summary refs log tree commit diff
path: root/synapse/rest/admin/rooms.py
blob: a2f4edebb8508fe31c997e7d2970cd2a5deb2d0d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
# Copyright 2019-2021 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
from http import HTTPStatus
from typing import TYPE_CHECKING, List, Optional, Tuple, cast
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 (
    ResolveRoomIdMixin,
    RestServlet,
    assert_params_in_dict,
    parse_integer,
    parse_json_object_from_request,
    parse_string,
)
from synapse.http.site import SynapseRequest
from synapse.rest.admin._base import (
    admin_patterns,
    assert_requester_is_admin,
    assert_user_is_admin,
)
from synapse.storage.databases.main.room import RoomSortOrder
from synapse.types import JsonDict, UserID, create_requester
from synapse.util import json_decoder

if TYPE_CHECKING:
    from synapse.api.auth import Auth
    from synapse.handlers.pagination import PaginationHandler
    from synapse.handlers.room import RoomShutdownHandler
    from synapse.server import HomeServer

logger = logging.getLogger(__name__)


class ListRoomRestServlet(RestServlet):
    """
    List all rooms that are known to the homeserver. Results are returned
    in a dictionary containing room information. Supports pagination.
    """

    PATTERNS = admin_patterns("/rooms$")

    def __init__(self, hs: "HomeServer"):
        self.store = hs.get_datastore()
        self.auth = hs.get_auth()
        self.admin_handler = hs.get_admin_handler()

    async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
        requester = await self.auth.get_user_by_req(request)
        await assert_user_is_admin(self.auth, requester.user)

        # Extract query parameters
        start = parse_integer(request, "from", default=0)
        limit = parse_integer(request, "limit", default=100)
        order_by = parse_string(request, "order_by", default=RoomSortOrder.NAME.value)
        if order_by not in (
            RoomSortOrder.ALPHABETICAL.value,
            RoomSortOrder.SIZE.value,
            RoomSortOrder.NAME.value,
            RoomSortOrder.CANONICAL_ALIAS.value,
            RoomSortOrder.JOINED_MEMBERS.value,
            RoomSortOrder.JOINED_LOCAL_MEMBERS.value,
            RoomSortOrder.VERSION.value,
            RoomSortOrder.CREATOR.value,
            RoomSortOrder.ENCRYPTION.value,
            RoomSortOrder.FEDERATABLE.value,
            RoomSortOrder.PUBLIC.value,
            RoomSortOrder.JOIN_RULES.value,
            RoomSortOrder.GUEST_ACCESS.value,
            RoomSortOrder.HISTORY_VISIBILITY.value,
            RoomSortOrder.STATE_EVENTS.value,
        ):
            raise SynapseError(
                400,
                "Unknown value for order_by: %s" % (order_by,),
                errcode=Codes.INVALID_PARAM,
            )

        search_term = parse_string(request, "search_term", encoding="utf-8")
        if search_term == "":
            raise SynapseError(
                400,
                "search_term cannot be an empty string",
                errcode=Codes.INVALID_PARAM,
            )

        direction = parse_string(request, "dir", default="f")
        if direction not in ("f", "b"):
            raise SynapseError(
                400, "Unknown direction: %s" % (direction,), errcode=Codes.INVALID_PARAM
            )

        reverse_order = True if direction == "b" else False

        # Return list of rooms according to parameters
        rooms, total_rooms = await self.store.get_rooms_paginate(
            start, limit, order_by, reverse_order, search_term
        )
        response = {
            # next_token should be opaque, so return a value the client can parse
            "offset": start,
            "rooms": rooms,
            "total_rooms": total_rooms,
        }

        # Are there more rooms to paginate through after this?
        if (start + limit) < total_rooms:
            # There are. Calculate where the query should start from next time
            # to get the next part of the list
            response["next_batch"] = start + limit

        # Is it possible to paginate backwards? Check if we currently have an
        # offset
        if start > 0:
            if start > limit:
                # Going back one iteration won't take us to the start.
                # Calculate new offset
                response["prev_batch"] = start - limit
            else:
                response["prev_batch"] = 0

        return 200, response


class RoomRestServlet(RestServlet):
    """Manage a room.

    On GET : Get details of a room.

    On DELETE : Delete a room from server.

    It is a combination and improvement of shutdown and purge room.

    Shuts down a room by removing all local users from the room.
    Blocking all future invites and joins to the room is optional.

