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
|
// Copyright 2017 Vector Creations Ltd
//
// 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.
package routing
import (
"encoding/json"
"fmt"
"net/http"
"strings"
"time"
appserviceAPI "github.com/matrix-org/dendrite/appservice/api"
roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
roomserverVersion "github.com/matrix-org/dendrite/roomserver/version"
"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
"github.com/matrix-org/dendrite/clientapi/auth/storage/accounts"
"github.com/matrix-org/dendrite/clientapi/httputil"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
"github.com/matrix-org/dendrite/clientapi/producers"
"github.com/matrix-org/dendrite/clientapi/threepid"
"github.com/matrix-org/dendrite/common"
"github.com/matrix-org/dendrite/common/config"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
log "github.com/sirupsen/logrus"
)
// https://matrix.org/docs/spec/client_server/r0.2.0.html#post-matrix-client-r0-createroom
type createRoomRequest struct {
Invite []string `json:"invite"`
Name string `json:"name"`
Visibility string `json:"visibility"`
Topic string `json:"topic"`
Preset string `json:"preset"`
CreationContent map[string]interface{} `json:"creation_content"`
InitialState []fledglingEvent `json:"initial_state"`
RoomAliasName string `json:"room_alias_name"`
GuestCanJoin bool `json:"guest_can_join"`
RoomVersion gomatrixserverlib.RoomVersion `json:"room_version"`
}
const (
presetPrivateChat = "private_chat"
presetTrustedPrivateChat = "trusted_private_chat"
presetPublicChat = "public_chat"
)
const (
historyVisibilityShared = "shared"
// TODO: These should be implemented once history visibility is implemented
// historyVisibilityWorldReadable = "world_readable"
// historyVisibilityInvited = "invited"
)
func (r createRoomRequest) Validate() *util.JSONResponse {
whitespace := "\t\n\x0b\x0c\r " // https://docs.python.org/2/library/string.html#string.whitespace
// https://github.com/matrix-org/synapse/blob/v0.19.2/synapse/handlers/room.py#L81
// Synapse doesn't check for ':' but we will else it will break parsers badly which split things into 2 segments.
if strings.ContainsAny(r.RoomAliasName, whitespace+":") {
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON("room_alias_name cannot contain whitespace or ':'"),
}
}
for _, userID := range r.Invite {
// TODO: We should put user ID parsing code into gomatrixserverlib and use that instead
// (see https://github.com/matrix-org/gomatrixserverlib/blob/3394e7c7003312043208aa73727d2256eea3d1f6/eventcontent.go#L347 )
// It should be a struct (with pointers into a single string to avoid copying) and
// we should update all refs to use UserID types rather than strings.
// https://github.com/matrix-org/synapse/blob/v0.19.2/synapse/types.py#L92
if _, _, err := gomatrixserverlib.SplitID('@', userID); err != nil {
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON("user id must be in the form @localpart:domain"),
}
}
}
switch r.Preset {
case presetPrivateChat, presetTrustedPrivateChat, presetPublicChat, "":
default:
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON("preset must be any of 'private_chat', 'trusted_private_chat', 'public_chat'"),
}
}
// Validate creation_content fields defined in the spec by marshalling the
// creation_content map into bytes and then unmarshalling the bytes into
// common.CreateContent.
creationContentBytes, err := json.Marshal(r.CreationContent)
if err != nil {
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON("malformed creation_content"),
}
}
var CreationContent gomatrixserverlib.CreateContent
err = json.Unmarshal(creationContentBytes, &CreationContent)
if err != nil {
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON("malformed creation_content"),
}
}
return nil
}
// https://matrix.org/docs/spec/client_server/r0.2.0.html#post-matrix-client-r0-createroom
type createRoomResponse struct {
RoomID string `json:"room_id"`
RoomAlias string `json:"room_alias,omitempty"` // in synapse not spec
}
// fledglingEvent is a helper representation of an event used when creating many events in succession.
type fledglingEvent struct {
Type string `json:"type"`
StateKey string `json:"state_key"`
Content interface{} `json:"content"`
}
// CreateRoom implements /createRoom
func CreateRoom(
req *http.Request, device *authtypes.Device,
cfg *config.Dendrite, producer *producers.RoomserverProducer,
accountDB accounts.Database, rsAPI roomserverAPI.RoomserverInternalAPI,
asAPI appserviceAPI.AppServiceQueryAPI,
) util.JSONResponse {
// TODO (#267): Check room ID doesn't clash with an existing one, and we
// probably shouldn't be using pseudo-random strings, maybe GUIDs?
