Implement fallback for V2 invite API

If the room version is either 1 or 2 then a server should retry failed
`/v2/invite` requests with the v1 API
This commit is contained in:
Erik Johnston 2019-01-28 14:55:53 +00:00
parent 57a3e96e8e
commit d414f30019
2 changed files with 89 additions and 14 deletions

View file

@ -751,18 +751,9 @@ class FederationClient(FederationBase):
@defer.inlineCallbacks
def send_invite(self, destination, room_id, event_id, pdu):
time_now = self._clock.time_msec()
try:
code, content = yield self.transport_layer.send_invite(
destination=destination,
room_id=room_id,
event_id=event_id,
content=pdu.get_pdu_json(time_now),
)
except HttpResponseException as e:
if e.code == 403:
raise e.to_synapse_error()
raise
room_version = yield self.store.get_room_version(room_id)
content = yield self._do_send_invite(destination, pdu, room_version)
pdu_dict = content["event"]
@ -780,6 +771,55 @@ class FederationClient(FederationBase):
defer.returnValue(pdu)
@defer.inlineCallbacks
def _do_send_invite(self, destination, pdu, room_version):
"""Actually sends the invite, first trying v2 API and falling back to
v1 API if necessary.
Args:
destination (str): Target server
pdu (FrozenEvent)
room_version (str)
Returns:
dict: The event as a dict as returned by the remote server
"""
time_now = self._clock.time_msec()
try:
content = yield self.transport_layer.send_invite_v2(
destination=destination,
room_id=pdu.room_id,
event_id=pdu.event_id,
content={
"event": pdu.get_pdu_json(time_now),
"room_version": room_version,
"invite_room_state": pdu.unsigned.get("invite_room_state", []),
},
)
defer.returnValue(content)
except HttpResponseException as e:
if e.code in [400, 404]:
if room_version in (RoomVersions.V1, RoomVersions.V2):
pass # We'll fall through
else:
raise Exception("Remote server is too old")
elif e.code == 403:
raise e.to_synapse_error()
else:
raise
# Didn't work, try v1 API.
# Note the v1 API returns a tuple of `(200, content)`
_, content = yield self.transport_layer.send_invite_v1(
destination=destination,
room_id=pdu.room_id,
event_id=pdu.event_id,
content=pdu.get_pdu_json(time_now),
)
defer.returnValue(content)
def send_leave(self, destinations, pdu):
"""Sends a leave event to one of a list of homeservers.

View file

@ -21,7 +21,7 @@ from six.moves import urllib
from twisted.internet import defer
from synapse.api.constants import Membership
from synapse.api.urls import FEDERATION_V1_PREFIX
from synapse.api.urls import FEDERATION_V1_PREFIX, FEDERATION_V2_PREFIX
from synapse.util.logutils import log_function
logger = logging.getLogger(__name__)
@ -289,7 +289,7 @@ class TransportLayerClient(object):
@defer.inlineCallbacks
@log_function
def send_invite(self, destination, room_id, event_id, content):
def send_invite_v1(self, destination, room_id, event_id, content):
path = _create_v1_path("/invite/%s/%s", room_id, event_id)
response = yield self.client.put_json(
@ -301,6 +301,20 @@ class TransportLayerClient(object):
defer.returnValue(response)
@defer.inlineCallbacks
@log_function
def send_invite_v2(self, destination, room_id, event_id, content):
path = _create_v2_path("/invite/%s/%s", room_id, event_id)
response = yield self.client.put_json(
destination=destination,
path=path,
data=content,
ignore_backoff=True,
)
defer.returnValue(response)
@defer.inlineCallbacks
@log_function
def get_public_rooms(self, remote_server, limit, since_token,
@ -958,3 +972,24 @@ def _create_v1_path(path, *args):
FEDERATION_V1_PREFIX
+ path % tuple(urllib.parse.quote(arg, "") for arg in args)
)
def _create_v2_path(path, *args):
"""Creates a path against V2 federation API from the path template and
args. Ensures that all args are url encoded.
Example:
_create_v2_path("/event/%s/", event_id)
Args:
path (str): String template for the path
args: ([str]): Args to insert into path. Each arg will be url encoded
Returns:
str
"""
return (
FEDERATION_V2_PREFIX
+ path % tuple(urllib.parse.quote(arg, "") for arg in args)
)