diff options
Diffstat (limited to 'synapse/handlers/message.py')
| -rw-r--r-- | synapse/handlers/message.py | 96 |
1 files changed, 82 insertions, 14 deletions
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index bcb093ba3e..4d006df63c 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -25,17 +25,24 @@ from twisted.internet import defer from twisted.internet.defer import succeed from synapse.api.constants import MAX_DEPTH, EventTypes, Membership -from synapse.api.errors import AuthError, Codes, ConsentNotGivenError, SynapseError +from synapse.api.errors import ( + AuthError, + Codes, + ConsentNotGivenError, + NotFoundError, + SynapseError, +) from synapse.api.urls import ConsentURIBuilder from synapse.crypto.event_signing import add_hashes_and_signatures from synapse.events.utils import serialize_event from synapse.events.validator import EventValidator from synapse.replication.http.send_event import ReplicationSendEventRestServlet from synapse.types import RoomAlias, UserID -from synapse.util.async import Linearizer +from synapse.util.async_helpers import Linearizer from synapse.util.frozenutils import frozendict_json_encoder from synapse.util.logcontext import run_in_background from synapse.util.metrics import measure_func +from synapse.visibility import filter_events_for_client from ._base import BaseHandler @@ -82,28 +89,85 @@ class MessageHandler(object): defer.returnValue(data) @defer.inlineCallbacks - def get_state_events(self, user_id, room_id, is_guest=False): + def get_state_events( + self, user_id, room_id, types=None, filtered_types=None, + at_token=None, is_guest=False, + ): """Retrieve all state events for a given room. If the user is joined to the room then return the current state. If the user has - left the room return the state events from when they left. + left the room return the state events from when they left. If an explicit + 'at' parameter is passed, return the state events as of that event, if + visible. Args: user_id(str): The user requesting state events. room_id(str): The room ID to get all state events from. + types(list[(str, str|None)]|None): List of (type, state_key) tuples + which are used to filter the state fetched. If `state_key` is None, + all events are returned of the given type. + May be None, which matches any key. + filtered_types(list[str]|None): Only apply filtering via `types` to this + list of event types. Other types of events are returned unfiltered. + If None, `types` filtering is applied to all events. + at_token(StreamToken|None): the stream token of the at which we are requesting + the stats. If the user is not allowed to view the state as of that + stream token, we raise a 403 SynapseError. If None, returns the current + state based on the current_state_events table. + is_guest(bool): whether this user is a guest Returns: A list of dicts representing state events. [{}, {}, {}] + Raises: + NotFoundError (404) if the at token does not yield an event + + AuthError (403) if the user doesn't have permission to view + members of this room. """ - membership, membership_event_id = yield self.auth.check_in_room_or_world_readable( - room_id, user_id - ) + if at_token: + # FIXME this claims to get the state at a stream position, but + # get_recent_events_for_room operates by topo ordering. This therefore + # does not reliably give you the state at the given stream position. + # (https://github.com/matrix-org/synapse/issues/3305) + last_events, _ = yield self.store.get_recent_events_for_room( + room_id, end_token=at_token.room_key, limit=1, + ) - if membership == Membership.JOIN: - room_state = yield self.state.get_current_state(room_id) - elif membership == Membership.LEAVE: - room_state = yield self.store.get_state_for_events( - [membership_event_id], None + if not last_events: + raise NotFoundError("Can't find event for token %s" % (at_token, )) + + visible_events = yield filter_events_for_client( + self.store, user_id, last_events, ) - room_state = room_state[membership_event_id] + + event = last_events[0] + if visible_events: + room_state = yield self.store.get_state_for_events( + [event.event_id], types, filtered_types=filtered_types, + ) + room_state = room_state[event.event_id] + else: + raise AuthError( + 403, + "User %s not allowed to view events in room %s at token %s" % ( + user_id, room_id, at_token, + ) + ) + else: + membership, membership_event_id = ( + yield self.auth.check_in_room_or_world_readable( + room_id, user_id, + ) + ) + + if membership == Membership.JOIN: + state_ids = yield self.store.get_filtered_current_state_ids( + room_id, types, filtered_types=filtered_types, + ) + room_state = yield self.store.get_events(state_ids.values()) + elif membership == Membership.LEAVE: + room_state = yield self.store.get_state_for_events( + [membership_event_id], types, filtered_types=filtered_types, + ) + room_state = room_state[membership_event_id] now = self.clock.time_msec() defer.returnValue( @@ -212,10 +276,14 @@ class EventCreationHandler(object): where *hashes* is a map from algorithm to hash. If None, they will be requested from the database. - + Raises: + ResourceLimitError if server is blocked to some resource being + exceeded Returns: Tuple of created event (FrozenEvent), Context """ + yield self.auth.check_auth_blocking(requester.user.to_string()) + builder = self.event_builder_factory.new(event_dict) self.validator.validate_new(builder) |