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	Twisted trunk makes a change to the `TLSMemoryBIOFactory` where
the underlying protocol is changed from `TLSMemoryBIOProtocol` to
`BufferingTLSTransport` to improve performance of TLS code (see
https://github.com/twisted/twisted/issues/11989).
In order to properly hook this code up in tests we need to pass the test
reactor's clock into `TLSMemoryBIOFactory` to avoid the global (trial)
reactor being used by default.
Twisted does something similar internally for tests:
157cd8e659/src/twisted/web/test/test_agent.py (L871-L874)
		
	
			
		
			
				
	
	
		
			254 lines
		
	
	
		
			9.4 KiB
		
	
	
	
		
			Python
		
	
	
	
	
	
			
		
		
	
	
			254 lines
		
	
	
		
			9.4 KiB
		
	
	
	
		
			Python
		
	
	
	
	
	
# Copyright 2020-2021 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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#     http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import os
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from typing import Any, Optional, Tuple
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from twisted.internet.protocol import Factory
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from twisted.test.proto_helpers import MemoryReactor
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from twisted.web.http import HTTPChannel
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from twisted.web.server import Request
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from synapse.rest import admin
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from synapse.rest.client import login
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from synapse.server import HomeServer
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from synapse.util import Clock
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from tests.http import (
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    TestServerTLSConnectionFactory,
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    get_test_ca_cert_file,
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    wrap_server_factory_for_tls,
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)
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from tests.replication._base import BaseMultiWorkerStreamTestCase
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from tests.server import FakeChannel, FakeTransport, make_request
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from tests.test_utils import SMALL_PNG
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logger = logging.getLogger(__name__)
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test_server_connection_factory: Optional[TestServerTLSConnectionFactory] = None
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class MediaRepoShardTestCase(BaseMultiWorkerStreamTestCase):
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    """Checks running multiple media repos work correctly."""
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    servlets = [
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        admin.register_servlets_for_client_rest_resource,
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        login.register_servlets,
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    ]
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    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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        self.user_id = self.register_user("user", "pass")
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        self.access_token = self.login("user", "pass")
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        self.reactor.lookups["example.com"] = "1.2.3.4"
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    def default_config(self) -> dict:
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        conf = super().default_config()
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        conf["federation_custom_ca_list"] = [get_test_ca_cert_file()]
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        return conf
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    def make_worker_hs(
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        self, worker_app: str, extra_config: Optional[dict] = None, **kwargs: Any
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    ) -> HomeServer:
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        worker_hs = super().make_worker_hs(worker_app, extra_config, **kwargs)
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        # Force the media paths onto the replication resource.
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        worker_hs.get_media_repository_resource().register_servlets(
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            self._hs_to_site[worker_hs].resource, worker_hs
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        )
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        return worker_hs
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    def _get_media_req(
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        self, hs: HomeServer, target: str, media_id: str
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    ) -> Tuple[FakeChannel, Request]:
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        """Request some remote media from the given HS by calling the download
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        API.
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        This then triggers an outbound request from the HS to the target.
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        Returns:
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            The channel for the *client* request and the *outbound* request for
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            the media which the caller should respond to.
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        """
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        channel = make_request(
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            self.reactor,
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            self._hs_to_site[hs],
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            "GET",
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            f"/_matrix/media/r0/download/{target}/{media_id}",
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            shorthand=False,
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            access_token=self.access_token,
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            await_result=False,
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        )
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        self.pump()
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        clients = self.reactor.tcpClients
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        self.assertGreaterEqual(len(clients), 1)
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        (host, port, client_factory, _timeout, _bindAddress) = clients.pop()
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        # build the test server
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        server_factory = Factory.forProtocol(HTTPChannel)
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        # Request.finish expects the factory to have a 'log' method.
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        server_factory.log = _log_request
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        server_tls_protocol = wrap_server_factory_for_tls(
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            server_factory, self.reactor, sanlist=[b"DNS:example.com"]
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        ).buildProtocol(None)
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        # now, tell the client protocol factory to build the client protocol (it will be a
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        # _WrappingProtocol, around a TLSMemoryBIOProtocol, around an
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        # HTTP11ClientProtocol) and wire the output of said protocol up to the server via
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        # a FakeTransport.
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        #
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        # Normally this would be done by the TCP socket code in Twisted, but we are
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        # stubbing that out here.
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        client_protocol = client_factory.buildProtocol(None)
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        client_protocol.makeConnection(
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            FakeTransport(server_tls_protocol, self.reactor, client_protocol)
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        )
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        # tell the server tls protocol to send its stuff back to the client, too
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        server_tls_protocol.makeConnection(
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            FakeTransport(client_protocol, self.reactor, server_tls_protocol)
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        )
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        # fish the test server back out of the server-side TLS protocol.
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        http_server: HTTPChannel = server_tls_protocol.wrappedProtocol
