2029 lines
79 KiB
Python
2029 lines
79 KiB
Python
# Copyright 2016-2021 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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"""Contains functions for performing actions on rooms."""
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import itertools
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import logging
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import math
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import random
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import string
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from collections import OrderedDict
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from http import HTTPStatus
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from typing import TYPE_CHECKING, Any, Awaitable, Callable, Dict, List, Optional, Tuple
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import attr
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from typing_extensions import TypedDict
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import synapse.events.snapshot
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from synapse.api.constants import (
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Direction,
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EventContentFields,
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EventTypes,
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GuestAccess,
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HistoryVisibility,
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JoinRules,
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Membership,
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RoomCreationPreset,
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RoomEncryptionAlgorithms,
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RoomTypes,
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)
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from synapse.api.errors import (
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AuthError,
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Codes,
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LimitExceededError,
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NotFoundError,
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PartialStateConflictError,
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StoreError,
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SynapseError,
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)
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from synapse.api.filtering import Filter
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from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersion
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from synapse.event_auth import validate_event_for_room_version
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from synapse.events import EventBase
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from synapse.events.snapshot import UnpersistedEventContext
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from synapse.events.utils import copy_and_fixup_power_levels_contents
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from synapse.handlers.relations import BundledAggregations
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from synapse.rest.admin._base import assert_user_is_admin
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from synapse.streams import EventSource
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from synapse.types import (
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JsonDict,
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JsonMapping,
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MutableStateMap,
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Requester,
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RoomAlias,
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RoomID,
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RoomStreamToken,
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StateMap,
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StrCollection,
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StreamKeyType,
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StreamToken,
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UserID,
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create_requester,
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)
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from synapse.types.state import StateFilter
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from synapse.util import stringutils
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from synapse.util.caches.response_cache import ResponseCache
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from synapse.util.stringutils import parse_and_validate_server_name
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from synapse.visibility import filter_events_for_client
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
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id_server_scheme = "https://"
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FIVE_MINUTES_IN_MS = 5 * 60 * 1000
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@attr.s(slots=True, frozen=True, auto_attribs=True)
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class EventContext:
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events_before: List[EventBase]
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event: EventBase
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events_after: List[EventBase]
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state: List[EventBase]
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aggregations: Dict[str, BundledAggregations]
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start: str
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end: str
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class RoomCreationHandler:
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def __init__(self, hs: "HomeServer"):
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self.store = hs.get_datastores().main
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self._storage_controllers = hs.get_storage_controllers()
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self.auth = hs.get_auth()
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self.auth_blocking = hs.get_auth_blocking()
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self.clock = hs.get_clock()
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self.hs = hs
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self._spam_checker_module_callbacks = hs.get_module_api_callbacks().spam_checker
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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._event_auth_handler = hs.get_event_auth_handler()
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self.config = hs.config
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self.request_ratelimiter = hs.get_request_ratelimiter()
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# Room state based off defined presets
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self._presets_dict: Dict[str, Dict[str, Any]] = {
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RoomCreationPreset.PRIVATE_CHAT: {
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"join_rules": JoinRules.INVITE,
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"history_visibility": HistoryVisibility.SHARED,
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"original_invitees_have_ops": False,
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"guest_can_join": True,
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"power_level_content_override": {"invite": 0},
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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": HistoryVisibility.SHARED,
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"original_invitees_have_ops": True,
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"guest_can_join": True,
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"power_level_content_override": {"invite": 0},
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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": HistoryVisibility.SHARED,
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"original_invitees_have_ops": False,
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"guest_can_join": False,
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"power_level_content_override": {},
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},
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}
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# Modify presets to selectively enable encryption by default per homeserver config
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for preset_name, preset_config in self._presets_dict.items():
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encrypted = (
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preset_name
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in self.config.room.encryption_enabled_by_default_for_room_presets
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)
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preset_config["encrypted"] = encrypted
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self._default_power_level_content_override = (
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self.config.room.default_power_level_content_override
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)
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self._replication = hs.get_replication_data_handler()
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# If a user tries to update the same room multiple times in quick
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# succession, only process the first attempt and return its result to
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# subsequent requests
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self._upgrade_response_cache: ResponseCache[Tuple[str, str]] = ResponseCache(
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hs.get_clock(), "room_upgrade", timeout_ms=FIVE_MINUTES_IN_MS
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)
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self._server_notices_mxid = hs.config.servernotices.server_notices_mxid
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self._third_party_event_rules = (
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hs.get_module_api_callbacks().third_party_event_rules
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)
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async def upgrade_room(
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self, requester: Requester, old_room_id: str, new_version: RoomVersion
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) -> str:
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"""Replace a room with a new room with a different version
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Args:
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requester: the user requesting the upgrade
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old_room_id: the id of the room to be replaced
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new_version: the new room version to use
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Returns:
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the new room id
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Raises:
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ShadowBanError if the requester is shadow-banned.
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"""
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await self.request_ratelimiter.ratelimit(requester)
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user_id = requester.user.to_string()
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# Check if this room is already being upgraded by another person
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for key in self._upgrade_response_cache.keys():
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if key[0] == old_room_id and key[1] != user_id:
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# Two different people are trying to upgrade the same room.
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# Send the second an error.
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#
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# Note that this of course only gets caught if both users are
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# on the same homeserver.
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raise SynapseError(
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400, "An upgrade for this room is currently in progress"
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)
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# Check whether the room exists and 404 if it doesn't.
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# We could go straight for the auth check, but that will raise a 403 instead.
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old_room = await self.store.get_room(old_room_id)
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if old_room is None:
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raise NotFoundError("Unknown room id %s" % (old_room_id,))
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new_room_id = self._generate_room_id()
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# Try several times, it could fail with PartialStateConflictError
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# in _upgrade_room, cf comment in except block.
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max_retries = 5
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for i in range(max_retries):
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try:
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# Check whether the user has the power level to carry out the upgrade.
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# `check_auth_rules_from_context` will check that they are in the room and have
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# the required power level to send the tombstone event.
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(
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tombstone_event,
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tombstone_unpersisted_context,
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) = await self.event_creation_handler.create_event(
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requester,
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{
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"type": EventTypes.Tombstone,
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"state_key": "",
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"room_id": old_room_id,
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"sender": user_id,
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"content": {
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"body": "This room has been replaced",
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"replacement_room": new_room_id,
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},
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},
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)
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tombstone_context = await tombstone_unpersisted_context.persist(
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tombstone_event
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)
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validate_event_for_room_version(tombstone_event)
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await self._event_auth_handler.check_auth_rules_from_context(
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tombstone_event
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)
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# Upgrade the room
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#
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# If this user has sent multiple upgrade requests for the same room
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# and one of them is not complete yet, cache the response and
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# return it to all subsequent requests
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ret = await self._upgrade_response_cache.wrap(
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(old_room_id, user_id),
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self._upgrade_room,
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requester,
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old_room_id,
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old_room, # args for _upgrade_room
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new_room_id,
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new_version,
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tombstone_event,
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tombstone_context,
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)
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return ret
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except PartialStateConflictError as e:
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# Clean up the cache so we can retry properly
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self._upgrade_response_cache.unset((old_room_id, user_id))
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# Persisting couldn't happen because the room got un-partial stated
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# in the meantime and context needs to be recomputed, so let's do so.
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if i == max_retries - 1:
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raise e
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# This is to satisfy mypy and should never happen
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raise PartialStateConflictError()
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async def _upgrade_room(
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self,
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requester: Requester,
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old_room_id: str,
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old_room: Dict[str, Any],
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new_room_id: str,
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new_version: RoomVersion,
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tombstone_event: EventBase,
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tombstone_context: synapse.events.snapshot.EventContext,
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) -> str:
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"""
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Args:
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requester: the user requesting the upgrade
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old_room_id: the id of the room to be replaced
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old_room: a dict containing room information for the room to be replaced,
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as returned by `RoomWorkerStore.get_room`.
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new_room_id: the id of the replacement room
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new_version: the version to upgrade the room to
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tombstone_event: the tombstone event to send to the old room
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tombstone_context: the context for the tombstone event
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Raises:
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ShadowBanError if the requester is shadow-banned.
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"""
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user_id = requester.user.to_string()
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assert self.hs.is_mine_id(user_id), "User must be our own: %s" % (user_id,)
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logger.info("Creating new room %s to replace %s", new_room_id, old_room_id)
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# create the new room. may raise a `StoreError` in the exceedingly unlikely
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# event of a room ID collision.
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await self.store.store_room(
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room_id=new_room_id,
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room_creator_user_id=user_id,
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is_public=old_room["is_public"],
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room_version=new_version,
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)
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await self.clone_existing_room(
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requester,
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old_room_id=old_room_id,
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new_room_id=new_room_id,
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new_room_version=new_version,
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tombstone_event_id=tombstone_event.event_id,
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)
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# now send the tombstone
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await self.event_creation_handler.handle_new_client_event(
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requester=requester,
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events_and_context=[(tombstone_event, tombstone_context)],
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)
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state_filter = StateFilter.from_types(
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[(EventTypes.CanonicalAlias, ""), (EventTypes.PowerLevels, "")]
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)
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old_room_state = await tombstone_context.get_current_state_ids(state_filter)
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# We know the tombstone event isn't an outlier so it has current state.
