forked from MirrorHub/synapse
632 lines
21 KiB
Python
632 lines
21 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 - 2016 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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"""Contains functions for performing events on rooms."""
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from twisted.internet import defer
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from ._base import BaseHandler
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from synapse.types import UserID, RoomAlias, RoomID, RoomStreamToken
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from synapse.api.constants import (
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EventTypes, JoinRules, RoomCreationPreset,
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)
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from synapse.api.errors import AuthError, StoreError, SynapseError
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from synapse.util import stringutils
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from synapse.util.async import concurrently_execute
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from synapse.util.caches.response_cache import ResponseCache
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from synapse.visibility import filter_events_for_client
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from collections import OrderedDict
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import logging
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import math
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import string
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logger = logging.getLogger(__name__)
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REMOTE_ROOM_LIST_POLL_INTERVAL = 60 * 1000
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id_server_scheme = "https://"
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class RoomCreationHandler(BaseHandler):
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PRESETS_DICT = {
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RoomCreationPreset.PRIVATE_CHAT: {
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"join_rules": JoinRules.INVITE,
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"history_visibility": "shared",
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"original_invitees_have_ops": False,
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},
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RoomCreationPreset.TRUSTED_PRIVATE_CHAT: {
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"join_rules": JoinRules.INVITE,
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"history_visibility": "shared",
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"original_invitees_have_ops": True,
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},
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RoomCreationPreset.PUBLIC_CHAT: {
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"join_rules": JoinRules.PUBLIC,
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"history_visibility": "shared",
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"original_invitees_have_ops": False,
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},
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}
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@defer.inlineCallbacks
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def create_room(self, requester, config):
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""" Creates a new room.
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Args:
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requester (Requester): The user who requested the room creation.
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config (dict) : A dict of configuration options.
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Returns:
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The new room ID.
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Raises:
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SynapseError if the room ID couldn't be stored, or something went
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horribly wrong.
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"""
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user_id = requester.user.to_string()
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self.ratelimit(requester)
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if "room_alias_name" in config:
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for wchar in string.whitespace:
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if wchar in config["room_alias_name"]:
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raise SynapseError(400, "Invalid characters in room alias")
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room_alias = RoomAlias.create(
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config["room_alias_name"],
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self.hs.hostname,
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)
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mapping = yield self.store.get_association_from_room_alias(
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room_alias
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)
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if mapping:
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raise SynapseError(400, "Room alias already taken")
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else:
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room_alias = None
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invite_list = config.get("invite", [])
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for i in invite_list:
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try:
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UserID.from_string(i)
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except:
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raise SynapseError(400, "Invalid user_id: %s" % (i,))
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invite_3pid_list = config.get("invite_3pid", [])
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visibility = config.get("visibility", None)
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is_public = visibility == "public"
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# autogen room IDs and try to create it. We may clash, so just
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# try a few times till one goes through, giving up eventually.
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attempts = 0
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room_id = None
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while attempts < 5:
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try:
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random_string = stringutils.random_string(18)
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gen_room_id = RoomID.create(
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random_string,
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self.hs.hostname,
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)
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yield self.store.store_room(
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room_id=gen_room_id.to_string(),
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room_creator_user_id=user_id,
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is_public=is_public
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)
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room_id = gen_room_id.to_string()
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break
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except StoreError:
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attempts += 1
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if not room_id:
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raise StoreError(500, "Couldn't generate a room ID.")
