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Merge pull request #615 from matrix-org/rav/SYN-642

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Handle rejections of invites from local users locally
This commit is contained in:
Richard van der Hoff 2016-03-04 00:12:19 +00:00
commit fa6d6bbceb
2 changed files with 42 additions and 8 deletions
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25
synapse/handlers/_base.py
View file

@ -199,8 +199,7 @@ class BaseHandler(object):
# events in the room, because we don't know enough about the graph
# fragment we received to treat it like a graph, so the above returned
# no relevant events. It may have returned some events (if we have
# joined and left the room), but not useful ones, like the invite. So we
# forcibly set our context to the invite we received over federation.
# joined and left the room), but not useful ones, like the invite.
if (
not self.is_host_in_room(context.current_state) and
builder.type == EventTypes.Member
@ -208,7 +207,27 @@ class BaseHandler(object):
prev_member_event = yield self.store.get_room_member(
builder.sender, builder.room_id
)
if prev_member_event:
# The prev_member_event may already be in context.current_state,
# despite us not being present in the room; in particular, if
# inviting user, and all other local users, have already left.
#
# In that case, we have all the information we need, and we don't
# want to drop "context" - not least because we may need to handle
# the invite locally, which will require us to have the whole
# context (not just prev_member_event) to auth it.
#
context_event_ids = (
e.event_id for e in context.current_state.values()
)
if (
prev_member_event and
prev_member_event.event_id not in context_event_ids
):
# The prev_member_event is missing from context, so it must
# have arrived over federation and is an outlier. We forcibly
# set our context to the invite we received over federation
builder.prev_events = (
prev_member_event.event_id,
prev_member_event.prev_events

23
synapse/handlers/room.py
View file

@ -500,6 +500,8 @@ class RoomMemberHandler(BaseHandler):
Raises:
SynapseError if there was a problem changing the membership.
"""
remote_room_hosts = remote_room_hosts or []
target_user = UserID.from_string(event.state_key)
room_id = event.room_id
@ -534,7 +536,23 @@ class RoomMemberHandler(BaseHandler):
action = "remote_join"
elif event.membership == Membership.LEAVE:
is_host_in_room = self.is_host_in_room(context.current_state)
if not is_host_in_room:
# perhaps we've been invited
inviter = self.get_inviter(target_user.to_string(), context.current_state)
if not inviter:
raise SynapseError(404, "Not a known room")
if self.hs.is_mine(inviter):
# the inviter was on our server, but has now left. Carry on
# with the normal rejection codepath.
#
# This is a bit of a hack, because the room might still be
# active on other servers.
pass
else:
# send the rejection to the inviter's HS.
remote_room_hosts = remote_room_hosts + [inviter.domain]
action = "remote_reject"
federation_handler = self.hs.get_handlers().federation_handler
@ -554,11 +572,8 @@ class RoomMemberHandler(BaseHandler):
event.content,
)
elif action == "remote_reject":
inviter = self.get_inviter(target_user.to_string(), context.current_state)
if not inviter:
raise SynapseError(404, "No known servers")
yield federation_handler.do_remotely_reject_invite(
[inviter.domain],
remote_room_hosts,
room_id,
event.user_id
)