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![Richard van der Hoff](/assets/img/avatar_default.png)
* Remove `on_timeout_cancel` from `timeout_deferred` The `on_timeout_cancel` param to `timeout_deferred` wasn't always called on a timeout (in particular if the canceller raised an exception), so it was unreliable. It was also only used in one place, and to be honest it's easier to do what it does a different way. * Fix handling of connection timeouts in outgoing http requests Turns out that if we get a timeout during connection, then a different exception is raised, which wasn't always handled correctly. To fix it, catch the exception in SimpleHttpClient and turn it into a RequestTimedOutError (which is already a documented exception). Also add a description to RequestTimedOutError so that we can see which stage it failed at. * Fix incorrect handling of timeouts reading federation responses This was trapping the wrong sort of TimeoutError, so was never being hit. The effect was relatively minor, but we should fix this so that it does the expected thing. * Fix inconsistent handling of `timeout` param between methods `get_json`, `put_json` and `delete_json` were applying a different timeout to the response body to `post_json`; bring them in line and test. Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com> Co-authored-by: Erik Johnston <erik@matrix.org>
564 lines
18 KiB
Python
564 lines
18 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2018 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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from mock import Mock
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from netaddr import IPSet
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from parameterized import parameterized
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from twisted.internet import defer
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from twisted.internet.defer import TimeoutError
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from twisted.internet.error import ConnectingCancelledError, DNSLookupError
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from twisted.test.proto_helpers import StringTransport
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from twisted.web.client import ResponseNeverReceived
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from twisted.web.http import HTTPChannel
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from synapse.api.errors import RequestSendFailed
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from synapse.http.matrixfederationclient import (
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MatrixFederationHttpClient,
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MatrixFederationRequest,
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)
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from synapse.logging.context import SENTINEL_CONTEXT, LoggingContext, current_context
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from tests.server import FakeTransport
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from tests.unittest import HomeserverTestCase
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def check_logcontext(context):
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current = current_context()
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if current is not context:
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raise AssertionError("Expected logcontext %s but was %s" % (context, current))
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class FederationClientTests(HomeserverTestCase):
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def make_homeserver(self, reactor, clock):
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hs = self.setup_test_homeserver(reactor=reactor, clock=clock)
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return hs
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def prepare(self, reactor, clock, homeserver):
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self.cl = MatrixFederationHttpClient(self.hs, None)
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self.reactor.lookups["testserv"] = "1.2.3.4"
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def test_client_get(self):
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"""
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happy-path test of a GET request
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"""
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@defer.inlineCallbacks
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def do_request():
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with LoggingContext("one") as context:
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fetch_d = defer.ensureDeferred(
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self.cl.get_json("testserv:8008", "foo/bar")
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)
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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(SENTINEL_CONTEXT)
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try:
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fetch_res = yield fetch_d
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return fetch_res
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finally:
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check_logcontext(context)
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test_d = do_request()
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self.pump()
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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, factory, _timeout, _bindAddress) = clients[0]
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self.assertEqual(host, "1.2.3.4")
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self.assertEqual(port, 8008)
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# complete the connection and wire it up to a fake transport
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protocol = factory.buildProtocol(None)
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transport = StringTransport()
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protocol.makeConnection(transport)
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# that should have made it send the request to the transport
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self.assertRegex(transport.value(), b"^GET /foo/bar")
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self.assertRegex(transport.value(), b"Host: testserv:8008")
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# Deferred is still without a result
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self.assertNoResult(test_d)
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# Send it the HTTP response
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res_json = '{ "a": 1 }'.encode("ascii")
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protocol.dataReceived(
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b"HTTP/1.1 200 OK\r\n"
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b"Server: Fake\r\n"
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b"Content-Type: application/json\r\n"
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b"Content-Length: %i\r\n"
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b"\r\n"
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b"%s" % (len(res_json), res_json)
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)
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self.pump()
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res = self.successResultOf(test_d)
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# check the response is as expected
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self.assertEqual(res, {"a": 1})
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def test_dns_error(self):
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"""
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If the DNS lookup returns an error, it will bubble up.
