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forked-synapse/tests/http/test_matrixfederationclient.py
Till 573c6d7e69
Use max_upload_size as the limit when following the Location header (#17543) 
Otherwise we use the `expected_size` from the initial federation
request, which might be far too low.

### Pull Request Checklist

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---------

Co-authored-by: Erik Johnston <erikj@element.io>
2024-08-29 09:25:10 +02:00

1022 lines
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#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
import io
from typing import Any, Dict, Generator
from unittest.mock import ANY, Mock, create_autospec
from netaddr import IPSet
from parameterized import parameterized
from twisted.internet import defer
from twisted.internet.defer import Deferred, TimeoutError
from twisted.internet.error import ConnectingCancelledError, DNSLookupError
from twisted.test.proto_helpers import MemoryReactor, StringTransport
from twisted.web.client import Agent, ResponseNeverReceived
from twisted.web.http import HTTPChannel
from twisted.web.http_headers import Headers
from synapse.api.errors import HttpResponseException, RequestSendFailed
from synapse.api.ratelimiting import Ratelimiter
from synapse.config._base import ConfigError
from synapse.config.ratelimiting import RatelimitSettings
from synapse.http.matrixfederationclient import (
ByteParser,
MatrixFederationHttpClient,
MatrixFederationRequest,
)
from synapse.logging.context import (
SENTINEL_CONTEXT,
LoggingContext,
LoggingContextOrSentinel,
current_context,
)
from synapse.server import HomeServer
from synapse.util import Clock
from tests.replication._base import BaseMultiWorkerStreamTestCase
from tests.server import FakeTransport
from tests.test_utils import FakeResponse
from tests.unittest import HomeserverTestCase, override_config
def check_logcontext(context: LoggingContextOrSentinel) -> None:
current = current_context()
if current is not context:
raise AssertionError("Expected logcontext %s but was %s" % (context, current))
class FederationClientTests(HomeserverTestCase):
def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
hs = self.setup_test_homeserver(reactor=reactor, clock=clock)
return hs
def prepare(
self, reactor: MemoryReactor, clock: Clock, homeserver: HomeServer
) -> None:
self.cl = MatrixFederationHttpClient(self.hs, None)
self.reactor.lookups["testserv"] = "1.2.3.4"
def test_client_get(self) -> None:
"""
happy-path test of a GET request
"""
@defer.inlineCallbacks
def do_request() -> Generator["Deferred[Any]", object, object]:
with LoggingContext("one") as context:
fetch_d = defer.ensureDeferred(
self.cl.get_json("testserv:8008", "foo/bar")
)
# Nothing happened yet
self.assertNoResult(fetch_d)
# should have reset logcontext to the sentinel
check_logcontext(SENTINEL_CONTEXT)
try:
fetch_res = yield fetch_d
return fetch_res
finally:
check_logcontext(context)
test_d = do_request()
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
res_json = b'{ "a": 1 }'
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(res_json), res_json)
)
self.pump()
res = self.successResultOf(test_d)
# check the response is as expected
self.assertEqual(res, {"a": 1})
def test_dns_error(self) -> None:
"""
If the DNS lookup returns an error, it will bubble up.
"""
d = defer.ensureDeferred(
self.cl.get_json("testserv2:8008", "foo/bar", timeout=10000)
)
self.pump()
f = self.failureResultOf(d)
self.assertIsInstance(f.value, RequestSendFailed)
self.assertIsInstance(f.value.inner_exception, DNSLookupError)
def test_client_connection_refused(self) -> None:
d = defer.ensureDeferred(
self.cl.get_json("testserv:8008", "foo/bar", timeout=10000)
)
self.pump()
# Nothing happened yet
self.assertNoResult(d)
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)
e = Exception("go away")
factory.clientConnectionFailed(None, e)
self.pump(0.5)
f = self.failureResultOf(d)
self.assertIsInstance(f.value, RequestSendFailed)
self.assertIs(f.value.inner_exception, e)
def test_client_never_connect(self) -> None:
"""
If the HTTP request is not connected and is timed out, it'll give a
ConnectingCancelledError or TimeoutError.
