158 lines
		
	
	
		
			5.5 KiB
		
	
	
	
		
			Python
		
	
	
			
		
		
	
	
			158 lines
		
	
	
		
			5.5 KiB
		
	
	
	
		
			Python
		
	
	
# -*- coding: utf-8 -*-
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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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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import logging
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from synapse.api.constants import Membership
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from synapse.http.servlet import (
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    RestServlet,
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    assert_params_in_dict,
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    parse_json_object_from_request,
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)
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from synapse.rest.admin._base import (
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    assert_user_is_admin,
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    historical_admin_path_patterns,
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)
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from synapse.types import create_requester
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from synapse.util.async_helpers import maybe_awaitable
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logger = logging.getLogger(__name__)
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class ShutdownRoomRestServlet(RestServlet):
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    """Shuts down a room by removing all local users from the room and blocking
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    all future invites and joins to the room. Any local aliases will be repointed
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    to a new room created by `new_room_user_id` and kicked users will be auto
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    joined to the new room.
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    """
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    PATTERNS = historical_admin_path_patterns("/shutdown_room/(?P<room_id>[^/]+)")
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    DEFAULT_MESSAGE = (
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        "Sharing illegal content on this server is not permitted and rooms in"
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        " violation will be blocked."
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    )
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    def __init__(self, hs):
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        self.hs = hs
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        self.store = hs.get_datastore()
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        self.state = hs.get_state_handler()
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        self._room_creation_handler = hs.get_room_creation_handler()
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        self.event_creation_handler = hs.get_event_creation_handler()
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        self.room_member_handler = hs.get_room_member_handler()
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        self.auth = hs.get_auth()
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    async def on_POST(self, request, room_id):
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        requester = await self.auth.get_user_by_req(request)
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        await assert_user_is_admin(self.auth, requester.user)
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        content = parse_json_object_from_request(request)
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        assert_params_in_dict(content, ["new_room_user_id"])
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        new_room_user_id = content["new_room_user_id"]
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        room_creator_requester = create_requester(new_room_user_id)
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        message = content.get("message", self.DEFAULT_MESSAGE)
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        room_name = content.get("room_name", "Content Violation Notification")
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        info = await self._room_creation_handler.create_room(
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            room_creator_requester,
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            config={
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                "preset": "public_chat",
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                "name": room_name,
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                "power_level_content_override": {"users_default": -10},
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            },
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            ratelimit=False,
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        )
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        new_room_id = info["room_id"]
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        requester_user_id = requester.user.to_string()
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        logger.info(
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            "Shutting down room %r, joining to new room: %r", room_id, new_room_id
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        )
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        # This will work even if the room is already blocked, but that is
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        # desirable in case the first attempt at blocking the room failed below.
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        await self.store.block_room(room_id, requester_user_id)
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        users = await self.state.get_current_users_in_room(room_id)
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        kicked_users = []
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        failed_to_kick_users = []
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        for user_id in users:
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            if not self.hs.is_mine_id(user_id):
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                continue
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            logger.info("Kicking %r from %r...", user_id, room_id)
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            try:
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                target_requester = create_requester(user_id)
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                await self.room_member_handler.update_membership(
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                    requester=target_requester,
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                    target=target_requester.user,
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                    room_id=room_id,
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                    action=Membership.LEAVE,
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                    content={},
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                    ratelimit=False,
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                    require_consent=False,
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                )
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                await self.room_member_handler.forget(target_requester.user, room_id)
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                await self.room_member_handler.update_membership(
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                    requester=target_requester,
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                    target=target_requester.user,
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                    room_id=new_room_id,
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                    action=Membership.JOIN,
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                    content={},
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                    ratelimit=False,
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                    require_consent=False,
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                )
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                kicked_users.append(user_id)
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            except Exception:
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                logger.exception(
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                    "Failed to leave old room and join new room for %r", user_id
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                )
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                failed_to_kick_users.append(user_id)
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        await self.event_creation_handler.create_and_send_nonmember_event(
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            room_creator_requester,
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            {
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                "type": "m.room.message",
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                "content": {"body": message, "msgtype": "m.text"},
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                "room_id": new_room_id,
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                "sender": new_room_user_id,
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            },
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            ratelimit=False,
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        )
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        aliases_for_room = await maybe_awaitable(
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            self.store.get_aliases_for_room(room_id)
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        )
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        await self.store.update_aliases_for_room(
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            room_id, new_room_id, requester_user_id
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        )
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        return (
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            200,
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            {
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                "kicked_users": kicked_users,
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                "failed_to_kick_users": failed_to_kick_users,
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                "local_aliases": aliases_for_room,
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                "new_room_id": new_room_id,
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            },
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        )
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