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Make it possible to paginate forwards from stream tokens

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In order that we can fill the gap after a /sync, make it possible to paginate
forwards from a stream token.
This commit is contained in:
Richard van der Hoff 2016-01-27 17:42:45 +00:00
parent 8c97b49886
commit 5cba88ea7c
2 changed files with 35 additions and 24 deletions
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21
synapse/handlers/message.py
View File

@ -105,8 +105,6 @@ class MessageHandler(BaseHandler):
room_token = pagin_config.from_token.room_key room_token = pagin_config.from_token.room_key
room_token = RoomStreamToken.parse(room_token) room_token = RoomStreamToken.parse(room_token)
if room_token.topological is None:
raise SynapseError(400, "Invalid token")
pagin_config.from_token = pagin_config.from_token.copy_and_replace( pagin_config.from_token = pagin_config.from_token.copy_and_replace(
"room_key", str(room_token) "room_key", str(room_token)
@ -117,9 +115,18 @@ class MessageHandler(BaseHandler):
membership, member_event_id = yield self._check_in_room_or_world_readable( membership, member_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id room_id, user_id
) )
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 membership == Membership.LEAVE: if membership == Membership.LEAVE:
# If they have left the room then clamp the token to be before # If they have left the room then clamp the token to be before
# they left the room. # they left the room, to save the effort of loading from the
# database.
leave_token = yield self.store.get_topological_token_for_event( leave_token = yield self.store.get_topological_token_for_event(
member_event_id member_event_id
) )
@ -127,14 +134,6 @@ class MessageHandler(BaseHandler):
if leave_token.topological < room_token.topological: if leave_token.topological < room_token.topological:
source_config.from_key = str(leave_token) source_config.from_key = str(leave_token)
if source_config.direction == "f":
if source_config.to_key is None:
source_config.to_key = str(leave_token)
else:
to_token = RoomStreamToken.parse(source_config.to_key)
if leave_token.topological < to_token.topological:
source_config.to_key = str(leave_token)
yield self.hs.get_handlers().federation_handler.maybe_backfill( yield self.hs.get_handlers().federation_handler.maybe_backfill(
room_id, room_token.topological room_id, room_token.topological
) )

16
tests/rest/client/v1/test_rooms.py
View File

@ -1045,8 +1045,20 @@ class RoomMessageListTestCase(RestTestCase):
self.assertTrue("end" in response) self.assertTrue("end" in response)
@defer.inlineCallbacks @defer.inlineCallbacks
def test_stream_token_is_rejected(self): def test_stream_token_is_rejected_for_back_pagination(self):
(code, response) = yield self.mock_resource.trigger_get( (code, response) = yield self.mock_resource.trigger_get(
"/rooms/%s/messages?access_token=x&from=s0_0_0_0" % "/rooms/%s/messages?access_token=x&from=s0_0_0_0_0&dir=b" %
self.room_id) self.room_id)
self.assertEquals(400, code) self.assertEquals(400, code)
@defer.inlineCallbacks
def test_stream_token_is_accepted_for_fwd_pagianation(self):
token = "s0_0_0_0_0"
(code, response) = yield self.mock_resource.trigger_get(
"/rooms/%s/messages?access_token=x&from=%s" %
(self.room_id, token))
self.assertEquals(200, code)
self.assertTrue("start" in response)
self.assertEquals(token, response['start'])
self.assertTrue("chunk" in response)
self.assertTrue("end" in response)