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Add fast path to _filter_events_for_server
Most rooms have a trivial history visibility like "shared" or "world_readable", especially large rooms, so lets not bother getting the full membership of those rooms in that case.
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@ -460,11 +460,44 @@ 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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# 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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(EventTypes.Member, None),
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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 = event_to_state_ids.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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events = 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 events
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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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(EventTypes.RoomHistoryVisibility, ""),
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(EventTypes.Member, None)
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)
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)
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