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yt-dlp/test/test_websockets.py

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#!/usr/bin/env python3
# Allow direct execution
import os
import sys
import pytest
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import http.client
import http.cookiejar
import http.server
import json
import random
import ssl
import threading
from yt_dlp import socks
from yt_dlp.cookies import YoutubeDLCookieJar
from yt_dlp.dependencies import websockets
from yt_dlp.networking import Request
from yt_dlp.networking.exceptions import (
CertificateVerifyError,
HTTPError,
ProxyError,
RequestError,
SSLError,
TransportError,
)
from yt_dlp.utils.networking import HTTPHeaderDict
from test.conftest import validate_and_send
TEST_DIR = os.path.dirname(os.path.abspath(__file__))
def websocket_handler(websocket):
for message in websocket:
if isinstance(message, bytes):
if message == b'bytes':
return websocket.send('2')
elif isinstance(message, str):
if message == 'headers':
return websocket.send(json.dumps(dict(websocket.request.headers)))
elif message == 'path':
return websocket.send(websocket.request.path)
elif message == 'source_address':
return websocket.send(websocket.remote_address[0])
elif message == 'str':
return websocket.send('1')
return websocket.send(message)
def process_request(self, request):
if request.path.startswith('/gen_'):
status = http.HTTPStatus(int(request.path[5:]))
if 300 <= status.value <= 300:
return websockets.http11.Response(
status.value, status.phrase, websockets.datastructures.Headers([('Location', '/')]), b'')
return self.protocol.reject(status.value, status.phrase)
return self.protocol.accept(request)
def create_websocket_server(**ws_kwargs):
import websockets.sync.server
wsd = websockets.sync.server.serve(websocket_handler, '127.0.0.1', 0, process_request=process_request, **ws_kwargs)
ws_port = wsd.socket.getsockname()[1]
ws_server_thread = threading.Thread(target=wsd.serve_forever)
ws_server_thread.daemon = True
ws_server_thread.start()
return ws_server_thread, ws_port
def create_ws_websocket_server():
return create_websocket_server()
def create_wss_websocket_server():
certfn = os.path.join(TEST_DIR, 'testcert.pem')
sslctx = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
sslctx.load_cert_chain(certfn, None)
return create_websocket_server(ssl_context=sslctx)
MTLS_CERT_DIR = os.path.join(TEST_DIR, 'testdata', 'certificate')
def create_mtls_wss_websocket_server():
certfn = os.path.join(TEST_DIR, 'testcert.pem')
cacertfn = os.path.join(MTLS_CERT_DIR, 'ca.crt')
sslctx = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
sslctx.verify_mode = ssl.CERT_REQUIRED
sslctx.load_verify_locations(cafile=cacertfn)
sslctx.load_cert_chain(certfn, None)
return create_websocket_server(ssl_context=sslctx)
@pytest.mark.skipif(not websockets, reason='websockets must be installed to test websocket request handlers')
class TestWebsSocketRequestHandlerConformance:
@classmethod
def setup_class(cls):
cls.ws_thread, cls.ws_port = create_ws_websocket_server()
cls.ws_base_url = f'ws://127.0.0.1:{cls.ws_port}'
cls.wss_thread, cls.wss_port = create_wss_websocket_server()
cls.wss_base_url = f'wss://127.0.0.1:{cls.wss_port}'
cls.bad_wss_thread, cls.bad_wss_port = create_websocket_server(ssl_context=ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER))
cls.bad_wss_host = f'wss://127.0.0.1:{cls.bad_wss_port}'
cls.mtls_wss_thread, cls.mtls_wss_port = create_mtls_wss_websocket_server()
cls.mtls_wss_base_url = f'wss://127.0.0.1:{cls.mtls_wss_port}'
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_basic_websockets(self, handler):
with handler() as rh:
ws = validate_and_send(rh, Request(self.ws_base_url))
assert 'upgrade' in ws.headers
assert ws.status == 101
ws.send('foo')
assert ws.recv() == 'foo'
ws.close()
# https://www.rfc-editor.org/rfc/rfc6455.html#section-5.6
@pytest.mark.parametrize('msg,opcode', [('str', 1), (b'bytes', 2)])
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_send_types(self, handler, msg, opcode):
with handler() as rh:
ws = validate_and_send(rh, Request(self.ws_base_url))
ws.send(msg)
assert int(ws.recv()) == opcode
ws.close()
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_verify_cert(self, handler):
with handler() as rh:
with pytest.raises(CertificateVerifyError):
validate_and_send(rh, Request(self.wss_base_url))
with handler(verify=False) as rh:
