diff options
Diffstat (limited to 'synapse/rest/client/room_batch.py')
| -rw-r--r-- | synapse/rest/client/room_batch.py | 377 |
1 files changed, 76 insertions, 301 deletions
diff --git a/synapse/rest/client/room_batch.py b/synapse/rest/client/room_batch.py index f73ccc7f65..38ad4c2447 100644 --- a/synapse/rest/client/room_batch.py +++ b/synapse/rest/client/room_batch.py @@ -15,13 +15,12 @@ import logging import re from http import HTTPStatus -from typing import TYPE_CHECKING, Awaitable, List, Tuple +from typing import TYPE_CHECKING, Awaitable, Tuple from twisted.web.server import Request -from synapse.api.constants import EventContentFields, EventTypes +from synapse.api.constants import EventContentFields from synapse.api.errors import AuthError, Codes, SynapseError -from synapse.appservice import ApplicationService from synapse.http.server import HttpServer from synapse.http.servlet import ( RestServlet, @@ -32,7 +31,7 @@ from synapse.http.servlet import ( ) from synapse.http.site import SynapseRequest from synapse.rest.client.transactions import HttpTransactionCache -from synapse.types import JsonDict, Requester, UserID, create_requester +from synapse.types import JsonDict from synapse.util.stringutils import random_string if TYPE_CHECKING: @@ -43,25 +42,25 @@ logger = logging.getLogger(__name__) class RoomBatchSendEventRestServlet(RestServlet): """ - API endpoint which can insert a chunk of events historically back in time + API endpoint which can insert a batch of events historically back in time next to the given `prev_event`. - `chunk_id` comes from `next_chunk_id `in the response of the batch send - endpoint and is derived from the "insertion" events added to each chunk. + `batch_id` comes from `next_batch_id `in the response of the batch send + endpoint and is derived from the "insertion" events added to each batch. It's not required for the first batch send. `state_events_at_start` is used to define the historical state events needed to auth the events like join events. These events will float outside of the normal DAG as outlier's and won't be visible in the chat - history which also allows us to insert multiple chunks without having a bunch - of `@mxid joined the room` noise between each chunk. + history which also allows us to insert multiple batches without having a bunch + of `@mxid joined the room` noise between each batch. - `events` is chronological chunk/list of events you want to insert. - There is a reverse-chronological constraint on chunks so once you insert + `events` is chronological list of events you want to insert. + There is a reverse-chronological constraint on batches so once you insert some messages, you can only insert older ones after that. - tldr; Insert chunks from your most recent history -> oldest history. + tldr; Insert batches from your most recent history -> oldest history. - POST /_matrix/client/unstable/org.matrix.msc2716/rooms/<roomID>/batch_send?prev_event_id=<eventID>&chunk_id=<chunkID> + POST /_matrix/client/unstable/org.matrix.msc2716/rooms/<roomID>/batch_send?prev_event_id=<eventID>&batch_id=<batchID> { "events": [ ... ], "state_events_at_start": [ ... ] @@ -77,102 +76,12 @@ class RoomBatchSendEventRestServlet(RestServlet): def __init__(self, hs: "HomeServer"): super().__init__() - self.hs = hs self.store = hs.get_datastore() - self.state_store = hs.get_storage().state self.event_creation_handler = hs.get_event_creation_handler() - self.room_member_handler = hs.get_room_member_handler() self.auth = hs.get_auth() + self.room_batch_handler = hs.get_room_batch_handler() self.txns = HttpTransactionCache(hs) - async def _inherit_depth_from_prev_ids(self, prev_event_ids: List[str]) -> int: - ( - most_recent_prev_event_id, - most_recent_prev_event_depth, - ) = await self.store.get_max_depth_of(prev_event_ids) - - # We want to insert the historical event after the `prev_event` but before the successor event - # - # We inherit depth from the successor event instead of the `prev_event` - # because events returned from `/messages` are first sorted by `topological_ordering` - # which is just the `depth` and then tie-break with `stream_ordering`. - # - # We mark these inserted historical events as "backfilled" which gives them a - # negative `stream_ordering`. If we use the same depth as the `prev_event`, - # then our historical event will tie-break and be sorted before the `prev_event` - # when it should come after. - # - # We want to use the successor event depth so they appear after `prev_event` because - # it has a larger `depth` but before