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"""
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d = defer.ensureDeferred(
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self.cl.get_json("testserv2:8008", "foo/bar", timeout=10000)
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)
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self.pump()
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f = self.failureResultOf(d)
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self.assertIsInstance(f.value, RequestSendFailed)
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self.assertIsInstance(f.value.inner_exception, DNSLookupError)
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def test_client_connection_refused(self):
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d = defer.ensureDeferred(
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self.cl.get_json("testserv:8008", "foo/bar", timeout=10000)
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)
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self.pump()
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# Nothing happened yet
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self.assertNoResult(d)
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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(host, port, factory, _timeout, _bindAddress) = clients[0]
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self.assertEqual(host, "1.2.3.4")
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self.assertEqual(port, 8008)
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e = Exception("go away")
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factory.clientConnectionFailed(None, e)
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self.pump(0.5)
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f = self.failureResultOf(d)
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self.assertIsInstance(f.value, RequestSendFailed)
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self.assertIs(f.value.inner_exception, e)
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def test_client_never_connect(self):
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"""
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If the HTTP request is not connected and is timed out, it'll give a
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ConnectingCancelledError or TimeoutError.
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"""
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d = defer.ensureDeferred(
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self.cl.get_json("testserv:8008", "foo/bar", timeout=10000)
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)
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self.pump()
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# Nothing happened yet
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self.assertNoResult(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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self.assertEqual(clients[0][0], "1.2.3.4")
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self.assertEqual(clients[0][1], 8008)
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# Deferred is still without a result
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self.assertNoResult(d)
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# Push by enough to time it out
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self.reactor.advance(10.5)
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f = self.failureResultOf(d)
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self.assertIsInstance(f.value, RequestSendFailed)
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self.assertIsInstance(
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f.value.inner_exception, (ConnectingCancelledError, TimeoutError)
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)
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def test_client_connect_no_response(self):
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"""
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If the HTTP request is connected, but gets no response before being
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timed out, it'll give a ResponseNeverReceived.
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"""
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d = defer.ensureDeferred(
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self.cl.get_json("testserv:8008", "foo/bar", timeout=10000)
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)
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self.pump()
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# Nothing happened yet
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self.assertNoResult(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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self.assertEqual(clients[0][0], "1.2.3.4")
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self.assertEqual(clients[0][1], 8008)
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conn = Mock()
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client = clients[0][2].buildProtocol(None)
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client.makeConnection(conn)
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# Deferred is still without a result
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self.assertNoResult(d)
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# Push by enough to time it out
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self.reactor.advance(10.5)
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f = self.failureResultOf(d)
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self.assertIsInstance(f.value, RequestSendFailed)
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self.assertIsInstance(f.value.inner_exception, ResponseNeverReceived)
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def test_client_ip_range_blacklist(self):
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"""Ensure that Synapse does not try to connect to blacklisted IPs"""
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# Set up the ip_range blacklist
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self.hs.config.federation_ip_range_blacklist = IPSet(
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["127.0.0.0/8", "fe80::/64"]
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)
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self.reactor.lookups["internal"] = "127.0.0.1"
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self.reactor.lookups["internalv6"] = "fe80:0:0:0:0:8a2e:370:7337"
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self.reactor.lookups["fine"] = "10.20.30.40"
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cl = MatrixFederationHttpClient(self.hs, None)
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# Try making a GET request to a blacklisted IPv4 address
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# ------------------------------------------------------
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# Make the request
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d = defer.ensureDeferred(cl.get_json("internal:8008", "foo/bar", timeout=10000))
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# Nothing happened yet
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self.assertNoResult(d)
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self.pump(1)
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# Check that it was unable to resolve the address
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 0)
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f = self.failureResultOf(d)
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self.assertIsInstance(f.value, RequestSendFailed)
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self.assertIsInstance(f.value.inner_exception, DNSLookupError)
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# Try making a POST request to a blacklisted IPv6 address
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# -------------------------------------------------------
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# Make the request
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d = defer.ensureDeferred(
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cl.post_json("internalv6:8008", "foo/bar", timeout=10000)
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)
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# Nothing has happened yet
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self.assertNoResult(d)
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# Move the reactor forwards
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self.pump(1)
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# Check that it was unable to resolve the address
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 0)
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# Check that it was due to a blacklisted DNS lookup
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f = self.failureResultOf(d, RequestSendFailed)
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self.assertIsInstance(f.value.inner_exception, DNSLookupError)
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# Try making a GET request to a non-blacklisted IPv4 address
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# ----------------------------------------------------------
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# Make the request
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d = defer.ensureDeferred(cl.post_json("fine:8008", "foo/bar", timeout=10000))
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# Nothing has happened yet
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self.assertNoResult(d)
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# Move the reactor forwards
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self.pump(1)
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# Check that it was able to resolve the address
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clients = self.reactor.tcpClients
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self.assertNotEqual(len(clients), 0)
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# Connection will still fail as this IP address does not resolve to anything
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f = self.failureResultOf(d, RequestSendFailed)
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self.assertIsInstance(f.value.inner_exception, ConnectingCancelledError)
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def test_client_gets_headers(self):
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"""
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Once the client gets the headers, _request returns successfully.