ws = validate_and_send(rh, Request(self.wss_base_url))
assert ws.status == 101
ws.close()
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_ssl_error(self, handler):
with handler(verify=False) as rh:
with pytest.raises(SSLError, match='sslv3 alert handshake failure') as exc_info:
validate_and_send(rh, Request(self.bad_wss_host))
assert not issubclass(exc_info.type, CertificateVerifyError)
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
@pytest.mark.parametrize('path,expected', [
# Unicode characters should be encoded with uppercase percent-encoding
('/中文', '/%E4%B8%AD%E6%96%87'),
# don't normalize existing percent encodings
('/%c7%9f', '/%c7%9f'),
])
def test_percent_encode(self, handler, path, expected):
with handler() as rh:
ws = validate_and_send(rh, Request(f'{self.ws_base_url}{path}'))
ws.send('path')
assert ws.recv() == expected
assert ws.status == 101
ws.close()
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_remove_dot_segments(self, handler):
with handler() as rh:
# This isn't a comprehensive test,
# but it should be enough to check whether the handler is removing dot segments
ws = validate_and_send(rh, Request(f'{self.ws_base_url}/a/b/./../../test'))
assert ws.status == 101
ws.send('path')
assert ws.recv() == '/test'
ws.close()
# We are restricted to known HTTP status codes in http.HTTPStatus
# Redirects are not supported for websockets
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
@pytest.mark.parametrize('status', (200, 204, 301, 302, 303, 400, 500, 511))
def test_raise_http_error(self, handler, status):
with handler() as rh:
with pytest.raises(HTTPError) as exc_info:
validate_and_send(rh, Request(f'{self.ws_base_url}/gen_{status}'))
assert exc_info.value.status == status
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
@pytest.mark.parametrize('params,extensions', [
({'timeout': 0.00001}, {}),
({}, {'timeout': 0.00001}),
])
def test_timeout(self, handler, params, extensions):
with handler(**params) as rh:
with pytest.raises(TransportError):
validate_and_send(rh, Request(self.ws_base_url, extensions=extensions))
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_cookies(self, handler):
cookiejar = YoutubeDLCookieJar()
cookiejar.set_cookie(http.cookiejar.Cookie(
version=0, name='test', value='ytdlp', port=None, port_specified=False,
domain='127.0.0.1', domain_specified=True, domain_initial_dot=False, path='/',
path_specified=True, secure=False, expires=None, discard=False, comment=None,
comment_url=None, rest={}))
with handler(cookiejar=cookiejar) as rh:
ws = validate_and_send(rh, Request(self.ws_base_url))
ws.send('headers')
assert json.loads(ws.recv())['cookie'] == 'test=ytdlp'
ws.close()
with handler() as rh:
ws = validate_and_send(rh, Request(self.ws_base_url))
ws.send('headers')
assert 'cookie' not in json.loads(ws.recv())
ws.close()
ws = validate_and_send(rh, Request(self.ws_base_url, extensions={'cookiejar': cookiejar}))
ws.send('headers')
assert json.loads(ws.recv())['cookie'] == 'test=ytdlp'
ws.close()
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_source_address(self, handler):
source_address = f'127.0.0.{random.randint(5, 255)}'
with handler(source_address=source_address) as rh:
ws = validate_and_send(rh, Request(self.ws_base_url))
ws.send('source_address')
assert source_address == ws.recv()
ws.close()
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_response_url(self, handler):
with handler() as rh:
url = f'{self.ws_base_url}/something'
ws = validate_and_send(rh, Request(url))
assert ws.url == url
ws.close()
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_request_headers(self, handler):
with handler(headers=HTTPHeaderDict({'test1': 'test', 'test2': 'test2'})) as rh:
# Global Headers
ws = validate_and_send(rh, Request(self.ws_base_url))
ws.send('headers')
headers = HTTPHeaderDict(json.loads(ws.recv()))
assert headers['test1'] == 'test'
ws.close()
# Per request headers, merged with global
ws = validate_and_send(rh, Request(
self.ws_base_url, headers={'test2': 'changed', 'test3': 'test3'}))
ws.send('headers')
headers = HTTPHeaderDict(json.loads(ws.recv()))
assert headers['test1'] == 'test'
assert headers['test2'] == 'changed'
assert headers['test3'] == 'test3'
ws.close()
@pytest.mark.parametrize('client_cert', (
{'client_certificate': os.path.join(MTLS_CERT_DIR, 'clientwithkey.crt')},
{
'client_certificate': os.path.join(MTLS_CERT_DIR, 'client.crt'),
'client_certificate_key': os.path.join(MTLS_CERT_DIR, 'client.key'),