    If desired any local aliases will be repointed to a new room
    created by `new_room_user_id` and kicked users will be auto-
    joined to the new room.

    If 'purge' is true, it will remove all traces of a room from the database.

    TODO: Add on_POST to allow room creation without joining the room
    """

    PATTERNS = admin_patterns("/rooms/(?P<room_id>[^/]+)$")

    def __init__(self, hs: "HomeServer"):
        self.hs = hs
        self.auth = hs.get_auth()
        self.store = hs.get_datastore()
        self.room_shutdown_handler = hs.get_room_shutdown_handler()
        self.pagination_handler = hs.get_pagination_handler()

    async def on_GET(
        self, request: SynapseRequest, room_id: str
    ) -> Tuple[int, JsonDict]:
        await assert_requester_is_admin(self.auth, request)

        ret = await self.store.get_room_with_stats(room_id)
        if not ret:
            raise NotFoundError("Room not found")

        members = await self.store.get_users_in_room(room_id)
        ret["joined_local_devices"] = await self.store.count_devices_by_users(members)

        return 200, ret

    async def on_DELETE(
        self, request: SynapseRequest, room_id: str
    ) -> Tuple[int, JsonDict]:
        return await self._delete_room(
            request,
            room_id,
            self.auth,
            self.room_shutdown_handler,
            self.pagination_handler,
        )

    async def _delete_room(
        self,
        request: SynapseRequest,
        room_id: str,
        auth: "Auth",
        room_shutdown_handler: "RoomShutdownHandler",
        pagination_handler: "PaginationHandler",
    ) -> Tuple[int, JsonDict]:
        requester = await auth.get_user_by_req(request)
        await assert_user_is_admin(auth, requester.user)

        content = parse_json_object_from_request(request)

        block = content.get("block", False)
        if not isinstance(block, bool):
            raise SynapseError(
                HTTPStatus.BAD_REQUEST,
                "Param 'block' must be a boolean, if given",
                Codes.BAD_JSON,
            )

        purge = content.get("purge", True)
        if not isinstance(purge, bool):
            raise SynapseError(
                HTTPStatus.BAD_REQUEST,
                "Param 'purge' must be a boolean, if given",
                Codes.BAD_JSON,
            )

        force_purge = content.get("force_purge", False)
        if not isinstance(force_purge, bool):
            raise SynapseError(
                HTTPStatus.BAD_REQUEST,
                "Param 'force_purge' must be a boolean, if given",
                Codes.BAD_JSON,
            )

        ret = await room_shutdown_handler.shutdown_room(
            room_id=room_id,
            new_room_user_id=content.get("new_room_user_id"),
            new_room_name=content.get("room_name"),
            message=content.get("message"),
            requester_user_id=requester.user.to_string(),
            block=block,
        )

        # Purge room
        if purge:
            try:
                await pagination_handler.purge_room(room_id, force=force_purge)
            except NotFoundError:
                if block:
                    # We can block unknown rooms with this endpoint, in which case
                    # a failed purge is expected.
                    pass
                else:
                    # But otherwise, we expect this purge to have succeeded.
                    raise

        # Cast safety: cast away the knowledge that this is a TypedDict.
        # See https://github.com/python/mypy/issues/4976#issuecomment-579883622
        # for some discussion on why this is necessary. Either way,
        # `ret` is an opaque dictionary blob as far as the rest of the app cares.
        return 200, cast(JsonDict, ret)


class RoomMembersRestServlet(RestServlet):
    """
    Get members list of a room.
    """

    PATTERNS = admin_patterns("/rooms/(?P<room_id>[^/]+)/members")

    def __init__(self, hs: "HomeServer"):
        self.hs = hs
        self.auth = hs.get_auth()
        self.store = hs.get_datastore()

    async def on_GET(
        self, request: SynapseRequest, room_id: str
    ) -> Tuple[int, JsonDict]:
        await assert_requester_is_admin(self.auth, request)

        ret = await self.store.get_room(room_id)
        if not ret:
            raise NotFoundError("Room not found")

        members = await self.store.get_users_in_room(room_id)
        ret = {"members": members, "total": len(members)}

        return 200, ret


class RoomStateRestServlet(RestServlet):
    """
    Get full state within a room.
    """

