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Update client-visibility filtering for outlier events (#12155)

Avoid trying to get the state for outliers, which isn't a sensible thing to do.
This commit is contained in:
Richard van der Hoff 2022-03-04 10:31:19 +00:00 committed by GitHub
parent d56202b038
commit 87c230c27c
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3 changed files with 90 additions and 4 deletions

1
changelog.d/12155.misc Normal file
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@ -0,0 +1 @@
Avoid trying to calculate the state at outlier events.

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@ -81,8 +81,9 @@ async def filter_events_for_client(
types = ((EventTypes.RoomHistoryVisibility, ""), (EventTypes.Member, user_id))
# we exclude outliers at this point, and then handle them separately later
event_id_to_state = await storage.state.get_state_for_events(
frozenset(e.event_id for e in events),
frozenset(e.event_id for e in events if not e.internal_metadata.outlier),
state_filter=StateFilter.from_types(types),
)
@ -154,6 +155,17 @@ async def filter_events_for_client(
if event.event_id in always_include_ids:
return event
# we need to handle outliers separately, since we don't have the room state.
if event.internal_metadata.outlier:
# Normally these can't be seen by clients, but we make an exception for
# for out-of-band membership events (eg, incoming invites, or rejections of
# said invite) for the user themselves.
if event.type == EventTypes.Member and event.state_key == user_id:
logger.debug("Returning out-of-band-membership event %s", event)
return event
return None
state = event_id_to_state[event.event_id]
# get the room_visibility at the time of the event.
@ -198,6 +210,9 @@ async def filter_events_for_client(
# Always allow the user to see their own leave events, otherwise
# they won't see the room disappear if they reject the invite
#
# (Note this doesn't work for out-of-band invite rejections, which don't
# have prev_state populated. They are handled above in the outlier code.)
if membership == "leave" and (
prev_membership == "join" or prev_membership == "invite"
):

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@ -13,11 +13,12 @@
# limitations under the License.
import logging
from typing import Optional
from unittest.mock import patch
from synapse.api.room_versions import RoomVersions
from synapse.events import EventBase
from synapse.types import JsonDict
from synapse.visibility import filter_events_for_server
from synapse.events import EventBase, make_event_from_dict
from synapse.types import JsonDict, create_requester
from synapse.visibility import filter_events_for_client, filter_events_for_server
from tests import unittest
from tests.utils import create_room
@ -185,3 +186,72 @@ class FilterEventsForServerTestCase(unittest.HomeserverTestCase):
self.get_success(self.storage.persistence.persist_event(event, context))
return event
class FilterEventsForClientTestCase(unittest.FederatingHomeserverTestCase):
def test_out_of_band_invite_rejection(self):
# this is where we have received an invite event over federation, and then
# rejected it.
invite_pdu = {
"room_id": "!room:id",
"depth": 1,
"auth_events": [],
"prev_events": [],
"origin_server_ts": 1,
"sender": "@someone:" + self.OTHER_SERVER_NAME,
"type": "m.room.member",
"state_key": "@user:test",
"content": {"membership": "invite"},
}
self.add_hashes_and_signatures(invite_pdu)
invite_event_id = make_event_from_dict(invite_pdu, RoomVersions.V9).event_id
self.get_success(
self.hs.get_federation_server().on_invite_request(
self.OTHER_SERVER_NAME,
invite_pdu,
"9",
)
)
# stub out do_remotely_reject_invite so that we fall back to a locally-
# generated rejection
with patch.object(
self.hs.get_federation_handler(),
"do_remotely_reject_invite",
side_effect=Exception(),
):
reject_event_id, _ = self.get_success(
self.hs.get_room_member_handler().remote_reject_invite(
invite_event_id,
txn_id=None,
requester=create_requester("@user:test"),
content={},
)
)
invite_event, reject_event = self.get_success(
self.hs.get_datastores().main.get_events_as_list(
[invite_event_id, reject_event_id]
)
)
# the invited user should be able to see both the invite and the rejection
self.assertEqual(
self.get_success(
filter_events_for_client(
self.hs.get_storage(), "@user:test", [invite_event, reject_event]
)
),
[invite_event, reject_event],
)
# other users should see neither
self.assertEqual(
self.get_success(
filter_events_for_client(
self.hs.get_storage(), "@other:test", [invite_event, reject_event]
)
),
[],
)