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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
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):
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]
state_handler = self.state_handler
if builder.is_state():
ret = yield state_handler.resolve_state_groups(
[e for e, _ in prev_events],
event_type=builder.event_type,
state_key=builder.state_key,
)
group, curr_state, prev_state = ret
prev_state = yield self.store.add_event_hashes(
prev_state
)
builder.prev_state = prev_state
else:
group, curr_state, _ = yield state_handler.resolve_state_groups(
[e for e, _ in prev_events],
)
builder.internal_metadata.state_group = group
builder.prev_events = prev_events
builder.depth = depth
auth_events = yield self.auth.get_event_auth(builder, curr_state)
builder.update_event_key("auth_events", auth_events)
add_hashes_and_signatures(
builder, self.server_name, self.signing_key
)
event = builder.build()
auth_ids = zip(*auth_events)[0]
curr_auth_events = {
k: v
for k, v in curr_state
if v.event_id in auth_ids
}
context = EventContext(
current_state=curr_state,
auth_events=curr_auth_events,
)
defer.returnValue(
(event, context,)
)
@defer.inlineCallbacks
def _handle_new_client_event(self, event, context):
# We now need to go and hit out to wherever we need to hit out to.
self.auth.check(event, auth_events=context.auth_events)
yield self.store.persist_event(event)
destinations = set()
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)
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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