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synapse/tests/federation/test_federation_client.py

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# Copyright 2022 Matrix.org Federation C.I.C
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from unittest import mock
import twisted.web.client
from twisted.internet import defer
from twisted.test.proto_helpers import MemoryReactor
from synapse.api.room_versions import RoomVersions
from synapse.events import EventBase
from synapse.rest import admin
from synapse.rest.client import login, room
from synapse.server import HomeServer
from synapse.util import Clock
from tests.test_utils import FakeResponse, event_injection
from tests.unittest import FederatingHomeserverTestCase
class FederationClientTest(FederatingHomeserverTestCase):
servlets = [
admin.register_servlets,
room.register_servlets,
login.register_servlets,
]
def prepare(
self, reactor: MemoryReactor, clock: Clock, homeserver: HomeServer
) -> None:
super().prepare(reactor, clock, homeserver)
# mock out the Agent used by the federation client, which is easier than
# catching the HTTPS connection and do the TLS stuff.
self._mock_agent = mock.create_autospec(twisted.web.client.Agent, spec_set=True)
homeserver.get_federation_http_client().agent = self._mock_agent
# Move clock up to somewhat realistic time so the PDU destination retry
# works (`now` needs to be larger than `0 + PDU_RETRY_TIME_MS`).
self.reactor.advance(1000000000)
self.creator = f"@creator:{self.OTHER_SERVER_NAME}"
self.test_room_id = "!room_id"
def test_get_room_state(self) -> None:
# mock up some events to use in the response.
# In real life, these would have things in `prev_events` and `auth_events`, but that's
# a bit annoying to mock up, and the code under test doesn't care, so we don't bother.
create_event_dict = self.add_hashes_and_signatures_from_other_server(
{
"room_id": self.test_room_id,
"type": "m.room.create",
"state_key": "",
"sender": self.creator,
"content": {"creator": self.creator},
"prev_events": [],
"auth_events": [],
"origin_server_ts": 500,
}
)
member_event_dict = self.add_hashes_and_signatures_from_other_server(
{
"room_id": self.test_room_id,
"type": "m.room.member",
"sender": self.creator,
"state_key": self.creator,
"content": {"membership": "join"},
"prev_events": [],
"auth_events": [],
"origin_server_ts": 600,
}
)
pl_event_dict = self.add_hashes_and_signatures_from_other_server(
{
"room_id": self.test_room_id,
"type": "m.room.power_levels",
"sender": self.creator,
"state_key": "",
"content": {},
"prev_events": [],
"auth_events": [],
"origin_server_ts": 700,
}
)
# mock up the response, and have the agent return it
self._mock_agent.request.side_effect = lambda *args, **kwargs: defer.succeed(
FakeResponse.json(
payload={
"pdus": [
create_event_dict,
member_event_dict,
pl_event_dict,
],
"auth_chain": [
create_event_dict,
member_event_dict,
],
}
)
)
# now fire off the request
state_resp, auth_resp = self.get_success(
self.hs.get_federation_client().get_room_state(
"yet.another.server",
self.test_room_id,
"event_id",
RoomVersions.V9,
)
)
# check the right call got made to the agent
self._mock_agent.request.assert_called_once_with(
b"GET",
b"matrix-federation://yet.another.server/_matrix/federation/v1/state/%21room_id?event_id=event_id",
headers=mock.ANY,
bodyProducer=None,
)
# ... and that the response is correct.
# the auth_resp should be empty because all the events are also in state
self.assertEqual(auth_resp, [])
# all of the events should be returned in state_resp, though not necessarily
# in the same order. We just check the type on the assumption that if the type
# is right, so is the rest of the event.
self.assertCountEqual(
[e.type for e in state_resp],
["m.room.create", "m.room.member", "m.room.power_levels"],
)
def test_get_pdu_returns_nothing_when_event_does_not_exist(self) -> None:
"""No event should be returned when the event does not exist"""
pulled_pdu_info = self.get_success(
self.hs.get_federation_client().get_pdu(
["yet.another.server"],
"event_should_not_exist",
RoomVersions.V9,
)
)
self.assertEqual(pulled_pdu_info, None)
def test_get_pdu(self) -> None:
"""Test to make sure an event is returned by `get_pdu()`"""
self._get_pdu_once()
def test_get_pdu_event_from_cache_is_pristine(self) -> None:
"""Test that modifications made to events returned by `get_pdu()`
do not propagate back to to the internal cache (events returned should
be a copy).