roomID := fmt.Sprintf("!%s:%s", util.RandomString(16), cfg.Matrix.ServerName)
return createRoom(req, device, cfg, roomID, producer, accountDB, rsAPI, asAPI)
}
// createRoom implements /createRoom
// nolint: gocyclo
func createRoom(
req *http.Request, device *authtypes.Device,
cfg *config.Dendrite, roomID string, producer *producers.RoomserverProducer,
accountDB accounts.Database, rsAPI roomserverAPI.RoomserverInternalAPI,
asAPI appserviceAPI.AppServiceQueryAPI,
) util.JSONResponse {
logger := util.GetLogger(req.Context())
userID := device.UserID
var r createRoomRequest
resErr := httputil.UnmarshalJSONRequest(req, &r)
if resErr != nil {
return *resErr
}
// TODO: apply rate-limit
if resErr = r.Validate(); resErr != nil {
return *resErr
}
evTime, err := httputil.ParseTSParam(req)
if err != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.InvalidArgumentValue(err.Error()),
}
}
// Clobber keys: creator, room_version
if r.CreationContent == nil {
r.CreationContent = make(map[string]interface{}, 2)
}
r.CreationContent["creator"] = userID
roomVersion := roomserverVersion.DefaultRoomVersion()
if r.RoomVersion != "" {
candidateVersion := gomatrixserverlib.RoomVersion(r.RoomVersion)
_, roomVersionError := roomserverVersion.SupportedRoomVersion(candidateVersion)
if roomVersionError != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.UnsupportedRoomVersion(roomVersionError.Error()),
}
}
roomVersion = candidateVersion
}
r.CreationContent["room_version"] = roomVersion
// TODO: visibility/presets/raw initial state
// TODO: Create room alias association
// Make sure this doesn't fall into an application service's namespace though!
logger.WithFields(log.Fields{
"userID": userID,
"roomID": roomID,
"roomVersion": r.CreationContent["room_version"],
}).Info("Creating new room")
profile, err := appserviceAPI.RetrieveUserProfile(req.Context(), userID, asAPI, accountDB)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("appserviceAPI.RetrieveUserProfile failed")
return jsonerror.InternalServerError()
}
membershipContent := gomatrixserverlib.MemberContent{
Membership: gomatrixserverlib.Join,
DisplayName: profile.DisplayName,
AvatarURL: profile.AvatarURL,
}
var joinRules, historyVisibility string
switch r.Preset {
case presetPrivateChat:
joinRules = gomatrixserverlib.Invite
historyVisibility = historyVisibilityShared
case presetTrustedPrivateChat:
joinRules = gomatrixserverlib.Invite
historyVisibility = historyVisibilityShared
// TODO If trusted_private_chat, all invitees are given the same power level as the room creator.
case presetPublicChat:
joinRules = gomatrixserverlib.Public
historyVisibility = historyVisibilityShared
default:
// Default room rules, r.Preset was previously checked for valid values so
// only a request with no preset should end up here.
joinRules = gomatrixserverlib.Invite
historyVisibility = historyVisibilityShared
}
var builtEvents []gomatrixserverlib.HeaderedEvent
// send events into the room in order of:
// 1- m.room.create
// 2- room creator join member
// 3- m.room.power_levels
// 4- m.room.canonical_alias (opt) TODO
// 5- m.room.join_rules
// 6- m.room.history_visibility
// 7- m.room.guest_access (opt)
// 8- other initial state items
// 9- m.room.name (opt)
// 10- m.room.topic (opt)
// 11- invite events (opt) - with is_direct flag if applicable TODO
// 12- 3pid invite events (opt) TODO
// 13- m.room.aliases event for HS (if alias specified) TODO
// This differs from Synapse slightly. Synapse would vary the ordering of 3-7
// depending on if those events were in "initial_state" or not. This made it
// harder to reason about, hence sticking to a strict static ordering.
// TODO: Synapse has txn/token ID on each event. Do we need to do this here?
eventsToMake := []fledglingEvent{
{"m.room.create", "", r.CreationContent},
{"m.room.member", userID, membershipContent},
{"m.room.power_levels", "", common.InitialPowerLevelsContent(userID)},
// TODO: m.room.canonical_alias
{"m.room.join_rules", "", gomatrixserverlib.JoinRuleContent{JoinRule: joinRules}},
{"m.room.history_visibility", "", common.HistoryVisibilityContent{HistoryVisibility: historyVisibility}},
}
if r.GuestCanJoin {
eventsToMake = append(eventsToMake, fledglingEvent{"m.room.guest_access", "", common.GuestAccessContent{GuestAccess: "can_join"}})
}
eventsToMake = append(eventsToMake, r.InitialState...)
