def on_GET(self, request):
        auth_user, _, is_guest = yield self.auth.get_user_by_req(
            request,
            allow_guest=True
        )
        room_id = None
        if is_guest:
            if "room_id" not in request.args:
                raise SynapseError(400, "Guest users must specify room_id param")
            room_id = request.args["room_id"][0]
        try:
            handler = self.handlers.event_stream_handler
            pagin_config = PaginationConfig.from_request(request)
            timeout = EventStreamRestServlet.DEFAULT_LONGPOLL_TIME_MS
            if "timeout" in request.args:
                try:
                    timeout = int(request.args["timeout"][0])
                except ValueError:
                    raise SynapseError(400, "timeout must be in milliseconds.")

            as_client_event = "raw" not in request.args

            chunk = yield handler.get_stream(
                auth_user.to_string(), pagin_config, timeout=timeout,
                as_client_event=as_client_event, affect_presence=(not is_guest),
                room_id=room_id, is_guest=is_guest
            )
        except:
            logger.exception("Event stream failed")
            raise

        defer.returnValue((200, chunk))

    def on_GET(self, request):
        requester = yield self.auth.get_user_by_req(
            request,
            allow_guest=True,
        )
        is_guest = requester.is_guest
        room_id = None
        if is_guest:
            if b"room_id" not in request.args:
                raise SynapseError(400, "Guest users must specify room_id param")
        if b"room_id" in request.args:
            room_id = request.args[b"room_id"][0].decode('ascii')

        pagin_config = PaginationConfig.from_request(request)
        timeout = EventStreamRestServlet.DEFAULT_LONGPOLL_TIME_MS
        if b"timeout" in request.args:
            try:
                timeout = int(request.args[b"timeout"][0])
            except ValueError:
                raise SynapseError(400, "timeout must be in milliseconds.")

        as_client_event = b"raw" not in request.args

        chunk = yield self.event_stream_handler.get_stream(
            requester.user.to_string(),
            pagin_config,
            timeout=timeout,
            as_client_event=as_client_event,
            affect_presence=(not is_guest),
            room_id=room_id,
            is_guest=is_guest,
        )

        defer.returnValue((200, chunk))

 def on_GET(self, request, room_id):
     user = yield self.auth.get_user_by_req(request)
     pagination_config = PaginationConfig.from_request(request)
     content = yield self.handlers.message_handler.room_initial_sync(
         room_id=urllib.unquote(room_id),
         user_id=user.to_string(),
         pagin_config=pagination_config,
     )
     defer.returnValue((200, content))

 def on_GET(self, request, room_id):
     requester = yield self.auth.get_user_by_req(request, allow_guest=True)
     pagination_config = PaginationConfig.from_request(request)
     content = yield self.handlers.message_handler.room_initial_sync(
         room_id=room_id,
         requester=requester,
         pagin_config=pagination_config,
     )
     defer.returnValue((200, content))

    def initial_sync(self, sync_config):
        """Get a sync for a client which is starting without any state
        Returns:
            A Deferred SyncResult.
        """
        if sync_config.sort == "timeline,desc":
            # TODO(mjark): Handle going through events in reverse order?.
            # What does "most recent events" mean when applying the limits mean
            # in this case?
            raise NotImplementedError()

        now_token = yield self.event_sources.get_current_token()

        presence_stream = self.event_sources.sources["presence"]
        # TODO (mjark): This looks wrong, shouldn't we be getting the presence
        # UP to the present rather than after the present?
        pagination_config = PaginationConfig(from_token=now_token)
        presence, _ = yield presence_stream.get_pagination_rows(
            user=sync_config.user,
            pagination_config=pagination_config.get_source_config("presence"),
            key=None
        )
        room_list = yield self.store.get_rooms_for_user_where_membership_is(
            user_id=sync_config.user.to_string(),
            membership_list=[Membership.INVITE, Membership.JOIN]
        )

        # TODO (mjark): Does public mean "published"?
        published_rooms = yield self.store.get_rooms(is_public=True)
        published_room_ids = set(r["room_id"] for r in published_rooms)

        rooms = []
        for event in room_list:
            room_sync = yield self.initial_sync_for_room(
                event.room_id, sync_config, now_token, published_room_ids
            )
            rooms.append(room_sync)

        defer.returnValue(SyncResult(
            public_user_data=presence,
            private_user_data=[],
            rooms=rooms,
            next_batch=now_token,
        ))

    def on_GET(self, request):
        user = yield self.auth.get_user_by_req(request)
        with_feedback = "feedback" in request.args
        pagination_config = PaginationConfig.from_request(request)
        handler = self.handlers.message_handler
        content = yield handler.snapshot_all_rooms(
            user_id=user.to_string(),
            pagin_config=pagination_config,
            feedback=with_feedback)