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"""
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request = MatrixFederationRequest(
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method="GET", destination="testserv:8008", path="foo/bar"
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)
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d = defer.ensureDeferred(self.cl._send_request(request, timeout=10000))
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self.pump()
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conn = Mock()
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clients = self.reactor.tcpClients
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client = clients[0][2].buildProtocol(None)
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client.makeConnection(conn)
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# Deferred does not have a result
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self.assertNoResult(d)
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# Send it the HTTP response
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client.dataReceived(b"HTTP/1.1 200 OK\r\nServer: Fake\r\n\r\n")
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# We should get a successful response
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r = self.successResultOf(d)
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self.assertEqual(r.code, 200)
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@parameterized.expand(["get_json", "post_json", "delete_json", "put_json"])
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def test_timeout_reading_body(self, method_name: str):
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"""
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If the HTTP request is connected, but gets no response before being
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timed out, it'll give a RequestSendFailed with can_retry.
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"""
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method = getattr(self.cl, method_name)
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d = defer.ensureDeferred(method("testserv:8008", "foo/bar", timeout=10000))
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self.pump()
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conn = Mock()
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clients = self.reactor.tcpClients
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client = clients[0][2].buildProtocol(None)
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client.makeConnection(conn)
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# Deferred does not have a result
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self.assertNoResult(d)
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# Send it the HTTP response
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client.dataReceived(
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(
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b"HTTP/1.1 200 OK\r\nContent-Type: application/json\r\n"
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b"Server: Fake\r\n\r\n"
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)
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)
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# Push by enough to time it out
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self.reactor.advance(10.5)
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f = self.failureResultOf(d)
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self.assertIsInstance(f.value, RequestSendFailed)
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self.assertTrue(f.value.can_retry)
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self.assertIsInstance(f.value.inner_exception, defer.TimeoutError)
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def test_client_requires_trailing_slashes(self):
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"""
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If a connection is made to a client but the client rejects it due to
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requiring a trailing slash. We need to retry the request with a
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trailing slash. Workaround for Synapse <= v0.99.3, explained in #3622.
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"""
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d = defer.ensureDeferred(
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self.cl.get_json("testserv:8008", "foo/bar", try_trailing_slash_on_400=True)
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)
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# Send the request
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self.pump()
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# there should have been a call to connectTCP
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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(_host, _port, factory, _timeout, _bindAddress) = clients[0]
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# complete the connection and wire it up to a fake transport
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client = factory.buildProtocol(None)
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conn = StringTransport()
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client.makeConnection(conn)
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# that should have made it send the request to the connection
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self.assertRegex(conn.value(), b"^GET /foo/bar")
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# Clear the original request data before sending a response
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conn.clear()
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# Send the HTTP response
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client.dataReceived(
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b"HTTP/1.1 400 Bad Request\r\n"
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b"Content-Type: application/json\r\n"
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b"Content-Length: 59\r\n"
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b"\r\n"
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b'{"errcode":"M_UNRECOGNIZED","error":"Unrecognized request"}'
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)
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# We should get another request with a trailing slash
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self.assertRegex(conn.value(), b"^GET /foo/bar/")
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# Send a happy response this time
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client.dataReceived(
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b"HTTP/1.1 200 OK\r\n"
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b"Content-Type: application/json\r\n"
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b"Content-Length: 2\r\n"
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b"\r\n"
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b"{}"
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)
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# We should get a successful response
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r = self.successResultOf(d)
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self.assertEqual(r, {})
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def test_client_does_not_retry_on_400_plus(self):
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"""
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Another test for trailing slashes but now test that we don't retry on
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trailing slashes on a non-400/M_UNRECOGNIZED response.
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See test_client_requires_trailing_slashes() for context.
