summary refs log tree commit diff
path: root/synapse/rest/client/v2_alpha/sync.py
blob: b3d8001638aac93891a1ba6a260237dd47b9a73e (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
# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket 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.

from twisted.internet import defer

from synapse.http.servlet import (
    RestServlet, parse_string, parse_integer, parse_boolean
)
from synapse.handlers.sync import SyncConfig
from synapse.types import StreamToken
from synapse.events.utils import (
    serialize_event, format_event_for_client_v2_without_room_id,
)
from synapse.api.filtering import FilterCollection, DEFAULT_FILTER_COLLECTION
from synapse.api.errors import SynapseError
from synapse.api.constants import PresenceState
from ._base import client_v2_patterns

import copy
import itertools
import logging

import ujson as json

logger = logging.getLogger(__name__)


class SyncRestServlet(RestServlet):
    """

    GET parameters::
        timeout(int): How long to wait for new events in milliseconds.
        since(batch_token): Batch token when asking for incremental deltas.
        set_presence(str): What state the device presence should be set to.
            default is "online".
        filter(filter_id): A filter to apply to the events returned.

    Response JSON::
        {
          "next_batch": // batch token for the next /sync
          "presence": // presence data for the user.
          "rooms": {
            "join": { // Joined rooms being updated.
              "${room_id}": { // Id of the room being updated
                "event_map": // Map of EventID -> event JSON.
                "timeline": { // The recent events in the room if gap is "true"
                  "limited": // Was the per-room event limit exceeded?
                             // otherwise the next events in the room.
                  "events": [] // list of EventIDs in the "event_map".
                  "prev_batch": // back token for getting previous events.
                }
                "state": {"events": []} // list of EventIDs updating the
                                        // current state to be what it should
                                        // be at the end of the batch.
                "ephemeral": {"events": []} // list of event objects
              }
            },
            "invite": {}, // Invited rooms being updated.
            "leave": {} // Archived rooms being updated.
          }
        }
    """

    PATTERNS = client_v2_patterns("/sync$")
    ALLOWED_PRESENCE = set(["online", "offline"])

    def __init__(self, hs):
        super(SyncRestServlet, self).__init__()
        self.auth = hs.get_auth()
        self.sync_handler = hs.get_sync_handler()
        self.clock = hs.get_clock()
        self.filtering = hs.get_filtering()
        self.presence_handler = hs.get_presence_handler()

    @defer.inlineCallbacks
    def on_GET(self, request):
        if "from" in request.args:
            # /events used to use 'from', but /sync uses 'since'.
            # Lets be helpful and whine if we see a 'from'.
            raise SynapseError(
                400, "'from' is not a valid query parameter. Did you mean 'since'?"
            )

        requester = yield self.auth.get_user_by_req(
            request, allow_guest=True
        )
        user = requester.user
        device_id = requester.device_id

        timeout = parse_integer(request, "timeout", default=0)
        since = parse_string(request, "since")
        set_presence = parse_string(
            request, "set_presence", default="online",
            allowed_values=self.ALLOWED_PRESENCE
        )
        filter_id = parse_string(request, "filter", default=None)
        full_state = parse_boolean(request, "full_state", default=False)

        logger.info(
            "/sync: user=%r, timeout=%r, since=%r,"
            " set_presence=%r, filter_id=%r, device_id=%r" % (
                user, timeout, since, set_presence, filter_id, device_id
            )
        )

        request_key = (user, timeout, since, filter_id, full_state, device_id)

        if filter_id:
            if filter_id.startswith('{'):
                try:
                    filter_object = json.loads(filter_id)
                except:
                    raise SynapseError(400, "Invalid filter JSON")
                self.filtering.check_valid_filter(filter_object)
                filter = FilterCollection(filter_object)
            else:
                filter = yield self.filtering.get_user_filter(
                    user.localpart, filter_id
                )
        else:
            filter = DEFAULT_FILTER_COLLECTION

        sync_config = SyncConfig(
            user=user,
            filter_collection=filter,
            is_guest=requester.is_guest,
            request_key=request_key,
            device_id=device_id,
        )

        if since is not None:
            since_token = StreamToken.from_string(since)
        else:
            since_token = None

        affect_presence = set_presence != PresenceState.OFFLINE

        if affect_presence:
            yield self.presence_handler.set_state(user, {"presence": set_presence}, True)

        context = yield self.presence_handler.user_syncing(
            user.to_string(), affect_presence=affect_presence,
        )
        with context:
            sync_result = yield self.sync_handler.wait_for_sync_for_user(
                sync_config, since_token=since_token, timeout=timeout,
                full_state=full_state
            )

        time_now = self.clock.time_msec()

        joined = self.encode_joined(
            sync_result.joined, time_now, requester.access_token_id, filter.event_fields
        )

        invited = self.encode_invited(
            sync_result.invited, time_now, requester.access_token_id
        )

        archived = self.encode_archived(
            sync_result.archived, time_now, requester.access_token_id,
            filter.event_fields,
        )

