Matrix-Mirrors/synapse-product
1
0
Fork 0
mirror of https://git.anonymousland.org/anonymousland/synapse-product.git synced 2025-05-02 14:06:03 -04:00
Code Issues Projects Releases Packages Wiki Activity

Allow paginating backwards from stream token

Browse source
This commit is contained in:
Erik Johnston 2016-01-28 11:52:34 +00:00
parent ba8931829b
commit 4e7948b47a
3 changed files with 24 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

15
synapse/handlers/message.py
View file

@ -16,7 +16,7 @@
from twisted.internet import defer
from synapse.api.constants import EventTypes, Membership
from synapse.api.errors import SynapseError, AuthError, Codes
from synapse.api.errors import AuthError, Codes
from synapse.streams.config import PaginationConfig
from synapse.events.utils import serialize_event
from synapse.events.validator import EventValidator
@ -119,9 +119,12 @@ class MessageHandler(BaseHandler):
if source_config.direction == 'b':
# if we're going backwards, we might need to backfill. This
# requires that we have a topo token.
if room_token.topological is None:
raise SynapseError(400, "Invalid token: cannot paginate "
"backwards from a stream token")
if room_token.topological:
max_topo = room_token.topological
else:
max_topo = yield self.store.get_max_topological_token_for_stream_and_room(
room_id, room_token.stream
)
if membership == Membership.LEAVE:
# If they have left the room then clamp the token to be before
@ -131,11 +134,11 @@ class MessageHandler(BaseHandler):
member_event_id
)
leave_token = RoomStreamToken.parse(leave_token)
if leave_token.topological < room_token.topological:
if leave_token.topological < max_topo:
source_config.from_key = str(leave_token)
yield self.hs.get_handlers().federation_handler.maybe_backfill(
room_id, room_token.topological
room_id, max_topo
)
events, next_key = yield data_source.get_pagination_rows(