anonymousland-synapse/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.
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import itertools
import logging
from synapse.api.constants import PresenceState
from synapse.api.errors import Codes, StoreError, SynapseError
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from synapse.api.filtering import DEFAULT_FILTER_COLLECTION, FilterCollection
from synapse.events.utils import (
format_event_for_client_v2_without_room_id,
format_event_raw,
)
from synapse.handlers.presence import format_user_presence_state
from synapse.handlers.sync import SyncConfig
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from synapse.http.servlet import RestServlet, parse_boolean, parse_integer, parse_string
from synapse.types import StreamToken
from synapse.util import json_decoder
from ._base import client_patterns, set_timeline_upper_limit
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.
"${room_id}": { // Id of the room being updated
"event_map": // Map of EventID -> event JSON.
"timeline": { // The recent events in the room if gap is "true"
"limited": // Was the per-room event limit exceeded?
// otherwise the next events in the room.
"events": [] // list of EventIDs in the "event_map".
"prev_batch": // back token for getting previous events.
}
"state": {"events": []} // list of EventIDs updating the
// current state to be what it should
// be at the end of the batch.
"ephemeral": {"events": []} // list of event objects
}
},
"invite": {}, // Invited rooms being updated.
"leave": {} // Archived rooms being updated.
}
}
"""
PATTERNS = client_patterns("/sync$")
ALLOWED_PRESENCE = {"online", "offline", "unavailable"}
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()
self._server_notices_sender = hs.get_server_notices_sender()
self._event_serializer = hs.get_event_client_serializer()
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async def on_GET(self, request):
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if b"from" in request.args:
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# /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'?"
)
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requester = await 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(
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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)
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logger.debug(
"/sync: user=%r, timeout=%r, since=%r, "
"set_presence=%r, filter_id=%r, device_id=%r",
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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 is None:
filter_collection = DEFAULT_FILTER_COLLECTION
elif filter_id.startswith("{"):
try:
filter_object = json_decoder.decode(filter_id)
set_timeline_upper_limit(
filter_object, self.hs.config.filter_timeline_limit
)
except Exception:
raise SynapseError(400, "Invalid filter JSON")
self.filtering.check_valid_filter(filter_object)
filter_collection = FilterCollection(filter_object)
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else:
try:
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filter_collection = await self.filtering.get_user_filter(
user.localpart, filter_id
)
except StoreError as err:
if err.code != 404:
raise
# fix up the description and errcode to be more useful
raise SynapseError(400, "No such filter", errcode=Codes.INVALID_PARAM)
sync_config = SyncConfig(
user=user,
filter_collection=filter_collection,
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
# send any outstanding server notices to the user.
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await self._server_notices_sender.on_user_syncing(user.to_string())
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affect_presence = set_presence != PresenceState.OFFLINE
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if affect_presence:
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await self.presence_handler.set_state(
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user, {"presence": set_presence}, True
)
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context = await self.presence_handler.user_syncing(
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user.to_string(), affect_presence=affect_presence
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)
with context:
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sync_result = await self.sync_handler.wait_for_sync_for_user(
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sync_config,
since_token=since_token,
timeout=timeout,
full_state=full_state,
)
# the client may have disconnected by now; don't bother to serialize the
# response if so.
if request._disconnected:
logger.info("Client has disconnected; not serializing response.")
return 200, {}
time_now = self.clock.time_msec()
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response_content = await self.encode_response(
time_now, sync_result, requester.access_token_id, filter_collection
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)
logger.debug("Event formatting complete")
return 200, response_content
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async def encode_response(self, time_now, sync_result, access_token_id, filter):
logger.debug("Formatting events in sync response")
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if filter.event_format == "client":
event_formatter = format_event_for_client_v2_without_room_id
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elif filter.event_format == "federation":
event_formatter = format_event_raw
else:
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raise Exception("Unknown event format %s" % (filter.event_format,))
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joined = await self.encode_joined(
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sync_result.joined,
time_now,
access_token_id,
filter.event_fields,
event_formatter,
)
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invited = await self.encode_invited(
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sync_result.invited, time_now, access_token_id, event_formatter
)
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archived = await self.encode_archived(
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sync_result.archived,
time_now,
access_token_id,
filter.event_fields,
event_formatter,
)
logger.debug("building sync response dict")
return {
"account_data": {"events": sync_result.account_data},
"to_device": {"events": sync_result.to_device},
"device_lists": {
"changed": list(sync_result.device_lists.changed),
"left": list(sync_result.device_lists.left),
},
"presence": SyncRestServlet.encode_presence(sync_result.presence, time_now),
"rooms": {"join": joined, "invite": invited, "leave": archived},
"groups": {
"join": sync_result.groups.join,
"invite": sync_result.groups.invite,
"leave": sync_result.groups.leave,
},
"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
]
}
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async def encode_joined(
self, rooms, time_now, token_id, event_fields, event_formatter
):
"""
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.
event_formatter (func[dict]): function to convert from federation format
to client format
Returns:
dict[str, dict[str, object]]: the joined rooms list, in our
response format
"""
joined = {}
for room in rooms:
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joined[room.room_id] = await self.encode_room(
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room,
time_now,
token_id,
joined=True,
only_fields=event_fields,
event_formatter=event_formatter,
)
return joined
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async def encode_invited(self, rooms, time_now, token_id, event_formatter):
"""
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
event_formatter (func[dict]): function to convert from federation format
to client format
Returns:
dict[str, dict[str, object]]: the invited rooms list, in our
response format
"""
invited = {}
for room in rooms:
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invite = await self._event_serializer.serialize_event(
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room.invite,
time_now,
token_id=token_id,
event_format=event_formatter,
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)
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invited[room.room_id] = {"invite_state": {"events": invited_state}}
return invited
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async def encode_archived(
self, rooms, time_now, token_id, event_fields, event_formatter
):
"""
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.
event_formatter (func[dict]): function to convert from federation format
to client format
Returns:
dict[str, dict[str, object]]: The invited rooms list, in our
response format
"""
joined = {}
for room in rooms:
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joined[room.room_id] = await self.encode_room(
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room,
time_now,
token_id,
joined=False,
only_fields=event_fields,
event_formatter=event_formatter,
)
return joined
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async def encode_room(
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self, room, time_now, token_id, joined, only_fields, event_formatter
):
"""
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.
event_formatter (func[dict]): function to convert from federation format
to client format
Returns:
dict[str, object]: the room, encoded in our response format
"""
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def serialize(events):
return self._event_serializer.serialize_events(
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events,
time_now=time_now,
# We don't bundle "live" events, as otherwise clients
# will end up double counting annotations.
bundle_aggregations=False,
token_id=token_id,
event_format=event_formatter,
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.warning(
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"Event %r is under room %r instead of %r",
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event.event_id,
room.room_id,
event.room_id,
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)
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serialized_state = await serialize(state_events)
serialized_timeline = await serialize(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
result["summary"] = room.summary
return result
def register_servlets(hs, http_server):
SyncRestServlet(hs).register(http_server)