    PATTERNS = admin_patterns("/rooms/(?P<room_id>[^/]+)/state")

    def __init__(self, hs: "HomeServer"):
        self.hs = hs
        self.auth = hs.get_auth()
        self.store = hs.get_datastore()
        self.clock = hs.get_clock()
        self._event_serializer = hs.get_event_client_serializer()

    async def on_GET(
        self, request: SynapseRequest, room_id: str
    ) -> Tuple[int, JsonDict]:
        requester = await self.auth.get_user_by_req(request)
        await assert_user_is_admin(self.auth, requester.user)

        ret = await self.store.get_room(room_id)
        if not ret:
            raise NotFoundError("Room not found")

        event_ids = await self.store.get_current_state_ids(room_id)
        events = await self.store.get_events(event_ids.values())
        now = self.clock.time_msec()
        room_state = await self._event_serializer.serialize_events(
            events.values(),
            now,
            # We don't bother bundling aggregations in when asked for state
            # events, as clients won't use them.
            bundle_aggregations=False,
        )
        ret = {"state": room_state}

        return 200, ret


class JoinRoomAliasServlet(ResolveRoomIdMixin, RestServlet):

    PATTERNS = admin_patterns("/join/(?P<room_identifier>[^/]*)")

    def __init__(self, hs: "HomeServer"):
        super().__init__(hs)
        self.hs = hs
        self.auth = hs.get_auth()
        self.admin_handler = hs.get_admin_handler()
        self.state_handler = hs.get_state_handler()

    async def on_POST(
        self, request: SynapseRequest, room_identifier: str
    ) -> Tuple[int, JsonDict]:
        # This will always be set by the time Twisted calls us.
        assert request.args is not None

        requester = await self.auth.get_user_by_req(request)
        await assert_user_is_admin(self.auth, requester.user)

        content = parse_json_object_from_request(request)

        assert_params_in_dict(content, ["user_id"])
        target_user = UserID.from_string(content["user_id"])

        if not self.hs.is_mine(target_user):
            raise SynapseError(400, "This endpoint can only be used with local users")

        if not await self.admin_handler.get_user(target_user):
            raise NotFoundError("User not found")

        # Get the room ID from the identifier.
        try:
            remote_room_hosts: Optional[List[str]] = [
                x.decode("ascii") for x in request.args[b"server_name"]
            ]
        except Exception:
            remote_room_hosts = None
        room_id, remote_room_hosts = await self.resolve_room_id(
            room_identifier, remote_room_hosts
        )

        fake_requester = create_requester(
            target_user, authenticated_entity=requester.authenticated_entity
        )

        # send invite if room has "JoinRules.INVITE"
        room_state = await self.state_handler.get_current_state(room_id)
        join_rules_event = room_state.get((EventTypes.JoinRules, ""))
        if join_rules_event:
            if not (join_rules_event.content.get("join_rule") == JoinRules.PUBLIC):
                # update_membership with an action of "invite" can raise a
                # ShadowBanError. This is not handled since it is assumed that
                # an admin isn't going to call this API with a shadow-banned user.
                await self.room_member_handler.update_membership(
                    requester=requester,
                    target=fake_requester.user,
                    room_id=room_id,
                    action="invite",
                    remote_room_hosts=remote_room_hosts,
                    ratelimit=False,
                )

        await self.room_member_handler.update_membership(
            requester=fake_requester,
            target=fake_requester.user,
            room_id=room_id,
            action="join",
            remote_room_hosts=remote_room_hosts,
            ratelimit=False,
        )

        return 200, {"room_id": room_id}


class MakeRoomAdminRestServlet(ResolveRoomIdMixin, RestServlet):
    """Allows a server admin to get power in a room if a local user has power in
    a room. Will also invite the user if they're not in the room and it's a
    private room. Can specify another user (rather than the admin user) to be
    granted power, e.g.:

        POST/_synapse/admin/v1/rooms/<room_id_or_alias>/make_room_admin
        {
            "user_id": "@foo:example.com"
        }
    """

    PATTERNS = admin_patterns("/rooms/(?P<room_identifier>[^/]*)/make_room_admin")

    def __init__(self, hs: "HomeServer"):
        super().__init__(hs)
        self.hs = hs
        self.auth = hs.get_auth()
        self.store = hs.get_datastore()
        self.event_creation_handler = hs.get_event_creation_handler()
        self.state_handler = hs.get_state_handler()
        self.is_mine_id = hs.is_mine_id

    async def on_POST(
        self, request: SynapseRequest, room_identifier: str
    ) -> Tuple[int, JsonDict]:
        requester = await self.auth.get_user_by_req(request)
        await assert_user_is_admin(self.auth, requester.user)
        content = parse_json_object_from_request(request, allow_empty_body=True)

        room_id, _ = await self.resolve_room_id(room_identifier)

