diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/api/constants.py | 2 | ||||
| -rw-r--r-- | synapse/config/experimental.py | 3 | ||||
| -rw-r--r-- | synapse/handlers/message.py | 47 | ||||
| -rw-r--r-- | synapse/handlers/relations.py | 56 | ||||
| -rw-r--r-- | synapse/rest/client/room.py | 57 | ||||
| -rw-r--r-- | synapse/rest/client/versions.py | 2 | ||||
| -rw-r--r-- | synapse/storage/databases/main/relations.py | 36 |
7 files changed, 179 insertions, 24 deletions
diff --git a/synapse/api/constants.py b/synapse/api/constants.py index 44c5ffc6a5..bc04a0755b 100644 --- a/synapse/api/constants.py +++ b/synapse/api/constants.py @@ -125,6 +125,8 @@ class EventTypes: MSC2716_BATCH: Final = "org.matrix.msc2716.batch" MSC2716_MARKER: Final = "org.matrix.msc2716.marker" + Reaction: Final = "m.reaction" + class ToDeviceEventTypes: RoomKeyRequest: Final = "m.room_key_request" diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py index d9bdd66d55..d4b71d1673 100644 --- a/synapse/config/experimental.py +++ b/synapse/config/experimental.py @@ -128,3 +128,6 @@ class ExperimentalConfig(Config): self.msc3886_endpoint: Optional[str] = experimental.get( "msc3886_endpoint", None ) + + # MSC3912: Relation-based redactions. + self.msc3912_enabled: bool = experimental.get("msc3912_enabled", False) diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index 468900a07f..4cf593cfdc 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -877,6 +877,36 @@ class EventCreationHandler: return prev_event return None + async def get_event_from_transaction( + self, + requester: Requester, + txn_id: str, + room_id: str, + ) -> Optional[EventBase]: + """For the given transaction ID and room ID, check if there is a matching event. + If so, fetch it and return it. + + Args: + requester: The requester making the request in the context of which we want + to fetch the event. + txn_id: The transaction ID. + room_id: The room ID. + + Returns: + An event if one could be found, None otherwise. + """ + if requester.access_token_id: + existing_event_id = await self.store.get_event_id_from_transaction_id( + room_id, + requester.user.to_string(), + requester.access_token_id, + txn_id, + ) + if existing_event_id: + return await self.store.get_event(existing_event_id) + + return None + async def create_and_send_nonmember_event( self, requester: Requester, @@ -956,18 +986,17 @@ class EventCreationHandler: # extremities to pile up, which in turn leads to state resolution # taking longer. async with self.limiter.queue(event_dict["room_id"]): - if txn_id and requester.access_token_id: - existing_event_id = await self.store.get_event_id_from_transaction_id( - event_dict["room_id"], - requester.user.to_string(), - requester.access_token_id, - txn_id, + if txn_id: + event = await self.get_event_from_transaction( + requester, txn_id, event_dict["room_id"] ) - if existing_event_id: - event = await self.store.get_event(existing_event_id) + if event: # we know it was persisted, so must have a stream ordering assert event.internal_metadata.stream_ordering - return event, event.internal_metadata.stream_ordering + return ( + event, + event.internal_metadata.stream_ordering, + ) event, context = await self.create_event( requester, diff --git a/synapse/handlers/relations.py b/synapse/handlers/relations.py index 0a0c6d938e..8e71dda970 100644 --- a/synapse/handlers/relations.py +++ b/synapse/handlers/relations.py @@ -17,7 +17,7 @@ from typing import TYPE_CHECKING, Dict, FrozenSet, Iterable, List, Optional, Tup import attr -from synapse.api.constants import RelationTypes +from synapse.api.constants import EventTypes, RelationTypes from synapse.api.errors import SynapseError from synapse.events import EventBase, relation_from_event from synapse.logging.opentracing import trace @@ -75,6 +75,7 @@ class RelationsHandler: self._clock = hs.get_clock() self._event_handler = hs.get_event_handler() self._event_serializer = hs.get_event_client_serializer() + self._event_creation_handler = hs.get_event_creation_handler() async def get_relations( self, @@ -205,6 +206,59 @@ class RelationsHandler: return related_events, next_token + async def redact_events_related_to( + self, + requester: Requester, + event_id: str, + initial_redaction_event: EventBase, + relation_types: List[str], + ) -> None: + """Redacts all events related to the given event ID with one of the given + relation types. + + This method is expected to be called when redacting the event referred to by + the given event ID. + + If an event cannot be redacted (e.g. because of insufficient permissions), log + the error and try to redact the next one. + + Args: + requester: The requester to redact events on behalf of. + event_id: The event IDs to look and redact relations of. + initial_redaction_event: The redaction for the event referred to by + event_id. + relation_types: The types of relations to look for. + + Raises: + ShadowBanError if the requester is shadow-banned + """ + related_event_ids = ( + await self._main_store.get_all_relations_for_event_with_types( + event_id, relation_types + ) + ) + + for related_event_id in related_event_ids: + try: + await