diff options
| -rw-r--r-- | changelog.d/9150.feature | 1 | ||||
| -rw-r--r-- | docs/admin_api/rooms.md | 119 | ||||
| -rw-r--r-- | synapse/handlers/room.py | 21 | ||||
| -rw-r--r-- | synapse/rest/admin/__init__.py | 2 | ||||
| -rw-r--r-- | synapse/rest/admin/rooms.py | 65 | ||||
| -rw-r--r-- | synapse/rest/client/v1/room.py | 2 | ||||
| -rw-r--r-- | synapse/visibility.py | 1 | ||||
| -rw-r--r-- | tests/rest/admin/test_room.py | 84 |
8 files changed, 289 insertions, 6 deletions
diff --git a/changelog.d/9150.feature b/changelog.d/9150.feature new file mode 100644 index 0000000000..48a8148dee --- /dev/null +++ b/changelog.d/9150.feature @@ -0,0 +1 @@ +New API /_synapse/admin/rooms/{roomId}/context/{eventId}. diff --git a/docs/admin_api/rooms.md b/docs/admin_api/rooms.md index 3832b36407..bc737b30f5 100644 --- a/docs/admin_api/rooms.md +++ b/docs/admin_api/rooms.md @@ -10,6 +10,7 @@ * [Undoing room shutdowns](#undoing-room-shutdowns) - [Make Room Admin API](#make-room-admin-api) - [Forward Extremities Admin API](#forward-extremities-admin-api) +- [Event Context API](#event-context-api) # List Room API @@ -594,3 +595,121 @@ that were deleted. "deleted": 1 } ``` + +# Event Context API + +This API lets a client find the context of an event. This is designed primarily to investigate abuse reports. + +``` +GET /_synapse/admin/v1/rooms/<room_id>/context/<event_id> +``` + +This API mimmicks [GET /_matrix/client/r0/rooms/{roomId}/context/{eventId}](https://matrix.org/docs/spec/client_server/r0.6.1#get-matrix-client-r0-rooms-roomid-context-eventid). Please refer to the link for all details on parameters and reseponse. + +Example response: + +```json +{ + "end": "t29-57_2_0_2", + "events_after": [ + { + "content": { + "body": "This is an example text message", + "msgtype": "m.text", + "format": "org.matrix.custom.html", + "formatted_body": "<b>This is an example text message</b>" + }, + "type": "m.room.message", + "event_id": "$143273582443PhrSn:example.org", + "room_id": "!636q39766251:example.com", + "sender": "@example:example.org", + "origin_server_ts": 1432735824653, + "unsigned": { + "age": 1234 + } + } + ], + "event": { + "content": { + "body": "filename.jpg", + "info": { + "h": 398, + "w": 394, + "mimetype": "image/jpeg", + "size": 31037 + }, + "url": "mxc://example.org/JWEIFJgwEIhweiWJE", + "msgtype": "m.image" + }, + "type": "m.room.message", + "event_id": "$f3h4d129462ha:example.com", + "room_id": "!636q39766251:example.com", + "sender": "@example:example.org", + "origin_server_ts": 1432735824653, + "unsigned": { + "age": 1234 + } + }, + "events_before": [ + { + "content": { + "body": "something-important.doc", + "filename": "something-important.doc", + "info": { + "mimetype": "application/msword", + "size": 46144 + }, + "msgtype": "m.file", + "url": "mxc://example.org/FHyPlCeYUSFFxlgbQYZmoEoe" + }, + "type": "m.room.message", + "event_id": "$143273582443PhrSn:example.org", + "room_id": "!636q39766251:example.com", + "sender": "@example:example.org", + "origin_server_ts": 1432735824653, + "unsigned": { + "age": 1234 + } + } + ], + "start": "t27-54_2_0_2", + "state": [ + { + "content": { + "creator": "@example:example.org", + "room_version": "1", + "m.federate": true, + "predecessor": { + "event_id": "$something:example.org", + "room_id": "!oldroom:example.org" + } + }, + "type": "m.room.create", + "event_id": "$143273582443PhrSn:example.org", + "room_id": "!636q39766251:example.com", + "sender": "@example:example.org", + "origin_server_ts": 1432735824653, + "unsigned": { + "age": 1234 + }, + "state_key": "" + }, + { + "content": { + "membership": "join", + "avatar_url": "mxc://example.org/SEsfnsuifSDFSSEF", + "displayname": "Alice Margatroid" + }, + "type": "m.room.member", + "event_id": "$143273582443PhrSn:example.org", + "room_id": "!636q39766251:example.com", + "sender": "@example:example.org", + "origin_server_ts": 1432735824653, + "unsigned": { + "age": 1234 + }, + "state_key": "@alice:example.org" + } + ] +} +``` diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py index 07b2187eb1..1336a23a3a 100644 --- a/synapse/handlers/room.py +++ b/synapse/handlers/room.py @@ -38,6 +38,7 @@ from synapse.api.filtering import Filter from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersion from synapse.events import EventBase from synapse.events.utils import copy_power_levels_contents +from synapse.rest.admin._base import assert_user_is_admin from synapse.storage.state import StateFilter from synapse.types import ( JsonDict, @@ -1004,41 +1005,51 @@ class