forked from MirrorHub/synapse
Merge pull request #6553 from matrix-org/babolivier/fix-context-filter
Use the filtered version of an event when responding to /context requests for that event
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commit
6316530366
4 changed files with 135 additions and 3 deletions
1
changelog.d/6553.bugfix
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1
changelog.d/6553.bugfix
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Fix a bug causing responses to the `/context` client endpoint to not use the pruned version of the event.
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@ -907,7 +907,10 @@ class RoomContextHandler(object):
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results["events_before"] = yield filter_evts(results["events_before"])
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results["events_after"] = yield filter_evts(results["events_after"])
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results["event"] = event
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# filter_evts can return a pruned event in case the user is allowed to see that
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# there's something there but not see the content, so use the event that's in
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# `filtered` rather than the event we retrieved from the datastore.
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results["event"] = filtered[0]
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if results["events_after"]:
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last_event_id = results["events_after"][-1].event_id
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@ -938,7 +941,7 @@ class RoomContextHandler(object):
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if event_filter:
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state_events = event_filter.filter(state_events)
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results["state"] = state_events
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results["state"] = yield filter_evts(state_events)
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# We use a dummy token here as we only care about the room portion of
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# the token, which we replace.
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@ -52,7 +52,8 @@ def filter_events_for_client(
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apply_retention_policies=True,
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):
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"""
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Check which events a user is allowed to see
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Check which events a user is allowed to see. If the user can see the event but its
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sender asked for their data to be erased, prune the content of the event.
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Args:
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storage
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@ -29,6 +29,7 @@ import synapse.rest.admin
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from synapse.api.constants import EventContentFields, EventTypes, Membership
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from synapse.handlers.pagination import PurgeStatus
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from synapse.rest.client.v1 import login, profile, room
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from synapse.rest.client.v2_alpha import account
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from synapse.util.stringutils import random_string
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from tests import unittest
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@ -1597,3 +1598,129 @@ class LabelsTestCase(unittest.HomeserverTestCase):
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)
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return event_id
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class ContextTestCase(unittest.HomeserverTestCase):
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servlets = [
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synapse.rest.admin.register_servlets_for_client_rest_resource,
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room.register_servlets,
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login.register_servlets,
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account.register_servlets,
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]
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def prepare(self, reactor, clock, homeserver):
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self.user_id = self.register_user("user", "password")
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self.tok = self.login("user", "password")
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self.room_id = self.helper.create_room_as(self.user_id, tok=self.tok)
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self.other_user_id = self.register_user("user2", "password")
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self.other_tok = self.login("user2", "password")
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self.helper.invite(self.room_id, self.user_id, self.other_user_id, tok=self.tok)
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self.helper.join(self.room_id, self.other_user_id, tok=self.other_tok)
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def test_erased_sender(self):
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"""Test that an erasure request results in the requester's events being hidden
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from any new member of the room.
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"""
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# Send a bunch of events in the room.
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self.helper.send(self.room_id, "message 1", tok=self.tok)
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self.helper.send(self.room_id, "message 2", tok=self.tok)
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event_id = self.helper.send(self.room_id, "message 3", tok=self.tok)["event_id"]
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self.helper.send(self.room_id, "message 4", tok=self.tok)
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self.helper.send(self.room_id, "message 5", tok=self.tok)
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# Check that we can still see the messages before the erasure request.
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request, channel = self.make_request(
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"GET",
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'/rooms/%s/context/%s?filter={"types":["m.room.message"]}'
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% (self.room_id, event_id),
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access_token=self.tok,
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)
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self.render(request)
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self.assertEqual(channel.code, 200, channel.result)
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events_before = channel.json_body["events_before"]
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self.assertEqual(len(events_before), 2, events_before)
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self.assertEqual(
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events_before[0].get("content", {}).get("body"),
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"message 2",
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events_before[0],
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)
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self.assertEqual(
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events_before[1].get("content", {}).get("body"),
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"message 1",
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events_before[1],
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)
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self.assertEqual(
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channel.json_body["event"].get("content", {}).get("body"),
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"message 3",
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channel.json_body["event"],
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)
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events_after = channel.json_body["events_after"]
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self.assertEqual(len(events_after), 2, events_after)
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self.assertEqual(
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events_after[0].get("content", {}).get("body"),
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"message 4",
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events_after[0],
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)
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self.assertEqual(
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events_after[1].get("content", {}).get("body"),
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"message 5",
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events_after[1],
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)
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# Deactivate the first account and erase the user's data.
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deactivate_account_handler = self.hs.get_deactivate_account_handler()
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self.get_success(
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deactivate_account_handler.deactivate_account(self.user_id, erase_data=True)
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)
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# Invite another user in the room. This is needed because messages will be
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# pruned only if the user wasn't a member of the room when the messages were
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# sent.
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invited_user_id = self.register_user("user3", "password")
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invited_tok = self.login("user3", "password")
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self.helper.invite(
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self.room_id, self.other_user_id, invited_user_id, tok=self.other_tok
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)
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self.helper.join(self.room_id, invited_user_id, tok=invited_tok)
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# Check that a user that joined the room after the erasure request can't see
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# the messages anymore.
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request, channel = self.make_request(
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"GET",
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'/rooms/%s/context/%s?filter={"types":["m.room.message"]}'
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% (self.room_id, event_id),
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access_token=invited_tok,
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)
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self.render(request)
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self.assertEqual(channel.code, 200, channel.result)
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events_before = channel.json_body["events_before"]
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self.assertEqual(len(events_before), 2, events_before)
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self.assertDictEqual(events_before[0].get("content"), {}, events_before[0])
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self.assertDictEqual(events_before[1].get("content"), {}, events_before[1])
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self.assertDictEqual(
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channel.json_body["event"].get("content"), {}, channel.json_body["event"]
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)
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events_after = channel.json_body["events_after"]
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self.assertEqual(len(events_after), 2, events_after)
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self.assertDictEqual(events_after[0].get("content"), {}, events_after[0])
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self.assertEqual(events_after[1].get("content"), {}, events_after[1])
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