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assert old_room_state is not None
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# update any aliases
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await self._move_aliases_to_new_room(
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requester, old_room_id, new_room_id, old_room_state
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)
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# Copy over user push rules, tags and migrate room directory state
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await self.room_member_handler.transfer_room_state_on_room_upgrade(
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old_room_id, new_room_id
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)
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# finally, shut down the PLs in the old room, and update them in the new
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# room.
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await self._update_upgraded_room_pls(
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requester,
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old_room_id,
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new_room_id,
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old_room_state,
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)
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return new_room_id
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async def _update_upgraded_room_pls(
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self,
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requester: Requester,
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old_room_id: str,
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new_room_id: str,
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old_room_state: StateMap[str],
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) -> None:
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"""Send updated power levels in both rooms after an upgrade
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Args:
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requester: the user requesting the upgrade
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old_room_id: the id of the room to be replaced
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new_room_id: the id of the replacement room
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old_room_state: the state map for the old room
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Raises:
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ShadowBanError if the requester is shadow-banned.
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"""
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old_room_pl_event_id = old_room_state.get((EventTypes.PowerLevels, ""))
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if old_room_pl_event_id is None:
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logger.warning(
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"Not supported: upgrading a room with no PL event. Not setting PLs "
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"in old room."
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)
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return
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old_room_pl_state = await self.store.get_event(old_room_pl_event_id)
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# we try to stop regular users from speaking by setting the PL required
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# to send regular events and invites to 'Moderator' level. That's normally
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# 50, but if the default PL in a room is 50 or more, then we set the
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# required PL above that.
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pl_content = copy_and_fixup_power_levels_contents(old_room_pl_state.content)
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users_default: int = pl_content.get("users_default", 0) # type: ignore[assignment]
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restricted_level = max(users_default + 1, 50)
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updated = False
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for v in ("invite", "events_default"):
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current: int = pl_content.get(v, 0) # type: ignore[assignment]
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if current < restricted_level:
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logger.debug(
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"Setting level for %s in %s to %i (was %i)",
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v,
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old_room_id,
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restricted_level,
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current,
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)
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pl_content[v] = restricted_level
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updated = True
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else:
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logger.debug("Not setting level for %s (already %i)", v, current)
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if updated:
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try:
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await self.event_creation_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.PowerLevels,
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"state_key": "",
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"room_id": old_room_id,
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"sender": requester.user.to_string(),
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"content": pl_content,
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},
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ratelimit=False,
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)
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except AuthError as e:
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logger.warning("Unable to update PLs in old room: %s", e)
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await self.event_creation_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.PowerLevels,
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"state_key": "",
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"room_id": new_room_id,
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"sender": requester.user.to_string(),
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"content": copy_and_fixup_power_levels_contents(
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old_room_pl_state.content
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),
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},
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ratelimit=False,
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)
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async def clone_existing_room(
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self,
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requester: Requester,
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old_room_id: str,
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new_room_id: str,
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new_room_version: RoomVersion,
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tombstone_event_id: str,
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) -> None:
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"""Populate a new room based on an old room
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Args:
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requester: the user requesting the upgrade
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old_room_id : the id of the room to be replaced
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new_room_id: the id to give the new room (should already have been
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created with _generate_room_id())
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new_room_version: the new room version to use
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tombstone_event_id: the ID of the tombstone event in the old room.
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"""
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user_id = requester.user.to_string()
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spam_check = await self._spam_checker_module_callbacks.user_may_create_room(
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user_id
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)
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if spam_check != self._spam_checker_module_callbacks.NOT_SPAM:
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raise SynapseError(
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403,
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"You are not permitted to create rooms",
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errcode=spam_check[0],
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additional_fields=spam_check[1],
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)
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creation_content: JsonDict = {
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"room_version": new_room_version.identifier,
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"predecessor": {"room_id": old_room_id, "event_id": tombstone_event_id},
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}
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# Check if old room was non-federatable
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# Get old room's create event
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old_room_create_event = await self.store.get_create_event_for_room(old_room_id)
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# Check if the create event specified a non-federatable room
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if not old_room_create_event.content.get(EventContentFields.FEDERATE, True):
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# If so, mark the new room as non-federatable as well
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creation_content[EventContentFields.FEDERATE] = False
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initial_state = {}
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# Replicate relevant room events
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types_to_copy: List[Tuple[str, Optional[str]]] = [
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(EventTypes.JoinRules, ""),
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(EventTypes.Name, ""),
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(EventTypes.Topic, ""),
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(EventTypes.RoomHistoryVisibility, ""),
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(EventTypes.GuestAccess, ""),
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(EventTypes.RoomAvatar, ""),
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(EventTypes.RoomEncryption, ""),
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(EventTypes.ServerACL, ""),
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(EventTypes.PowerLevels, ""),
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]
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# Copy the room type as per MSC3818.
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room_type = old_room_create_event.content.get(EventContentFields.ROOM_TYPE)
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if room_type is not None:
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creation_content[EventContentFields.ROOM_TYPE] = room_type
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# If the old room was a space, copy over the rooms in the space.
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if room_type == RoomTypes.SPACE:
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types_to_copy.append((EventTypes.SpaceChild, None))
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old_room_state_ids = (
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await self._storage_controllers.state.get_current_state_ids(
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old_room_id, StateFilter.from_types(types_to_copy)
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)
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)
|
|
# map from event_id to BaseEvent
|
|
old_room_state_events = await self.store.get_events(old_room_state_ids.values())
|
|
|
|
for k, old_event_id in old_room_state_ids.items():
|
|
old_event = old_room_state_events.get(old_event_id)
|
|
if old_event:
|
|
# If the event is an space child event with empty content, it was
|
|
# removed from the space and should be ignored.
|
|
if k[0] == EventTypes.SpaceChild and not old_event.content:
|
|
continue
|
|
|
|
initial_state[k] = old_event.content
|
|
|
|
# deep-copy the power-levels event before we start modifying it
|
|
# note that if frozen_dicts are enabled, `power_levels` will be a frozen
|
|
# dict so we can't just copy.deepcopy it.
|
|
initial_state[
|
|
(EventTypes.PowerLevels, "")
|
|
] = power_levels = copy_and_fixup_power_levels_contents(
|
|
initial_state[(EventTypes.PowerLevels, "")]
|
|
)
|
|
|
|
# Resolve the minimum power level required to send any state event
|
|
# We will give the upgrading user this power level temporarily (if necessary) such that
|
|
# they are able to copy all of the state events over, then revert them back to their
|
|
# original power level afterwards in _update_upgraded_room_pls
|
|
|
|
# Copy over user power levels now as this will not be possible with >100PL users once
|
|
# the room has been created
|
|
# Calculate the minimum power level needed to clone the room
|
|
event_power_levels = power_levels.get("events", {})
|
|
if not isinstance(event_power_levels, dict):
|
|
event_power_levels = {}
|
|
state_default = power_levels.get("state_default", 50)
|
|
try:
|
|
state_default_int = int(state_default) # type: ignore[arg-type]
|
|
except (TypeError, ValueError):
|
|
state_default_int = 50
|
|
ban = power_levels.get("ban", 50)
|
|
try:
|
|
ban = int(ban) # type: ignore[arg-type]
|
|
except (TypeError, ValueError):
|
|
ban = 50
|
|
needed_power_level = max(
|
|
state_default_int, ban, max(event_power_levels.values())
|
|
)
|
|
|
|
# Get the user's current power level, this matches the logic in get_user_power_level,
|
|
# but without the entire state map.
|
|
user_power_levels = power_levels.setdefault("users", {})
|
|
if not isinstance(user_power_levels, dict):
|
|
user_power_levels = {}
|
|
users_default = power_levels.get("users_default", 0)
|
|
current_power_level = user_power_levels.get(user_id, users_default)
|
|
try:
|
|
current_power_level_int = int(current_power_level) # type: ignore[arg-type]
|
|
except (TypeError, ValueError):
|
|
current_power_level_int = 0
|
|
# Raise the requester's power level in the new room if necessary
|
|
if current_power_level_int < needed_power_level:
|
|
user_power_levels[user_id] = needed_power_level
|
|
|
|
await self._send_events_for_new_room(
|
|
requester,
|
|
new_room_id,
|
|
new_room_version,
|
|
# we expect to override all the presets with initial_state, so this is
|
|
# somewhat arbitrary.
|
|
room_config={"preset": RoomCreationPreset.PRIVATE_CHAT},
|
|
invite_list=[],
|
|
initial_state=initial_state,
|
|
creation_content=creation_content,
|
|
)
|
|
|
|
# Transfer membership events
|
|
old_room_member_state_ids = (
|
|
await self._storage_controllers.state.get_current_state_ids(
|
|
old_room_id, StateFilter.from_types([(EventTypes.Member, None)])
|
|
)
|
|
)
|
|
|
|
# map from event_id to BaseEvent
|
|
old_room_member_state_events = await self.store.get_events(
|
|
old_room_member_state_ids.values()
|
|
)
|
|
for old_event in old_room_member_state_events.values():
|
|
# Only transfer ban events
|
|
if (
|
|
"membership" in old_event.content
|
|
and old_event.content["membership"] == "ban"
|
|
):
|
|
await self.room_member_handler.update_membership(
|
|
requester,
|
|
UserID.from_string(old_event.state_key),
|
|
new_room_id,
|
|
"ban",
|
|
ratelimit=False,
|
|
content=old_event.content,
|
|
)
|
|
|
|
# XXX invites/joins
|
|
# XXX 3pid invites
|
|
|
|
async def _move_aliases_to_new_room(
|
|
self,
|
|
requester: Requester,
|
|
old_room_id: str,
|
|
new_room_id: str,
|
|
old_room_state: StateMap[str],
|
|
) -> None:
|
|
# check to see if we have a canonical alias.
|
|
canonical_alias_event = None
|
|
canonical_alias_event_id = old_room_state.get((EventTypes.CanonicalAlias, ""))
|
|
if canonical_alias_event_id:
|
|
canonical_alias_event = await self.store.get_event(canonical_alias_event_id)
|
|
|
|
await self.store.update_aliases_for_room(old_room_id, new_room_id)
|
|
|
|
if not canonical_alias_event:
|
|
return
|
|
|
|
# If there is a canonical alias we need to update the one in the old
|
|
# room and set one in the new one.
|
|
old_canonical_alias_content = dict(canonical_alias_event.content)
|
|
new_canonical_alias_content = {}
|
|
|
|
canonical = canonical_alias_event.content.get("alias")
|
|
if canonical and self.hs.is_mine_id(canonical):
|
|
new_canonical_alias_content["alias"] = canonical
|
|
old_canonical_alias_content.pop("alias", None)
|
|
|
|
# We convert to a list as it will be a Tuple.
|
|
old_alt_aliases = list(old_canonical_alias_content.get("alt_aliases", []))
|
|
if old_alt_aliases:
|
|
old_canonical_alias_content["alt_aliases"] = old_alt_aliases
|
|
new_alt_aliases = new_canonical_alias_content.setdefault("alt_aliases", [])
|
|
for alias in canonical_alias_event.content.get("alt_aliases", []):
|
|
try:
|
|
if self.hs.is_mine_id(alias):
|
|
new_alt_aliases.append(alias)
|
|
old_alt_aliases.remove(alias)
|
|
except Exception:
|
|
logger.info(
|
|
"Invalid alias %s in canonical alias event %s",
|
|
alias,
|
|
canonical_alias_event_id,
|
|
)
|
|
|
|
if not old_alt_aliases:
|
|
old_canonical_alias_content.pop("alt_aliases")
|
|
|
|
# If a canonical alias event existed for the old room, fire a canonical
|
|
# alias event for the new room with a copy of the information.
|
|
try:
|
|
await self.event_creation_handler.create_and_send_nonmember_event(
|
|
requester,
|
|
{
|
|
"type": EventTypes.CanonicalAlias,
|
|
"state_key": "",
|
|
"room_id": old_room_id,
|
|
"sender": requester.user.to_string(),
|
|
"content": old_canonical_alias_content,
|
|
},
|
|
ratelimit=False,
|
|
)
|
|
except SynapseError as e:
|
|
# again I'm not really expecting this to fail, but if it does, I'd rather
|
|
# we returned the new room to the client at this point.
|
|
logger.error("Unable to send updated alias events in old room: %s", e)
|
|
|
|
try:
|
|
await self.event_creation_handler.create_and_send_nonmember_event(
|
|
requester,
|
|
{
|
|
"type": EventTypes.CanonicalAlias,
|
|
"state_key": "",
|
|
"room_id": new_room_id,
|
|
"sender": requester.user.to_string(),
|
|
"content": new_canonical_alias_content,
|
|
},
|
|
ratelimit=False,
|
|
)
|
|
except SynapseError as e:
|
|
# again I'm not really expecting this to fail, but if it does, I'd rather
|
|
# we returned the new room to the client at this point.
|
|
logger.error("Unable to send updated alias events in new room: %s", e)
|
|
|
|
async def create_room(
|
|
self,
|
|
requester: Requester,
|
|
config: JsonDict,
|
|
ratelimit: bool = True,
|
|
creator_join_profile: Optional[JsonDict] = None,
|
|
) -> Tuple[str, Optional[RoomAlias], int]:
|
|
"""Creates a new room.
|
|
|
|
Args:
|
|
requester: The user who requested the room creation.
|
|
config: A dict of configuration options. This will be the body of
|
|
a /createRoom request; see
|
|
https://spec.matrix.org/latest/client-server-api/#post_matrixclientv3createroom
|
|
ratelimit: set to False to disable the rate limiter
|
|
|
|
creator_join_profile:
|
|
Set to override the displayname and avatar for the creating
|
|
user in this room. If unset, displayname and avatar will be
|
|
derived from the user's profile. If set, should contain the
|
|
values to go in the body of the 'join' event (typically
|
|
`avatar_url` and/or `displayname`.
|
|
|
|
Returns:
|
|
A 3-tuple containing:
|
|
- the room ID;
|
|
- if requested, the room alias, otherwise None; and
|
|
- the `stream_id` of the last persisted event.
|
|
Raises:
|
|
SynapseError:
|
|
if the room ID couldn't be stored, 3pid invitation config
|
|
validation failed, or something went horribly wrong.
|
|
ResourceLimitError:
|
|
if server is blocked to some resource being
|
|
exceeded
|
|
"""
|
|
user_id = requester.user.to_string()
|
|
|
|
await self.auth_blocking.check_auth_blocking(requester=requester)
|
|
|
|
if (
|
|
self._server_notices_mxid is not None
|
|
and user_id == self._server_notices_mxid
|
|
):
|
|
# allow the server notices mxid to create rooms
|
|
is_requester_admin = True
|
|
else:
|
|
is_requester_admin = await self.auth.is_server_admin(requester)
|
|
|
|
# Let the third party rules modify the room creation config if needed, or abort
|
|
# the room creation entirely with an exception.
|
|
await self._third_party_event_rules.on_create_room(
|
|
requester, config, is_requester_admin=is_requester_admin
|
|
)
|
|
|
|
invite_3pid_list = config.get("invite_3pid", [])
|
|
invite_list = config.get("invite", [])
|
|
|
|
# validate each entry for correctness
|
|
for invite_3pid in invite_3pid_list:
|
|
if not all(
|
|
key in invite_3pid
|
|
for key in ("medium", "address", "id_server", "id_access_token")
|
|
):
|
|
raise SynapseError(
|
|
HTTPStatus.BAD_REQUEST,
|
|
"all of `medium`, `address`, `id_server` and `id_access_token` "
|
|
"are required when making a 3pid invite",
|
|
Codes.MISSING_PARAM,
|
|
)
|
|
|
|
if not is_requester_admin:
|
|
spam_check = await self._spam_checker_module_callbacks.user_may_create_room(
|
|
user_id
|
|
)
|
|
if spam_check != self._spam_checker_module_callbacks.NOT_SPAM:
|
|
raise SynapseError(
|
|
403,
|
|
"You are not permitted to create rooms",
|
|
errcode=spam_check[0],
|
|
additional_fields=spam_check[1],
|
|
)
|
|
|
|
if ratelimit:
|
|
# Rate limit once in advance, but don't rate limit the individual
|
|
# events in the room — room creation isn't atomic and it's very
|
|
# janky if half the events in the initial state don't make it because
|
|
# of rate limiting.
|
|
await self.request_ratelimiter.ratelimit(requester)
|
|
|
|
room_version_id = config.get(
|
|
"room_version", self.config.server.default_room_version.identifier
|
|
)
|
|
|
|
if not isinstance(room_version_id, str):
|
|
raise SynapseError(400, "room_version must be a string", Codes.BAD_JSON)
|
|
|
|
room_version = KNOWN_ROOM_VERSIONS.get(room_version_id)
|
|
if room_version is None:
|
|
raise SynapseError(
|
|
400,
|
|
"Your homeserver does not support this room version",
|
|
Codes.UNSUPPORTED_ROOM_VERSION,
|
|
)
|
|
|
|
room_alias = None
|
|
if "room_alias_name" in config:
|
|
for wchar in string.whitespace:
|
|
if wchar in config["room_alias_name"]:
|
|
raise SynapseError(400, "Invalid characters in room alias")
|
|
|
|
if ":" in config["room_alias_name"]:
|
|
# Prevent someone from trying to pass in a full alias here.
|
|
# Note that it's permissible for a room alias to have multiple
|
|
# hash symbols at the start (notably bridged over from IRC, too),
|
|
# but the first colon in the alias is defined to separate the local
|
|
# part from the server name.
|
|
# (remember server names can contain port numbers, also separated
|
|
# by a colon. But under no circumstances should the local part be
|
|
# allowed to contain a colon!)
|
|
raise SynapseError(
|
|
400,
|
|
"':' is not permitted in the room alias name. "
|
|
"Please note this expects a local part — 'wombat', not '#wombat:example.com'.",
|
|
)
|
|
|
|
room_alias = RoomAlias(config["room_alias_name"], self.hs.hostname)
|
|
mapping = await self.store.get_association_from_room_alias(room_alias)
|
|
|
|
if mapping:
|
|
raise SynapseError(400, "Room alias already taken", Codes.ROOM_IN_USE)
|
|
|
|
for i in invite_list:
|
|
try:
|
|
uid = UserID.from_string(i)
|
|
parse_and_validate_server_name(uid.domain)
|
|
except Exception:
|
|
raise SynapseError(400, "Invalid user_id: %s" % (i,))
|
|
|
|
if (invite_list or invite_3pid_list) and requester.shadow_banned:
|
|
# We randomly sleep a bit just to annoy the requester.
|
|
await self.clock.sleep(random.randint(1, 10))
|
|
|
|
# Allow the request to go through, but remove any associated invites.
|
|
invite_3pid_list = []
|
|
invite_list = []
|
|
|
|
if invite_list or invite_3pid_list:
|
|
try:
|
|
# If there are invites in the request, see if the ratelimiting settings
|
|
# allow that number of invites to be sent from the current user.
|
|
await self.room_member_handler.ratelimit_multiple_invites(
|
|
requester,
|
|
room_id=None,
|
|
n_invites=len(invite_list) + len(invite_3pid_list),
|
|
update=False,
|
|
)
|
|
except LimitExceededError:
|
|
raise SynapseError(400, "Cannot invite so many users at once")
|
|
|
|
await self.event_creation_handler.assert_accepted_privacy_policy(requester)
|
|
|
|
power_level_content_override = config.get("power_level_content_override")
|
|
if (
|
|
power_level_content_override
|
|
and "users" in power_level_content_override
|
|
and user_id not in power_level_content_override["users"]
|
|
):
|
|
raise SynapseError(
|
|
400,
|
|
"Not a valid power_level_content_override: 'users' did not contain %s"
|
|
% (user_id,),
|
|
)
|
|
|
|
# The spec says rooms should default to private visibility if
|
|
# `visibility` is not specified.
|
|
visibility = config.get("visibility", "private")
|
|
is_public = visibility == "public"
|
|
|
|
self._validate_room_config(config, visibility)
|
|
|
|
room_id = await self._generate_and_create_room_id(
|
|
creator_id=user_id,
|
|
is_public=is_public,
|
|
room_version=room_version,
|
|
)
|
|
|
|
# Check whether this visibility value is blocked by a third party module
|
|
allowed_by_third_party_rules = (
|
|
await (
|
|
self._third_party_event_rules.check_visibility_can_be_modified(
|
|
room_id, visibility
|
|
)
|
|
)
|
|
)
|
|
if not allowed_by_third_party_rules:
|
|
raise SynapseError(403, "Room visibility value not allowed.")
|
|
|
|
if is_public:
|
|
room_aliases = []
|
|
if room_alias:
|
|
room_aliases.append(room_alias.to_string())
|
|
if not self.config.roomdirectory.is_publishing_room_allowed(
|
|
user_id, room_id, room_aliases
|
|
):
|
|
# Let's just return a generic message, as there may be all sorts of
|
|
# reasons why we said no. TODO: Allow configurable error messages
|
|
# per alias creation rule?
|
|
raise SynapseError(403, "Not allowed to publish room")
|
|
|
|
directory_handler = self.hs.get_directory_handler()
|
|
if room_alias:
|
|
await directory_handler.create_association(
|
|
requester=requester,
|
|
room_id=room_id,
|
|
room_alias=room_alias,
|
|
servers=[self.hs.hostname],
|
|
check_membership=False,
|
|
)
|
|
|
|
raw_initial_state = config.get("initial_state", [])
|
|
|
|
initial_state = OrderedDict()
|
|
for val in raw_initial_state:
|
|
initial_state[(val["type"], val.get("state_key", ""))] = val["content"]
|
|
|
|
creation_content = config.get("creation_content", {})
|
|
|
|
# override any attempt to set room versions via the creation_content
|
|
creation_content["room_version"] = room_version.identifier
|
|
|
|
(
|
|
last_stream_id,
|
|
last_sent_event_id,
|
|
depth,
|
|
) = await self._send_events_for_new_room(
|
|
requester,
|
|
room_id,
|
|
room_version,
|
|
room_config=config,
|
|
invite_list=invite_list,
|
|
initial_state=initial_state,
|
|
creation_content=creation_content,
|
|
room_alias=room_alias,
|
|
power_level_content_override=power_level_content_override,
|
|
creator_join_profile=creator_join_profile,
|
|
)
|
|
|
|
# we avoid dropping the lock between invites, as otherwise joins can
|
|
# start coming in and making the createRoom slow.
|
|
#
|
|
# we also don't need to check the requester's shadow-ban here, as we
|
|
# have already done so above (and potentially emptied invite_list).
|
|
async with self.room_member_handler.member_linearizer.queue((room_id,)):
|
|
content = {}
|
|
is_direct = config.get("is_direct", None)
|
|
if is_direct:
|
|
content["is_direct"] = is_direct
|
|
|
|
for invitee in invite_list:
|
|
(
|
|
member_event_id,
|
|
last_stream_id,
|
|
) = await self.room_member_handler.update_membership_locked(
|
|
requester,
|
|
UserID.from_string(invitee),
|
|
room_id,
|
|
"invite",
|
|
ratelimit=False,
|
|
content=content,
|
|
new_room=True,
|
|
prev_event_ids=[last_sent_event_id],
|
|
depth=depth,
|
|
)
|
|
last_sent_event_id = member_event_id
|
|
depth += 1
|
|
|
|
for invite_3pid in invite_3pid_list:
|
|
id_server = invite_3pid["id_server"]
|
|
id_access_token = invite_3pid["id_access_token"]
|
|
address = invite_3pid["address"]
|
|
medium = invite_3pid["medium"]
|
|
# Note that do_3pid_invite can raise a ShadowBanError, but this was
|
|
# handled above by emptying invite_3pid_list.
|
|
(
|
|
member_event_id,
|
|
last_stream_id,
|
|
) = await self.hs.get_room_member_handler().do_3pid_invite(
|
|
room_id,
|
|
requester.user,
|
|
medium,
|
|
address,
|
|
id_server,
|
|
requester,
|
|
txn_id=None,
|
|
id_access_token=id_access_token,
|
|
prev_event_ids=[last_sent_event_id],
|
|
depth=depth,
|
|
)
|
|
last_sent_event_id = member_event_id
|
|
depth += 1
|
|
|
|
# Always wait for room creation to propagate before returning
|
|
await self._replication.wait_for_stream_position(
|
|
self.hs.config.worker.events_shard_config.get_instance(room_id),
|
|
"events",
|
|
last_stream_id,
|
|
)
|
|
|
|
return room_id, room_alias, last_stream_id
|
|
|
|
async def _send_events_for_new_room(
|
|
self,
|
|
creator: Requester,
|
|
room_id: str,
|
|
room_version: RoomVersion,
|
|
room_config: JsonDict,
|
|
invite_list: List[str],
|
|
initial_state: MutableStateMap,
|
|
creation_content: JsonDict,
|
|
room_alias: Optional[RoomAlias] = None,
|
|
power_level_content_override: Optional[JsonDict] = None,
|
|
creator_join_profile: Optional[JsonDict] = None,
|
|
) -> Tuple[int, str, int]:
|
|
"""Sends the initial events into a new room. Sends the room creation, membership,
|
|
and power level events into the room sequentially, then creates and batches up the
|
|
rest of the events to persist as a batch to the DB.
|
|
|
|
`power_level_content_override` doesn't apply when initial state has
|
|
power level state event content.
|
|
|
|
Rate limiting should already have been applied by this point.
|
|
|
|
Args:
|
|
creator:
|
|
the user requesting the room creation
|
|
room_id:
|
|
room id for the room being created
|
|
room_version:
|
|
The room version of the new room.
|
|
room_config:
|
|
A dict of configuration options. This will be the body of
|
|
a /createRoom request; see
|
|
https://spec.matrix.org/latest/client-server-api/#post_matrixclientv3createroom
|
|
invite_list:
|
|
a list of user ids to invite to the room
|
|
initial_state:
|
|
A list of state events to set in the new room.
|
|
creation_content:
|
|
Extra keys, such as m.federate, to be added to the content of the m.room.create event.
|
|
room_alias:
|
|
alias for the room
|
|
power_level_content_override:
|
|
The power level content to override in the default power level event.
|
|
creator_join_profile:
|
|
Set to override the displayname and avatar for the creating
|
|
user in this room.
|
|
|
|
Returns:
|
|
A tuple containing the stream ID, event ID and depth of the last
|
|
event sent to the room.