RoomCreationHandler(BaseHandler): class RoomContextHandler: def __init__(self, hs: "HomeServer"): self.hs = hs + self.auth = hs.get_auth() self.store = hs.get_datastore() self.storage = hs.get_storage() self.state_store = self.storage.state async def get_event_context( self, - user: UserID, + requester: Requester, room_id: str, event_id: str, limit: int, event_filter: Optional[Filter], + use_admin_priviledge: bool = False, ) -> Optional[JsonDict]: """Retrieves events, pagination tokens and state around a given event in a room. Args: - user + requester room_id event_id limit: The maximum number of events to return in total (excluding state). event_filter: the filter to apply to the events returned (excluding the target event_id) - + use_admin_priviledge: if `True`, return all events, regardless + of whether `user` has access to them. To be used **ONLY** + from the admin API. Returns: dict, or None if the event isn't found """ + user = requester.user + if use_admin_priviledge: + await assert_user_is_admin(self.auth, requester.user) + before_limit = math.floor(limit / 2.0) after_limit = limit - before_limit users = await self.store.get_users_in_room(room_id) is_peeking = user.to_string() not in users - def filter_evts(events): - return filter_events_for_client( + async def filter_evts(events): + if use_admin_priviledge: + return events + return await filter_events_for_client( self.storage, user.to_string(), events, is_peeking=is_peeking ) diff --git a/synapse/rest/admin/__init__.py b/synapse/rest/admin/__init__.py index f5c5d164f9..8457db1e22 100644 --- a/synapse/rest/admin/__init__.py +++ b/synapse/rest/admin/__init__.py @@ -42,6 +42,7 @@ from synapse.rest.admin.rooms import ( JoinRoomAliasServlet, ListRoomRestServlet, MakeRoomAdminRestServlet, + RoomEventContextServlet, RoomMembersRestServlet, RoomRestServlet, RoomStateRestServlet, @@ -238,6 +239,7 @@ def register_servlets(hs, http_server): MakeRoomAdminRestServlet(hs).register(http_server) ShadowBanRestServlet(hs).register(http_server) ForwardExtremitiesRestServlet(hs).register(http_server) + RoomEventContextServlet(hs).register(http_server) def register_servlets_for_client_rest_resource(hs, http_server): diff --git a/synapse/rest/admin/rooms.py b/synapse/rest/admin/rooms.py index 3e57e6a4d0..491f9ca095 100644 --- a/synapse/rest/admin/rooms.py +++ b/synapse/rest/admin/rooms.py @@ -15,9 +15,11 @@ import logging from http import HTTPStatus from typing import TYPE_CHECKING, List, Optional, Tuple +from urllib import parse as urlparse from synapse.api.constants import EventTypes, JoinRules, Membership from synapse.api.errors import AuthError, Codes, NotFoundError, SynapseError +from synapse.api.filtering import Filter from synapse.http.servlet import ( RestServlet, assert_params_in_dict, @@ -33,6 +35,7 @@ from synapse.rest.admin._base import ( ) from synapse.storage.databases.main.room import RoomSortOrder from synapse.types import JsonDict, RoomAlias, RoomID, UserID, create_requester +from synapse.util import json_decoder if TYPE_CHECKING: from synapse.server import HomeServer @@ -605,3 +608,65 @@ class ForwardExtremitiesRestServlet(RestServlet): extremities = await self.store.get_forward_extremities_for_room(room_id) return 200, {"count": len(extremities), "results": extremities} + + +class RoomEventContextServlet(RestServlet): + """ + Provide the context for an event. + This API is designed to be used when system administrators wish to look at + an abuse report and understand what happened during and immediately prior + to this event. + """ + + PATTERNS = admin_patterns("/rooms/(?P<room_id>[^/]*)/context/(?P<event_id>[^/]*)$") + + def __init__(self, hs): + super().__init__() + self.clock = hs.get_clock() + self.room_context_handler = hs.get_room_context_handler() + self._event_serializer = hs.get_event_client_serializer() + self.auth = hs.get_auth() + + async def on_GET(self, request, room_id, event_id): + requester = await self.auth.get_user_by_req(request, allow_guest=False) + await assert_user_is_admin(self.auth, requester.user) + + limit = parse_integer(request, "limit", default=10) + + # picking the API shape for symmetry with /messages + filter_str = parse_string(request, b"filter", encoding="utf-8") + if filter_str: + filter_json = urlparse.unquote(filter_str) + event_filter = Filter( + json_decoder.decode(filter_json) + ) # type: Optional[Filter] + else: + event_filter = None + + results = await self.room_context_handler.get_event_context( + requester, + room_id, + event_id, + limit, + event_filter, + use_admin_priviledge=True, + ) + + if