mirror of
https://mau.dev/maunium/synapse.git
synced 2024-10-01 01:36:05 -04:00
158 lines
4.7 KiB
Python
158 lines
4.7 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2014 matrix.org
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
|
|
from twisted.internet import defer
|
|
|
|
from .pdu_codec import PduCodec
|
|
|
|
from synapse.api.errors import AuthError
|
|
from synapse.util.logutils import log_function
|
|
|
|
import logging
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class FederationEventHandler(object):
|
|
""" Responsible for:
|
|
a) handling received Pdus before handing them on as Events to the rest
|
|
of the home server (including auth and state conflict resoultion)
|
|
b) converting events that were produced by local clients that may need
|
|
to be sent to remote home servers.
|
|
"""
|
|
|
|
def __init__(self, hs):
|
|
self.store = hs.get_datastore()
|
|
self.replication_layer = hs.get_replication_layer()
|
|
self.state_handler = hs.get_state_handler()
|
|
# self.auth_handler = gs.get_auth_handler()
|
|
self.event_handler = hs.get_handlers().federation_handler
|
|
self.server_name = hs.hostname
|
|
|
|
self.lock_manager = hs.get_room_lock_manager()
|
|
|
|
self.replication_layer.set_handler(self)
|
|
|
|
self.pdu_codec = PduCodec(hs)
|
|
|
|
@log_function
|
|
@defer.inlineCallbacks
|
|
def handle_new_event(self, event):
|
|
""" Takes in an event from the client to server side, that has already
|
|
been authed and handled by the state module, and sends it to any
|
|
remote home servers that may be interested.
|
|
|
|
Args:
|
|
event
|
|
|
|
Returns:
|
|
Deferred: Resolved when it has successfully been queued for
|
|
processing.
|
|
"""
|
|
yield self.fill_out_prev_events(event)
|
|
|
|
pdu = self.pdu_codec.pdu_from_event(event)
|
|
|
|
if not hasattr(pdu, "destinations") or not pdu.destinations:
|
|
pdu.destinations = []
|
|
|
|
yield self.replication_layer.send_pdu(pdu)
|
|
|
|
@log_function
|
|
@defer.inlineCallbacks
|
|
def backfill(self, dest, room_id, limit):
|
|
pdus = yield self.replication_layer.backfill(dest, room_id, limit)
|
|
|
|
if not pdus:
|
|
defer.returnValue([])
|
|
|
|
events = [
|
|
self.pdu_codec.event_from_pdu(pdu)
|
|
for pdu in pdus
|
|
]
|
|
|
|
defer.returnValue(events)
|
|
|
|
@log_function
|
|
def get_state_for_room(self, destination, room_id):
|
|
return self.replication_layer.get_state_for_context(
|
|
destination, room_id
|
|
)
|
|
|
|
@log_function
|
|
@defer.inlineCallbacks
|
|
def on_receive_pdu(self, pdu, backfilled):
|
|
""" Called by the ReplicationLayer when we have a new pdu. We need to
|
|
do auth checks and put it throught the StateHandler.
|
|
"""
|
|
event = self.pdu_codec.event_from_pdu(pdu)
|
|
|
|
try:
|
|
with (yield self.lock_manager.lock(pdu.context)):
|
|
if event.is_state and not backfilled:
|
|
is_new_state = yield self.state_handler.handle_new_state(
|
|
pdu
|
|
)
|
|
if not is_new_state:
|
|
return
|
|
else:
|
|
is_new_state = False
|
|
|
|
yield self.event_handler.on_receive(event, is_new_state, backfilled)
|
|
|
|
except AuthError:
|
|
# TODO: Implement something in federation that allows us to
|
|
# respond to PDU.
|
|
raise
|
|
|
|
return
|
|
|
|
@defer.inlineCallbacks
|
|
def _on_new_state(self, pdu, new_state_event):
|
|
# TODO: Do any store stuff here. Notifiy C2S about this new
|
|
# state.
|
|
|
|
yield self.store.update_current_state(
|
|
pdu_id=pdu.pdu_id,
|
|
origin=pdu.origin,
|
|
context=pdu.context,
|
|
pdu_type=pdu.pdu_type,
|
|
state_key=pdu.state_key
|
|
)
|
|
|
|
yield self.event_handler.on_receive(new_state_event)
|
|
|
|
@defer.inlineCallbacks
|
|
def fill_out_prev_events(self, event):
|
|
if hasattr(event, "prev_events"):
|
|
return
|
|
|
|
results = yield self.store.get_latest_pdus_in_context(
|
|
event.room_id
|
|
)
|
|
|
|
es = [
|
|
"%s@%s" % (p_id, origin) for p_id, origin, _ in results
|
|
]
|
|
|
|
event.prev_events = [e for e in es if e != event.event_id]
|
|
|
|
if results:
|
|
event.depth = max([int(v) for _, _, v in results]) + 1
|
|
else:
|
|
event.depth = 0
|