Add forward extremities endpoint to rooms admin API

GET /_synapse/admin/v1/rooms/<identifier>/forward_extremities now gets forward extremities for a room, returning count and the list of extremities.

Signed-off-by: Jason Robinson <jasonr@matrix.org>
This commit is contained in:
Jason Robinson 2021-01-07 23:01:59 +02:00
parent b530eaa262
commit b849e46139
4 changed files with 77 additions and 0 deletions

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@ -36,6 +36,7 @@ from synapse.rest.admin.media import ListMediaInRoom, register_servlets_for_medi
from synapse.rest.admin.purge_room_servlet import PurgeRoomServlet
from synapse.rest.admin.rooms import (
DeleteRoomRestServlet,
ForwardExtremitiesRestServlet,
JoinRoomAliasServlet,
ListRoomRestServlet,
MakeRoomAdminRestServlet,
@ -230,6 +231,7 @@ def register_servlets(hs, http_server):
EventReportsRestServlet(hs).register(http_server)
PushersRestServlet(hs).register(http_server)
MakeRoomAdminRestServlet(hs).register(http_server)
ForwardExtremitiesRestServlet(hs).register(http_server)
def register_servlets_for_client_rest_resource(hs, http_server):

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@ -499,3 +499,56 @@ class MakeRoomAdminRestServlet(RestServlet):
)
return 200, {}
class ForwardExtremitiesRestServlet(RestServlet):
"""Allows a server admin to get or clear forward extremities.
Clearing does not require restarting the server.
Clear forward extremities:
DELETE /_synapse/admin/v1/rooms/<room_id_or_alias>/forward_extremities
Get forward_extremities:
GET /_synapse/admin/v1/rooms/<room_id_or_alias>/forward_extremities
"""
PATTERNS = admin_patterns("/rooms/(?P<room_identifier>[^/]*)/forward_extremities")
def __init__(self, hs: "HomeServer"):
self.hs = hs
self.auth = hs.get_auth()
self.room_member_handler = hs.get_room_member_handler()
self.store = hs.get_datastore()
async def resolve_room_id(self, room_identifier: str) -> str:
"""Resolve to a room ID, if necessary."""
if RoomID.is_valid(room_identifier):
return room_identifier
elif RoomAlias.is_valid(room_identifier):
room_alias = RoomAlias.from_string(room_identifier)
room_id, _ = await self.room_member_handler.lookup_room_alias(room_alias)
return room_id.to_string()
raise SynapseError(
400, "%s was not legal room ID or room alias" % (room_identifier,)
)
async def on_DELETE(self, request, room_identifier):
requester = await self.auth.get_user_by_req(request)
await assert_user_is_admin(self.auth, requester.user)
room_id = await self.resolve_room_id(room_identifier)
async def on_GET(self, request, room_identifier):
requester = await self.auth.get_user_by_req(request)
await assert_user_is_admin(self.auth, requester.user)
room_id = await self.resolve_room_id(room_identifier)
if not room_id:
raise SynapseError(400, "Unknown room ID or room alias %s" % room_identifier)
extremities = await self.store.get_forward_extremities_for_room(room_id)
return 200, {
"count": len(extremities),
"results": extremities,
}

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@ -43,6 +43,7 @@ from .end_to_end_keys import EndToEndKeyStore
from .event_federation import EventFederationStore
from .event_push_actions import EventPushActionsStore
from .events_bg_updates import EventsBackgroundUpdatesStore
from .events_forward_extremities import EventForwardExtremitiesStore
from .filtering import FilteringStore
from .group_server import GroupServerStore
from .keys import KeyStore
@ -118,6 +119,7 @@ class DataStore(
UIAuthStore,
CacheInvalidationWorkerStore,
ServerMetricsStore,
EventForwardExtremitiesStore,
):
def __init__(self, database: DatabasePool, db_conn, hs):
self.hs = hs

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@ -0,0 +1,20 @@
from typing import List, Dict
from synapse.storage._base import SQLBaseStore
class EventForwardExtremitiesStore(SQLBaseStore):
async def get_forward_extremities_for_room(self, room_id: str) -> List[Dict]:
def get_forward_extremities_for_room_txn(txn):
sql = (
"SELECT event_id, state_group FROM event_forward_extremities NATURAL JOIN event_to_state_groups "
"WHERE room_id = ?"
)
txn.execute(sql, (room_id,))
rows = txn.fetchall()
return [{"event_id": row[0], "state_group": row[1]} for row in rows]
return await self.db_pool.runInteraction(
"get_forward_extremities_for_room", get_forward_extremities_for_room_txn
)