248 lines
9.3 KiB
Python
248 lines
9.3 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import abc
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import logging
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from typing import TYPE_CHECKING, Any, Dict, List, Optional, Set
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from synapse.api.constants import Membership
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from synapse.events import EventBase
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from synapse.types import JsonDict, RoomStreamToken, StateMap, UserID
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from synapse.visibility import filter_events_for_client
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from ._base import BaseHandler
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if TYPE_CHECKING:
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from synapse.app.homeserver import HomeServer
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logger = logging.getLogger(__name__)
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class AdminHandler(BaseHandler):
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def __init__(self, hs: "HomeServer"):
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super().__init__(hs)
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self.storage = hs.get_storage()
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self.state_store = self.storage.state
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async def get_whois(self, user: UserID) -> JsonDict:
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connections = []
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sessions = await self.store.get_user_ip_and_agents(user)
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for session in sessions:
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connections.append(
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{
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"ip": session["ip"],
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"last_seen": session["last_seen"],
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"user_agent": session["user_agent"],
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}
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)
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ret = {
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"user_id": user.to_string(),
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"devices": {"": {"sessions": [{"connections": connections}]}},
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}
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return ret
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async def get_user(self, user: UserID) -> Optional[JsonDict]:
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"""Function to get user details"""
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ret = await self.store.get_user_by_id(user.to_string())
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if ret:
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profile = await self.store.get_profileinfo(user.localpart)
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threepids = await self.store.user_get_threepids(user.to_string())
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ret["displayname"] = profile.display_name
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ret["avatar_url"] = profile.avatar_url
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ret["threepids"] = threepids
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return ret
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async def export_user_data(self, user_id: str, writer: "ExfiltrationWriter") -> Any:
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"""Write all data we have on the user to the given writer.
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Args:
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user_id: The user ID to fetch data of.
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writer: The writer to write to.
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Returns:
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Resolves when all data for a user has been written.
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The returned value is that returned by `writer.finished()`.
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"""
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# Get all rooms the user is in or has been in
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rooms = await self.store.get_rooms_for_local_user_where_membership_is(
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user_id,
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membership_list=(
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Membership.JOIN,
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Membership.LEAVE,
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Membership.BAN,
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Membership.INVITE,
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),
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)
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# We only try and fetch events for rooms the user has been in. If
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# they've been e.g. invited to a room without joining then we handle
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# those separately.
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rooms_user_has_been_in = await self.store.get_rooms_user_has_been_in(user_id)
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for index, room in enumerate(rooms):
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room_id = room.room_id
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logger.info(
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"[%s] Handling room %s, %d/%d", user_id, room_id, index + 1, len(rooms)
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)
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forgotten = await self.store.did_forget(user_id, room_id)
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if forgotten:
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logger.info("[%s] User forgot room %d, ignoring", user_id, room_id)
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continue
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if room_id not in rooms_user_has_been_in:
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# If we haven't been in the rooms then the filtering code below
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# won't return anything, so we need to handle these cases
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# explicitly.
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if room.membership == Membership.INVITE:
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event_id = room.event_id
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invite = await self.store.get_event(event_id, allow_none=True)
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if invite:
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invited_state = invite.unsigned["invite_room_state"]
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writer.write_invite(room_id, invite, invited_state)
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continue
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# We only want to bother fetching events up to the last time they
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# were joined. We estimate that point by looking at the
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# stream_ordering of the last membership if it wasn't a join.
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if room.membership == Membership.JOIN:
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stream_ordering = self.store.get_room_max_stream_ordering()
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else:
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stream_ordering = room.stream_ordering
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from_key = RoomStreamToken(0, 0)
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to_key = RoomStreamToken(None, stream_ordering)
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# Events that we've processed in this room
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written_events = set() # type: Set[str]
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# We need to track gaps in the events stream so that we can then
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# write out the state at those events. We do this by keeping track
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# of events whose prev events we haven't seen.
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# Map from event ID to prev events that haven't been processed,
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# dict[str, set[str]].
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event_to_unseen_prevs = {}
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# The reverse mapping to above, i.e. map from unseen event to events
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# that have the unseen event in their prev_events, i.e. the unseen
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# events "children".
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unseen_to_child_events = {} # type: Dict[str, Set[str]]
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# We fetch events in the room the user could see by fetching *all*
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# events that we have and then filtering, this isn't the most
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# efficient method perhaps but it does guarantee we get everything.
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while True:
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events, _ = await self.store.paginate_room_events(
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room_id, from_key, to_key, limit=100, direction="f"
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)
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if not events:
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break
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from_key = events[-1].internal_metadata.after
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events = await filter_events_for_client(self.storage, user_id, events)
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writer.write_events(room_id, events)
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# Update the extremity tracking dicts
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for event in events:
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# Check if we have any prev events that haven't been
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# processed yet, and add those to the appropriate dicts.
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unseen_events = set(event.prev_event_ids()) - written_events
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if unseen_events:
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event_to_unseen_prevs[event.event_id] = unseen_events
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for unseen in unseen_events:
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unseen_to_child_events.setdefault(unseen, set()).add(
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event.event_id
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)
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# Now check if this event is an unseen prev event, if so
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# then we remove this event from the appropriate dicts.
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for child_id in unseen_to_child_events.pop(event.event_id, []):
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event_to_unseen_prevs[child_id].discard(event.event_id)
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written_events.add(event.event_id)
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logger.info(
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"Written %d events in room %s", len(written_events), room_id
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)
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# Extremities are the events who have at least one unseen prev event.
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extremities = (
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event_id
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for event_id, unseen_prevs in event_to_unseen_prevs.items()
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if unseen_prevs
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)
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for event_id in extremities:
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if not event_to_unseen_prevs[event_id]:
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continue
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state = await self.state_store.get_state_for_event(event_id)
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writer.write_state(room_id, event_id, state)
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return writer.finished()
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class ExfiltrationWriter(metaclass=abc.ABCMeta):
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"""Interface used to specify how to write exported data.
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"""
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@abc.abstractmethod
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def write_events(self, room_id: str, events: List[EventBase]) -> None:
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"""Write a batch of events for a room.
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def write_state(
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self, room_id: str, event_id: str, state: StateMap[EventBase]
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) -> None:
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"""Write the state at the given event in the room.
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This only gets called for backward extremities rather than for each
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event.
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def write_invite(
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self, room_id: str, event: EventBase, state: StateMap[dict]
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) -> None:
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"""Write an invite for the room, with associated invite state.
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Args:
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room_id: The room ID the invite is for.
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event: The invite event.
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state: A subset of the state at the invite, with a subset of the
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event keys (type, state_key content and sender).
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def finished(self) -> Any:
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"""Called when all data has successfully been exported and written.
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This functions return value is passed to the caller of
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`export_user_data`.
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"""
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raise NotImplementedError()
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