diff options
Diffstat (limited to 'synapse/handlers/message.py')
| -rw-r--r-- | synapse/handlers/message.py | 50 |
1 files changed, 32 insertions, 18 deletions
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index 2643438e84..593c0cc6f1 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -15,9 +15,10 @@ # See the License for the specific language governing permissions and # limitations under the License. import logging +import random from typing import TYPE_CHECKING, Dict, List, Optional, Tuple -from canonicaljson import encode_canonical_json, json +from canonicaljson import encode_canonical_json from twisted.internet.interfaces import IDelayedCall @@ -34,6 +35,7 @@ from synapse.api.errors import ( Codes, ConsentNotGivenError, NotFoundError, + ShadowBanError, SynapseError, ) from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersions @@ -55,6 +57,7 @@ from synapse.types import ( UserID, create_requester, ) +from synapse.util import json_decoder from synapse.util.async_helpers import Linearizer from synapse.util.frozenutils import frozendict_json_encoder from synapse.util.metrics import measure_func @@ -667,14 +670,14 @@ class EventCreationHandler(object): assert self.hs.is_mine(user), "User must be our own: %s" % (user,) if event.is_state(): - prev_state = await self.deduplicate_state_event(event, context) - if prev_state is not None: + prev_event = await self.deduplicate_state_event(event, context) + if prev_event is not None: logger.info( "Not bothering to persist state event %s duplicated by %s", event.event_id, - prev_state.event_id, + prev_event.event_id, ) - return prev_state + return await self.store.get_stream_id_for_event(prev_event.event_id) return await self.handle_new_client_event( requester=requester, event=event, context=context, ratelimit=ratelimit @@ -682,27 +685,32 @@ class EventCreationHandler(object): async def deduplicate_state_event( self, event: EventBase, context: EventContext - ) -> None: + ) -> Optional[EventBase]: """ Checks whether event is in the latest resolved state in context. - If so, returns the version of the event in context. - Otherwise, returns None. + Args: + event: The event to check for duplication. + context: The event context. + + Returns: + The previous verion of the event is returned, if it is found in the + event context. Otherwise, None is returned. """ prev_state_ids = await context.get_prev_state_ids() prev_event_id = prev_state_ids.get((event.type, event.state_key)) if not prev_event_id: - return + return None prev_event = await self.store.get_event(prev_event_id, allow_none=True) if not prev_event: - return + return None if prev_event and event.user_id == prev_event.user_id: prev_content = encode_canonical_json(prev_event.content) next_content = encode_canonical_json(event.content) if prev_content == next_content: return prev_event - return + return None async def create_and_send_nonmember_event( self, @@ -710,12 +718,20 @@ class EventCreationHandler(object): event_dict: dict, ratelimit: bool = True, txn_id: Optional[str] = None, + ignore_shadow_ban: bool = False, ) -> Tuple[EventBase, int]: """ Creates an event, then sends it. See self.create_event and self.send_nonmember_event. + + Raises: + ShadowBanError if the requester has been shadow-banned. """ + if not ignore_shadow_ban and requester.shadow_banned: + # We randomly sleep a bit just to annoy the requester. + await self.clock.sleep(random.randint(1, 10)) + raise ShadowBanError() # We limit the number of concurrent event sends in a room so that we # don't fork the DAG too much. If we don't limit then we can end up in @@ -859,7 +875,7 @@ class EventCreationHandler(object): # Ensure that we can round trip before trying to persist in db try: dump = frozendict_json_encoder.encode(event.content) - json.loads(dump) + json_decoder.decode(dump) except Exception: logger.exception("Failed to encode content: %r", event.content) raise @@ -891,9 +907,7 @@ class EventCreationHandler(object): except Exception: # Ensure that we actually remove the entries in the push actions # staging area, if we calculated them. - run_in_background( - self.store.remove_push_actions_from_staging, event.event_id - ) + await self.store.remove_push_actions_from_staging(event.event_id) raise async def _validate_canonical_alias( @@ -957,7 +971,7 @@ class EventCreationHandler(object): allow_none=True, ) - is_admin_redaction = ( + is_admin_redaction = bool( original_event and event.sender != original_event.sender ) @@ -1077,8 +1091,8 @@ class EventCreationHandler(object): auth_events_ids = self.auth.compute_auth_events( event, prev_state_ids, for_verification=True ) - auth_events = await self.store.get_events(auth_events_ids) - auth_events = {(e.type, e.state_key): e for e in auth_events.values()} + auth_events_map = await self.store.get_events(auth_events_ids) + auth_events = {(e.type, e.state_key): e for e in auth_events_map.values()} room_version = await self.store.get_room_version_id(event.room_id) room_version_obj = KNOWN_ROOM_VERSIONS[room_version] |