synapse-product/synapse/rest/client/v2_alpha/sync.py

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# -*- coding: utf-8 -*-
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# 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.presence import format_user_presence_state
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,
)
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from synapse.api.filtering import FilterCollection, DEFAULT_FILTER_COLLECTION
from synapse.api.errors import SynapseError
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from synapse.api.constants import PresenceState
from ._base import client_v2_patterns
from ._base import set_timeline_upper_limit
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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.hs = hs
self.auth = hs.get_auth()
self.sync_handler = hs.get_sync_handler()
self.clock = hs.get_clock()
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self.filtering = hs.get_filtering()
self.presence_handler = hs.get_presence_handler()
@defer.inlineCallbacks
def on_GET(self, request):
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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)
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if filter_id:
if filter_id.startswith('{'):
try:
filter_object = json.loads(filter_id)
set_timeline_upper_limit(filter_object,
self.hs.config.filter_timeline_limit)
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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
)
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else:
filter = DEFAULT_FILTER_COLLECTION
sync_config = SyncConfig(
user=user,
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filter_collection=filter,
is_guest=requester.is_guest,
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request_key=request_key,
device_id=device_id,
)
if since is not None:
since_token = StreamToken.from_string(since)
else:
since_token = None
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affect_presence = set_presence != PresenceState.OFFLINE
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if affect_presence:
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yield self.presence_handler.set_state(user, {"presence": set_presence}, True)
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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()
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response_content = self.encode_response(
time_now, sync_result, requester.access_token_id, filter
)
defer.returnValue((200, response_content))
@staticmethod
def encode_response(time_now, sync_result, access_token_id, filter):
joined = SyncRestServlet.encode_joined(
sync_result.joined, time_now, access_token_id, filter.event_fields
)
invited = SyncRestServlet.encode_invited(
sync_result.invited, time_now, access_token_id,
)
archived = SyncRestServlet.encode_archived(
sync_result.archived, time_now, access_token_id,
filter.event_fields,
)
return {
"account_data": {"events": sync_result.account_data},
"to_device": {"events": sync_result.to_device},
"device_lists": {
"changed": list(sync_result.device_lists),
},
"presence": SyncRestServlet.encode_presence(
sync_result.presence, time_now
),
"rooms": {
"join": joined,
"invite": invited,
"leave": archived,
},
"device_one_time_keys_count": sync_result.device_one_time_keys_count,
"next_batch": sync_result.next_batch.to_string(),
}
@staticmethod
def encode_presence(events, time_now):
return {
"events": [
{
"type": "m.presence",
"sender": event.user_id,
"content": format_user_presence_state(
event, time_now, include_user_id=False
),
}
for event in events
]
}
@staticmethod
def encode_joined(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] = SyncRestServlet.encode_room(
room, time_now, token_id, only_fields=event_fields
)
return joined
@staticmethod
def encode_invited(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,
is_invite=True,
)
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unsigned = dict(invite.get("unsigned", {}))
invite["unsigned"] = unsigned
invited_state = list(unsigned.pop("invite_room_state", []))
invited_state.append(invite)
invited[room.room_id] = {
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"invite_state": {"events": invited_state}
}
return invited
@staticmethod
def encode_archived(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] = SyncRestServlet.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
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timeline_events = room.timeline.events
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state_events = state_dict.values()
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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]
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account_data = room.account_data
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result = {
"timeline": {
"events": serialized_timeline,
"prev_batch": room.timeline.prev_batch.to_string(),
"limited": room.timeline.limited,
},
"state": {"events": serialized_state},
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"account_data": {"events": account_data},
}
if joined:
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ephemeral_events = room.ephemeral
result["ephemeral"] = {"events": ephemeral_events}
result["unread_notifications"] = room.unread_notifications
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return result
def register_servlets(hs, http_server):
SyncRestServlet(hs).register(http_server)