if r.Name != "" {
eventsToMake = append(eventsToMake, fledglingEvent{"m.room.name", "", common.NameContent{Name: r.Name}})
}
if r.Topic != "" {
eventsToMake = append(eventsToMake, fledglingEvent{"m.room.topic", "", common.TopicContent{Topic: r.Topic}})
}
// TODO: invite events
// TODO: 3pid invite events
// TODO: m.room.aliases
authEvents := gomatrixserverlib.NewAuthEvents(nil)
for i, e := range eventsToMake {
depth := i + 1 // depth starts at 1
builder := gomatrixserverlib.EventBuilder{
Sender: userID,
RoomID: roomID,
Type: e.Type,
StateKey: &e.StateKey,
Depth: int64(depth),
}
err = builder.SetContent(e.Content)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("builder.SetContent failed")
return jsonerror.InternalServerError()
}
if i > 0 {
builder.PrevEvents = []gomatrixserverlib.EventReference{builtEvents[i-1].EventReference()}
}
var ev *gomatrixserverlib.Event
ev, err = buildEvent(&builder, &authEvents, cfg, evTime, roomVersion)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("buildEvent failed")
return jsonerror.InternalServerError()
}
if err = gomatrixserverlib.Allowed(*ev, &authEvents); err != nil {
util.GetLogger(req.Context()).WithError(err).Error("gomatrixserverlib.Allowed failed")
return jsonerror.InternalServerError()
}
// Add the event to the list of auth events
builtEvents = append(builtEvents, (*ev).Headered(roomVersion))
err = authEvents.AddEvent(ev)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("authEvents.AddEvent failed")
return jsonerror.InternalServerError()
}
}
// send events to the room server
_, err = producer.SendEvents(req.Context(), builtEvents, cfg.Matrix.ServerName, nil)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("producer.SendEvents failed")
return jsonerror.InternalServerError()
}
// TODO(#269): Reserve room alias while we create the room. This stops us
// from creating the room but still failing due to the alias having already
// been taken.
var roomAlias string
if r.RoomAliasName != "" {
roomAlias = fmt.Sprintf("#%s:%s", r.RoomAliasName, cfg.Matrix.ServerName)
aliasReq := roomserverAPI.SetRoomAliasRequest{
Alias: roomAlias,
RoomID: roomID,
UserID: userID,
}
var aliasResp roomserverAPI.SetRoomAliasResponse
err = rsAPI.SetRoomAlias(req.Context(), &aliasReq, &aliasResp)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("aliasAPI.SetRoomAlias failed")
return jsonerror.InternalServerError()
}
if aliasResp.AliasExists {
return util.MessageResponse(400, "Alias already exists")
}
}
// If this is a direct message then we should invite the participants.
for _, invitee := range r.Invite {
// Build the membership request.
body := threepid.MembershipRequest{
UserID: invitee,
}
// Build the invite event.
inviteEvent, err := buildMembershipEvent(
req.Context(), body, accountDB, device, gomatrixserverlib.Invite,
roomID, true, cfg, evTime, rsAPI, asAPI,
)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("buildMembershipEvent failed")
continue
}
// Build some stripped state for the invite.
candidates := append(gomatrixserverlib.UnwrapEventHeaders(builtEvents), *inviteEvent)
var strippedState []gomatrixserverlib.InviteV2StrippedState
for _, event := range candidates {
switch event.Type() {
// TODO: case gomatrixserverlib.MRoomEncryption:
// fallthrough
case gomatrixserverlib.MRoomMember:
fallthrough
case gomatrixserverlib.MRoomJoinRules:
strippedState = append(
strippedState,
gomatrixserverlib.NewInviteV2StrippedState(&event),
)
}
}
// Send the invite event to the roomserver.
if err = producer.SendInvite(
req.Context(),
inviteEvent.Headered(roomVersion),
strippedState, // invite room state
cfg.Matrix.ServerName, // send as server
nil, // transaction ID
); err != nil {
util.GetLogger(req.Context()).WithError(err).Error("producer.SendEvents failed")
return jsonerror.InternalServerError()
}
}
response := createRoomResponse{
RoomID: roomID,
RoomAlias: roomAlias,
}
return util.JSONResponse{
Code: 200,
JSON: response,
}
}
// buildEvent fills out auth_events for the builder then builds the event
func buildEvent(
builder *gomatrixserverlib.EventBuilder,
provider gomatrixserverlib.AuthEventProvider,
cfg *config.Dendrite,
evTime time.Time,
roomVersion gomatrixserverlib.RoomVersion,
) (*gomatrixserverlib.Event, error) {
eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(builder)
if err != nil {
return nil, err
}
refs, err := eventsNeeded.AuthEventReferences(provider)
if err != nil {
return nil, err
}
builder.AuthEvents = refs
event, err := builder.Build(
evTime, cfg.Matrix.ServerName, cfg.Matrix.KeyID,
cfg.Matrix.PrivateKey, roomVersion,
)
if err != nil {
return nil, fmt.Errorf("cannot build event %s : Builder failed to build. %w", builder.Type, err)
}
return &event, nil
}
|