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# -*- coding: utf-8 -*-
# Copyright 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.
import logging
from twisted.internet import defer
from synapse.api.errors import SynapseError
from synapse.types import UserID, get_domain_from_id
from synapse.util.stringutils import random_string
logger = logging.getLogger(__name__)
class DeviceMessageHandler(object):
def __init__(self, hs):
"""
Args:
hs (synapse.server.HomeServer): server
"""
self.store = hs.get_datastore()
self.notifier = hs.get_notifier()
self.is_mine = hs.is_mine
self.federation = hs.get_federation_sender()
hs.get_federation_registry().register_edu_handler(
"m.direct_to_device", self.on_direct_to_device_edu
)
@defer.inlineCallbacks
def on_direct_to_device_edu(self, origin, content):
local_messages = {}
sender_user_id = content["sender"]
if origin != get_domain_from_id(sender_user_id):
logger.warn(
"Dropping device message from %r with spoofed sender %r",
origin, sender_user_id
)
message_type = content["type"]
message_id = content["message_id"]
for user_id, by_device in content["messages"].items():
# we use UserID.from_string to catch invalid user ids
if not self.is_mine(UserID.from_string(user_id)):
logger.warning("Request for keys for non-local user %s",
user_id)
raise SynapseError(400, "Not a user here")
messages_by_device = {
device_id: {
"content": message_content,
"type": message_type,
"sender": sender_user_id,
}
for device_id, message_content in by_device.items()
}
if messages_by_device:
local_messages[user_id] = messages_by_device
stream_id = yield self.store.add_messages_from_remote_to_device_inbox(
origin, message_id, local_messages
)
self.notifier.on_new_event(
"to_device_key", stream_id, users=local_messages.keys()
)
@defer.inlineCallbacks
def send_device_message(self, sender_user_id, message_type, messages):
local_messages = {}
remote_messages = {}
for user_id, by_device in messages.items():
# we use UserID.from_string to catch invalid user ids
if self.is_mine(UserID.from_string(user_id)):
messages_by_device = {
device_id: {
"content": message_content,
"type": message_type,
"sender": sender_user_id,
}
for device_id, message_content in by_device.items()
}
if messages_by_device:
local_messages[user_id] = messages_by_device
else:
destination = get_domain_from_id(user_id)
remote_messages.setdefault(destination, {})[user_id] = by_device
message_id = random_string(16)
remote_edu_contents = {}
for destination, messages in remote_messages.items():
remote_edu_contents[destination] = {
"messages": messages,
"sender": sender_user_id,
"type": message_type,
"message_id": message_id,
}
stream_id = yield self.store.add_messages_to_device_inbox(
local_messages, remote_edu_contents
)
self.notifier.on_new_event(
"to_device_key", stream_id, users=local_messages.keys()
)
for destination in remote_messages.keys():
# Enqueue a new federation transaction to send the new
# device messages to each remote destination.
self.federation.send_device_messages(destination)
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