mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-12-22 15:04:59 -05:00
134 lines
4.8 KiB
Python
134 lines
4.8 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2014 - 2016 OpenMarket Ltd
|
|
#
|
|
# 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 synapse.api.errors import LimitExceededError
|
|
from synapse.api.constants import Membership, EventTypes
|
|
from synapse.types import UserID, Requester
|
|
|
|
|
|
import logging
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class BaseHandler(object):
|
|
"""
|
|
Common base class for the event handlers.
|
|
|
|
Attributes:
|
|
store (synapse.storage.events.StateStore):
|
|
state_handler (synapse.state.StateHandler):
|
|
"""
|
|
|
|
def __init__(self, hs):
|
|
self.store = hs.get_datastore()
|
|
self.auth = hs.get_auth()
|
|
self.notifier = hs.get_notifier()
|
|
self.state_handler = hs.get_state_handler()
|
|
self.distributor = hs.get_distributor()
|
|
self.ratelimiter = hs.get_ratelimiter()
|
|
self.clock = hs.get_clock()
|
|
self.hs = hs
|
|
|
|
self.server_name = hs.hostname
|
|
|
|
self.event_builder_factory = hs.get_event_builder_factory()
|
|
|
|
def ratelimit(self, requester):
|
|
time_now = self.clock.time()
|
|
allowed, time_allowed = self.ratelimiter.send_message(
|
|
requester.user.to_string(), time_now,
|
|
msg_rate_hz=self.hs.config.rc_messages_per_second,
|
|
burst_count=self.hs.config.rc_message_burst_count,
|
|
)
|
|
if not allowed:
|
|
raise LimitExceededError(
|
|
retry_after_ms=int(1000 * (time_allowed - time_now)),
|
|
)
|
|
|
|
def is_host_in_room(self, current_state):
|
|
room_members = [
|
|
(state_key, event.membership)
|
|
for ((event_type, state_key), event) in current_state.items()
|
|
if event_type == EventTypes.Member
|
|
]
|
|
if len(room_members) == 0:
|
|
# Have we just created the room, and is this about to be the very
|
|
# first member event?
|
|
create_event = current_state.get(("m.room.create", ""))
|
|
if create_event:
|
|
return True
|
|
for (state_key, membership) in room_members:
|
|
if (
|
|
self.hs.is_mine_id(state_key)
|
|
and membership == Membership.JOIN
|
|
):
|
|
return True
|
|
return False
|
|
|
|
@defer.inlineCallbacks
|
|
def maybe_kick_guest_users(self, event, current_state):
|
|
# Technically this function invalidates current_state by changing it.
|
|
# Hopefully this isn't that important to the caller.
|
|
if event.type == EventTypes.GuestAccess:
|
|
guest_access = event.content.get("guest_access", "forbidden")
|
|
if guest_access != "can_join":
|
|
yield self.kick_guest_users(current_state)
|
|
|
|
@defer.inlineCallbacks
|
|
def kick_guest_users(self, current_state):
|
|
for member_event in current_state:
|
|
try:
|
|
if member_event.type != EventTypes.Member:
|
|
continue
|
|
|
|
target_user = UserID.from_string(member_event.state_key)
|
|
if not self.hs.is_mine(target_user):
|
|
continue
|
|
|
|
if member_event.content["membership"] not in {
|
|
Membership.JOIN,
|
|
Membership.INVITE
|
|
}:
|
|
continue
|
|
|
|
if (
|
|
"kind" not in member_event.content
|
|
or member_event.content["kind"] != "guest"
|
|
):
|
|
continue
|
|
|
|
# We make the user choose to leave, rather than have the
|
|
# event-sender kick them. This is partially because we don't
|
|
# need to worry about power levels, and partially because guest
|
|
# users are a concept which doesn't hugely work over federation,
|
|
# and having homeservers have their own users leave keeps more
|
|
# of that decision-making and control local to the guest-having
|
|
# homeserver.
|
|
requester = Requester(target_user, "", True)
|
|
handler = self.hs.get_handlers().room_member_handler
|
|
yield handler.update_membership(
|
|
requester,
|
|
target_user,
|
|
member_event.room_id,
|
|
"leave",
|
|
ratelimit=False,
|
|
)
|
|
except Exception as e:
|
|
logger.warn("Error kicking guest user: %s" % (e,))
|