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315 lines
10 KiB
Python
315 lines
10 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2019 New Vector Ltd
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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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from mock import Mock
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import treq
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from twisted.internet import defer
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from twisted.internet.protocol import Factory
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from twisted.protocols.tls import TLSMemoryBIOFactory
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from twisted.test.ssl_helpers import ServerTLSContext
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from twisted.web.http import HTTPChannel
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from synapse.crypto.context_factory import ClientTLSOptionsFactory
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from synapse.http.federation.matrix_federation_agent import MatrixFederationAgent
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from synapse.http.federation.srv_resolver import Server
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from synapse.util.logcontext import LoggingContext
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from tests.server import FakeTransport, ThreadedMemoryReactorClock
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from tests.unittest import TestCase
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logger = logging.getLogger(__name__)
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class MatrixFederationAgentTests(TestCase):
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def setUp(self):
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self.reactor = ThreadedMemoryReactorClock()
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self.mock_resolver = Mock()
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self.agent = MatrixFederationAgent(
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reactor=self.reactor,
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tls_client_options_factory=ClientTLSOptionsFactory(None),
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_srv_resolver=self.mock_resolver,
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)
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def _make_connection(self, client_factory, expected_sni):
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"""Builds a test server, and completes the outgoing client connection
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Returns:
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HTTPChannel: the test server
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"""
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# build the test server
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server_tls_protocol = _build_test_server()
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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(FakeTransport(server_tls_protocol, self.reactor))
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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(FakeTransport(client_protocol, self.reactor))
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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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# check the SNI
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server_name = server_tls_protocol._tlsConnection.get_servername()
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self.assertEqual(
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server_name,
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expected_sni,
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"Expected SNI %s but got %s" % (expected_sni, server_name),
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)
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# fish the test server back out of the server-side TLS protocol.
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return server_tls_protocol.wrappedProtocol
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@defer.inlineCallbacks
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def _make_get_request(self, uri):
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"""
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Sends a simple GET request via the agent, and checks its logcontext management
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"""
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with LoggingContext("one") as context:
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fetch_d = self.agent.request(b'GET', uri)
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# Nothing happened yet
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self.assertNoResult(fetch_d)
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# should have reset logcontext to the sentinel
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_check_logcontext(LoggingContext.sentinel)
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try:
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fetch_res = yield fetch_d
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defer.returnValue(fetch_res)
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finally:
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_check_logcontext(context)
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def test_get(self):
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"""
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happy-path test of a GET request with an explicit port
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"""
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self.reactor.lookups["testserv"] = "1.2.3.4"
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test_d = self._make_get_request(b"matrix://testserv:8448/foo/bar")
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# Nothing happened yet
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self.assertNoResult(test_d)
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# Make sure treq is trying to connect
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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(host, port, client_factory, _timeout, _bindAddress) = clients[0]
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self.assertEqual(host, '1.2.3.4')
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self.assertEqual(port, 8448)
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# make a test server, and wire up the client
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http_server = self._make_connection(
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client_factory,
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expected_sni=b"testserv",
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)
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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(request.path, b'/foo/bar')
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content = request.content.read()
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self.assertEqual(content, b'')
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# Deferred is still without a result
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self.assertNoResult(test_d)
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# send the headers
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request.responseHeaders.setRawHeaders(b'Content-Type', [b'application/json'])
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request.write('')
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self.reactor.pump((0.1,))
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response = self.successResultOf(test_d)
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# that should give us a Response object
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self.assertEqual(response.code, 200)
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# Send the body
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request.write('{ "a": 1 }'.encode('ascii'))
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request.finish()
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self.reactor.pump((0.1,))
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# check it can be read
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json = self.successResultOf(treq.json_content(response))
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self.assertEqual(json, {"a": 1})
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def test_get_ip_address(self):
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"""
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Test the behaviour when the server name contains an explicit IP (with no port)
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"""
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# the SRV lookup will return an empty list (XXX: why do we even do an SRV lookup?)
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self.mock_resolver.resolve_service.side_effect = lambda _: []
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# then there will be a getaddrinfo on the IP
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self.reactor.lookups["1.2.3.4"] = "1.2.3.4"
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test_d = self._make_get_request(b"matrix://1.2.3.4/foo/bar")
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# Nothing happened yet
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self.assertNoResult(test_d)
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self.mock_resolver.resolve_service.assert_called_once_with(
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b"_matrix._tcp.1.2.3.4",
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)
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# Make sure treq is trying to connect
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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(host, port, client_factory, _timeout, _bindAddress) = clients[0]
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self.assertEqual(host, '1.2.3.4')
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self.assertEqual(port, 8448)
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# make a test server, and wire up the client
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http_server = self._make_connection(
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client_factory,
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expected_sni=None,
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)
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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(request.path, b'/foo/bar')
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# finish the request
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request.finish()
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self.reactor.pump((0.1,))
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self.successResultOf(test_d)
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def test_get_hostname_no_srv(self):
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"""
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Test the behaviour when the server name has no port, and no SRV record
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"""
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self.mock_resolver.resolve_service.side_effect = lambda _: []
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self.reactor.lookups["testserv"] = "1.2.3.4"
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test_d = self._make_get_request(b"matrix://testserv/foo/bar")
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# Nothing happened yet
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self.assertNoResult(test_d)
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self.mock_resolver.resolve_service.assert_called_once_with(
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b"_matrix._tcp.testserv",
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)
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# Make sure treq is trying to connect
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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(host, port, client_factory, _timeout, _bindAddress) = clients[0]
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self.assertEqual(host, '1.2.3.4')
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self.assertEqual(port, 8448)
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# make a test server, and wire up the client
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http_server = self._make_connection(
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client_factory,
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expected_sni=b'testserv',
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)
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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(request.path, b'/foo/bar')
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# finish the request
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request.finish()
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self.reactor.pump((0.1,))
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self.successResultOf(test_d)
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def test_get_hostname_srv(self):
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"""
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Test the behaviour when there is a single SRV record
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"""
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self.mock_resolver.resolve_service.side_effect = lambda _: [
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Server(host="srvtarget", port=8443)
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]
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self.reactor.lookups["srvtarget"] = "1.2.3.4"
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test_d = self._make_get_request(b"matrix://testserv/foo/bar")
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# Nothing happened yet
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self.assertNoResult(test_d)
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self.mock_resolver.resolve_service.assert_called_once_with(
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b"_matrix._tcp.testserv",
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)
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# Make sure treq is trying to connect
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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(host, port, client_factory, _timeout, _bindAddress) = clients[0]
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self.assertEqual(host, '1.2.3.4')
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self.assertEqual(port, 8443)
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# make a test server, and wire up the client
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http_server = self._make_connection(
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client_factory,
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expected_sni=b'testserv',
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)
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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(request.path, b'/foo/bar')
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# finish the request
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request.finish()
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self.reactor.pump((0.1,))
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self.successResultOf(test_d)
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def _check_logcontext(context):
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current = LoggingContext.current_context()
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if current is not context:
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raise AssertionError(
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"Expected logcontext %s but was %s" % (context, current),
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)
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def _build_test_server():
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"""Construct a test server
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This builds an HTTP channel, wrapped with a TLSMemoryBIOProtocol
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Returns:
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TLSMemoryBIOProtocol
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"""
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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_factory = TLSMemoryBIOFactory(
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ServerTLSContext(), isClient=False, wrappedFactory=server_factory,
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)
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return server_tls_factory.buildProtocol(None)
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def _log_request(request):
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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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