"""
d = defer.ensureDeferred(
self.cl.get_json("testserv:8008", "foo/bar", timeout=10000)
)
self.pump()
# Nothing happened yet
self.assertNoResult(d)
# Make sure treq is trying to connect
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 1)
self.assertEqual(clients[0][0], "1.2.3.4")
self.assertEqual(clients[0][1], 8008)
# Deferred is still without a result
self.assertNoResult(d)
# Push by enough to time it out
self.reactor.advance(10.5)
f = self.failureResultOf(d)
self.assertIsInstance(f.value, RequestSendFailed)
self.assertIsInstance(
f.value.inner_exception, (ConnectingCancelledError, TimeoutError)
)
def test_client_connect_no_response(self) -> None:
"""
If the HTTP request is connected, but gets no response before being
timed out, it'll give a ResponseNeverReceived.
"""
d = defer.ensureDeferred(
self.cl.get_json("testserv:8008", "foo/bar", timeout=10000)
)
self.pump()
# Nothing happened yet
self.assertNoResult(d)
# Make sure treq is trying to connect
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 1)
self.assertEqual(clients[0][0], "1.2.3.4")
self.assertEqual(clients[0][1], 8008)
conn = Mock()
client = clients[0][2].buildProtocol(None)
client.makeConnection(conn)
# Deferred is still without a result
self.assertNoResult(d)
# Push by enough to time it out
self.reactor.advance(10.5)
f = self.failureResultOf(d)
self.assertIsInstance(f.value, RequestSendFailed)
self.assertIsInstance(f.value.inner_exception, ResponseNeverReceived)
def test_client_ip_range_blocklist(self) -> None:
"""Ensure that Synapse does not try to connect to blocked IPs"""
# Set up the ip_range blocklist
self.hs.config.server.federation_ip_range_blocklist = IPSet(
["127.0.0.0/8", "fe80::/64"]
)
self.reactor.lookups["internal"] = "127.0.0.1"
self.reactor.lookups["internalv6"] = "fe80:0:0:0:0:8a2e:370:7337"
self.reactor.lookups["fine"] = "10.20.30.40"
cl = MatrixFederationHttpClient(self.hs, None)
# Try making a GET request to a blocked IPv4 address
# ------------------------------------------------------
# Make the request
d = defer.ensureDeferred(cl.get_json("internal:8008", "foo/bar", timeout=10000))
# Nothing happened yet
self.assertNoResult(d)
self.pump(1)
# Check that it was unable to resolve the address
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 0)
f = self.failureResultOf(d)
self.assertIsInstance(f.value, RequestSendFailed)
self.assertIsInstance(f.value.inner_exception, DNSLookupError)
# Try making a POST request to a blocked IPv6 address
# -------------------------------------------------------
# Make the request
d = defer.ensureDeferred(
cl.post_json("internalv6:8008", "foo/bar", timeout=10000)
)
# Nothing has happened yet
self.assertNoResult(d)
# Move the reactor forwards
self.pump(1)
# Check that it was unable to resolve the address
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 0)
# Check that it was due to a blocked DNS lookup
f = self.failureResultOf(d, RequestSendFailed)
self.assertIsInstance(f.value.inner_exception, DNSLookupError)
# Try making a GET request to an allowed IPv4 address
# ----------------------------------------------------------
# Make the request
d = defer.ensureDeferred(cl.post_json("fine:8008", "foo/bar", timeout=10000))
# Nothing has happened yet
self.assertNoResult(d)
# Move the reactor forwards
self.pump(1)
# Check that it was able to resolve the address
clients = self.reactor.tcpClients
self.assertNotEqual(len(clients), 0)
# Connection will still fail as this IP address does not resolve to anything
f = self.failureResultOf(d, RequestSendFailed)
self.assertIsInstance(f.value.inner_exception, ConnectingCancelledError)
def test_client_gets_headers(self) -> None:
"""
Once the client gets the headers, _request returns successfully.