|
|
"""
|
|
creator_id = creator.user.to_string()
|
|
event_keys = {"room_id": room_id, "sender": creator_id, "state_key": ""}
|
|
depth = 1
|
|
|
|
# the most recently created event
|
|
prev_event: List[str] = []
|
|
# a map of event types, state keys -> event_ids. We collect these mappings this as events are
|
|
# created (but not persisted to the db) to determine state for future created events
|
|
# (as this info can't be pulled from the db)
|
|
state_map: MutableStateMap[str] = {}
|
|
|
|
async def create_event(
|
|
etype: str,
|
|
content: JsonDict,
|
|
for_batch: bool,
|
|
**kwargs: Any,
|
|
) -> Tuple[EventBase, synapse.events.snapshot.UnpersistedEventContextBase]:
|
|
"""
|
|
Creates an event and associated event context.
|
|
Args:
|
|
etype: the type of event to be created
|
|
content: content of the event
|
|
for_batch: whether the event is being created for batch persisting. If
|
|
bool for_batch is true, this will create an event using the prev_event_ids,
|
|
and will create an event context for the event using the parameters state_map
|
|
and current_state_group, thus these parameters must be provided in this
|
|
case if for_batch is True. The subsequently created event and context
|
|
are suitable for being batched up and bulk persisted to the database
|
|
with other similarly created events.
|
|
"""
|
|
nonlocal depth
|
|
nonlocal prev_event
|
|
|
|
# Create the event dictionary.
|
|
event_dict = {"type": etype, "content": content}
|
|
event_dict.update(event_keys)
|
|
event_dict.update(kwargs)
|
|
|
|
(
|
|
new_event,
|
|
new_unpersisted_context,
|
|
) = await self.event_creation_handler.create_event(
|
|
creator,
|
|
event_dict,
|
|
prev_event_ids=prev_event,
|
|
depth=depth,
|
|
# Take a copy to ensure each event gets a unique copy of
|
|
# state_map since it is modified below.
|
|
state_map=dict(state_map),
|
|
for_batch=for_batch,
|
|
)
|
|
|
|
depth += 1
|
|
prev_event = [new_event.event_id]
|
|
state_map[(new_event.type, new_event.state_key)] = new_event.event_id
|
|
|
|
return new_event, new_unpersisted_context
|
|
|
|
preset_config, config = self._room_preset_config(room_config)
|
|
|
|
# MSC2175 removes the creator field from the create event.
|
|
if not room_version.implicit_room_creator:
|
|
creation_content["creator"] = creator_id
|
|
creation_event, unpersisted_creation_context = await create_event(
|
|
EventTypes.Create, creation_content, False
|
|
)
|
|
creation_context = await unpersisted_creation_context.persist(creation_event)
|
|
logger.debug("Sending %s in new room", EventTypes.Member)
|
|
ev = await self.event_creation_handler.handle_new_client_event(
|
|
requester=creator,
|
|
events_and_context=[(creation_event, creation_context)],
|
|
ratelimit=False,
|
|
ignore_shadow_ban=True,
|
|
)
|
|
last_sent_event_id = ev.event_id
|
|
|
|
member_event_id, _ = await self.room_member_handler.update_membership(
|
|
creator,
|
|
creator.user,
|
|
room_id,
|
|
"join",
|
|
ratelimit=False,
|
|
content=creator_join_profile,
|
|
new_room=True,
|
|
prev_event_ids=[last_sent_event_id],
|
|
depth=depth,
|
|
)
|
|
prev_event = [member_event_id]
|
|
|
|
# update the depth and state map here as the membership event has been created
|
|
# through a different code path
|
|
depth += 1
|
|
state_map[(EventTypes.Member, creator.user.to_string())] = member_event_id
|
|
|
|
# we need the state group of the membership event as it is the current state group
|
|
event_to_state = (
|
|
await self._storage_controllers.state.get_state_group_for_events(
|
|
[member_event_id]
|
|
)
|
|
)
|
|
current_state_group = event_to_state[member_event_id]
|
|
|
|
events_to_send = []
|
|
# We treat the power levels override specially as this needs to be one
|
|
# of the first events that get sent into a room.
|
|
pl_content = initial_state.pop((EventTypes.PowerLevels, ""), None)
|
|
if pl_content is not None:
|
|
power_event, power_context = await create_event(
|
|
EventTypes.PowerLevels, pl_content, True
|
|
)
|
|
events_to_send.append((power_event, power_context))
|
|
else:
|
|
power_level_content: JsonDict = {
|
|
"users": {creator_id: 100},
|
|
"users_default": 0,
|
|
"events": {
|
|
EventTypes.Name: 50,
|
|
EventTypes.PowerLevels: 100,
|
|
EventTypes.RoomHistoryVisibility: 100,
|
|
EventTypes.CanonicalAlias: 50,
|
|
EventTypes.RoomAvatar: 50,
|
|
EventTypes.Tombstone: 100,
|
|
EventTypes.ServerACL: 100,
|
|
EventTypes.RoomEncryption: 100,
|
|
},
|
|
"events_default": 0,
|
|
"state_default": 50,
|
|
"ban": 50,
|
|
"kick": 50,
|
|
"redact": 50,
|
|
"invite": 50,
|
|
"historical": 100,
|
|
}
|
|
|
|
if config["original_invitees_have_ops"]:
|
|
for invitee in invite_list:
|
|
power_level_content["users"][invitee] = 100
|
|
|
|
# If the user supplied a preset name e.g. "private_chat",
|
|
# we apply that preset
|
|
power_level_content.update(config["power_level_content_override"])
|
|
|
|
# If the server config contains default_power_level_content_override,
|
|
# and that contains information for this room preset, apply it.
|
|
if self._default_power_level_content_override:
|
|
override = self._default_power_level_content_override.get(preset_config)
|
|
if override is not None:
|
|
power_level_content.update(override)
|
|
|
|
# Finally, if the user supplied specific permissions for this room,
|
|
# apply those.
|
|
if power_level_content_override:
|
|
power_level_content.update(power_level_content_override)
|
|
pl_event, pl_context = await create_event(
|
|
EventTypes.PowerLevels,
|
|
power_level_content,
|
|
True,
|
|
)
|
|
events_to_send.append((pl_event, pl_context))
|
|
|
|
if room_alias and (EventTypes.CanonicalAlias, "") not in initial_state:
|
|
room_alias_event, room_alias_context = await create_event(
|
|
EventTypes.CanonicalAlias, {"alias": room_alias.to_string()}, True
|
|
)
|
|
events_to_send.append((room_alias_event, room_alias_context))
|
|
|
|
if (EventTypes.JoinRules, "") not in initial_state:
|
|
join_rules_event, join_rules_context = await create_event(
|
|
EventTypes.JoinRules,
|
|
{"join_rule": config["join_rules"]},
|
|
True,
|
|
)
|
|
events_to_send.append((join_rules_event, join_rules_context))
|
|
|
|
if (EventTypes.RoomHistoryVisibility, "") not in initial_state:
|
|
visibility_event, visibility_context = await create_event(
|
|
EventTypes.RoomHistoryVisibility,
|
|
{"history_visibility": config["history_visibility"]},
|
|
True,
|
|
)
|
|
events_to_send.append((visibility_event, visibility_context))
|
|
|
|
if config["guest_can_join"]:
|
|
if (EventTypes.GuestAccess, "") not in initial_state:
|
|
guest_access_event, guest_access_context = await create_event(
|
|
EventTypes.GuestAccess,
|
|
{EventContentFields.GUEST_ACCESS: GuestAccess.CAN_JOIN},
|
|
True,
|
|
)
|
|
events_to_send.append((guest_access_event, guest_access_context))
|
|
|
|
for (etype, state_key), content in initial_state.items():
|
|
event, context = await create_event(
|
|
etype, content, True, state_key=state_key
|
|
)
|
|
events_to_send.append((event, context))
|
|
|
|
if config["encrypted"]:
|
|
encryption_event, encryption_context = await create_event(
|
|
EventTypes.RoomEncryption,
|
|
{"algorithm": RoomEncryptionAlgorithms.DEFAULT},
|
|
True,
|
|
state_key="",
|
|
)
|
|
events_to_send.append((encryption_event, encryption_context))
|
|
|
|
if "name" in room_config:
|
|
name = room_config["name"]
|
|
name_event, name_context = await create_event(
|
|
EventTypes.Name,
|
|
{"name": name},
|
|
True,
|
|
)
|
|
events_to_send.append((name_event, name_context))
|
|
|
|
if "topic" in room_config:
|
|
topic = room_config["topic"]
|
|
topic_event, topic_context = await create_event(
|
|
EventTypes.Topic,
|
|
{"topic": topic},
|
|
True,
|
|
)
|
|
events_to_send.append((topic_event, topic_context))
|
|
|
|
datastore = self.hs.get_datastores().state
|
|
events_and_context = (
|
|
await UnpersistedEventContext.batch_persist_unpersisted_contexts(
|
|
events_to_send, room_id, current_state_group, datastore
|
|
)
|
|
)
|
|
|
|
last_event = await self.event_creation_handler.handle_new_client_event(
|
|
creator,
|
|
events_and_context,
|
|
ignore_shadow_ban=True,
|
|
ratelimit=False,
|
|
)
|
|
assert last_event.internal_metadata.stream_ordering is not None
|
|
return last_event.internal_metadata.stream_ordering, last_event.event_id, depth
|
|
|
|
def _validate_room_config(
|
|
self,
|
|
config: JsonDict,
|
|
visibility: str,
|
|
) -> None:
|
|
"""Checks configuration parameters for a /createRoom request.