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if room_alias:
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directory_handler = self.hs.get_handlers().directory_handler
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yield directory_handler.create_association(
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user_id=user_id,
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room_id=room_id,
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room_alias=room_alias,
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servers=[self.hs.hostname],
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)
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preset_config = config.get(
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"preset",
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RoomCreationPreset.PRIVATE_CHAT
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if visibility == "private"
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else RoomCreationPreset.PUBLIC_CHAT
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)
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raw_initial_state = config.get("initial_state", [])
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initial_state = OrderedDict()
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for val in raw_initial_state:
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initial_state[(val["type"], val.get("state_key", ""))] = val["content"]
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creation_content = config.get("creation_content", {})
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msg_handler = self.hs.get_handlers().message_handler
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room_member_handler = self.hs.get_handlers().room_member_handler
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yield self._send_events_for_new_room(
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requester,
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room_id,
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msg_handler,
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room_member_handler,
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preset_config=preset_config,
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invite_list=invite_list,
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initial_state=initial_state,
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creation_content=creation_content,
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room_alias=room_alias,
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)
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if "name" in config:
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name = config["name"]
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yield msg_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.Name,
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"room_id": room_id,
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"sender": user_id,
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"state_key": "",
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"content": {"name": name},
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},
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ratelimit=False)
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if "topic" in config:
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topic = config["topic"]
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yield msg_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.Topic,
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"room_id": room_id,
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"sender": user_id,
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"state_key": "",
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"content": {"topic": topic},
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},
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ratelimit=False)
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for invitee in invite_list:
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yield room_member_handler.update_membership(
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requester,
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UserID.from_string(invitee),
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room_id,
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"invite",
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ratelimit=False,
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)
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for invite_3pid in invite_3pid_list:
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id_server = invite_3pid["id_server"]
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address = invite_3pid["address"]
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medium = invite_3pid["medium"]
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yield self.hs.get_handlers().room_member_handler.do_3pid_invite(
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room_id,
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requester.user,
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medium,
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address,
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id_server,
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requester,
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txn_id=None,
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)
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result = {"room_id": room_id}
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if room_alias:
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result["room_alias"] = room_alias.to_string()
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yield directory_handler.send_room_alias_update_event(
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requester, user_id, room_id
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)
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defer.returnValue(result)
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@defer.inlineCallbacks
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def _send_events_for_new_room(
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self,
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creator, # A Requester object.
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room_id,
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msg_handler,
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room_member_handler,
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preset_config,
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invite_list,
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initial_state,
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creation_content,
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room_alias
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):
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def create(etype, content, **kwargs):
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e = {
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"type": etype,
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"content": content,
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}
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e.update(event_keys)
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e.update(kwargs)
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return e
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@defer.inlineCallbacks
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def send(etype, content, **kwargs):
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event = create(etype, content, **kwargs)
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yield msg_handler.create_and_send_nonmember_event(
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creator,
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event,
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ratelimit=False
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)
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config = RoomCreationHandler.PRESETS_DICT[preset_config]
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creator_id = creator.user.to_string()
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event_keys = {
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"room_id": room_id,
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"sender": creator_id,
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"state_key": "",
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}
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creation_content.update({"creator": creator_id})
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yield send(
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etype=EventTypes.Create,
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content=creation_content,
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)
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yield room_member_handler.update_membership(
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creator,
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creator.user,
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room_id,
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"join",
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ratelimit=False,
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)
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if (EventTypes.PowerLevels, '') not in initial_state:
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power_level_content = {
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"users": {
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creator_id: 100,
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},
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"users_default": 0,
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"events": {
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EventTypes.Name: 50,
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EventTypes.PowerLevels: 100,
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EventTypes.RoomHistoryVisibility: 100,
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EventTypes.CanonicalAlias: 50,
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EventTypes.RoomAvatar: 50,
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},
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"events_default": 0,
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"state_default": 50,
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"ban": 50,
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"kick": 50,
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"redact": 50,
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"invite": 0,
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}
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if config["original_invitees_have_ops"]:
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for invitee in invite_list:
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power_level_content["users"][invitee] = 100
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yield send(
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etype=EventTypes.PowerLevels,
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content=power_level_content,
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)
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if room_alias and (EventTypes.CanonicalAlias, '') not in initial_state:
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yield send(
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etype=EventTypes.CanonicalAlias,
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content={"alias": room_alias.to_string()},
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)
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if (EventTypes.JoinRules, '') not in initial_state:
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yield send(
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etype=EventTypes.JoinRules,
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content={"join_rule": config["join_rules"]},
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)
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if (EventTypes.RoomHistoryVisibility, '') not in initial_state:
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yield send(
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etype=EventTypes.RoomHistoryVisibility,
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content={"history_visibility": config["history_visibility"]}
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)
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for (etype, state_key), content in initial_state.items():
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yield send(
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etype=etype,
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state_key=state_key,
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content=content,
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)
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class RoomListHandler(BaseHandler):
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def __init__(self, hs):
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super(RoomListHandler, self).__init__(hs)
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self.response_cache = ResponseCache()
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self.remote_list_request_cache = ResponseCache()
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self.remote_list_cache = {}
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self.fetch_looping_call = hs.get_clock().looping_call(
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self.fetch_all_remote_lists, REMOTE_ROOM_LIST_POLL_INTERVAL
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)
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self.fetch_all_remote_lists()
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def get_local_public_room_list(self):
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result = self.response_cache.get(())
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if not result:
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result = self.response_cache.set((), self._get_public_room_list())
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return result
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@defer.inlineCallbacks
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def _get_public_room_list(self):
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room_ids = yield self.store.get_public_room_ids()
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results = []
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@defer.inlineCallbacks
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def handle_room(room_id):
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# We pull each bit of state out indvidually to avoid pulling the
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# full state into memory. Due to how the caching works this should
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# be fairly quick, even if not originally in the cache.