not results: + raise SynapseError(404, "Event not found.", errcode=Codes.NOT_FOUND) + + time_now = self.clock.time_msec() + results["events_before"] = await self._event_serializer.serialize_events( + results["events_before"], time_now + ) + results["event"] = await self._event_serializer.serialize_event( + results["event"], time_now + ) + results["events_after"] = await self._event_serializer.serialize_events( + results["events_after"], time_now + ) + results["state"] = await self._event_serializer.serialize_events( + results["state"], time_now + ) + + return 200, results diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py index f95627ee61..90fd98c53e 100644 --- a/synapse/rest/client/v1/room.py +++ b/synapse/rest/client/v1/room.py @@ -650,7 +650,7 @@ class RoomEventContextServlet(RestServlet): event_filter = None results = await self.room_context_handler.get_event_context( - requester.user, room_id, event_id, limit, event_filter + requester, room_id, event_id, limit, event_filter ) if not results: diff --git a/synapse/visibility.py b/synapse/visibility.py index 4a5df293a4..e39d02602a 100644 --- a/synapse/visibility.py +++ b/synapse/visibility.py @@ -80,6 +80,7 @@ async def filter_events_for_client( events = [e for e in events if not e.internal_metadata.is_soft_failed()] types = ((EventTypes.RoomHistoryVisibility, ""), (EventTypes.Member, user_id)) + event_id_to_state = await storage.state.get_state_for_events( frozenset(e.event_id for e in events), state_filter=StateFilter.from_types(types), diff --git a/tests/rest/admin/test_room.py b/tests/rest/admin/test_room.py index 7c47aa7e0a..2a217b1ce0 100644 --- a/tests/rest/admin/test_room.py +++ b/tests/rest/admin/test_room.py @@ -1445,6 +1445,90 @@ class JoinAliasRoomTestCase(unittest.HomeserverTestCase): self.assertEquals(200, int(channel.result["code"]), msg=channel.result["body"]) self.assertEqual(private_room_id, channel.json_body["joined_rooms"][0]) + def test_context_as_non_admin(self): + """ + Test that, without being admin, one cannot use the context admin API + """ + # Create a room. + user_id = self.register_user("test", "test") + user_tok = self.login("test", "test") + + self.register_user("test_2", "test") + user_tok_2 = self.login("test_2", "test") + + room_id = self.helper.create_room_as(user_id, tok=user_tok) + + # Populate the room with events. + events = [] + for i in range(30): + events.append( + self.helper.send_event( + room_id, "com.example.test", content={"index": i}, tok=user_tok + ) + ) + + # Now attempt to find the context using the admin API without being admin. + midway = (len(events) - 1) // 2 + for tok in [user_tok, user_tok_2]: + channel = self.make_request( + "GET", + "/_synapse/admin/v1/rooms/%s/context/%s" + % (room_id, events[midway]["event_id"]), + access_token=tok, + ) + self.assertEquals( + 403, int(channel.result["code"]), msg=channel.result["body"] + ) + self.assertEqual(Codes.FORBIDDEN, channel.json_body["errcode"]) + + def test_context_as_admin(self): + """ + Test that, as admin, we can find the context of an event without having joined the room. + """ + + # Create a room. We're not part of it. + user_id = self.register_user("test", "test") + user_tok = self.login("test", "test") + room_id = self.helper.create_room_as(user_id, tok=user_tok) + + # Populate the room with events. + events = [] + for i in range(30): + events.append( + self.helper.send_event( + room_id, "com.example.test", content={"index": i}, tok=user_tok + ) + ) + + # Now let's fetch the context for this room. + midway = (len(events) - 1) // 2 + channel = self.make_request( + "GET", + "/_synapse/admin/v1/rooms/%s/context/%s" + % (room_id, events[midway]["event_id"]), + access_token=self.admin_user_tok, + ) + self.assertEquals(200, int(channel.result["code"]), msg=channel.result["body"]) + self.assertEquals( + channel.json_body["event"]["event_id"], events[midway]["event_id"] + ) + + for i, found_event in enumerate(channel.json_body["events_before"]): + for j, posted_event in enumerate(events): + if found_event["event_id"] == posted_event["event_id"]: + self.assertTrue(j < midway) + break + else: + self.fail("Event %s from events_before not found" % j) + + for i, found_event in enumerate(channel.json_body["events_after"]): + for j, posted_event in enumerate(events): + if found_event["event_id"] == posted_event["event_id"]: + self.assertTrue(j > midway) + break + else: + self.fail("Event %s from events_after not found" % j) + class MakeRoomAdminTestCase(unittest.HomeserverTestCase): servlets = [ |