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from __future__ import annotations
import contextlib
import functools
import io
import logging
import ssl
import sys
from ._helper import (
create_connection,
create_socks_proxy_socket,
make_socks_proxy_opts,
select_proxy,
)
from .common import Features, Response, register_rh
from .exceptions import (
CertificateVerifyError,
HTTPError,
ProxyError,
RequestError,
SSLError,
TransportError,
)
from .websocket import WebSocketRequestHandler, WebSocketResponse
from ..dependencies import websockets
from ..socks import ProxyError as SocksProxyError
from ..utils import int_or_none
if not websockets:
raise ImportError('websockets is not installed')
import websockets.version
websockets_version = tuple(map(int_or_none, websockets.version.version.split('.')))
if websockets_version < (12, 0):
raise ImportError('Only websockets>=12.0 is supported')
import websockets.sync.client
from websockets.uri import parse_uri
# In websockets Connection, recv_exc and recv_events_exc are defined
# after the recv events handler thread is started [1].
# On our CI using PyPy, in some cases a race condition may occur
# where the recv events handler thread tries to use these attributes before they are defined [2].
# 1: https://github.com/python-websockets/websockets/blame/de768cf65e7e2b1a3b67854fb9e08816a5ff7050/src/websockets/sync/connection.py#L93
# 2: "AttributeError: 'ClientConnection' object has no attribute 'recv_events_exc'. Did you mean: 'recv_events'?"
import websockets.sync.connection # isort: split
with contextlib.suppress(Exception):
# > 12.0
websockets.sync.connection.Connection.recv_exc = None
# 12.0
websockets.sync.connection.Connection.recv_events_exc = None
class WebsocketsResponseAdapter(WebSocketResponse):
def __init__(self, ws: websockets.sync.client.ClientConnection, url):
super().__init__(
fp=io.BytesIO(ws.response.body or b''),
url=url,
headers=ws.response.headers,
status=ws.response.status_code,
reason=ws.response.reason_phrase,
)
self._ws = ws
def close(self):
self._ws.close()
super().close()
def send(self, message):
# https://websockets.readthedocs.io/en/stable/reference/sync/client.html#websockets.sync.client.ClientConnection.send
try:
return self._ws.send(message)
except (websockets.exceptions.WebSocketException, RuntimeError, TimeoutError) as e:
raise TransportError(cause=e) from e
except SocksProxyError as e:
raise ProxyError(cause=e) from e
except TypeError as e:
raise RequestError(cause=e) from e
def recv(self):
# https://websockets.readthedocs.io/en/stable/reference/sync/client.html#websockets.sync.client.ClientConnection.recv
try:
return self._ws.recv()
except SocksProxyError as e:
raise ProxyError(cause=e) from e
except (websockets.exceptions.WebSocketException, RuntimeError, TimeoutError) as e:
raise TransportError(cause=e) from e
@register_rh
class WebsocketsRH(WebSocketRequestHandler):
"""
Websockets request handler
https://websockets.readthedocs.io
https://github.com/python-websockets/websockets
"""
_SUPPORTED_URL_SCHEMES = ('wss', 'ws')
_SUPPORTED_PROXY_SCHEMES = ('socks4', 'socks4a', 'socks5', 'socks5h')
_SUPPORTED_FEATURES = (Features.ALL_PROXY, Features.NO_PROXY)
RH_NAME = 'websockets'
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.__logging_handlers = {}
for name in ('websockets.client', 'websockets.server'):
logger = logging.getLogger(name)
handler = logging.StreamHandler(stream=sys.stdout)
handler.setFormatter(logging.Formatter(f'{self.RH_NAME}: %(message)s'))
self.__logging_handlers[name] = handler
logger.addHandler(handler)
if self.verbose:
logger.setLevel(logging.DEBUG)
def _check_extensions(self, extensions):
super()._check_extensions(extensions)
extensions.pop('timeout', None)
extensions.pop('cookiejar', None)
extensions.pop('legacy_ssl', None)
def close(self):
# Remove the logging handler that contains a reference to our logger
# See: https://github.com/yt-dlp/yt-dlp/issues/8922
for name, handler in self.__logging_handlers.items():
logging.getLogger(name).removeHandler(handler)
def _send(self, request):
timeout = self._calculate_timeout(request)
headers = self._merge_headers(request.headers)
if 'cookie' not in headers:
cookiejar = self._get_cookiejar(request)
cookie_header = cookiejar.get_cookie_header(request.url)
if cookie_header:
headers['cookie'] = cookie_header
wsuri = parse_uri(request.url)
create_conn_kwargs = {
'source_address': (self.source_address, 0) if self.source_address else None,
'timeout': timeout,
}
proxy = select_proxy(request.url, self._get_proxies(request))
try:
if proxy:
socks_proxy_options = make_socks_proxy_opts(proxy)
sock = create_connection(
address=(socks_proxy_options['addr'], socks_proxy_options['port']),
_create_socket_func=functools.partial(
create_socks_proxy_socket, (wsuri.host, wsuri.port), socks_proxy_options),
**create_conn_kwargs,
)
else:
sock = create_connection(
address=(wsuri.host, wsuri.port),
**create_conn_kwargs,
)
ssl_ctx = self._make_sslcontext(legacy_ssl_support=request.extensions.get('legacy_ssl'))
conn = websockets.sync.client.connect(
sock=sock,
uri=request.url,
additional_headers=headers,
open_timeout=timeout,
user_agent_header=None,
ssl_context=ssl_ctx if wsuri.secure else None,
close_timeout=0, # not ideal, but prevents yt-dlp hanging
)
return WebsocketsResponseAdapter(conn, url=request.url)
# Exceptions as per https://websockets.readthedocs.io/en/stable/reference/sync/client.html
except SocksProxyError as e:
raise ProxyError(cause=e) from e
except websockets.exceptions.InvalidURI as e:
raise RequestError(cause=e) from e
except ssl.SSLCertVerificationError as e:
raise CertificateVerifyError(cause=e) from e
except ssl.SSLError as e:
raise SSLError(cause=e) from e
except websockets.exceptions.InvalidStatus as e:
raise HTTPError(
Response(
fp=io.BytesIO(e.response.body),
url=request.url,
headers=e.response.headers,
status=e.response.status_code,
reason=e.response.reason_phrase),
) from e
except (OSError, TimeoutError, websockets.exceptions.WebSocketException) as e:
raise TransportError(cause=e) from e
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