diff options
Diffstat (limited to 'synapse/handlers/federation.py')
| -rw-r--r-- | synapse/handlers/federation.py | 78 |
1 files changed, 56 insertions, 22 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 38bebbf598..45d955e6f5 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -18,7 +18,6 @@ import itertools import logging -import sys import six from six import iteritems, itervalues @@ -106,7 +105,7 @@ class FederationHandler(BaseHandler): self.hs = hs - self.store = hs.get_datastore() + self.store = hs.get_datastore() # type: synapse.storage.DataStore self.federation_client = hs.get_federation_client() self.state_handler = hs.get_state_handler() self.server_name = hs.hostname @@ -323,14 +322,22 @@ class FederationHandler(BaseHandler): affected=pdu.event_id, ) - # Calculate the state of the previous events, and - # de-conflict them to find the current state. - state_groups = [] + # Calculate the state after each of the previous events, and + # resolve them to find the correct state at the current event. auth_chains = set() + event_map = { + event_id: pdu, + } try: # Get the state of the events we know about - ours = yield self.store.get_state_groups(room_id, list(seen)) - state_groups.append(ours) + ours = yield self.store.get_state_groups_ids(room_id, seen) + + # state_maps is a list of mappings from (type, state_key) to event_id + # type: list[dict[tuple[str, str], str]] + state_maps = list(ours.values()) + + # we don't need this any more, let's delete it. + del ours # Ask the remote server for the states we don't # know about @@ -350,28 +357,54 @@ class FederationHandler(BaseHandler): ) ) + # we want the state *after* p; get_state_for_room returns the + # state *before* p. + remote_event = yield self.federation_client.get_pdu( + [origin], p, outlier=True, + ) + + if remote_event is None: + raise Exception( + "Unable to get missing prev_event %s" % (p, ) + ) + + if remote_event.is_state(): + remote_state.append(remote_event) + # XXX hrm I'm not convinced that duplicate events will compare # for equality, so I'm not sure this does what the author # hoped. auth_chains.update(got_auth_chain) - state_group = { + remote_state_map = { (x.type, x.state_key): x.event_id for x in remote_state } - state_groups.append(state_group) + state_maps.append(remote_state_map) + + for x in remote_state: + event_map[x.event_id] = x # Resolve any conflicting state + @defer.inlineCallbacks def fetch(ev_ids): - return self.store.get_events( - ev_ids, get_prev_content=False, check_redacted=False + fetched = yield self.store.get_events( + ev_ids, get_prev_content=False, check_redacted=False, ) + # add any events we fetch here to the `event_map` so that we + # can use them to build the state event list below. + event_map.update(fetched) + defer.returnValue(fetched) room_version = yield self.store.get_room_version(room_id) state_map = yield resolve_events_with_factory( - room_version, state_groups, {event_id: pdu}, fetch + room_version, state_maps, event_map, fetch, ) - state = (yield self.store.get_events(state_map.values())).values() + # we need to give _process_received_pdu the actual state events + # rather than event ids, so generate that now. + state = [ + event_map[e] for e in six.itervalues(state_map) + ] auth_chain = list(auth_chains) except Exception: logger.warn( @@ -1568,6 +1601,9 @@ class FederationHandler(BaseHandler): auth_events=auth_events, ) + # reraise does not allow inlineCallbacks to preserve the stacktrace, so we + # hack around with a try/finally instead. + success = False try: if not event.internal_metadata.is_outlier() and not backfilled: yield self.action_generator.handle_push_actions_for_event( @@ -1578,15 +1614,13 @@ class FederationHandler(BaseHandler): [(event, context)], backfilled=backfilled, ) - except: # noqa: E722, as we reraise the exception this is fine. - tp, value, tb = sys.exc_info() - - logcontext.run_in_background( - self.store.remove_push_actions_from_staging, - event.event_id, - ) - - six.reraise(tp, value, tb) + success = True + finally: + if not success: + logcontext.run_in_background( + self.store.remove_push_actions_from_staging, + event.event_id, + ) defer.returnValue(context) |