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Merge pull request #2490 from matrix-org/erikj/drop_left_room_events
Ignore incoming events for rooms that we have left
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commit
84e27a592d
@ -122,6 +122,28 @@ class FederationHandler(BaseHandler):
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self.room_queues[pdu.room_id].append((pdu, origin))
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return
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# If we're no longer in the room just ditch the event entirely. This
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# is probably an old server that has come back and thinks we're still
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# in the room (or we've been rejoined to the room by a state reset).
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#
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# If we were never in the room then maybe our database got vaped and
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# we should check if we *are* in fact in the room. If we are then we
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# can magically rejoin the room.
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is_in_room = yield self.auth.check_host_in_room(
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pdu.room_id,
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self.server_name
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)
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if not is_in_room:
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was_in_room = yield self.store.was_host_joined(
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pdu.room_id, self.server_name,
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)
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if was_in_room:
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logger.info(
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"Ignoring PDU %s for room %s from %s as we've left the room!",
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pdu.event_id, pdu.room_id, origin,
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)
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return
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state = None
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auth_chain = []
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@ -784,6 +784,9 @@ class EventsStore(SQLBaseStore):
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self._invalidate_cache_and_stream(
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txn, self.is_host_joined, (room_id, host)
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)
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self._invalidate_cache_and_stream(
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txn, self.was_host_joined, (room_id, host)
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)
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self._invalidate_cache_and_stream(
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txn, self.get_users_in_room, (room_id,)
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@ -533,6 +533,46 @@ class RoomMemberStore(SQLBaseStore):
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defer.returnValue(True)
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@cachedInlineCallbacks()
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def was_host_joined(self, room_id, host):
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"""Check whether the server is or ever was in the room.
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Args:
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room_id (str)
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host (str)
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Returns:
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Deferred: Resolves to True if the host is/was in the room, otherwise
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False.
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"""
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if '%' in host or '_' in host:
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raise Exception("Invalid host name")
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sql = """
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SELECT user_id FROM room_memberships
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WHERE room_id = ?
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AND user_id LIKE ?
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AND membership = 'join'
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LIMIT 1
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"""
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# We do need to be careful to ensure that host doesn't have any wild cards
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# in it, but we checked above for known ones and we'll check below that
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# the returned user actually has the correct domain.
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like_clause = "%:" + host
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rows = yield self._execute("was_host_joined", None, sql, room_id, like_clause)
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if not rows:
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defer.returnValue(False)
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user_id = rows[0][0]
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if get_domain_from_id(user_id) != host:
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# This can only happen if the host name has something funky in it
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raise Exception("Invalid host name")
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defer.returnValue(True)
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def get_joined_hosts(self, room_id, state_entry):
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state_group = state_entry.state_group
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if not state_group:
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