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# -*- coding: utf-8 -*-
# Copyright 2014 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, SynapseError
from synapse.util.async import run_on_reactor
from synapse.crypto.event_signing import add_hashes_and_signatures
from synapse.api.constants import Membership, EventTypes
from synapse.events.snapshot import EventContext
import logging
logger = logging.getLogger(__name__)
class BaseHandler(object):
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.signing_key = hs.config.signing_key[0]
self.server_name = hs.hostname
self.event_builder_factory = hs.get_event_builder_factory()
def ratelimit(self, user_id):
time_now = self.clock.time()
allowed, time_allowed = self.ratelimiter.send_message(
user_id, 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)),
)
@defer.inlineCallbacks
def _create_new_client_event(self, builder):
yield run_on_reactor()
latest_ret = yield self.store.get_latest_events_in_room(
builder.room_id,
)
if latest_ret:
depth = max([d for _, _, d in latest_ret]) + 1
else:
depth = 1
prev_events = [(e, h) for e, h, _ in latest_ret]
builder.prev_events = prev_events
builder.depth = depth
state_handler = self.state_handler
context = EventContext()
ret = yield state_handler.annotate_context_with_state(
builder,
context,
)
prev_state = ret
if builder.is_state():
builder.prev_state = prev_state
yield self.auth.add_auth_events(builder, context)
add_hashes_and_signatures(
builder, self.server_name, self.signing_key
)
event = builder.build()
logger.debug(
"Created event %s with auth_events: %s, current state: %s",
event.event_id, context.auth_events, context.current_state,
)
defer.returnValue(
(event, context,)
)
@defer.inlineCallbacks
def handle_new_client_event(self, event, context, extra_destinations=[],
extra_users=[], suppress_auth=False):
yield run_on_reactor()
# We now need to go and hit out to wherever we need to hit out to.
if not suppress_auth:
self.auth.check(event, auth_events=context.auth_events)
yield self.store.persist_event(event, context=context)
federation_handler = self.hs.get_handlers().federation_handler
if event.type == EventTypes.Member:
if event.content["membership"] == Membership.INVITE:
invitee = self.hs.parse_userid(event.state_key)
if not self.hs.is_mine(invitee):
# TODO: Can we add signature from remote server in a nicer
# way? If we have been invited by a remote server, we need
# to get them to sign the event.
returned_invite = yield federation_handler.send_invite(
invitee.domain,
event,
)
# TODO: Make sure the signatures actually are correct.
event.signatures.update(
returned_invite.signatures
)
destinations = set(extra_destinations)
for k, s in context.current_state.items():
try:
if k[0] == EventTypes.Member:
if s.content["membership"] == Membership.JOIN:
destinations.add(
self.hs.parse_userid(s.state_key).domain
)
except SynapseError:
logger.warn(
"Failed to get destination from event %s", s.event_id
)
yield self.notifier.on_new_room_event(event, extra_users=extra_users)
yield federation_handler.handle_new_event(
event,
None,
destinations=destinations,
)
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