"""
request = MatrixFederationRequest(
method="GET", destination="testserv:8008", path="foo/bar"
)
d = defer.ensureDeferred(self.cl._send_request(request, timeout=10000))
self.pump()
conn = Mock()
clients = self.reactor.tcpClients
client = clients[0][2].buildProtocol(None)
client.makeConnection(conn)
# Deferred does not have a result
self.assertNoResult(d)
# Send it the HTTP response
client.dataReceived(b"HTTP/1.1 200 OK\r\nServer: Fake\r\n\r\n")
# We should get a successful response
r = self.successResultOf(d)
self.assertEqual(r.code, 200)
def test_authed_media_redirect_response(self) -> None:
"""
Validate that, when following a `Location` redirect, the
maximum size is _not_ set to the initial response `Content-Length` and
the media file can be downloaded.
"""
limiter = Ratelimiter(
store=self.hs.get_datastores().main,
clock=self.clock,
cfg=RatelimitSettings(key="", per_second=0.17, burst_count=1048576),
)
output_stream = io.BytesIO()
d = defer.ensureDeferred(
self.cl.federation_get_file(
"testserv:8008", "path", output_stream, limiter, "127.0.0.1", 10000
)
)
self.pump()
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)
# Deferred does not have a result
self.assertNoResult(d)
redirect_data = b"\r\n\r\n--6067d4698f8d40a0a794ea7d7379d53a\r\nContent-Type: application/json\r\n\r\n{}\r\n--6067d4698f8d40a0a794ea7d7379d53a\r\nLocation: http://testserv:8008/ab/c1/2345.txt\r\n\r\n--6067d4698f8d40a0a794ea7d7379d53a--\r\n\r\n"
protocol.dataReceived(
b"HTTP/1.1 200 OK\r\n"
b"Server: Fake\r\n"
b"Content-Length: %i\r\n"
b"Content-Type: multipart/mixed; boundary=6067d4698f8d40a0a794ea7d7379d53a\r\n\r\n"
% (len(redirect_data))
)
protocol.dataReceived(redirect_data)
# Still no result, not followed the redirect yet
self.assertNoResult(d)
# Now send the response returned by the server at `Location`
clients = self.reactor.tcpClients
(host, port, factory, _timeout, _bindAddress) = clients[1]
self.assertEqual(host, "1.2.3.4")
self.assertEqual(port, 8008)
protocol = factory.buildProtocol(None)
transport = StringTransport()
protocol.makeConnection(transport)
# make sure the length is longer than the initial response
data = b"Hello world!" * 30
protocol.dataReceived(
b"HTTP/1.1 200 OK\r\n"
b"Server: Fake\r\n"
b"Content-Length: %i\r\n"
b"Content-Type: text/plain\r\n"
b"\r\n"
b"%s\r\n"
b"\r\n" % (len(data), data)
)
# We should get a successful response
length, _, _ = self.successResultOf(d)
self.assertEqual(length, len(data))
self.assertEqual(output_stream.getvalue(), data)
@parameterized.expand(["get_json", "post_json", "delete_json", "put_json"])
def test_timeout_reading_body(self, method_name: str) -> None:
"""
If the HTTP request is connected, but gets no response before being
timed out, it'll give a RequestSendFailed with can_retry.