the successor event because the `stream_ordering` - # is negative before the successor event. - successor_event_ids = await self.store.get_successor_events( - [most_recent_prev_event_id] - ) - - # If we can't find any successor events, then it's a forward extremity of - # historical messages and we can just inherit from the previous historical - # event which we can already assume has the correct depth where we want - # to insert into. - if not successor_event_ids: - depth = most_recent_prev_event_depth - else: - ( - _, - oldest_successor_depth, - ) = await self.store.get_min_depth_of(successor_event_ids) - - depth = oldest_successor_depth - - return depth - - def _create_insertion_event_dict( - self, sender: str, room_id: str, origin_server_ts: int - ) -> JsonDict: - """Creates an event dict for an "insertion" event with the proper fields - and a random chunk ID. - - Args: - sender: The event author MXID - room_id: The room ID that the event belongs to - origin_server_ts: Timestamp when the event was sent - - Returns: - The new event dictionary to insert. - """ - - next_chunk_id = random_string(8) - insertion_event = { - "type": EventTypes.MSC2716_INSERTION, - "sender": sender, - "room_id": room_id, - "content": { - EventContentFields.MSC2716_NEXT_CHUNK_ID: next_chunk_id, - EventContentFields.MSC2716_HISTORICAL: True, - }, - "origin_server_ts": origin_server_ts, - } - - return insertion_event - - async def _create_requester_for_user_id_from_app_service( - self, user_id: str, app_service: ApplicationService - ) -> Requester: - """Creates a new requester for the given user_id - and validates that the app service is allowed to control - the given user. - - Args: - user_id: The author MXID that the app service is controlling - app_service: The app service that controls the user - - Returns: - Requester object - """ - - await self.auth.validate_appservice_can_control_user_id(app_service, user_id) - - return create_requester(user_id, app_service=app_service) - async def on_POST( self, request: SynapseRequest, room_id: str ) -> Tuple[int, JsonDict]: @@ -191,7 +100,7 @@ class RoomBatchSendEventRestServlet(RestServlet): prev_event_ids_from_query = parse_strings_from_args( request.args, "prev_event_id" ) - chunk_id_from_query = parse_string(request, "chunk_id") + batch_id_from_query = parse_string(request, "batch_id") if prev_event_ids_from_query is None: raise SynapseError( @@ -200,121 +109,62 @@ class RoomBatchSendEventRestServlet(RestServlet): errcode=Codes.MISSING_PARAM, ) + # Verify the batch_id_from_query corresponds to an actual insertion event + # and have the batch connected. + if batch_id_from_query: + corresponding_insertion_event_id = ( + await self.store.get_insertion_event_by_batch_id( + room_id, batch_id_from_query + ) + ) + if corresponding_insertion_event_id is None: + raise SynapseError( + HTTPStatus.BAD_REQUEST, + "No insertion event corresponds to the given ?batch_id", + errcode=Codes.INVALID_PARAM, + ) + # For the event we are inserting next to (`prev_event_ids_from_query`), # find the most recent auth events (derived from state events) that # allowed that message to be sent. We will use that as a base # to auth our historical messages against. - ( - most_recent_prev_event_id, - _, - ) = await self.store.get_max_depth_of(prev_event_ids_from_query) - # mapping from (type, state_key) -> state_event_id - prev_state_map = await self.state_store.get_state_ids_for_event( - most_recent_prev_event_id + auth_event_ids = await self.room_batch_handler.get_most_recent_auth_event_ids_from_event_id_list( + prev_event_ids_from_query ) - # List of state event ID's - prev_state_ids = list(prev_state_map.values()) - auth_event_ids = prev_state_ids - - state_event_ids_at_start = [] - for state_event in body["state_events_at_start"]: - assert_params_in_dict( - state_event, ["type", "origin_server_ts", "content", "sender"] - ) - logger.debug( - "RoomBatchSendEventRestServlet inserting state_event=%s, auth_event_ids=%s", - state_event, - auth_event_ids, + # Create and persist all of the state events that float off on their own + # before the batch. These will most likely be all of the invite/member + # state events used to auth the upcoming historical messages. + state_event_ids_at_start = ( + await self.room_batch_handler.persist_state_events_at_start( + state_events_at_start=body["state_events_at_start"], + room_id=room_id, + initial_auth_event_ids=auth_event_ids, + app_service_requester=requester, ) + ) + # Update our ongoing auth event ID list with all of the new state we + # just