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Merge pull request #3443 from matrix-org/erikj/fast_filter_servers
Add fast path to _filter_events_for_server
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commit
1b947d6dde
@ -460,6 +460,47 @@ class FederationHandler(BaseHandler):
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@measure_func("_filter_events_for_server")
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@defer.inlineCallbacks
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def _filter_events_for_server(self, server_name, room_id, events):
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"""Filter the given events for the given server, redacting those the
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server can't see.
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Assumes the server is currently in the room.
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Returns
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list[FrozenEvent]
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"""
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# First lets check to see if all the events have a history visibility
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# of "shared" or "world_readable". If thats the case then we don't
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# need to check membership (as we know the server is in the room).
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event_to_state_ids = yield self.store.get_state_ids_for_events(
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frozenset(e.event_id for e in events),
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types=(
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(EventTypes.RoomHistoryVisibility, ""),
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)
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)
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visibility_ids = set()
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for sids in event_to_state_ids.itervalues():
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hist = sids.get((EventTypes.RoomHistoryVisibility, ""))
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if hist:
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visibility_ids.add(hist)
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# If we failed to find any history visibility events then the default
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# is "shared" visiblity.
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if not visibility_ids:
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defer.returnValue(events)
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event_map = yield self.store.get_events(visibility_ids)
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all_open = all(
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e.content.get("history_visibility") in (None, "shared", "world_readable")
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for e in event_map.itervalues()
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)
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if all_open:
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defer.returnValue(events)
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# Ok, so we're dealing with events that have non-trivial visibility
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# rules, so we need to also get the memberships of the room.
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event_to_state_ids = yield self.store.get_state_ids_for_events(
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frozenset(e.event_id for e in events),
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types=(
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