|
|
|
|
If validation detects invalid parameters an exception may be raised to
|
|
cause room creation to be aborted and an error response to be returned
|
|
to the client.
|
|
|
|
Args:
|
|
config: A dict of configuration options. Originally from the body of
|
|
the /createRoom request
|
|
visibility: One of "public" or "private"
|
|
"""
|
|
|
|
# Validate the requested preset, raise a 400 error if not valid
|
|
preset_name, preset_config = self._room_preset_config(config)
|
|
|
|
# If the user is trying to create an encrypted room and this is forbidden
|
|
# by the configured default_power_level_content_override, then reject the
|
|
# request before the room is created.
|
|
raw_initial_state = config.get("initial_state", [])
|
|
room_encryption_event = any(
|
|
s.get("type", "") == EventTypes.RoomEncryption for s in raw_initial_state
|
|
)
|
|
|
|
if preset_config["encrypted"] or room_encryption_event:
|
|
if self._default_power_level_content_override:
|
|
override = self._default_power_level_content_override.get(preset_name)
|
|
if override is not None:
|
|
event_levels = override.get("events", {})
|
|
room_admin_level = event_levels.get(EventTypes.PowerLevels, 100)
|
|
encryption_level = event_levels.get(EventTypes.RoomEncryption, 100)
|
|
if encryption_level > room_admin_level:
|
|
raise SynapseError(
|
|
403,
|
|
f"You cannot create an encrypted room. user_level ({room_admin_level}) < send_level ({encryption_level})",
|
|
)
|
|
|
|
def _room_preset_config(self, room_config: JsonDict) -> Tuple[str, dict]:
|
|
# The spec says rooms should default to private visibility if
|
|
# `visibility` is not specified.
|
|
visibility = room_config.get("visibility", "private")
|
|
preset_name = room_config.get(
|
|
"preset",
|
|
RoomCreationPreset.PRIVATE_CHAT
|
|
if visibility == "private"
|
|
else RoomCreationPreset.PUBLIC_CHAT,
|
|
)
|
|
try:
|
|
preset_config = self._presets_dict[preset_name]
|
|
except KeyError:
|
|
raise SynapseError(
|
|
400, f"'{preset_name}' is not a valid preset", errcode=Codes.BAD_JSON
|
|
)
|
|
return preset_name, preset_config
|
|
|
|
def _generate_room_id(self) -> str:
|
|
"""Generates a random room ID.
|
|
|
|
Room IDs look like "!opaque_id:domain" and are case-sensitive as per the spec
|
|
at https://spec.matrix.org/v1.2/appendices/#room-ids-and-event-ids.
|
|
|
|
Does not check for collisions with existing rooms or prevent future calls from
|
|
returning the same room ID. To ensure the uniqueness of a new room ID, use
|
|
`_generate_and_create_room_id` instead.
|
|
|
|
Synapse's room IDs are 18 [a-zA-Z] characters long, which comes out to around
|
|
102 bits.
|
|
|
|
Returns:
|
|
A random room ID of the form "!opaque_id:domain".
|
|
"""
|
|
random_string = stringutils.random_string(18)
|
|
return RoomID(random_string, self.hs.hostname).to_string()
|
|
|
|
async def _generate_and_create_room_id(
|
|
self,
|
|
creator_id: str,
|
|
is_public: bool,
|
|
room_version: RoomVersion,
|
|
) -> str:
|
|
# autogen room IDs and try to create it. We may clash, so just
|
|
# try a few times till one goes through, giving up eventually.
|
|
attempts = 0
|
|
while attempts < 5:
|
|
try:
|
|
gen_room_id = self._generate_room_id()
|
|
await self.store.store_room(
|
|
room_id=gen_room_id,
|
|
room_creator_user_id=creator_id,
|
|
is_public=is_public,
|
|
room_version=room_version,
|
|
)
|
|
return gen_room_id
|
|
except StoreError:
|
|
attempts += 1
|
|
raise StoreError(500, "Couldn't generate a room ID.")
|
|
|
|
|
|
class RoomContextHandler:
|
|
def __init__(self, hs: "HomeServer"):
|
|
self.hs = hs
|
|
self.auth = hs.get_auth()
|
|
self.store = hs.get_datastores().main
|
|
self._storage_controllers = hs.get_storage_controllers()
|
|
self._state_storage_controller = self._storage_controllers.state
|
|
self._relations_handler = hs.get_relations_handler()
|
|
|
|
async def get_event_context(
|
|
self,
|
|
requester: Requester,
|
|
room_id: str,
|
|
event_id: str,
|
|
limit: int,
|
|
event_filter: Optional[Filter],
|
|
use_admin_priviledge: bool = False,
|
|
) -> Optional[EventContext]:
|
|
"""Retrieves events, pagination tokens and state around a given event
|
|
in a room.
|
|
|
|
Args:
|
|
requester
|
|
room_id
|
|
event_id
|
|
limit: The maximum number of events to return in total
|
|
(excluding state).
|
|
event_filter: the filter to apply to the events returned
|
|
(excluding the target event_id)
|
|
use_admin_priviledge: if `True`, return all events, regardless
|
|
of whether `user` has access to them. To be used **ONLY**
|
|
from the admin API.
|
|
Returns:
|
|
dict, or None if the event isn't found
|
|
"""
|
|
user = requester.user
|
|
if use_admin_priviledge:
|
|
await assert_user_is_admin(self.auth, requester)
|
|
|
|
before_limit = math.floor(limit / 2.0)
|
|
after_limit = limit - before_limit
|
|
|
|
is_user_in_room = await self.store.check_local_user_in_room(
|
|
user_id=user.to_string(), room_id=room_id
|
|
)
|
|
# The user is peeking if they aren't in the room already
|
|
is_peeking = not is_user_in_room
|
|
|
|
async def filter_evts(events: List[EventBase]) -> List[EventBase]:
|
|
if use_admin_priviledge:
|
|
return events
|
|
return await filter_events_for_client(
|
|
self._storage_controllers,
|
|
user.to_string(),
|
|
events,
|
|
is_peeking=is_peeking,
|
|
)
|
|
|
|
event = await self.store.get_event(
|
|
event_id, get_prev_content=True, allow_none=True
|
|
)
|
|
if not event:
|
|
return None
|
|
|
|
filtered = await filter_evts([event])
|
|
if not filtered:
|
|
raise AuthError(403, "You don't have permission to access that event.")
|
|
|
|
results = await self.store.get_events_around(
|
|
room_id, event_id, before_limit, after_limit, event_filter
|
|
)
|
|
events_before = results.events_before
|
|
events_after = results.events_after
|
|
|
|
if event_filter:
|
|
events_before = await event_filter.filter(events_before)
|
|
events_after = await event_filter.filter(events_after)
|
|
|
|
events_before = await filter_evts(events_before)
|
|
events_after = await filter_evts(events_after)
|
|
# filter_evts can return a pruned event in case the user is allowed to see that
|
|
# there's something there but not see the content, so use the event that's in
|
|
# `filtered` rather than the event we retrieved from the datastore.
|
|
event = filtered[0]
|
|
|
|
# Fetch the aggregations.
|
|
aggregations = await self._relations_handler.get_bundled_aggregations(
|
|
itertools.chain(events_before, (event,), events_after),
|
|
user.to_string(),
|
|
)
|
|
|
|
if events_after:
|
|
last_event_id = events_after[-1].event_id
|
|
else:
|
|
last_event_id = event_id
|
|
|
|
if event_filter and event_filter.lazy_load_members:
|
|
state_filter = StateFilter.from_lazy_load_member_list(
|
|
ev.sender
|
|
for ev in itertools.chain(
|
|
events_before,
|
|
(event,),
|
|
events_after,
|
|
)
|
|
)
|
|
else:
|
|
state_filter = StateFilter.all()
|
|
|
|
# XXX: why do we return the state as of the last event rather than the
|
|
# first? Shouldn't we be consistent with /sync?
|
|
# https://github.com/matrix-org/matrix-doc/issues/687
|
|
|
|
state = await self._state_storage_controller.get_state_for_events(
|
|
[last_event_id], state_filter=state_filter
|
|
)
|
|
|
|
state_events = list(state[last_event_id].values())
|
|
if event_filter:
|
|
state_events = await event_filter.filter(state_events)
|
|
|
|
# We use a dummy token here as we only care about the room portion of
|
|
# the token, which we replace.
|
|
token = StreamToken.START
|
|
|
|
return EventContext(
|
|
events_before=events_before,
|
|
event=event,
|
|
events_after=events_after,
|
|
state=state_events,
|
|
aggregations=aggregations,
|
|
start=await token.copy_and_replace(
|
|
StreamKeyType.ROOM, results.start
|
|
).to_string(self.store),
|
|
end=await token.copy_and_replace(StreamKeyType.ROOM, results.end).to_string(
|
|
self.store
|
|
),
|
|
)
|
|
|
|
|
|
class TimestampLookupHandler:
|
|
def __init__(self, hs: "HomeServer"):
|
|
self.store = hs.get_datastores().main
|
|
self.state_handler = hs.get_state_handler()
|
|
self.federation_client = hs.get_federation_client()
|
|
self.federation_event_handler = hs.get_federation_event_handler()
|
|
self._storage_controllers = hs.get_storage_controllers()
|
|
|
|
async def get_event_for_timestamp(
|
|
self,
|
|
requester: Requester,
|
|
room_id: str,
|
|
timestamp: int,
|
|
direction: Direction,
|
|
) -> Tuple[str, int]:
|
|
"""Find the closest event to the given timestamp in the given direction.