created + auth_event_ids.extend(state_event_ids_at_start) - event_dict = { - "type": state_event["type"], - "origin_server_ts": state_event["origin_server_ts"], - "content": state_event["content"], - "room_id": room_id, - "sender": state_event["sender"], - "state_key": state_event["state_key"], - } - - # Mark all events as historical - event_dict["content"][EventContentFields.MSC2716_HISTORICAL] = True - - # Make the state events float off on their own - fake_prev_event_id = "$" + random_string(43) - - # TODO: This is pretty much the same as some other code to handle inserting state in this file - if event_dict["type"] == EventTypes.Member: - membership = event_dict["content"].get("membership", None) - event_id, _ = await self.room_member_handler.update_membership( - await self._create_requester_for_user_id_from_app_service( - state_event["sender"], requester.app_service - ), - target=UserID.from_string(event_dict["state_key"]), - room_id=room_id, - action=membership, - content=event_dict["content"], - outlier=True, - prev_event_ids=[fake_prev_event_id], - # Make sure to use a copy of this list because we modify it - # later in the loop here. Otherwise it will be the same - # reference and also update in the event when we append later. - auth_event_ids=auth_event_ids.copy(), - ) - else: - # TODO: Add some complement tests that adds state that is not member joins - # and will use this code path. Maybe we only want to support join state events - # and can get rid of this `else`? - ( - event, - _, - ) = await self.event_creation_handler.create_and_send_nonmember_event( - await self._create_requester_for_user_id_from_app_service( - state_event["sender"], requester.app_service - ), - event_dict, - outlier=True, - prev_event_ids=[fake_prev_event_id], - # Make sure to use a copy of this list because we modify it - # later in the loop here. Otherwise it will be the same - # reference and also update in the event when we append later. - auth_event_ids=auth_event_ids.copy(), - ) - event_id = event.event_id - - state_event_ids_at_start.append(event_id) - auth_event_ids.append(event_id) - - events_to_create = body["events"] - - inherited_depth = await self._inherit_depth_from_prev_ids( + inherited_depth = await self.room_batch_handler.inherit_depth_from_prev_ids( prev_event_ids_from_query ) - # Figure out which chunk to connect to. If they passed in - # chunk_id_from_query let's use it. The chunk ID passed in comes - # from the chunk_id in the "insertion" event from the previous chunk. - last_event_in_chunk = events_to_create[-1] - chunk_id_to_connect_to = chunk_id_from_query + events_to_create = body["events"] + + # Figure out which batch to connect to. If they passed in + # batch_id_from_query let's use it. The batch ID passed in comes + # from the batch_id in the "insertion" event from the previous batch. + last_event_in_batch = events_to_create[-1] base_insertion_event = None - if chunk_id_from_query: + if batch_id_from_query: + batch_id_to_connect_to = batch_id_from_query # All but the first base insertion event should point at a fake # event, which causes the HS to ask for the state at the start of - # the chunk later. + # the batch later. + fake_prev_event_id = "$" + random_string(43) prev_event_ids = [fake_prev_event_id] - - # Verify the chunk_id_from_query corresponds to an actual insertion event - # and have the chunk connected. - corresponding_insertion_event_id = ( - await self.store.get_insertion_event_by_chunk_id(chunk_id_from_query) - ) - if corresponding_insertion_event_id is None: - raise SynapseError( - 400, - "No insertion event corresponds to the given ?chunk_id", - errcode=Codes.INVALID_PARAM, - ) - pass # Otherwise, create an insertion event to act as a starting point. # # We don't always have an insertion event to start hanging more history @@ -325,10 +175,12 @@ class RoomBatchSendEventRestServlet(RestServlet): else: prev_event_ids = prev_event_ids_from_query - base_insertion_event_dict = self._create_insertion_event_dict( - sender=requester.user.to_string(), - room_id=room_id, - origin_server_ts=last_event_in_chunk["origin_server_ts"], + base_insertion_event_dict = ( + self.room_batch_handler.create_insertion_event_dict( + sender=requester.user.to_string(), + room_id=room_id, + origin_server_ts=last_event_in_batch["origin_server_ts"], + ) ) base_insertion_event_dict["prev_events"] = prev_event_ids.copy() @@ -336,7 +188,7 @@ class RoomBatchSendEventRestServlet(RestServlet): base_insertion_event, _, ) = await self.event_creation_handler.create_and_send_nonmember_event( - await