"""
method = getattr(self.cl, method_name)
d = defer.ensureDeferred(method("testserv:8008", "foo/bar", timeout=10000))
self.pump()
conn = Mock()
clients = self.reactor.tcpClients
client = clients[0][2].buildProtocol(None)
client.makeConnection(conn)
# Deferred does not have a result
self.assertNoResult(d)
# Send it the HTTP response
client.dataReceived(
b"HTTP/1.1 200 OK\r\nContent-Type: application/json\r\n"
b"Server: Fake\r\n\r\n"
)
# Push by enough to time it out
self.reactor.advance(10.5)
f = self.failureResultOf(d)
self.assertIsInstance(f.value, RequestSendFailed)
self.assertTrue(f.value.can_retry)
self.assertIsInstance(f.value.inner_exception, defer.TimeoutError)
def test_client_requires_trailing_slashes(self) -> None:
"""
If a connection is made to a client but the client rejects it due to
requiring a trailing slash. We need to retry the request with a
trailing slash. Workaround for Synapse <= v0.99.3, explained in
https://github.com/matrix-org/synapse/issues/3622.
"""
d = defer.ensureDeferred(
self.cl.get_json("testserv:8008", "foo/bar", try_trailing_slash_on_400=True)
)
# Send the request
self.pump()
# there should have been a call to connectTCP
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 1)
(_host, _port, factory, _timeout, _bindAddress) = clients[0]
# complete the connection and wire it up to a fake transport
client = factory.buildProtocol(None)
conn = StringTransport()
client.makeConnection(conn)
# that should have made it send the request to the connection
self.assertRegex(conn.value(), b"^GET /foo/bar")
# Clear the original request data before sending a response
conn.clear()
# Send the HTTP response
client.dataReceived(
b"HTTP/1.1 400 Bad Request\r\n"
b"Content-Type: application/json\r\n"
b"Content-Length: 59\r\n"
b"\r\n"
b'{"errcode":"M_UNRECOGNIZED","error":"Unrecognized request"}'
)
# We should get another request with a trailing slash
self.assertRegex(conn.value(), b"^GET /foo/bar/")
# Send a happy response this time
client.dataReceived(
b"HTTP/1.1 200 OK\r\n"
b"Content-Type: application/json\r\n"
b"Content-Length: 2\r\n"
b"\r\n"
b"{}"
)
# We should get a successful response
r = self.successResultOf(d)
self.assertEqual(r, {})
def test_client_does_not_retry_on_400_plus(self) -> None:
"""
Another test for trailing slashes but now test that we don't retry on
trailing slashes on a non-400/M_UNRECOGNIZED response.
See test_client_requires_trailing_slashes() for context.
"""
d = defer.ensureDeferred(
self.cl.get_json("testserv:8008", "foo/bar", try_trailing_slash_on_400=True)
)
# Send the request
self.pump()
# there should have been a call to connectTCP
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 1)
(_host, _port, factory, _timeout, _bindAddress) = clients[0]
# complete the connection and wire it up to a fake transport
client = factory.buildProtocol(None)
conn = StringTransport()
client.makeConnection(conn)
# that should have made it send the request to the connection
self.assertRegex(conn.value(), b"^GET /foo/bar")
# Clear the original request data before sending a response
conn.clear()
# Send the HTTP response
client.dataReceived(
b"HTTP/1.1 404 Not Found\r\n"
b"Content-Type: application/json\r\n"
b"Content-Length: 2\r\n"
b"\r\n"
b"{}"
)
# We should not get another request
self.assertEqual(conn.value(), b"")
# We should get a 404 failure response
self.failureResultOf(d)
def test_client_sends_body(self) -> None:
defer.ensureDeferred(
self.cl.post_json(
"testserv:8008", "foo/bar", timeout=10000, data={"a": "b"}
)
)
self.pump()
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 1)
client = clients[0][2].buildProtocol(None)
server = HTTPChannel()
client.makeConnection(FakeTransport(server, self.reactor))
server.makeConnection(FakeTransport(client, self.reactor))
self.pump(0.1)
self.assertEqual(len(server.requests), 1)
request = server.requests[0]
content = request.content.read()
self.assertEqual(content, b'{"a":"b"}')
def test_closes_connection(self) -> None:
"""Check that the client closes unused HTTP connections"""
d = defer.ensureDeferred(self.cl.get_json("testserv:8008", "foo/bar"))
self.pump()
# there should have been a call to connectTCP
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 1)
(_host, _port, factory, _timeout, _bindAddress) = clients[0]
# complete the connection and wire it up to a fake transport
client = factory.buildProtocol(None)
conn = StringTransport()
client.makeConnection(conn)