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def get_state(etype, state_key):
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return self.state_handler.get_current_state(room_id, etype, state_key)
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# Double check that this is actually a public room.
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join_rules_event = yield get_state(EventTypes.JoinRules, "")
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if join_rules_event:
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join_rule = join_rules_event.content.get("join_rule", None)
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if join_rule and join_rule != JoinRules.PUBLIC:
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defer.returnValue(None)
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result = {"room_id": room_id}
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joined_users = yield self.store.get_users_in_room(room_id)
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if len(joined_users) == 0:
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return
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result["num_joined_members"] = len(joined_users)
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aliases = yield self.store.get_aliases_for_room(room_id)
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if aliases:
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result["aliases"] = aliases
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name_event = yield get_state(EventTypes.Name, "")
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if name_event:
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name = name_event.content.get("name", None)
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if name:
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result["name"] = name
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topic_event = yield get_state(EventTypes.Topic, "")
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if topic_event:
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topic = topic_event.content.get("topic", None)
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if topic:
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result["topic"] = topic
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canonical_event = yield get_state(EventTypes.CanonicalAlias, "")
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if canonical_event:
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canonical_alias = canonical_event.content.get("alias", None)
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if canonical_alias:
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result["canonical_alias"] = canonical_alias
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visibility_event = yield get_state(EventTypes.RoomHistoryVisibility, "")
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visibility = None
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if visibility_event:
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visibility = visibility_event.content.get("history_visibility", None)
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result["world_readable"] = visibility == "world_readable"
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guest_event = yield get_state(EventTypes.GuestAccess, "")
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guest = None
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if guest_event:
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guest = guest_event.content.get("guest_access", None)
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result["guest_can_join"] = guest == "can_join"
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avatar_event = yield get_state("m.room.avatar", "")
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if avatar_event:
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avatar_url = avatar_event.content.get("url", None)
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if avatar_url:
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result["avatar_url"] = avatar_url
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results.append(result)
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yield concurrently_execute(handle_room, room_ids, 10)
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# FIXME (erikj): START is no longer a valid value
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defer.returnValue({"start": "START", "end": "END", "chunk": results})
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@defer.inlineCallbacks
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def fetch_all_remote_lists(self):
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deferred = self.hs.get_replication_layer().get_public_rooms(
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self.hs.config.secondary_directory_servers
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)
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self.remote_list_request_cache.set((), deferred)
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self.remote_list_cache = yield deferred
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@defer.inlineCallbacks
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def get_aggregated_public_room_list(self):
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"""
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Get the public room list from this server and the servers
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specified in the secondary_directory_servers config option.
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XXX: Pagination...
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"""
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# We return the results from out cache which is updated by a looping call,
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# unless we're missing a cache entry, in which case wait for the result
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# of the fetch if there's one in progress. If not, omit that server.
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wait = False
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for s in self.hs.config.secondary_directory_servers:
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if s not in self.remote_list_cache:
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logger.warn("No cached room list from %s: waiting for fetch", s)
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wait = True
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break
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if wait and self.remote_list_request_cache.get(()):
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yield self.remote_list_request_cache.get(())
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public_rooms = yield self.get_local_public_room_list()
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# keep track of which room IDs we've seen so we can de-dup
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room_ids = set()
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# tag all the ones in our list with our server name.
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# Also add the them to the de-deping set
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for room in public_rooms['chunk']:
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room["server_name"] = self.hs.hostname
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room_ids.add(room["room_id"])
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# Now add the results from federation
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for server_name, server_result in self.remote_list_cache.items():
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for room in server_result["chunk"]:
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if room["room_id"] not in room_ids:
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room["server_name"] = server_name
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public_rooms["chunk"].append(room)
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room_ids.add(room["room_id"])
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defer.returnValue(public_rooms)
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class RoomContextHandler(BaseHandler):
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@defer.inlineCallbacks
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def get_event_context(self, user, room_id, event_id, limit, is_guest):
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"""Retrieves events, pagination tokens and state around a given event
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in a room.