self._event_creation_handler.create_and_send_nonmember_event( + requester, + { + "type": EventTypes.Redaction, + "content": initial_redaction_event.content, + "room_id": initial_redaction_event.room_id, + "sender": requester.user.to_string(), + "redacts": related_event_id, + }, + ratelimit=False, + ) + except SynapseError as e: + logger.warning( + "Failed to redact event %s (related to event %s): %s", + related_event_id, + event_id, + e.msg, + ) + async def get_annotations_for_event( self, event_id: str, diff --git a/synapse/rest/client/room.py b/synapse/rest/client/room.py index 01e5079963..91cb791139 100644 --- a/synapse/rest/client/room.py +++ b/synapse/rest/client/room.py @@ -52,6 +52,7 @@ from synapse.http.servlet import ( from synapse.http.site import SynapseRequest from synapse.logging.context import make_deferred_yieldable, run_in_background from synapse.logging.opentracing import set_tag +from synapse.metrics.background_process_metrics import run_as_background_process from synapse.rest.client._base import client_patterns from synapse.rest.client.transactions import HttpTransactionCache from synapse.storage.state import StateFilter @@ -1029,6 +1030,8 @@ class RoomRedactEventRestServlet(TransactionRestServlet): super().__init__(hs) self.event_creation_handler = hs.get_event_creation_handler() self.auth = hs.get_auth() + self._relation_handler = hs.get_relations_handler() + self._msc3912_enabled = hs.config.experimental.msc3912_enabled def register(self, http_server: HttpServer) -> None: PATTERNS = "/rooms/(?P<room_id>[^/]*)/redact/(?P<event_id>[^/]*)" @@ -1045,20 +1048,46 @@ class RoomRedactEventRestServlet(TransactionRestServlet): content = parse_json_object_from_request(request) try: - ( - event, - _, - ) = await self.event_creation_handler.create_and_send_nonmember_event( - requester, - { - "type": EventTypes.Redaction, - "content": content, - "room_id": room_id, - "sender": requester.user.to_string(), - "redacts": event_id, - }, - txn_id=txn_id, - ) + with_relations = None + if self._msc3912_enabled and "org.matrix.msc3912.with_relations" in content: + with_relations = content["org.matrix.msc3912.with_relations"] + del content["org.matrix.msc3912.with_relations"] + + # Check if there's an existing event for this transaction now (even though + # create_and_send_nonmember_event also does it) because, if there's one, + # then we want to skip the call to redact_events_related_to. + event = None + if txn_id: + event = await self.event_creation_handler.get_event_from_transaction( + requester, txn_id, room_id + ) + + if event is None: + ( + event, + _, + ) = await self.event_creation_handler.create_and_send_nonmember_event( + requester, + { + "type": EventTypes.Redaction, + "content": content, + "room_id": room_id, + "sender": requester.user.to_string(), + "redacts": event_id, + }, + txn_id=txn_id, + ) + + if with_relations: + run_as_background_process( + "redact_related_events", + self._relation_handler.redact_events_related_to, + requester=requester, + event_id=event_id, + initial_redaction_event=event, + relation_types=with_relations, + ) + event_id = event.event_id except ShadowBanError: event_id = "$" + random_string(43) diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py index 9b1b72c68a..180a11ef88 100644 --- a/synapse/rest/client/versions.py +++ b/synapse/rest/client/versions.py @@ -119,6 +119,8 @@ class VersionsRestServlet(RestServlet): # Adds support for simple HTTP rendezvous as per MSC3886 "org.matrix.msc3886": self.config.experimental.msc3886_endpoint is not None, + # Adds support for relation-based redactions as per MSC3912. + "org.matrix.msc3912": self.config.experimental.msc3912_enabled, }, }, ) diff --git a/synapse/storage/databases/main/relations.py b/synapse/storage/databases/main/relations.py index c022510e76..ca431002c8 100644 --- a/synapse/storage/databases/main/relations.py +++ b/synapse/storage/databases/main/relations.py @@ -295,6 +295,42 @@ class RelationsWorkerStore(SQLBaseStore): "get_recent_references_for_event", _get_recent_references_for_event_txn ) + async def get_all_relations_for_event_with_types( + self, + event_id: str, + relation_types: List[str], + ) -> List[str]: + """Get the event IDs of all events that have a relation to the given event with + one of the given relation types. + + Args: + event_id: The event for which to look for related events. + relation_types: The types of relations to look for. + + Returns: + A list of the IDs of the events that relate to the given event with one of + the given relation types. + """ + + def get_all_relation_ids_for_event_with_types_txn( + txn: LoggingTransaction, + ) -> List[str]: + rows = self.db_pool.simple_select_many_txn( + txn=txn, + table="event_relations", + column="relation_type", + iterable=relation_types, + keyvalues={"relates_to_id": event_id}, + retcols=["event_id"], + ) + + return [row["event_id"] for row in rows] + + return await self.db_pool.runInteraction( + desc="get_all_relation_ids_for_event_with_types", + func=get_all_relation_ids_for_event_with_types_txn, + ) + async def event_includes_relation(self, event_id: str) -> bool: """Check if the given event relates to another event. |