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        # give the reactor a pump to get the TLS juices flowing.
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        self.reactor.pump((0.1,))
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        self.assertEqual(len(http_server.requests), 1)
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        request = http_server.requests[0]
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        self.assertEqual(request.method, b"GET")
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        self.assertEqual(
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            request.path,
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            f"/_matrix/media/r0/download/{target}/{media_id}".encode(),
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        )
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        self.assertEqual(
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            request.requestHeaders.getRawHeaders(b"host"), [target.encode("utf-8")]
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        )
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        return channel, request
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    def test_basic(self) -> None:
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        """Test basic fetching of remote media from a single worker."""
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        hs1 = self.make_worker_hs("synapse.app.generic_worker")
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        channel, request = self._get_media_req(hs1, "example.com:443", "ABC123")
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        request.setResponseCode(200)
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        request.responseHeaders.setRawHeaders(b"Content-Type", [b"text/plain"])
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        request.write(b"Hello!")
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        request.finish()
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        self.pump(0.1)
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        self.assertEqual(channel.code, 200)
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        self.assertEqual(channel.result["body"], b"Hello!")
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    def test_download_simple_file_race(self) -> None:
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        """Test that fetching remote media from two different processes at the
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        same time works.
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        """
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        hs1 = self.make_worker_hs("synapse.app.generic_worker")
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        hs2 = self.make_worker_hs("synapse.app.generic_worker")
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        start_count = self._count_remote_media()
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        # Make two requests without responding to the outbound media requests.
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        channel1, request1 = self._get_media_req(hs1, "example.com:443", "ABC123")
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        channel2, request2 = self._get_media_req(hs2, "example.com:443", "ABC123")
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        # Respond to the first outbound media request and check that the client
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        # request is successful
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        request1.setResponseCode(200)
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        request1.responseHeaders.setRawHeaders(b"Content-Type", [b"text/plain"])
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        request1.write(b"Hello!")
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        request1.finish()
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        self.pump(0.1)
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        self.assertEqual(channel1.code, 200, channel1.result["body"])
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        self.assertEqual(channel1.result["body"], b"Hello!")
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        # Now respond to the second with the same content.
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        request2.setResponseCode(200)
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        request2.responseHeaders.setRawHeaders(b"Content-Type", [b"text/plain"])
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        request2.write(b"Hello!")
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        request2.finish()
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        self.pump(0.1)
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        self.assertEqual(channel2.code, 200, channel2.result["body"])
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        self.assertEqual(channel2.result["body"], b"Hello!")
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        # We expect only one new file to have been persisted.
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        self.assertEqual(start_count + 1, self._count_remote_media())
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    def test_download_image_race(self) -> None:
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        """Test that fetching remote *images* from two different processes at
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        the same time works.
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        This checks that races generating thumbnails are handled correctly.
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        """
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        hs1 = self.make_worker_hs("synapse.app.generic_worker")
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        hs2 = self.make_worker_hs("synapse.app.generic_worker")
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        start_count = self._count_remote_thumbnails()
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        channel1, request1 = self._get_media_req(hs1, "example.com:443", "PIC1")
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        channel2, request2 = self._get_media_req(hs2, "example.com:443", "PIC1")
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        request1.setResponseCode(200)
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        request1.responseHeaders.setRawHeaders(b"Content-Type", [b"image/png"])
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        request1.write(SMALL_PNG)
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        request1.finish()
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        self.pump(0.1)
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        self.assertEqual(channel1.code, 200, channel1.result["body"])
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        self.assertEqual(channel1.result["body"], SMALL_PNG)
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        request2.setResponseCode(200)
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        request2.responseHeaders.setRawHeaders(b"Content-Type", [b"image/png"])
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        request2.write(SMALL_PNG)
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        request2.finish()
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        self.pump(0.1)
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        self.assertEqual(channel2.code, 200, channel2.result["body"])
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        self.assertEqual(channel2.result["body"], SMALL_PNG)
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        # We expect only three new thumbnails to have been persisted.
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        self.assertEqual(start_count + 3, self._count_remote_thumbnails())
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    def _count_remote_media(self) -> int:
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        """Count the number of files in our remote media directory."""
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        path = os.path.join(
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            self.hs.get_media_repository().primary_base_path, "remote_content"
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        )
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        return sum(len(files) for _, _, files in os.walk(path))
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    def _count_remote_thumbnails(self) -> int:
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        """Count the number of files in our remote thumbnails directory."""
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        path = os.path.join(
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            self.hs.get_media_repository().primary_base_path, "remote_thumbnail"
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        )
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        return sum(len(files) for _, _, files in os.walk(path))
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def _log_request(request: Request) -> None:
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    """Implements Factory.log, which is expected by Request.finish"""
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    logger.info("Completed request %s", request)
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