|
|
If we can't find an event locally or the event we have locally is next to a gap,
|
|
it will ask other federated homeservers for an event.
|
|
|
|
Args:
|
|
requester: The user making the request according to the access token
|
|
room_id: Room to fetch the event from
|
|
timestamp: The point in time (inclusive) we should navigate from in
|
|
the given direction to find the closest event.
|
|
direction: indicates whether we should navigate forward
|
|
or backward from the given timestamp to find the closest event.
|
|
|
|
Returns:
|
|
A tuple containing the `event_id` closest to the given timestamp in
|
|
the given direction and the `origin_server_ts`.
|
|
|
|
Raises:
|
|
SynapseError if unable to find any event locally in the given direction
|
|
"""
|
|
logger.debug(
|
|
"get_event_for_timestamp(room_id=%s, timestamp=%s, direction=%s) Finding closest event...",
|
|
room_id,
|
|
timestamp,
|
|
direction,
|
|
)
|
|
local_event_id = await self.store.get_event_id_for_timestamp(
|
|
room_id, timestamp, direction
|
|
)
|
|
logger.debug(
|
|
"get_event_for_timestamp: locally, we found event_id=%s closest to timestamp=%s",
|
|
local_event_id,
|
|
timestamp,
|
|
)
|
|
|
|
# Check for gaps in the history where events could be hiding in between
|
|
# the timestamp given and the event we were able to find locally
|
|
is_event_next_to_backward_gap = False
|
|
is_event_next_to_forward_gap = False
|
|
local_event = None
|
|
if local_event_id:
|
|
local_event = await self.store.get_event(
|
|
local_event_id, allow_none=False, allow_rejected=False
|
|
)
|
|
|
|
if direction == Direction.FORWARDS:
|
|
# We only need to check for a backward gap if we're looking forwards
|
|
# to ensure there is nothing in between.
|
|
is_event_next_to_backward_gap = (
|
|
await self.store.is_event_next_to_backward_gap(local_event)
|
|
)
|
|
elif direction == Direction.BACKWARDS:
|
|
# We only need to check for a forward gap if we're looking backwards
|
|
# to ensure there is nothing in between
|
|
is_event_next_to_forward_gap = (
|
|
await self.store.is_event_next_to_forward_gap(local_event)
|
|
)
|
|
|
|
# If we found a gap, we should probably ask another homeserver first
|
|
# about more history in between
|
|
if (
|
|
not local_event_id
|
|
or is_event_next_to_backward_gap
|
|
or is_event_next_to_forward_gap
|
|
):
|
|
logger.debug(
|
|
"get_event_for_timestamp: locally, we found event_id=%s closest to timestamp=%s which is next to a gap in event history so we're asking other homeservers first",
|
|
local_event_id,
|
|
timestamp,
|
|
)
|
|
|
|
likely_domains = (
|
|
await self._storage_controllers.state.get_current_hosts_in_room_ordered(
|
|
room_id
|
|
)
|
|
)
|
|
|
|
remote_response = await self.federation_client.timestamp_to_event(
|
|
destinations=likely_domains,
|
|
room_id=room_id,
|
|
timestamp=timestamp,
|
|
direction=direction,
|
|
)
|
|
if remote_response is not None:
|
|
logger.debug(
|
|
"get_event_for_timestamp: remote_response=%s",
|
|
remote_response,
|
|
)
|
|
|
|
remote_event_id = remote_response.event_id
|
|
remote_origin_server_ts = remote_response.origin_server_ts
|
|
|
|
# Backfill this event so we can get a pagination token for
|
|
# it with `/context` and paginate `/messages` from this
|
|
# point.
|
|
pulled_pdu_info = await self.federation_event_handler.backfill_event_id(
|
|
likely_domains, room_id, remote_event_id
|
|
)
|
|
remote_event = pulled_pdu_info.pdu
|
|
|
|
# XXX: When we see that the remote server is not trustworthy,
|
|
# maybe we should not ask them first in the future.
|
|
if remote_origin_server_ts != remote_event.origin_server_ts:
|
|
logger.info(
|
|
"get_event_for_timestamp: Remote server (%s) claimed that remote_event_id=%s occured at remote_origin_server_ts=%s but that isn't true (actually occured at %s). Their claims are dubious and we should consider not trusting them.",
|
|
pulled_pdu_info.pull_origin,
|
|
remote_event_id,
|
|
remote_origin_server_ts,
|
|
remote_event.origin_server_ts,
|
|
)
|
|
|
|
# Only return the remote event if it's closer than the local event
|
|
if not local_event or (
|
|
abs(remote_event.origin_server_ts - timestamp)
|
|
< abs(local_event.origin_server_ts - timestamp)
|
|
):
|
|
logger.info(
|
|
"get_event_for_timestamp: returning remote_event_id=%s (%s) since it's closer to timestamp=%s than local_event=%s (%s)",
|
|
remote_event_id,
|
|
remote_event.origin_server_ts,
|
|
timestamp,
|
|
local_event.event_id if local_event else None,
|
|
local_event.origin_server_ts if local_event else None,
|
|
)
|
|
return remote_event_id, remote_origin_server_ts
|
|
|
|
# To appease mypy, we have to add both of these conditions to check for
|
|
# `None`. We only expect `local_event` to be `None` when
|
|
# `local_event_id` is `None` but mypy isn't as smart and assuming as us.
|
|
if not local_event_id or not local_event:
|
|
raise SynapseError(
|
|
404,
|
|
"Unable to find event from %s in direction %s" % (timestamp, direction),
|
|
errcode=Codes.NOT_FOUND,
|
|
)
|
|
|
|
return local_event_id, local_event.origin_server_ts
|
|
|
|
|
|
class RoomEventSource(EventSource[RoomStreamToken, EventBase]):
|
|
def __init__(self, hs: "HomeServer"):
|
|
self.store = hs.get_datastores().main
|
|
|
|
async def get_new_events(
|
|
self,
|
|
user: UserID,
|
|
from_key: RoomStreamToken,
|
|
limit: int,
|
|
room_ids: StrCollection,
|
|
is_guest: bool,
|
|
explicit_room_id: Optional[str] = None,
|
|
) -> Tuple[List[EventBase], RoomStreamToken]:
|
|
# We just ignore the key for now.
|
|
|
|
to_key = self.get_current_key()
|
|
|
|
if from_key.topological:
|
|
logger.warning("Stream has topological part!!!! %r", from_key)
|
|
from_key = RoomStreamToken(stream=from_key.stream)
|
|
|
|
app_service = self.store.get_app_service_by_user_id(user.to_string())
|
|
if app_service:
|
|
# We no longer support AS users using /sync directly.
|
|
# See https://github.com/matrix-org/matrix-doc/issues/1144
|
|
raise NotImplementedError()
|
|
else:
|
|
room_events = await self.store.get_membership_changes_for_user(
|
|
user.to_string(), from_key, to_key
|
|
)
|
|
|
|
room_to_events = await 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
|
|
|
|
return events, end_key
|
|
|
|
def get_current_key(self) -> RoomStreamToken:
|
|
return self.store.get_room_max_token()
|
|
|
|
def get_current_key_for_room(self, room_id: str) -> Awaitable[RoomStreamToken]:
|
|
return self.store.get_current_room_stream_token_for_room_id(room_id)
|
|
|
|
|
|
class ShutdownRoomParams(TypedDict):
|
|
"""
|
|
Attributes:
|
|
requester_user_id:
|
|
User who requested the action. Will be recorded as putting the room on the
|
|
blocking list.
|
|
new_room_user_id:
|
|
If set, a new room will be created with this user ID
|
|
as the creator and admin, and all users in the old room will be
|
|
moved into that room. If not set, no new room will be created
|
|
and the users will just be removed from the old room.
|
|
new_room_name:
|
|
A string representing the name of the room that new users will
|
|
be invited to. Defaults to `Content Violation Notification`
|
|
message:
|
|
A string containing the first message that will be sent as
|
|
`new_room_user_id` in the new room. Ideally this will clearly
|
|
convey why the original room was shut down.
|
|
Defaults to `Sharing illegal content on this server is not
|
|
permitted and rooms in violation will be blocked.`
|
|
block:
|
|
If set to `true`, this room will be added to a blocking list,
|
|
preventing future attempts to join the room. Defaults to `false`.
|
|
purge:
|
|
If set to `true`, purge the given room from the database.
|
|
force_purge:
|
|
If set to `true`, the room will be purged from database
|
|
even if there are still users joined to the room.
