextManager(
self._request(
hdrs.METH_HEAD, url, allow_redirects=allow_redirects, **kwargs
)
)
[docs]
def post(
self, url: StrOrURL, *, data: Any = None, **kwargs: Any
) -> "_RequestContextManager":
"""Perform HTTP POST request."""
return _RequestContextManager(
self._request(hdrs.METH_POST, url, data=data, **kwargs)
)
[docs]
def put(
self, url: StrOrURL, *, data: Any = None, **kwargs: Any
) -> "_RequestContextManager":
"""Perform HTTP PUT request."""
return _RequestContextManager(
self._request(hdrs.METH_PUT, url, data=data, **kwargs)
)
[docs]
def patch(
self, url: StrOrURL, *, data: Any = None, **kwargs: Any
) -> "_RequestContextManager":
"""Perform HTTP PATCH request."""
return _RequestContextManager(
self._request(hdrs.METH_PATCH, url, data=data, **kwargs)
)
[docs]
def delete(self, url: StrOrURL, **kwargs: Any) -> "_RequestContextManager":
"""Perform HTTP DELETE request."""
return _RequestContextManager(self._request(hdrs.METH_DELETE, url, **kwargs))
[docs]
async def close(self) -> None:
"""Close underlying connector.
Release all acquired resources.
"""
if not self.closed:
if self._connector is not None and self._connector_owner:
await self._connector.close()
self._connector = None
@property
def closed(self) -> bool:
"""Is client session closed.
A readonly property.
"""
return self._connector is None or self._connector.closed
@property
def connector(self) -> Optional[BaseConnector]:
"""Connector instance used for the session."""
return self._connector
@property
def cookie_jar(self) -> AbstractCookieJar:
"""The session cookies."""
return self._cookie_jar
@property
def version(self) -> Tuple[int, int]:
"""The session HTTP protocol version."""
return self._version
@property
def requote_redirect_url(self) -> bool:
"""Do URL requoting on redirection handling."""
return self._requote_redirect_url
@requote_redirect_url.setter
def requote_redirect_url(self, val: bool) -> None:
"""Do URL requoting on redirection handling."""
warnings.warn(
"session.requote_redirect_url modification " "is deprecated #2778",
DeprecationWarning,
stacklevel=2,
)
self._requote_redirect_url = val
@property
def loop(self) -> asyncio.AbstractEventLoop:
"""Session's loop."""
warnings.warn(
"client.loop property is deprecated", DeprecationWarning, stacklevel=2
)
return self._loop
@property
def timeout(self) -> ClientTimeout:
"""Timeout for the session."""
return self._timeout
@property
def headers(self) -> "CIMultiDict[str]":
"""The default headers of the client session."""
return self._default_headers
@property
def skip_auto_headers(self) -> FrozenSet[istr]:
"""Headers for which autogeneration should be skipped"""
return self._skip_auto_headers
@property
def auth(self) -> Optional[BasicAuth]:
"""An object that represents HTTP Basic Authorization"""
return self._default_auth
@property
def json_serialize(self) -> JSONEncoder:
"""Json serializer callable"""
return self._json_serialize
@property
def connector_owner(self) -> bool:
"""Should connector be closed on session closing"""
return self._connector_owner
@property
def raise_for_status(
self,
) -> Union[bool, Callable[[ClientResponse], Awaitable[None]]]:
"""Should `ClientResponse.raise_for_status()` be called for each response."""
return self._raise_for_status
@property
def auto_decompress(self) -> bool:
"""Should the body response be automatically decompressed."""
return self._auto_decompress
@property
def trust_env(self) -> bool:
"""
Should proxies information from environment or netrc be trusted.
Information is from HTTP_PROXY / HTTPS_PROXY environment variables
or ~/.netrc file if present.
"""
return self._trust_env
@property
def trace_configs(self) -> List[TraceConfig]:
"""A list of TraceConfig instances used for client tracing"""
return self._trace_configs
[docs]
def detach(self) -> None:
"""Detach connector from session without closing the former.
Session is switched to closed state anyway.
"""
self._connector = None
def __enter__(self) -> None:
raise TypeError("Use async with instead")
def __exit__(
self,
exc_type: Optional[Type[BaseException]],
exc_val: Optional[BaseException],
exc_tb: Optional[TracebackType],
) -> None:
# __exit__ should exist in pair with __enter__ but never executed
pass # pragma: no cover
async def __aenter__(self) -> "ClientSession":
return self
async def __aexit__(
self,
exc_type: Optional[Type[BaseException]],
exc_val: Optional[BaseException],
exc_tb: Optional[TracebackType],
) -> None:
await self.close()
class _BaseRequestContextManager(Coroutine[Any, Any, _RetType], Generic[_RetType]):
__slots__ = ("_coro", "_resp")
def __init__(self, coro: Coroutine["asyncio.Future[Any]", None, _RetType]) -> None:
self._coro = coro
def send(self, arg: None) -> "asyncio.Future[Any]":
return self._coro.send(arg)
def throw(self, *args: Any, **kwargs: Any) -> "asyncio.Future[Any]":
return self._coro.throw(*args, **kwargs)
def close(self) -> None:
return self._coro.close()
def __await__(self) -> Generator[Any, None, _RetType]:
ret = self._coro.__await__()
return ret
def __iter__(self) -> Generator[Any, None, _RetType]:
return self.__await__()
async def __aenter__(self) -> _RetType:
self._resp = await self._coro
return self._resp
class _RequestContextManager(_BaseRequestContextManager[ClientResponse]):
__slots__ = ()
async def __aexit__(
self,
exc_type: Optional[Type[BaseException]],
exc: Optional[BaseException],
tb: Optional[TracebackType],
) -> None:
# We're basing behavior on the exception as it can be caused by
# user code unrelated to the status of the connection. If you
# would like to close a connection you must do that
# explicitly. Otherwise connection error handling should kick in
# and close/recycle the connection as required.
self._resp.release()
await self._resp.wait_for_close()
class _WSRequestContextManager(_BaseRequestContextManager[ClientWebSocketResponse]):
__slots__ = ()
async def __aexit__(
self,
exc_type: Optional[Type[BaseException]],
exc: Optional[BaseException],
tb: Optional[TracebackType],
) -> None:
await self._resp.close()
class _SessionRequestContextManager:
__slots__ = ("_coro", "_resp", "_session")
def __init__(
self,
coro: Coroutine["asyncio.Future[Any]", None, ClientResponse],
session: ClientSession,
) -> None:
self._coro = coro
self._resp: Optional[ClientResponse] = None
self._session = session
async def __aenter__(self) -> ClientResponse:
try:
self._resp = await self._coro
except BaseException:
await self._session.close()
raise
else:
return self._resp
async def __aexit__(
self,
exc_type: Optional[Type[BaseException]],
exc: Optional[BaseException],
tb: Optional[TracebackType],
) -> None:
assert self._resp is not None
self._resp.close()
await self._session.close()
[docs]
def request(
method: str,
url: StrOrURL,
*,
params: Optional[Mapping[str, str]] = None,
data: Any = None,
json: Any = None,
headers: Optional[LooseHeaders] = None,
skip_auto_headers: Optional[Iterable[str]] = None,
auth: Optional[BasicAuth] = None,
allow_redirects: bool = True,
max_redirects: int = 10,
compress: Optional[str] = None,
chunked: Optional[bool] = None,
expect100: bool = False,
raise_for_status: Optional[bool] = None,
read_until_eof: bool = True,
proxy: Optional[StrOrURL] = None,
proxy_auth: Optional[BasicAuth] = None,
timeout: Union[ClientTimeout, object] = sentinel,
cookies: Optional[LooseCookies] = None,
version: HttpVersion = http.HttpVersion11,
connector: Optional[BaseConnector] = None,
read_bufsize: Optional[int] = None,
loop: Optional[asyncio.AbstractEventLoop] = None,
max_line_size: int = 8190,
max_field_size: int = 8190,
) -> _SessionRequestContextManager:
"""Constructs and sends a request.
Returns response object.
method - HTTP method
url - request url
params - (optional) Dictionary or bytes to be sent in the query
string of the new request
data - (optional) Dictionary, bytes, or file-like object to
send in the body of the request
json - (optional) Any json compatible python object
headers - (optional) Dictionary of HTTP Headers to send with
the request
cookies - (optional) Dict object to send with the request
auth - (optional) BasicAuth named tuple represent HTTP Basic Auth
auth - aiohttp.helpers.BasicAuth
allow_redirects - (optional) If set to False, do not follow
redirects
version - Request HTTP version.
compress - Set to True if request has to be compressed
with deflate encoding.
chunked - Set to chunk size for chunked transfer encoding.
expect100 - Expect 100-continue response from server.
connector - BaseConnector sub-class instance to support
connection pooling.
read_until_eof - Read response until eof if response
does not have Content-Length header.
loop - Optional event loop.
timeout - Optional ClientTimeout settings structure, 5min
total timeout by default.
Usage::
>>> import aiohttp
>>> resp = await aiohttp.request('GET', 'http://python.org/')
>>> resp
<ClientResponse(python.org/) [200]>
>>> data = await resp.read()
"""
connector_owner = False
if connector is None:
connector_owner = True
connector = TCPConnector(loop=loop, force_close=True)
session = ClientSession(
loop=loop,
cookies=cookies,
version=version,
timeout=timeout,
connector=connector,
connector_owner=connector_owner,
)
return _SessionRequestContextManager(
session._request(
method,
url,
params=params,
data=data,
json=json,
headers=headers,
skip_auto_headers=skip_auto_headers,
auth=auth,
allow_redirects=allow_redirects,
max_redirects=max_redirects,
compress=compress,
chunked=chunked,
expect100=expect100,
raise_for_status=raise_for_status,
read_until_eof=read_until_eof,
proxy=proxy,
proxy_auth=proxy_auth,
read_bufsize=read_bufsize,
max_line_size=max_line_size,
max_field_size=max_field_size,
),
session,
)