self._create_requester_for_user_id_from_app_service( + await self.room_batch_handler.create_requester_for_user_id_from_app_service( base_insertion_event_dict["sender"], requester.app_service, ), @@ -347,109 +199,32 @@ class RoomBatchSendEventRestServlet(RestServlet): depth=inherited_depth, ) - chunk_id_to_connect_to = base_insertion_event["content"][ - EventContentFields.MSC2716_NEXT_CHUNK_ID + batch_id_to_connect_to = base_insertion_event["content"][ + EventContentFields.MSC2716_NEXT_BATCH_ID ] - # Connect this current chunk to the insertion event from the previous chunk - chunk_event = { - "type": EventTypes.MSC2716_CHUNK, - "sender": requester.user.to_string(), - "room_id": room_id, - "content": { - EventContentFields.MSC2716_CHUNK_ID: chunk_id_to_connect_to, - EventContentFields.MSC2716_HISTORICAL: True, - }, - # Since the chunk event is put at the end of the chunk, - # where the newest-in-time event is, copy the origin_server_ts from - # the last event we're inserting - "origin_server_ts": last_event_in_chunk["origin_server_ts"], - } - # Add the chunk event to the end of the chunk (newest-in-time) - events_to_create.append(chunk_event) - - # Add an "insertion" event to the start of each chunk (next to the oldest-in-time - # event in the chunk) so the next chunk can be connected to this one. - insertion_event = self._create_insertion_event_dict( - sender=requester.user.to_string(), + # Create and persist all of the historical events as well as insertion + # and batch meta events to make the batch navigable in the DAG. + event_ids, next_batch_id = await self.room_batch_handler.handle_batch_of_events( + events_to_create=events_to_create, room_id=room_id, - # Since the insertion event is put at the start of the chunk, - # where the oldest-in-time event is, copy the origin_server_ts from - # the first event we're inserting - origin_server_ts=events_to_create[0]["origin_server_ts"], + batch_id_to_connect_to=batch_id_to_connect_to, + initial_prev_event_ids=prev_event_ids, + inherited_depth=inherited_depth, + auth_event_ids=auth_event_ids, + app_service_requester=requester, ) - # Prepend the insertion event to the start of the chunk (oldest-in-time) - events_to_create = [insertion_event] + events_to_create - - event_ids = [] - events_to_persist = [] - for ev in events_to_create: - assert_params_in_dict(ev, ["type", "origin_server_ts", "content", "sender"]) - - event_dict = { - "type": ev["type"], - "origin_server_ts": ev["origin_server_ts"], - "content": ev["content"], - "room_id": room_id, - "sender": ev["sender"], # requester.user.to_string(), - "prev_events": prev_event_ids.copy(), - } - - # Mark all events as historical - event_dict["content"][EventContentFields.MSC2716_HISTORICAL] = True - - event, context = await self.event_creation_handler.create_event( - await self._create_requester_for_user_id_from_app_service( - ev["sender"], requester.app_service - ), - event_dict, - prev_event_ids=event_dict.get("prev_events"), - auth_event_ids=auth_event_ids, - historical=True, - depth=inherited_depth, - ) - logger.debug( - "RoomBatchSendEventRestServlet inserting event=%s, prev_event_ids=%s, auth_event_ids=%s", - event, - prev_event_ids, - auth_event_ids, - ) - - assert self.hs.is_mine_id(event.sender), "User must be our own: %s" % ( - event.sender, - ) - - events_to_persist.append((event, context)) - event_id = event.event_id - - event_ids.append(event_id) - prev_event_ids = [event_id] - - # Persist events in reverse-chronological order so they have the - # correct stream_ordering as they are backfilled (which decrements). - # Events are sorted by (topological_ordering, stream_ordering) - # where topological_ordering is just depth. - for (event, context) in reversed(events_to_persist): - ev = await self.event_creation_handler.handle_new_client_event( - await self._create_requester_for_user_id_from_app_service( - event["sender"], requester.app_service - ), - event=event, - context=context, - ) insertion_event_id = event_ids[0] - chunk_event_id = event_ids[-1] + batch_event_id = event_ids[-1] historical_event_ids = event_ids[1:-1] response_dict = { "state_event_ids": state_event_ids_at_start, "event_ids": historical_event_ids, - "next_chunk_id": insertion_event["content"][ - EventContentFields.MSC2716_NEXT_CHUNK_ID - ], + "next_batch_id": next_batch_id, "insertion_event_id": insertion_event_id, - "chunk_event_id": chunk_event_id, + "batch_event_id": batch_event_id, } if base_insertion_event is not None: response_dict["base_insertion_event_id"] = base_insertion_event.event_id |