|
|
"""
|
|
|
|
requester_user_id: Optional[str]
|
|
new_room_user_id: Optional[str]
|
|
new_room_name: Optional[str]
|
|
message: Optional[str]
|
|
block: bool
|
|
purge: bool
|
|
force_purge: bool
|
|
|
|
|
|
class ShutdownRoomResponse(TypedDict):
|
|
"""
|
|
Attributes:
|
|
kicked_users: An array of users (`user_id`) that were kicked.
|
|
failed_to_kick_users:
|
|
An array of users (`user_id`) that that were not kicked.
|
|
local_aliases:
|
|
An array of strings representing the local aliases that were
|
|
migrated from the old room to the new.
|
|
new_room_id: A string representing the room ID of the new room.
|
|
"""
|
|
|
|
kicked_users: List[str]
|
|
failed_to_kick_users: List[str]
|
|
local_aliases: List[str]
|
|
new_room_id: Optional[str]
|
|
|
|
|
|
class RoomShutdownHandler:
|
|
DEFAULT_MESSAGE = (
|
|
"Sharing illegal content on this server is not permitted and rooms in"
|
|
" violation will be blocked."
|
|
)
|
|
DEFAULT_ROOM_NAME = "Content Violation Notification"
|
|
|
|
def __init__(self, hs: "HomeServer"):
|
|
self.hs = hs
|
|
self.room_member_handler = hs.get_room_member_handler()
|
|
self._room_creation_handler = hs.get_room_creation_handler()
|
|
self._replication = hs.get_replication_data_handler()
|
|
self._third_party_rules = hs.get_module_api_callbacks().third_party_event_rules
|
|
self.event_creation_handler = hs.get_event_creation_handler()
|
|
self.store = hs.get_datastores().main
|
|
|
|
async def shutdown_room(
|
|
self,
|
|
room_id: str,
|
|
params: ShutdownRoomParams,
|
|
result: Optional[ShutdownRoomResponse] = None,
|
|
update_result_fct: Optional[
|
|
Callable[[Optional[JsonMapping]], Awaitable[None]]
|
|
] = None,
|
|
) -> Optional[ShutdownRoomResponse]:
|
|
"""
|
|
Shuts down a room. Moves all local users and room aliases automatically
|
|
to a new room if `new_room_user_id` is set. Otherwise local users only
|
|
leave the room without any information.
|
|
|
|
The new room will be created with the user specified by the
|
|
`new_room_user_id` parameter as room administrator and will contain a
|
|
message explaining what happened. Users invited to the new room will
|
|
have power level `-10` by default, and thus be unable to speak.
|
|
|
|
The local server will only have the power to move local user and room
|
|
aliases to the new room. Users on other servers will be unaffected.
|
|
|
|
Args:
|
|
room_id: The ID of the room to shut down.
|
|
delete_id: The delete ID identifying this delete request
|
|
params: parameters for the shutdown, cf `ShutdownRoomParams`
|
|
result: current status of the shutdown, if it was interrupted
|
|
update_result_fct: function called when `result` is updated locally
|
|
|
|
Returns: a dict matching `ShutdownRoomResponse`.
|
|
"""
|
|
requester_user_id = params["requester_user_id"]
|
|
new_room_user_id = params["new_room_user_id"]
|
|
block = params["block"]
|
|
|
|
new_room_name = (
|
|
params["new_room_name"]
|
|
if params["new_room_name"]
|
|
else self.DEFAULT_ROOM_NAME
|
|
)
|
|
message = params["message"] if params["message"] else self.DEFAULT_MESSAGE
|
|
|
|
if not RoomID.is_valid(room_id):
|
|
raise SynapseError(400, "%s is not a legal room ID" % (room_id,))
|
|
|
|
if not await self._third_party_rules.check_can_shutdown_room(
|
|
requester_user_id, room_id
|
|
):
|
|
raise SynapseError(
|
|
403, "Shutdown of this room is forbidden", Codes.FORBIDDEN
|
|
)
|
|
|
|
result = (
|
|
result
|
|
if result
|
|
else {
|
|
"kicked_users": [],
|
|
"failed_to_kick_users": [],
|
|
"local_aliases": [],
|
|
"new_room_id": None,
|
|
}
|
|
)
|
|
|
|
# Action the block first (even if the room doesn't exist yet)
|
|
if block:
|
|
if requester_user_id is None:
|
|
raise ValueError(
|
|
"shutdown_room: block=True not allowed when requester_user_id is None."
|
|
)
|
|
# This will work even if the room is already blocked, but that is
|
|
# desirable in case the first attempt at blocking the room failed below.
|
|
await self.store.block_room(room_id, requester_user_id)
|
|
|
|
if not await self.store.get_room(room_id):
|
|
# if we don't know about the room, there is nothing left to do.
|
|
return result
|
|
|
|
new_room_id = result.get("new_room_id")
|
|
if new_room_user_id is not None and new_room_id is None:
|
|
if not self.hs.is_mine_id(new_room_user_id):
|
|
raise SynapseError(
|
|
400, "User must be our own: %s" % (new_room_user_id,)
|
|
)
|
|
|
|
room_creator_requester = create_requester(
|
|
new_room_user_id, authenticated_entity=requester_user_id
|
|
)
|
|
|
|
new_room_id, _, stream_id = await self._room_creation_handler.create_room(
|
|
room_creator_requester,
|
|
config={
|
|
"preset": RoomCreationPreset.PUBLIC_CHAT,
|
|
"name": new_room_name,
|
|
"power_level_content_override": {"users_default": -10},
|
|
},
|
|
ratelimit=False,
|
|
)
|
|
|
|
result["new_room_id"] = new_room_id
|
|
if update_result_fct:
|
|
await update_result_fct(result)
|
|
|
|
logger.info(
|
|
"Shutting down room %r, joining to new room: %r", room_id, new_room_id
|
|
)
|
|
|
|
# We now wait for the create room to come back in via replication so
|
|
# that we can assume that all the joins/invites have propagated before
|
|
# we try and auto join below.
|
|
await self._replication.wait_for_stream_position(
|
|
self.hs.config.worker.events_shard_config.get_instance(new_room_id),
|
|
"events",
|
|
stream_id,
|
|
)
|
|
else:
|
|
logger.info("Shutting down room %r", room_id)
|
|
|
|
users = await self.store.get_local_users_related_to_room(room_id)
|
|
for user_id, membership in users:
|
|
# If the user is not in the room (or is banned), nothing to do.
|
|
if membership not in (Membership.JOIN, Membership.INVITE, Membership.KNOCK):
|
|
continue
|
|
|
|
logger.info("Kicking %r from %r...", user_id, room_id)
|
|
|
|
try:
|
|
# Kick users from room
|
|
target_requester = create_requester(
|
|
user_id, authenticated_entity=requester_user_id
|
|
)
|
|
_, stream_id = await self.room_member_handler.update_membership(
|
|
requester=target_requester,
|
|
target=target_requester.user,
|
|
room_id=room_id,
|
|
action=Membership.LEAVE,
|
|
content={},
|
|
ratelimit=False,
|
|
require_consent=False,
|
|
)
|
|
|
|
# Wait for leave to come in over replication before trying to forget.
|
|
await self._replication.wait_for_stream_position(
|
|
self.hs.config.worker.events_shard_config.get_instance(room_id),
|
|
"events",
|
|
stream_id,
|
|
)
|
|
|
|
await self.room_member_handler.forget(
|
|
target_requester.user, room_id, do_not_schedule_purge=True
|
|
)
|
|
|
|
# Join users to new room
|
|
if new_room_user_id:
|
|
assert new_room_id is not None
|
|
await self.room_member_handler.update_membership(
|
|
requester=target_requester,
|
|
target=target_requester.user,
|
|
room_id=new_room_id,
|
|
action=Membership.JOIN,
|
|
content={},
|
|
ratelimit=False,
|
|
require_consent=False,
|
|
)
|
|
|
|
result["kicked_users"].append(user_id)
|
|
if update_result_fct:
|
|
await update_result_fct(result)
|
|
except Exception:
|
|
logger.exception(
|
|
"Failed to leave old room and join new room for %r", user_id
|
|
)
|
|
result["failed_to_kick_users"].append(user_id)
|
|
if update_result_fct:
|
|
await update_result_fct(result)
|
|
|
|
# Send message in new room and move aliases
|
|
if new_room_user_id:
|
|
room_creator_requester = create_requester(
|
|
new_room_user_id, authenticated_entity=requester_user_id
|
|
)
|
|
|
|
await self.event_creation_handler.create_and_send_nonmember_event(
|
|
room_creator_requester,
|
|
{
|
|
"type": "m.room.message",
|
|
"content": {"body": message, "msgtype": "m.text"},
|
|
"room_id": new_room_id,
|
|
"sender": new_room_user_id,
|
|
},
|
|
ratelimit=False,
|
|
)
|
|
|
|
result["local_aliases"] = list(
|
|
await self.store.get_aliases_for_room(room_id)
|
|
)
|
|
|
|
assert new_room_id is not None
|
|
await self.store.update_aliases_for_room(
|
|
room_id, new_room_id, requester_user_id
|
|
)
|
|
else:
|
|
result["local_aliases"] = []
|
|
|
|
return result
|