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This commit is contained in:
Richard van der Hoff 2018-04-17 23:41:36 +01:00
parent e585228860
commit 1f4b498b73
2 changed files with 35 additions and 5 deletions
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15
synapse/handlers/federation.py
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@ -542,9 +542,16 @@ class FederationHandler(BaseHandler):
def backfill(self, dest, room_id, limit, extremities):
""" Trigger a backfill request to `dest` for the given `room_id`
This will attempt to get more events from the remote. This may return
be successfull and still return no events if the other side has no new
events to offer.
This will attempt to get more events from the remote. If the other side
has no new events to offer, this will return an empty list.
As the events are received, we check their signatures, and also do some
sanity-checking on them. If any of the backfilled events are invalid,
this method throws a SynapseError.
TODO: make this more useful to distinguish failures of the remote
server from invalid events (there is probably no point in trying to
re-fetch invalid events from every other HS in the room.)
"""
if dest == self.server_name:
raise SynapseError(400, "Can't backfill from self.")
@ -556,6 +563,8 @@ class FederationHandler(BaseHandler):
extremities=extremities,
)
# do some sanity-checking of the received events, before we go and
# do state resolution across 1000 events.
for ev in events:
self._sanity_check_event(ev)