380 lines
15 KiB
Python
380 lines
15 KiB
Python
# 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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from typing import Any, Dict
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from unittest.mock import Mock
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from twisted.test.proto_helpers import MemoryReactor
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from synapse.api.constants import EventTypes
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from synapse.rest import admin
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from synapse.rest.client import login, room
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from synapse.server import HomeServer
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from synapse.types import JsonDict, create_requester
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from synapse.util import Clock
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from synapse.visibility import filter_events_for_client
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from tests import unittest
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from tests.unittest import override_config
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one_hour_ms = 3600000
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one_day_ms = one_hour_ms * 24
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class RetentionTestCase(unittest.HomeserverTestCase):
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servlets = [
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admin.register_servlets,
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login.register_servlets,
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room.register_servlets,
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]
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def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
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config = self.default_config()
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# merge this default retention config with anything that was specified in
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# @override_config
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retention_config = {
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"enabled": True,
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"default_policy": {
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"min_lifetime": one_day_ms,
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"max_lifetime": one_day_ms * 3,
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},
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"allowed_lifetime_min": one_day_ms,
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"allowed_lifetime_max": one_day_ms * 3,
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}
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retention_config.update(config.get("retention", {}))
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config["retention"] = retention_config
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self.hs = self.setup_test_homeserver(config=config)
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return self.hs
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def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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self.user_id = self.register_user("user", "password")
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self.token = self.login("user", "password")
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self.store = self.hs.get_datastores().main
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self.serializer = self.hs.get_event_client_serializer()
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self.clock = self.hs.get_clock()
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def test_retention_event_purged_with_state_event(self) -> None:
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"""Tests that expired events are correctly purged when the room's retention policy
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is defined by a state event.
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"""
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room_id = self.helper.create_room_as(self.user_id, tok=self.token)
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# Set the room's retention period to 2 days.
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lifetime = one_day_ms * 2
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self.helper.send_state(
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room_id=room_id,
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event_type=EventTypes.Retention,
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body={"max_lifetime": lifetime},
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tok=self.token,
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)
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self._test_retention_event_purged(room_id, one_day_ms * 1.5)
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def test_retention_event_purged_with_state_event_outside_allowed(self) -> None:
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"""Tests that the server configuration can override the policy for a room when
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running the purge jobs.
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"""
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room_id = self.helper.create_room_as(self.user_id, tok=self.token)
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# Set a max_lifetime higher than the maximum allowed value.
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self.helper.send_state(
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room_id=room_id,
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event_type=EventTypes.Retention,
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body={"max_lifetime": one_day_ms * 4},
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tok=self.token,
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)
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# Check that the event is purged after waiting for the maximum allowed duration
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# instead of the one specified in the room's policy.
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self._test_retention_event_purged(room_id, one_day_ms * 1.5)
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# Set a max_lifetime lower than the minimum allowed value.
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self.helper.send_state(
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room_id=room_id,
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event_type=EventTypes.Retention,
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body={"max_lifetime": one_hour_ms},
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tok=self.token,
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)
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# Check that the event is purged after waiting for the minimum allowed duration
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# instead of the one specified in the room's policy.
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self._test_retention_event_purged(room_id, one_day_ms * 0.5)
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def test_retention_event_purged_without_state_event(self) -> None:
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"""Tests that expired events are correctly purged when the room's retention policy
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is defined by the server's configuration's default retention policy.
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"""
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room_id = self.helper.create_room_as(self.user_id, tok=self.token)
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self._test_retention_event_purged(room_id, one_day_ms * 2)
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@override_config({"retention": {"purge_jobs": [{"interval": "5d"}]}})
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def test_visibility(self) -> None:
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"""Tests that synapse.visibility.filter_events_for_client correctly filters out
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outdated events, even if the purge job hasn't got to them yet.
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We do this by setting a very long time between purge jobs.
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"""
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store = self.hs.get_datastores().main
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storage_controllers = self.hs.get_storage_controllers()
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room_id = self.helper.create_room_as(self.user_id, tok=self.token)
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# Send a first event, which should be filtered out at the end of the test.
