From 487f1bb49d5eb5840c7dd70d95ac53f2b24eba21 Mon Sep 17 00:00:00 2001 From: Brendan Abolivier Date: Mon, 16 Dec 2019 12:14:12 +0000 Subject: [PATCH] Use the filtered version of an event when responding to /context requests for that event Sometimes the filtering function can return a pruned version of an event (on top of either the event itself or an empty list), if it thinks the user should be able to see that there's an event there but not the content of that event. Therefore, the previous logic of 'if filtered is empty then we can use the event we retrieved from the database' is flawed, and we should use the event returned by the filtering function. --- synapse/handlers/room.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py index 22768e97f..7f979e581 100644 --- a/synapse/handlers/room.py +++ b/synapse/handlers/room.py @@ -907,7 +907,10 @@ class RoomContextHandler(object): results["events_before"] = yield filter_evts(results["events_before"]) results["events_after"] = yield filter_evts(results["events_after"]) - results["event"] = event + # filter_evts can return a pruned event in case the user is allowed to see that + # there's something there but not see the content, so use the event that's in + # `filtered` rather than the event we retrieved from the datastore. + results["event"] = filtered[0] if results["events_after"]: last_event_id = results["events_after"][-1].event_id