},
{
'client_certificate': os.path.join(MTLS_CERT_DIR, 'clientwithencryptedkey.crt'),
'client_certificate_password': 'foobar',
},
{
'client_certificate': os.path.join(MTLS_CERT_DIR, 'client.crt'),
'client_certificate_key': os.path.join(MTLS_CERT_DIR, 'clientencrypted.key'),
'client_certificate_password': 'foobar',
}
))
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
def test_mtls(self, handler, client_cert):
with handler(
# Disable client-side validation of unacceptable self-signed testcert.pem
# The test is of a check on the server side, so unaffected
verify=False,
client_cert=client_cert
) as rh:
validate_and_send(rh, Request(self.mtls_wss_base_url)).close()
def create_fake_ws_connection(raised):
import websockets.sync.client
class FakeWsConnection(websockets.sync.client.ClientConnection):
def __init__(self, *args, **kwargs):
class FakeResponse:
body = b''
headers = {}
status_code = 101
reason_phrase = 'test'
self.response = FakeResponse()
def send(self, *args, **kwargs):
raise raised()
def recv(self, *args, **kwargs):
raise raised()
def close(self, *args, **kwargs):
return
return FakeWsConnection()
@pytest.mark.parametrize('handler', ['Websockets'], indirect=True)
class TestWebsocketsRequestHandler:
@pytest.mark.parametrize('raised,expected', [
# https://websockets.readthedocs.io/en/stable/reference/exceptions.html
(lambda: websockets.exceptions.InvalidURI(msg='test', uri='test://'), RequestError),
# Requires a response object. Should be covered by HTTP error tests.
# (lambda: websockets.exceptions.InvalidStatus(), TransportError),
(lambda: websockets.exceptions.InvalidHandshake(), TransportError),
# These are subclasses of InvalidHandshake
(lambda: websockets.exceptions.InvalidHeader(name='test'), TransportError),
(lambda: websockets.exceptions.NegotiationError(), TransportError),
# Catch-all
(lambda: websockets.exceptions.WebSocketException(), TransportError),
(lambda: TimeoutError(), TransportError),
# These may be raised by our create_connection implementation, which should also be caught
(lambda: OSError(), TransportError),
(lambda: ssl.SSLError(), SSLError),
(lambda: ssl.SSLCertVerificationError(), CertificateVerifyError),
(lambda: socks.ProxyError(), ProxyError),
])
def test_request_error_mapping(self, handler, monkeypatch, raised, expected):
import websockets.sync.client
import yt_dlp.networking._websockets
with handler() as rh:
def fake_connect(*args, **kwargs):
raise raised()
monkeypatch.setattr(yt_dlp.networking._websockets, 'create_connection', lambda *args, **kwargs: None)
monkeypatch.setattr(websockets.sync.client, 'connect', fake_connect)
with pytest.raises(expected) as exc_info:
rh.send(Request('ws://fake-url'))
assert exc_info.type is expected
@pytest.mark.parametrize('raised,expected,match', [
# https://websockets.readthedocs.io/en/stable/reference/sync/client.html#websockets.sync.client.ClientConnection.send
(lambda: websockets.exceptions.ConnectionClosed(None, None), TransportError, None),
(lambda: RuntimeError(), TransportError, None),
(lambda: TimeoutError(), TransportError, None),
(lambda: TypeError(), RequestError, None),
(lambda: socks.ProxyError(), ProxyError, None),
# Catch-all
(lambda: websockets.exceptions.WebSocketException(), TransportError, None),
])
def test_ws_send_error_mapping(self, handler, monkeypatch, raised, expected, match):
from yt_dlp.networking._websockets import WebsocketsResponseAdapter
ws = WebsocketsResponseAdapter(create_fake_ws_connection(raised), url='ws://fake-url')
with pytest.raises(expected, match=match) as exc_info:
ws.send('test')
assert exc_info.type is expected
@pytest.mark.parametrize('raised,expected,match', [
# https://websockets.readthedocs.io/en/stable/reference/sync/client.html#websockets.sync.client.ClientConnection.recv
(lambda: websockets.exceptions.ConnectionClosed(None, None), TransportError, None),
(lambda: RuntimeError(), TransportError, None),
(lambda: TimeoutError(), TransportError, None),
(lambda: socks.ProxyError(), ProxyError, None),
# Catch-all
(lambda: websockets.exceptions.WebSocketException(), TransportError, None),
])
def test_ws_recv_error_mapping(self, handler, monkeypatch, raised, expected, match):
from yt_dlp.networking._websockets import WebsocketsResponseAdapter
ws = WebsocketsResponseAdapter(create_fake_ws_connection(raised), url='ws://fake-url')
with pytest.raises(expected, match=match) as exc_info:
ws.recv()
assert exc_info.type is expected