diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/handlers/directory.py | 34 | ||||
| -rw-r--r-- | synapse/handlers/room.py | 120 |
2 files changed, 140 insertions, 14 deletions
diff --git a/synapse/handlers/directory.py b/synapse/handlers/directory.py index 7d67bf803a..0699731c13 100644 --- a/synapse/handlers/directory.py +++ b/synapse/handlers/directory.py @@ -138,9 +138,30 @@ class DirectoryHandler(BaseHandler): ) @defer.inlineCallbacks - def delete_association(self, requester, room_alias): - # association deletion for human users + def delete_association(self, requester, room_alias, send_event=True): + """Remove an alias from the directory + (this is only meant for human users; AS users should call + delete_appservice_association) + + Args: + requester (Requester): + room_alias (RoomAlias): + send_event (bool): Whether to send an updated m.room.aliases event. + Note that, if we delete the canonical alias, we will always attempt + to send an m.room.canonical_alias event + + Returns: + Deferred[unicode]: room id that the alias used to point to + + Raises: + NotFoundError: if the alias doesn't exist + + AuthError: if the user doesn't have perms to delete the alias (ie, the user + is neither the creator of the alias, nor a server admin. + + SynapseError: if the alias belongs to an AS + """ user_id = requester.user.to_string() try: @@ -168,10 +189,11 @@ class DirectoryHandler(BaseHandler): room_id = yield self._delete_association(room_alias) try: - yield self.send_room_alias_update_event( - requester, - room_id - ) + if send_event: + yield self.send_room_alias_update_event( + requester, + room_id + ) yield self._update_canonical_alias( requester, diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py index fe960342b9..3928faa6e7 100644 --- a/synapse/handlers/room.py +++ b/synapse/handlers/room.py @@ -138,10 +138,15 @@ class RoomCreationHandler(BaseHandler): requester, tombstone_event, tombstone_context, ) - # and finally, shut down the PLs in the old room, and update them in the new - # room. old_room_state = yield tombstone_context.get_current_state_ids(self.store) + # update any aliases + yield self._move_aliases_to_new_room( + requester, old_room_id, new_room_id, old_room_state, + ) + + # and finally, shut down the PLs in the old room, and update them in the new + # room. yield self._update_upgraded_room_pls( requester, old_room_id, new_room_id, old_room_state, ) @@ -247,11 +252,6 @@ class RoomCreationHandler(BaseHandler): if not self.spam_checker.user_may_create_room(user_id): raise SynapseError(403, "You are not permitted to create rooms") - # XXX check alias is free - # canonical_alias = None - - # XXX create association in directory handler - creation_content = { "room_version": new_room_version, "predecessor": { @@ -297,7 +297,111 @@ class RoomCreationHandler(BaseHandler): # XXX invites/joins # XXX 3pid invites - # XXX directory_handler.send_room_alias_update_event + + @defer.inlineCallbacks + def _move_aliases_to_new_room( + self, requester, old_room_id, new_room_id, old_room_state, + ): + directory_handler = self.hs.get_handlers().directory_handler + + aliases = yield self.store.get_aliases_for_room(old_room_id) + + # check to see if we have a canonical alias. + canonical_alias = None + canonical_alias_event_id = old_room_state.get((EventTypes.CanonicalAlias, "")) + if canonical_alias_event_id: + canonical_alias_event = yield self.store.get_event(canonical_alias_event_id) + if canonical_alias_event: + canonical_alias = canonical_alias_event.content.get("alias", "") + + # first we try to remove the aliases from the old room (we suppress sending + # the room_aliases event until the end). + # + # Note that we'll only be able to remove aliases that (a) aren't owned by an AS, + # and (b) unless the user is a server admin, which the user created. + # + # This is probably correct - given we don't allow such aliases to be deleted + # normally, it would be odd to allow it in the case of doing a room upgrade - + # but it makes the upgrade less effective, and you have to wonder why a room + # admin can't remove aliases that point to that room anyway. + # (cf https://github.com/matrix-org/synapse/issues/2360) + # + removed_aliases = [] + for alias_str in aliases: + alias = RoomAlias.from_string(alias_str) + try: + yield directory_handler.delete_association( + requester, alias, send_event=False, + ) + removed_aliases.append(alias_str) + except SynapseError as e: + logger.warning( + "Unable to remove alias %s from old room: %s", + alias, e, + ) + + # if we didn't find any aliases, or couldn't remove anyway, we can skip the rest + # of this. + if not removed_aliases: + return + + try: + # this can fail if, for some reason, our user doesn't have perms to send + # m.room.aliases events in the old room (note that we've already checked that + # they have perms to send a tombstone event, so that's not terribly likely). + # + # If that happens, it's regrettable, but we should carry on: it's the same + # as when you remove an alias from the directory normally - it just means that + # the aliases event gets out of sync with the directory + # (cf https://github.com/vector-im/riot-web/issues/2369) + yield directory_handler.send_room_alias_update_event( + requester, old_room_id, + ) + except AuthError as e: + logger.warning( + "Failed to send updated alias event on old room: %s", e, + ) + + # we can now add any aliases we successfully removed to the new room. + for alias in removed_aliases: + try: + yield directory_handler.create_association( + requester, RoomAlias.from_string(alias), + new_room_id, servers=(self.hs.hostname, ), + send_event=False, + ) + logger.info("Moved alias %s to new room", alias) + except SynapseError as e: + # I'm not really expecting this to happen, but it could if the spam + # checking module decides it shouldn't, or similar. + logger.error( + "Error adding alias %s to new room: %s", + alias, e, + ) + + try: + if canonical_alias and (canonical_alias in removed_aliases): + yield self.event_creation_handler.create_and_send_nonmember_event( + requester, + { + "type": EventTypes.CanonicalAlias, + "state_key": "", + "room_id": new_room_id, + "sender": requester.user.to_string(), + "content": {"alias": canonical_alias, }, + }, + ratelimit=False + ) + + yield directory_handler.send_room_alias_update_event( + requester, new_room_id, + ) + except SynapseError as e: + # again I'm not really expecting this to fail, but if it does, I'd rather + # we returned the new room to the client at this point. + logger.error( + "Unable to send updated alias events in new room: %s", e, + ) @defer.inlineCallbacks def create_room(self, requester, config, ratelimit=True, |