        # Which user to grant room admin rights to.
        user_to_add = content.get("user_id", requester.user.to_string())

        # Figure out which local users currently have power in the room, if any.
        room_state = await self.state_handler.get_current_state(room_id)
        if not room_state:
            raise SynapseError(400, "Server not in room")

        create_event = room_state[(EventTypes.Create, "")]
        power_levels = room_state.get((EventTypes.PowerLevels, ""))

        if power_levels is not None:
            # We pick the local user with the highest power.
            user_power = power_levels.content.get("users", {})
            admin_users = [
                user_id for user_id in user_power if self.is_mine_id(user_id)
            ]
            admin_users.sort(key=lambda user: user_power[user])

            if not admin_users:
                raise SynapseError(400, "No local admin user in room")

            admin_user_id = None

            for admin_user in reversed(admin_users):
                (
                    current_membership_type,
                    _,
                ) = await self.store.get_local_current_membership_for_user_in_room(
                    admin_user, room_id
                )
                if current_membership_type == "join":
                    admin_user_id = admin_user
                    break

            if not admin_user_id:
                raise SynapseError(
                    400,
                    "No local admin user in room",
                )

            pl_content = power_levels.content
        else:
            # If there is no power level events then the creator has rights.
            pl_content = {}
            admin_user_id = create_event.sender
            if not self.is_mine_id(admin_user_id):
                raise SynapseError(
                    400,
                    "No local admin user in room",
                )

        # Grant the user power equal to the room admin by attempting to send an
        # updated power level event.
        new_pl_content = dict(pl_content)
        new_pl_content["users"] = dict(pl_content.get("users", {}))
        new_pl_content["users"][user_to_add] = new_pl_content["users"][admin_user_id]

        fake_requester = create_requester(
            admin_user_id,
            authenticated_entity=requester.authenticated_entity,
        )

        try:
            await self.event_creation_handler.create_and_send_nonmember_event(
                fake_requester,
                event_dict={
                    "content": new_pl_content,
                    "sender": admin_user_id,
                    "type": EventTypes.PowerLevels,
                    "state_key": "",
                    "room_id": room_id,
                },
            )
        except AuthError:
            # The admin user we found turned out not to have enough power.
            raise SynapseError(
                400, "No local admin user in room with power to update power levels."
            )

        # Now we check if the user we're granting admin rights to is already in
        # the room. If not and it's not a public room we invite them.
        member_event = room_state.get((EventTypes.Member, user_to_add))
        is_joined = False
        if member_event:
            is_joined = member_event.content["membership"] in (
                Membership.JOIN,
                Membership.INVITE,
            )

        if is_joined:
            return 200, {}

        join_rules = room_state.get((EventTypes.JoinRules, ""))
        is_public = False
        if join_rules:
            is_public = join_rules.content.get("join_rule") == JoinRules.PUBLIC

        if is_public:
            return 200, {}

        await self.room_member_handler.update_membership(
            fake_requester,
            target=UserID.from_string(user_to_add),
            room_id=room_id,
            action=Membership.INVITE,
        )

        return 200, {}


class ForwardExtremitiesRestServlet(ResolveRoomIdMixin, 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"):
        super().__init__(hs)
        self.hs = hs
        self.auth = hs.get_auth()
        self.store = hs.get_datastore()

    async def on_DELETE(
        self, request: SynapseRequest, room_identifier: str
    ) -> Tuple[int, JsonDict]:
        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)

        deleted_count = await self.store.delete_forward_extremities_for_room(room_id)
        return 200, {"deleted": deleted_count}

    async def on_GET(
        self, request: SynapseRequest, room_identifier: str
    ) -> Tuple[int, JsonDict]:
        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)

        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: "HomeServer"):
        super().__init__()
        self._hs = hs
        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: SynapseRequest, room_id: str, event_id: str
    ) -> Tuple[int, JsonDict]:
        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, "filter", encoding="utf-8")
        if filter_str:
            filter_json = urlparse.unquote(filter_str)
            event_filter: Optional[Filter] = Filter(
                self._hs, json_decoder.decode(filter_json)
            )
        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,
            # No need to bundle aggregations for state events
            bundle_aggregations=False,
        )

        return 200, results