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"""
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d = defer.ensureDeferred(
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self.cl.get_json("testserv:8008", "foo/bar", try_trailing_slash_on_400=True)
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)
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# Send the request
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self.pump()
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# there should have been a call to connectTCP
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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(_host, _port, factory, _timeout, _bindAddress) = clients[0]
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# complete the connection and wire it up to a fake transport
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client = factory.buildProtocol(None)
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conn = StringTransport()
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client.makeConnection(conn)
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# that should have made it send the request to the connection
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self.assertRegex(conn.value(), b"^GET /foo/bar")
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# Clear the original request data before sending a response
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conn.clear()
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# Send the HTTP response
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client.dataReceived(
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b"HTTP/1.1 404 Not Found\r\n"
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b"Content-Type: application/json\r\n"
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b"Content-Length: 2\r\n"
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b"\r\n"
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b"{}"
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)
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# We should not get another request
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self.assertEqual(conn.value(), b"")
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# We should get a 404 failure response
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self.failureResultOf(d)
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def test_client_sends_body(self):
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defer.ensureDeferred(
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self.cl.post_json(
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"testserv:8008", "foo/bar", timeout=10000, data={"a": "b"}
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)
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)
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self.pump()
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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client = clients[0][2].buildProtocol(None)
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server = HTTPChannel()
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client.makeConnection(FakeTransport(server, self.reactor))
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server.makeConnection(FakeTransport(client, self.reactor))
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self.pump(0.1)
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self.assertEqual(len(server.requests), 1)
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request = server.requests[0]
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content = request.content.read()
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self.assertEqual(content, b'{"a":"b"}')
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def test_closes_connection(self):
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"""Check that the client closes unused HTTP connections"""
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d = defer.ensureDeferred(self.cl.get_json("testserv:8008", "foo/bar"))
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self.pump()
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# there should have been a call to connectTCP
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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(_host, _port, factory, _timeout, _bindAddress) = clients[0]
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# complete the connection and wire it up to a fake transport
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client = factory.buildProtocol(None)
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conn = StringTransport()
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client.makeConnection(conn)
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# that should have made it send the request to the connection
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self.assertRegex(conn.value(), b"^GET /foo/bar")
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# Send the HTTP response
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client.dataReceived(
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b"HTTP/1.1 200 OK\r\n"
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b"Content-Type: application/json\r\n"
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b"Content-Length: 2\r\n"
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b"\r\n"
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|
b"{}"
|
|
)
|
|
|
|
# We should get a successful response
|
|
r = self.successResultOf(d)
|
|
self.assertEqual(r, {})
|
|
|
|
self.assertFalse(conn.disconnecting)
|
|
|
|
# wait for a while
|
|
self.reactor.advance(120)
|
|
|
|
self.assertTrue(conn.disconnecting)
|
|
|
|
@parameterized.expand([(b"",), (b"foo",), (b'{"a": Infinity}',)])
|
|
def test_json_error(self, return_value):
|
|
"""
|
|
Test what happens if invalid JSON is returned from the remote endpoint.
|
|
"""
|
|
|
|
test_d = defer.ensureDeferred(self.cl.get_json("testserv:8008", "foo/bar"))
|
|
|
|
self.pump()
|
|
|
|
# Nothing happened yet
|
|
self.assertNoResult(test_d)
|
|
|
|
# Make sure treq is trying to connect
|
|
clients = self.reactor.tcpClients
|
|
self.assertEqual(len(clients), 1)
|
|
(host, port, factory, _timeout, _bindAddress) = clients[0]
|
|
self.assertEqual(host, "1.2.3.4")
|
|
self.assertEqual(port, 8008)
|
|
|
|
# complete the connection and wire it up to a fake transport
|
|
protocol = factory.buildProtocol(None)
|
|
transport = StringTransport()
|
|
protocol.makeConnection(transport)
|
|
|
|
# that should have made it send the request to the transport
|
|
self.assertRegex(transport.value(), b"^GET /foo/bar")
|
|
self.assertRegex(transport.value(), b"Host: testserv:8008")
|
|
|
|
# Deferred is still without a result
|
|
self.assertNoResult(test_d)
|
|
|
|
# Send it the HTTP response
|
|
protocol.dataReceived(
|
|
b"HTTP/1.1 200 OK\r\n"
|
|
b"Server: Fake\r\n"
|
|
b"Content-Type: application/json\r\n"
|
|
b"Content-Length: %i\r\n"
|
|
b"\r\n"
|
|
b"%s" % (len(return_value), return_value)
|
|
)
|
|
|
|
self.pump()
|
|
|
|
f = self.failureResultOf(test_d)
|
|
self.assertIsInstance(f.value, ValueError)
|