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resp = self.helper.send(room_id=room_id, body="1", tok=self.token)
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first_event_id = resp.get("event_id")
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assert isinstance(first_event_id, str)
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# Advance the time by 2 days. We're using the default retention policy, therefore
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# after this the first event will still be valid.
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self.reactor.advance(one_day_ms * 2 / 1000)
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# Send another event, which shouldn't get filtered out.
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resp = self.helper.send(room_id=room_id, body="2", tok=self.token)
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valid_event_id = resp.get("event_id")
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assert isinstance(valid_event_id, str)
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# Advance the time by another 2 days. After this, the first event should be
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# outdated but not the second one.
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self.reactor.advance(one_day_ms * 2 / 1000)
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# Fetch the events, and run filter_events_for_client on them
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events = self.get_success(
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store.get_events_as_list([first_event_id, valid_event_id])
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)
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self.assertEqual(2, len(events), "events retrieved from database")
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filtered_events = self.get_success(
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filter_events_for_client(storage_controllers, self.user_id, events)
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)
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# We should only get one event back.
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self.assertEqual(len(filtered_events), 1, filtered_events)
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# That event should be the second, not outdated event.
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self.assertEqual(filtered_events[0].event_id, valid_event_id, filtered_events)
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def _test_retention_event_purged(self, room_id: str, increment: float) -> None:
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"""Run the following test scenario to test the message retention policy support:
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1. Send event 1
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2. Increment time by `increment`
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3. Send event 2
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4. Increment time by `increment`
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5. Check that event 1 has been purged
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6. Check that event 2 has not been purged
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7. Check that state events that were sent before event 1 aren't purged.
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The main reason for sending a second event is because currently Synapse won't
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purge the latest message in a room because it would otherwise result in a lack of
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forward extremities for this room. It's also a good thing to ensure the purge jobs
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aren't too greedy and purge messages they shouldn't.
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Args:
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room_id: The ID of the room to test retention in.
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increment: The number of milliseconds to advance the clock each time. Must be
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defined so that events in the room aren't purged if they are `increment`
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old but are purged if they are `increment * 2` old.
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"""
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# Get the create event to, later, check that we can still access it.
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message_handler = self.hs.get_message_handler()
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create_event = self.get_success(
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message_handler.get_room_data(
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create_requester(self.user_id), room_id, EventTypes.Create, state_key=""
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)
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)
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# Send a first event to the room. This is the event we'll want to be purged at the
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# end of the test.
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resp = self.helper.send(room_id=room_id, body="1", tok=self.token)
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expired_event_id = resp.get("event_id")
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assert expired_event_id is not None
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# Check that we can retrieve the event.
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expired_event = self.get_event(expired_event_id)
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self.assertEqual(
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expired_event.get("content", {}).get("body"), "1", expired_event
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)
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# Advance the time.
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self.reactor.advance(increment / 1000)
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# Send another event. We need this because the purge job won't purge the most
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# recent event in the room.
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resp = self.helper.send(room_id=room_id, body="2", tok=self.token)
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valid_event_id = resp.get("event_id")
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assert valid_event_id is not None
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# Advance the time again. Now our first event should have expired but our second
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# one should still be kept.
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self.reactor.advance(increment / 1000)
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# Check that the first event has been purged from the database, i.e. that we
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# can't retrieve it anymore, because it has expired.
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self.get_event(expired_event_id, expect_none=True)
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# Check that the event that hasn't expired can still be retrieved.
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valid_event = self.get_event(valid_event_id)
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self.assertEqual(valid_event.get("content", {}).get("body"), "2", valid_event)
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# Check that we can still access state events that were sent before the event that
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# has been purged.