# that should have made it send the request to the connection
self.assertRegex(conn.value(), b"^GET /foo/bar")
# Send the HTTP response
client.dataReceived(
b"HTTP/1.1 200 OK\r\n"
b"Content-Type: application/json\r\n"
b"Content-Length: 2\r\n"
b"\r\n"
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: bytes) -> None:
"""
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, RequestSendFailed)
def test_too_big(self) -> None:
"""
Test what happens if a huge response 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 a huge 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"\r\n"
)
self.pump()
# should still be waiting
self.assertNoResult(test_d)
sent = 0
chunk_size = 1024 * 512
while not test_d.called:
protocol.dataReceived(b"a" * chunk_size)
sent += chunk_size
self.assertLessEqual(sent, ByteParser.MAX_RESPONSE_SIZE)
self.assertEqual(sent, ByteParser.MAX_RESPONSE_SIZE)
f = self.failureResultOf(test_d)
self.assertIsInstance(f.value, RequestSendFailed)
self.assertTrue(transport.disconnecting)
def test_build_auth_headers_rejects_falsey_destinations(self) -> None:
with self.assertRaises(ValueError):
self.cl.build_auth_headers(None, b"GET", b"https://example.com")
with self.assertRaises(ValueError):
self.cl.build_auth_headers(b"", b"GET", b"https://example.com")
with self.assertRaises(ValueError):
self.cl.build_auth_headers(
None, b"GET", b"https://example.com", destination_is=b""
)
with self.assertRaises(ValueError):
self.cl.build_auth_headers(
b"", b"GET", b"https://example.com", destination_is=b""
)
@override_config(
{
"federation": {
"client_timeout": "180s",
"max_long_retry_delay": "100s",
"max_short_retry_delay": "7s",
"max_long_retries": 20,
"max_short_retries": 5,
}
}
)
def test_configurable_retry_and_delay_values(self) -> None:
self.assertEqual(self.cl.default_timeout_seconds, 180)
self.assertEqual(self.cl.max_long_retry_delay_seconds, 100)
self.assertEqual(self.cl.max_short_retry_delay_seconds, 7)
self.assertEqual(self.cl.max_long_retries, 20)
self.assertEqual(self.cl.max_short_retries, 5)
class FederationClientProxyTests(BaseMultiWorkerStreamTestCase):
def default_config(self) -> Dict[str, Any]:
conf = super().default_config()
conf["instance_map"] = {
"main": {"host": "testserv", "port": 8765},
"federation_sender": {"host": "testserv", "port": 1001},
}
return conf
@override_config(
{
"outbound_federation_restricted_to": ["federation_sender"],
"worker_replication_secret": "secret",
}
)
def test_proxy_requests_through_federation_sender_worker(self) -> None:
"""
Test that all outbound federation requests go through the `federation_sender`
worker
"""
# Mock out the `MatrixFederationHttpClient` of the `federation_sender` instance
# so we can act like some remote server responding to requests
mock_client_on_federation_sender = Mock()
mock_agent_on_federation_sender = create_autospec(Agent, spec_set=True)
mock_client_on_federation_sender.agent = mock_agent_on_federation_sender
# Create the `federation_sender` worker
self.make_worker_hs(
"synapse.app.generic_worker",
{"worker_name": "federation_sender"},
federation_http_client=mock_client_on_federation_sender,
)
# Fake `remoteserv:8008` responding to requests
mock_agent_on_federation_sender.request.side_effect = (
lambda *args, **kwargs: defer.succeed(
FakeResponse.json(
payload={
"foo": "bar",
}
)
)
)
# This federation request from the main process should be proxied through the
# `federation_sender` worker off to the remote server
test_request_from_main_process_d = defer.ensureDeferred(
self.hs.get_federation_http_client().get_json("remoteserv:8008", "foo/bar")
)
# Pump the reactor so our deferred goes through the motions
self.pump()
# Make sure that the request was proxied through the `federation_sender` worker
mock_agent_on_federation_sender.request.assert_called_once_with(
b"GET",
b"matrix-federation://remoteserv:8008/foo/bar",
headers=ANY,
bodyProducer=ANY,
)
# Make sure the response is as expected back on the main worker
res = self.successResultOf(test_request_from_main_process_d)
self.assertEqual(res, {"foo": "bar"})
@override_config(
{
"outbound_federation_restricted_to": ["federation_sender"],
"worker_replication_secret": "secret",
}
)
def test_proxy_request_with_network_error_through_federation_sender_worker(
self,
) -> None:
"""
Test that when the outbound federation request fails with a network related
error, a sensible error makes its way back to the main process.
