159 lines
5.2 KiB
Python
159 lines
5.2 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014, 2015 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer
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from synapse.api.errors import LimitExceededError, SynapseError
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from synapse.crypto.event_signing import add_hashes_and_signatures
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from synapse.api.constants import Membership, EventTypes
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from synapse.types import UserID
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from synapse.util.logcontext import PreserveLoggingContext
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import logging
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logger = logging.getLogger(__name__)
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class BaseHandler(object):
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def __init__(self, hs):
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self.store = hs.get_datastore()
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self.auth = hs.get_auth()
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self.notifier = hs.get_notifier()
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self.state_handler = hs.get_state_handler()
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self.distributor = hs.get_distributor()
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self.ratelimiter = hs.get_ratelimiter()
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self.clock = hs.get_clock()
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self.hs = hs
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self.signing_key = hs.config.signing_key[0]
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self.server_name = hs.hostname
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self.event_builder_factory = hs.get_event_builder_factory()
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def ratelimit(self, user_id):
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time_now = self.clock.time()
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allowed, time_allowed = self.ratelimiter.send_message(
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user_id, time_now,
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msg_rate_hz=self.hs.config.rc_messages_per_second,
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burst_count=self.hs.config.rc_message_burst_count,
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)
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if not allowed:
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raise LimitExceededError(
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retry_after_ms=int(1000*(time_allowed - time_now)),
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)
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@defer.inlineCallbacks
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def _create_new_client_event(self, builder):
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latest_ret = yield self.store.get_latest_events_in_room(
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builder.room_id,
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)
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if latest_ret:
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depth = max([d for _, _, d in latest_ret]) + 1
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else:
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depth = 1
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prev_events = [(e, h) for e, h, _ in latest_ret]
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builder.prev_events = prev_events
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builder.depth = depth
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state_handler = self.state_handler
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context = yield state_handler.compute_event_context(builder)
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if builder.is_state():
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builder.prev_state = context.prev_state_events
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yield self.auth.add_auth_events(builder, context)
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add_hashes_and_signatures(
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builder, self.server_name, self.signing_key
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)
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event = builder.build()
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logger.debug(
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"Created event %s with current state: %s",
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event.event_id, context.current_state,
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)
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defer.returnValue(
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(event, context,)
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)
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@defer.inlineCallbacks
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def handle_new_client_event(self, event, context, extra_destinations=[],
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extra_users=[], suppress_auth=False):
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# We now need to go and hit out to wherever we need to hit out to.
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if not suppress_auth:
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self.auth.check(event, auth_events=context.current_state)
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yield self.store.persist_event(event, context=context)
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federation_handler = self.hs.get_handlers().federation_handler
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if event.type == EventTypes.Member:
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if event.content["membership"] == Membership.INVITE:
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invitee = UserID.from_string(event.state_key)
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if not self.hs.is_mine(invitee):
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# TODO: Can we add signature from remote server in a nicer
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# way? If we have been invited by a remote server, we need
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# to get them to sign the event.
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returned_invite = yield federation_handler.send_invite(
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invitee.domain,
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event,
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)
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# TODO: Make sure the signatures actually are correct.
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event.signatures.update(
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returned_invite.signatures
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)
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destinations = set(extra_destinations)
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for k, s in context.current_state.items():
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try:
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if k[0] == EventTypes.Member:
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if s.content["membership"] == Membership.JOIN:
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destinations.add(
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UserID.from_string(s.state_key).domain
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)
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except SynapseError:
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logger.warn(
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"Failed to get destination from event %s", s.event_id
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)
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with PreserveLoggingContext():
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# Don't block waiting on waking up all the listeners.
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notify_d = self.notifier.on_new_room_event(
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event, extra_users=extra_users
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)
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def log_failure(f):
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logger.warn(
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"Failed to notify about %s: %s",
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event.event_id, f.value
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)
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notify_d.addErrback(log_failure)
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federation_handler.handle_new_event(
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event, destinations=destinations,
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)
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