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Args:
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user (UserID)
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room_id (str)
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event_id (str)
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limit (int): The maximum number of events to return in total
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(excluding state).
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Returns:
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dict, or None if the event isn't found
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"""
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before_limit = math.floor(limit / 2.)
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after_limit = limit - before_limit
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now_token = yield self.hs.get_event_sources().get_current_token()
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def filter_evts(events):
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return filter_events_for_client(
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self.store,
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user.to_string(),
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events,
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is_peeking=is_guest
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)
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event = yield self.store.get_event(event_id, get_prev_content=True,
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allow_none=True)
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if not event:
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defer.returnValue(None)
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return
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filtered = yield(filter_evts([event]))
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if not filtered:
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raise AuthError(
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403,
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"You don't have permission to access that event."
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)
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results = yield self.store.get_events_around(
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room_id, event_id, before_limit, after_limit
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)
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results["events_before"] = yield filter_evts(results["events_before"])
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results["events_after"] = yield filter_evts(results["events_after"])
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results["event"] = event
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if results["events_after"]:
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last_event_id = results["events_after"][-1].event_id
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else:
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last_event_id = event_id
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state = yield self.store.get_state_for_events(
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[last_event_id], None
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)
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results["state"] = state[last_event_id].values()
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results["start"] = now_token.copy_and_replace(
|
|
"room_key", results["start"]
|
|
).to_string()
|
|
|
|
results["end"] = now_token.copy_and_replace(
|
|
"room_key", results["end"]
|
|
).to_string()
|
|
|
|
defer.returnValue(results)
|
|
|
|
|
|
class RoomEventSource(object):
|
|
def __init__(self, hs):
|
|
self.store = hs.get_datastore()
|
|
|
|
@defer.inlineCallbacks
|
|
def get_new_events(
|
|
self,
|
|
user,
|
|
from_key,
|
|
limit,
|
|
room_ids,
|
|
is_guest,
|
|
):
|
|
# We just ignore the key for now.
|
|
|
|
to_key = yield self.get_current_key()
|
|
|
|
from_token = RoomStreamToken.parse(from_key)
|
|
if from_token.topological:
|
|
logger.warn("Stream has topological part!!!! %r", from_key)
|
|
from_key = "s%s" % (from_token.stream,)
|
|
|
|
app_service = yield self.store.get_app_service_by_user_id(
|
|
user.to_string()
|
|
)
|
|
if app_service:
|
|
events, end_key = yield self.store.get_appservice_room_stream(
|
|
service=app_service,
|
|
from_key=from_key,
|
|
to_key=to_key,
|
|
limit=limit,
|
|
)
|
|
else:
|
|
room_events = yield self.store.get_membership_changes_for_user(
|
|
user.to_string(), from_key, to_key
|
|
)
|
|
|
|
room_to_events = yield self.store.get_room_events_stream_for_rooms(
|
|
room_ids=room_ids,
|
|
from_key=from_key,
|
|
to_key=to_key,
|
|
limit=limit or 10,
|
|
order='ASC',
|
|
)
|
|
|
|
events = list(room_events)
|
|
events.extend(e for evs, _ in room_to_events.values() for e in evs)
|
|
|
|
events.sort(key=lambda e: e.internal_metadata.order)
|
|
|
|
if limit:
|
|
events[:] = events[:limit]
|
|
|
|
if events:
|
|
end_key = events[-1].internal_metadata.after
|
|
else:
|
|
end_key = to_key
|
|
|
|
defer.returnValue((events, end_key))
|
|
|
|
def get_current_key(self, direction='f'):
|
|
return self.store.get_room_events_max_id(direction)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_pagination_rows(self, user, config, key):
|
|
events, next_key = yield self.store.paginate_room_events(
|
|
room_id=key,
|
|
from_key=config.from_key,
|
|
to_key=config.to_key,
|
|
direction=config.direction,
|
|
limit=config.limit,
|
|
)
|
|
|
|
defer.returnValue((events, next_key))
|