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self.get_event(room_id, bool(create_event))
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def get_event(self, event_id: str, expect_none: bool = False) -> JsonDict:
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event = self.get_success(self.store.get_event(event_id, allow_none=True))
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if expect_none:
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self.assertIsNone(event)
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return {}
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assert event is not None
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time_now = self.clock.time_msec()
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serialized = self.serializer.serialize_event(event, time_now)
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return serialized
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class RetentionNoDefaultPolicyTestCase(unittest.HomeserverTestCase):
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servlets = [
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admin.register_servlets,
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login.register_servlets,
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room.register_servlets,
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]
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def default_config(self) -> Dict[str, Any]:
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config = super().default_config()
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retention_config = {
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"enabled": True,
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}
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# Update this config with what's in the default config so that
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# override_config works as expected.
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retention_config.update(config.get("retention", {}))
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config["retention"] = retention_config
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return config
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def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
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mock_federation_client = Mock(spec=["backfill"])
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self.hs = self.setup_test_homeserver(
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federation_client=mock_federation_client,
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)
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return self.hs
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def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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self.user_id = self.register_user("user", "password")
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self.token = self.login("user", "password")
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def test_no_default_policy(self) -> None:
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"""Tests that an event doesn't get expired if there is neither a default retention
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policy nor a policy specific to the room.
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"""
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room_id = self.helper.create_room_as(self.user_id, tok=self.token)
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self._test_retention(room_id)
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def test_state_policy(self) -> None:
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"""Tests that an event gets correctly expired if there is no default retention
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policy but there's a policy specific to the room.
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"""
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room_id = self.helper.create_room_as(self.user_id, tok=self.token)
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# Set the maximum lifetime to 35 days so that the first event gets expired but not
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# the second one.
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self.helper.send_state(
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room_id=room_id,
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event_type=EventTypes.Retention,
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body={"max_lifetime": one_day_ms * 35},
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tok=self.token,
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)
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self._test_retention(room_id, expected_code_for_first_event=404)
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@unittest.override_config({"retention": {"enabled": False}})
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def test_visibility_when_disabled(self) -> None:
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"""Retention policies should be ignored when the retention feature is disabled."""
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room_id = self.helper.create_room_as(self.user_id, tok=self.token)
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self.helper.send_state(
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room_id=room_id,
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event_type=EventTypes.Retention,
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body={"max_lifetime": one_day_ms},
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tok=self.token,
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)
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resp = self.helper.send(room_id=room_id, body="test", tok=self.token)
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self.reactor.advance(one_day_ms * 2 / 1000)
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self.get_event(room_id, resp["event_id"])
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def _test_retention(
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self, room_id: str, expected_code_for_first_event: int = 200
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) -> None:
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# Send a first event to the room. This is the event we'll want to be purged at the
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# end of the test.
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resp = self.helper.send(room_id=room_id, body="1", tok=self.token)
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first_event_id = resp.get("event_id")
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assert first_event_id is not None
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# Check that we can retrieve the event.
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expired_event = self.get_event(room_id, first_event_id)
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self.assertEqual(
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expired_event.get("content", {}).get("body"), "1", expired_event
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)
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# Advance the time by a month.
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self.reactor.advance(one_day_ms * 30 / 1000)
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# Send another event. We need this because the purge job won't purge the most
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# recent event in the room.
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resp = self.helper.send(room_id=room_id, body="2", tok=self.token)
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second_event_id = resp.get("event_id")
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assert second_event_id is not None
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# Advance the time by another month.
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self.reactor.advance(one_day_ms * 30 / 1000)
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# Check if the event has been purged from the database.
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first_event = self.get_event(
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room_id, first_event_id, expected_code=expected_code_for_first_event
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)
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if expected_code_for_first_event == 200:
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self.assertEqual(
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first_event.get("content", {}).get("body"), "1", first_event
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)
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# Check that the event that hasn't been purged can still be retrieved.
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second_event = self.get_event(room_id, second_event_id)
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self.assertEqual(second_event.get("content", {}).get("body"), "2", second_event)
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def get_event(
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self, room_id: str, event_id: str, expected_code: int = 200
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) -> JsonDict:
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url = "/_matrix/client/r0/rooms/%s/event/%s" % (room_id, event_id)
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channel = self.make_request("GET", url, access_token=self.token)
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self.assertEqual(channel.code, expected_code, channel.result)
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return channel.json_body
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