"""
# Mock out the `MatrixFederationHttpClient` of the `federation_sender` instance
# so we can act like some remote server responding to requests
mock_client_on_federation_sender = Mock()
mock_agent_on_federation_sender = create_autospec(Agent, spec_set=True)
mock_client_on_federation_sender.agent = mock_agent_on_federation_sender
# Create the `federation_sender` worker
self.make_worker_hs(
"synapse.app.generic_worker",
{"worker_name": "federation_sender"},
federation_http_client=mock_client_on_federation_sender,
)
# Fake `remoteserv:8008` responding to requests
mock_agent_on_federation_sender.request.side_effect = (
lambda *args, **kwargs: defer.fail(ResponseNeverReceived("fake error"))
)
# This federation request from the main process should be proxied through the
# `federation_sender` worker off to the remote server
test_request_from_main_process_d = defer.ensureDeferred(
self.hs.get_federation_http_client().get_json("remoteserv:8008", "foo/bar")
)
# Pump the reactor so our deferred goes through the motions. We pump with 10
# seconds (0.1 * 100) so the `MatrixFederationHttpClient` runs out of retries
# and finally passes along the error response.
self.pump(0.1)
# Make sure that the request was proxied through the `federation_sender` worker
mock_agent_on_federation_sender.request.assert_called_with(
b"GET",
b"matrix-federation://remoteserv:8008/foo/bar",
headers=ANY,
bodyProducer=ANY,
)
# Make sure we get some sort of error back on the main worker
failure_res = self.failureResultOf(test_request_from_main_process_d)
self.assertIsInstance(failure_res.value, RequestSendFailed)
self.assertIsInstance(failure_res.value.inner_exception, HttpResponseException)
self.assertEqual(failure_res.value.inner_exception.code, 502)
@override_config(
{
"outbound_federation_restricted_to": ["federation_sender"],
"worker_replication_secret": "secret",
}
)
def test_proxy_requests_and_discards_hop_by_hop_headers(self) -> None:
"""
Test to make sure hop-by-hop headers and addional headers defined in the
`Connection` header are discarded when proxying requests
"""
# Mock out the `MatrixFederationHttpClient` of the `federation_sender` instance
# so we can act like some remote server responding to requests
mock_client_on_federation_sender = Mock()
mock_agent_on_federation_sender = create_autospec(Agent, spec_set=True)
mock_client_on_federation_sender.agent = mock_agent_on_federation_sender
# Create the `federation_sender` worker
self.make_worker_hs(
"synapse.app.generic_worker",
{"worker_name": "federation_sender"},
federation_http_client=mock_client_on_federation_sender,
)
# Fake `remoteserv:8008` responding to requests
mock_agent_on_federation_sender.request.side_effect = lambda *args, **kwargs: defer.succeed(
FakeResponse(
code=200,
body=b'{"foo": "bar"}',
headers=Headers(
{
"Content-Type": ["application/json"],
"Connection": ["close, X-Foo, X-Bar"],
# Should be removed because it's defined in the `Connection` header
"X-Foo": ["foo"],
"X-Bar": ["bar"],
# Should be removed because it's a hop-by-hop header
"Proxy-Authorization": "abcdef",
}
),
)
)
# This federation request from the main process should be proxied through the
# `federation_sender` worker off to the remote server
test_request_from_main_process_d = defer.ensureDeferred(
self.hs.get_federation_http_client().get_json_with_headers(
"remoteserv:8008", "foo/bar"
)
)
# Pump the reactor so our deferred goes through the motions
self.pump()