        response_content = {
            "account_data": {"events": sync_result.account_data},
            "to_device": {"events": sync_result.to_device},
            "device_lists": {
                "changed": list(sync_result.device_lists),
            },
            "presence": self.encode_presence(
                sync_result.presence, time_now
            ),
            "rooms": {
                "join": joined,
                "invite": invited,
                "leave": archived,
            },
            "next_batch": sync_result.next_batch.to_string(),
        }

        defer.returnValue((200, response_content))

    def encode_presence(self, events, time_now):
        formatted = []
        for event in events:
            event = copy.deepcopy(event)
            event['sender'] = event['content'].pop('user_id')
            formatted.append(event)
        return {"events": formatted}

    def encode_joined(self, rooms, time_now, token_id, event_fields):
        """
        Encode the joined rooms in a sync result

        Args:
            rooms(list[synapse.handlers.sync.JoinedSyncResult]): list of sync
                results for rooms this user is joined to
            time_now(int): current time - used as a baseline for age
                calculations
            token_id(int): ID of the user's auth token - used for namespacing
                of transaction IDs
            event_fields(list<str>): List of event fields to include. If empty,
            all fields will be returned.
        Returns:
            dict[str, dict[str, object]]: the joined rooms list, in our
                response format
        """
        joined = {}
        for room in rooms:
            joined[room.room_id] = self.encode_room(
                room, time_now, token_id, only_fields=event_fields
            )

        return joined

    def encode_invited(self, rooms, time_now, token_id):
        """
        Encode the invited rooms in a sync result

        Args:
            rooms(list[synapse.handlers.sync.InvitedSyncResult]): list of
                sync results for rooms this user is joined to
            time_now(int): current time - used as a baseline for age
                calculations
            token_id(int): ID of the user's auth token - used for namespacing
            of transaction IDs

        Returns:
            dict[str, dict[str, object]]: the invited rooms list, in our
                response format
        """
        invited = {}
        for room in rooms:
            invite = serialize_event(
                room.invite, time_now, token_id=token_id,
                event_format=format_event_for_client_v2_without_room_id,
            )
            unsigned = dict(invite.get("unsigned", {}))
            invite["unsigned"] = unsigned
            invited_state = list(unsigned.pop("invite_room_state", []))
            invited_state.append(invite)
            invited[room.room_id] = {
                "invite_state": {"events": invited_state}
            }

        return invited

    def encode_archived(self, rooms, time_now, token_id, event_fields):
        """
        Encode the archived rooms in a sync result

        Args:
            rooms (list[synapse.handlers.sync.ArchivedSyncResult]): list of
                sync results for rooms this user is joined to
            time_now(int): current time - used as a baseline for age
                calculations
            token_id(int): ID of the user's auth token - used for namespacing
                of transaction IDs
            event_fields(list<str>): List of event fields to include. If empty,
            all fields will be returned.
        Returns:
            dict[str, dict[str, object]]: The invited rooms list, in our
                response format
        """
        joined = {}
        for room in rooms:
            joined[room.room_id] = self.encode_room(
                room, time_now, token_id, joined=False, only_fields=event_fields
            )

        return joined

    @staticmethod
    def encode_room(room, time_now, token_id, joined=True, only_fields=None):
        """
        Args:
            room (JoinedSyncResult|ArchivedSyncResult): sync result for a
                single room
            time_now (int): current time - used as a baseline for age
                calculations
            token_id (int): ID of the user's auth token - used for namespacing
                of transaction IDs
            joined (bool): True if the user is joined to this room - will mean
                we handle ephemeral events
            only_fields(list<str>): Optional. The list of event fields to include.
        Returns:
            dict[str, object]: the room, encoded in our response format
        """
        def serialize(event):
            # TODO(mjark): Respect formatting requirements in the filter.
            return serialize_event(
                event, time_now, token_id=token_id,
                event_format=format_event_for_client_v2_without_room_id,
                only_event_fields=only_fields,
            )

        state_dict = room.state
        timeline_events = room.timeline.events

        state_events = state_dict.values()

        for event in itertools.chain(state_events, timeline_events):
            # We've had bug reports that events were coming down under the
            # wrong room.
            if event.room_id != room.room_id:
                logger.warn(
                    "Event %r is under room %r instead of %r",
                    event.event_id, room.room_id, event.room_id,
                )

        serialized_state = [serialize(e) for e in state_events]
        serialized_timeline = [serialize(e) for e in timeline_events]

        account_data = room.account_data

        result = {
            "timeline": {
                "events": serialized_timeline,
                "prev_batch": room.timeline.prev_batch.to_string(),
                "limited": room.timeline.limited,
            },
            "state": {"events": serialized_state},
            "account_data": {"events": account_data},
        }

        if joined:
            ephemeral_events = room.ephemeral
            result["ephemeral"] = {"events": ephemeral_events}
            result["unread_notifications"] = room.unread_notifications

        return result


def register_servlets(hs, http_server):
    SyncRestServlet(hs).register(http_server)