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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.events.room import RoomMemberEvent
from synapse.api.constants import Membership, EventTypes
from synapse.events.snapshot import EventSnapshot, EventContext
import logging
logger = logging.getLogger(__name__)
class BaseHandler(object):
def __init__(self, hs):
self.store = hs.get_datastore()
self.event_factory = hs.get_event_factory()
self.auth = hs.get_auth()
self.notifier = hs.get_notifier()
self.room_lock = hs.get_room_lock_manager()
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):
context = EventContext()
latest_ret = yield self.store.get_latest_events_in_room(
builder.room_id,
)
depth = max([d for _, _, d in latest_ret])
prev_events = [(e, h) for e, h, _ in latest_ret]
builder.prev_events = prev_events
builder.depth = depth
state_handler = self.state_handler
ret = yield state_handler.annotate_context_with_state(
builder,
context,
)
group, prev_state = ret
if builder.is_state():
prev_state = yield self.store.add_event_hashes(
prev_state
)
builder.prev_state = prev_state
builder.internal_metadata.state_group = group
yield self.auth.add_auth_events(builder, context)
add_hashes_and_signatures(
builder, self.server_name, self.signing_key
)
event = builder.build()
defer.returnValue(
(event, context,)
)
@defer.inlineCallbacks
def handle_new_client_event(self, event, context, extra_destinations=[],
extra_users=[], suppress_auth=False):
# 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)
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)
federation_handler = self.hs.get_handlers().federation_handler
yield federation_handler.handle_new_event(
event,
None,
destinations=destinations,
)
# @defer.inlineCallbacks
# def _on_new_room_event(self, event, snapshot, extra_destinations=[],
# extra_users=[], suppress_auth=False,
# do_invite_host=None):
# yield run_on_reactor()
#
# snapshot.fill_out_prev_events(event)
#
# yield self.state_handler.annotate_event_with_state(event)
#
# yield self.auth.add_auth_events(event)
#
# logger.debug("Signing event...")
#
# add_hashes_and_signatures(
# event, self.server_name, self.signing_key
# )
#
# logger.debug("Signed event.")
#
# if not suppress_auth:
# logger.debug("Authing...")
# self.auth.check(event, auth_events=event.old_state_events)
# logger.debug("Authed")
# else:
# logger.debug("Suppressed auth.")
#
# if do_invite_host:
# federation_handler = self.hs.get_handlers().federation_handler
# invite_event = yield federation_handler.send_invite(
# do_invite_host,
# event
# )
#
# # FIXME: We need to check if the remote changed anything else
# event.signatures = invite_event.signatures
#
# yield self.store.persist_event(event)
#
# destinations = set(extra_destinations)
# # Send a PDU to all hosts who have joined the room.
#
# for k, s in event.state_events.items():
# try:
# if k[0] == RoomMemberEvent.TYPE:
# if s.content["membership"] == Membership.JOIN:
# destinations.add(
# self.hs.parse_userid(s.state_key).domain
# )
# except:
# logger.warn(
# "Failed to get destination from event %s", s.event_id
# )
#
# event.destinations = list(destinations)
#
# yield self.notifier.on_new_room_event(event, extra_users=extra_users)
#
# federation_handler = self.hs.get_handlers().federation_handler
# yield federation_handler.handle_new_event(event, snapshot)
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