# Make sure that the request was proxied through the `federation_sender` worker
mock_agent_on_federation_sender.request.assert_called_once_with(
b"GET",
b"matrix-federation://remoteserv:8008/foo/bar",
headers=ANY,
bodyProducer=ANY,
)
res, headers = self.successResultOf(test_request_from_main_process_d)
header_names = set(headers.keys())
# Make sure the response does not include the hop-by-hop headers
self.assertNotIn(b"X-Foo", header_names)
self.assertNotIn(b"X-Bar", header_names)
self.assertNotIn(b"Proxy-Authorization", header_names)
# Make sure the response is as expected back on the main worker
self.assertEqual(res, {"foo": "bar"})
@override_config(
{
"outbound_federation_restricted_to": ["federation_sender"],
# `worker_replication_secret` is set here so that the test setup is able to pass
# but the actual homserver creation test is in the test body below
"worker_replication_secret": "secret",
}
)
def test_not_able_to_proxy_requests_through_federation_sender_worker_when_no_secret_configured(
self,
) -> None:
"""
Test that we aren't able to proxy any outbound federation requests when
`worker_replication_secret` is not configured.
"""
with self.assertRaises(ConfigError):
# Create the `federation_sender` worker
self.make_worker_hs(
"synapse.app.generic_worker",
{
"worker_name": "federation_sender",
# Test that we aren't able to proxy any outbound federation requests
# when `worker_replication_secret` is not configured.
"worker_replication_secret": None,
},
)
@override_config(
{
"outbound_federation_restricted_to": ["federation_sender"],
"worker_replication_secret": "secret",
}
)
def test_not_able_to_proxy_requests_through_federation_sender_worker_when_wrong_auth_given(
self,
) -> None:
"""
Test that we aren't able to proxy any outbound federation requests when the
wrong authorization is given.
"""
# Mock out the `MatrixFederationHttpClient` of the `federation_sender` instance
# so we can act like some remote server responding to requests
mock_client_on_federation_sender = Mock()
mock_agent_on_federation_sender = create_autospec(Agent, spec_set=True)
mock_client_on_federation_sender.agent = mock_agent_on_federation_sender
# Create the `federation_sender` worker
self.make_worker_hs(
"synapse.app.generic_worker",
{
"worker_name": "federation_sender",
# Test that we aren't able to proxy any outbound federation requests
# when `worker_replication_secret` is wrong.
"worker_replication_secret": "wrong",
},
federation_http_client=mock_client_on_federation_sender,
)
# This federation request from the main process should be proxied through the
# `federation_sender` worker off but will fail here because it's using the wrong
# authorization.
test_request_from_main_process_d = defer.ensureDeferred(
self.hs.get_federation_http_client().get_json("remoteserv:8008", "foo/bar")
)
# Pump the reactor so our deferred goes through the motions. We pump with 10
# seconds (0.1 * 100) so the `MatrixFederationHttpClient` runs out of retries
# and finally passes along the error response.
self.pump(0.1)
# Make sure that the request was *NOT* proxied through the `federation_sender`
# worker
mock_agent_on_federation_sender.request.assert_not_called()
failure_res = self.failureResultOf(test_request_from_main_process_d)
self.assertIsInstance(failure_res.value, HttpResponseException)
self.assertEqual(failure_res.value.code, 401)
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