"""
# Get the PDU in the cache
remote_pdu = self._get_pdu_once()
# Modify the the event reference.
# This change should not make it back to the `_get_pdu_cache`.
remote_pdu.internal_metadata.outlier = True
# Get the event again. This time it should read it from cache.
pulled_pdu_info2 = self.get_success(
self.hs.get_federation_client().get_pdu(
["yet.another.server"],
remote_pdu.event_id,
RoomVersions.V9,
)
)
assert pulled_pdu_info2 is not None
remote_pdu2 = pulled_pdu_info2.pdu
# Sanity check that we are working against the same event
self.assertEqual(remote_pdu.event_id, remote_pdu2.event_id)
# Make sure the event does not include modification from earlier
self.assertIsNotNone(remote_pdu2)
self.assertEqual(remote_pdu2.internal_metadata.outlier, False)
def _get_pdu_once(self) -> EventBase:
"""Retrieve an event via `get_pdu()` and assert that an event was returned.
Also used to prime the cache for subsequent test logic.
"""
message_event_dict = self.add_hashes_and_signatures_from_other_server(
{
"room_id": self.test_room_id,
"type": "m.room.message",
"sender": self.creator,
"state_key": "",
"content": {},
"prev_events": [],
"auth_events": [],
"origin_server_ts": 700,
"depth": 10,
}
)
# mock up the response, and have the agent return it
self._mock_agent.request.side_effect = lambda *args, **kwargs: defer.succeed(
FakeResponse.json(
payload={
"origin": "yet.another.server",
"origin_server_ts": 900,
"pdus": [
message_event_dict,
],
}
)
)
pulled_pdu_info = self.get_success(
self.hs.get_federation_client().get_pdu(
["yet.another.server"],
"event_id",
RoomVersions.V9,
)
)
assert pulled_pdu_info is not None
remote_pdu = pulled_pdu_info.pdu
# check the right call got made to the agent
self._mock_agent.request.assert_called_once_with(
b"GET",
b"matrix-federation://yet.another.server/_matrix/federation/v1/event/event_id",
headers=mock.ANY,
bodyProducer=None,
)
self.assertIsNotNone(remote_pdu)
self.assertEqual(remote_pdu.internal_metadata.outlier, False)
return remote_pdu
def test_backfill_invalid_signature_records_failed_pull_attempts(
self,
) -> None:
"""
Test to make sure that events from /backfill with invalid signatures get
recorded as failed pull attempts.
"""
OTHER_USER = f"@user:{self.OTHER_SERVER_NAME}"
main_store = self.hs.get_datastores().main
# Create the room
user_id = self.register_user("kermit", "test")
tok = self.login("kermit", "test")
room_id = self.helper.create_room_as(room_creator=user_id, tok=tok)
# We purposely don't run `add_hashes_and_signatures_from_other_server`
# over this because we want the signature check to fail.
pulled_event, _ = self.get_success(
event_injection.create_event(
self.hs,
room_id=room_id,
sender=OTHER_USER,
type="test_event_type",
content={"body": "garply"},
)
)
# We expect an outbound request to /backfill, so stub that out
self._mock_agent.request.side_effect = lambda *args, **kwargs: defer.succeed(
FakeResponse.json(
payload={
"origin": "yet.another.server",
"origin_server_ts": 900,
# Mimic the other server returning our new `pulled_event`
"pdus": [pulled_event.get_pdu_json()],
}
)
)
self.get_success(
self.hs.get_federation_client().backfill(
# We use "yet.another.server" instead of
# `self.OTHER_SERVER_NAME` because we want to see the behavior
# from `_check_sigs_and_hash_and_fetch_one` where it tries to
# fetch the PDU again from the origin server if the signature
# fails. Just want to make sure that the failure is counted from
# both code paths.
dest="yet.another.server",
room_id=room_id,
limit=1,
extremities=[pulled_event.event_id],
),
)
# Make sure our failed pull attempt was recorded
backfill_num_attempts = self.get_success(
main_store.db_pool.simple_select_one_onecol(
table="event_failed_pull_attempts",
keyvalues={"event_id": pulled_event.event_id},
retcol="num_attempts",
)
)
# This is 2 because it failed once from `self.OTHER_SERVER_NAME` and the
# other from "yet.another.server"
self.assertEqual(backfill_num_attempts, 2)