        defer.returnValue((200, content))

    def on_GET(self, request):
        requester = yield self.auth.get_user_by_req(request)
        as_client_event = "raw" not in request.args
        pagination_config = PaginationConfig.from_request(request)
        include_archived = request.args.get("archived", None) == ["true"]
        content = yield self.initial_sync_handler.snapshot_all_rooms(
            user_id=requester.user.to_string(),
            pagin_config=pagination_config,
            as_client_event=as_client_event,
            include_archived=include_archived,
        )

        defer.returnValue((200, content))

    def on_GET(self, request):
        auth_user = yield self.auth.get_user_by_req(request)

        handler = self.handlers.event_stream_handler
        pagin_config = PaginationConfig.from_request(request)
        timeout = EventStreamRestServlet.DEFAULT_LONGPOLL_TIME_MS
        if "timeout" in request.args:
            try:
                timeout = int(request.args["timeout"][0])
            except ValueError:
                raise SynapseError(400, "timeout must be in milliseconds.")

        chunk = yield handler.get_stream(auth_user.to_string(), pagin_config,
                                         timeout=timeout)

        defer.returnValue((200, chunk))

    def on_GET(self, request, room_id):
        user, client = yield self.auth.get_user_by_req(request)
        pagination_config = PaginationConfig.from_request(
            request, default_limit=10,
        )
        with_feedback = "feedback" in request.args
        as_client_event = "raw" not in request.args
        handler = self.handlers.message_handler
        msgs = yield handler.get_messages(
            room_id=room_id,
            user_id=user.to_string(),
            pagin_config=pagination_config,
            feedback=with_feedback,
            as_client_event=as_client_event
        )

        defer.returnValue((200, msgs))

    def on_GET(self, request, room_id):
        requester = yield self.auth.get_user_by_req(request, allow_guest=True)
        pagination_config = PaginationConfig.from_request(
            request, default_limit=10,
        )
        as_client_event = b"raw" not in request.args
        filter_bytes = parse_string(request, b"filter", encoding=None)
        if filter_bytes:
            filter_json = urlparse.unquote(filter_bytes.decode("UTF-8"))
            event_filter = Filter(json.loads(filter_json))
        else:
            event_filter = None
        msgs = yield self.pagination_handler.get_messages(
            room_id=room_id,
            requester=requester,
            pagin_config=pagination_config,
            as_client_event=as_client_event,
            event_filter=event_filter,
        )

        defer.returnValue((200, msgs))

    def on_GET(self, request, room_id):
        requester = yield self.auth.get_user_by_req(request, allow_guest=True)
        pagination_config = PaginationConfig.from_request(
            request, default_limit=10,
        )
        as_client_event = "raw" not in request.args
        filter_bytes = request.args.get("filter", None)
        if filter_bytes:
            filter_json = urllib.unquote(filter_bytes[-1]).decode("UTF-8")
            event_filter = Filter(json.loads(filter_json))
        else:
            event_filter = None
        handler = self.handlers.message_handler
        msgs = yield handler.get_messages(
            room_id=room_id,
            requester=requester,
            pagin_config=pagination_config,
            as_client_event=as_client_event,
            event_filter=event_filter,
        )

        defer.returnValue((200, msgs))

    def snapshot_all_rooms(self, user_id=None, pagin_config=None,
                           feedback=False):
        """Retrieve a snapshot of all rooms the user is invited or has joined.

        This snapshot may include messages for all rooms where the user is
        joined, depending on the pagination config.

        Args:
            user_id (str): The ID of the user making the request.
            pagin_config (synapse.api.streams.PaginationConfig): The pagination
            config used to determine how many messages *PER ROOM* to return.
            feedback (bool): True to get feedback along with these messages.
        Returns:
            A list of dicts with "room_id" and "membership" keys for all rooms
            the user is currently invited or joined in on. Rooms where the user
            is joined on, may return a "messages" key with messages, depending
            on the specified PaginationConfig.
        """
        room_list = yield self.store.get_rooms_for_user_where_membership_is(
            user_id=user_id,
            membership_list=[Membership.INVITE, Membership.JOIN]
        )

        user = self.hs.parse_userid(user_id)

        rooms_ret = []

        now_token = yield self.hs.get_event_sources().get_current_token()

        presence_stream = self.hs.get_event_sources().sources["presence"]
        pagination_config = PaginationConfig(from_token=now_token)
        presence, _ = yield presence_stream.get_pagination_rows(
            user, pagination_config.get_source_config("presence"), None
        )

        public_rooms = yield self.store.get_rooms(is_public=True)
        public_room_ids = [r["room_id"] for r in public_rooms]

        limit = pagin_config.limit
        if limit is None:
            limit = 10

        for event in room_list:
            d = {
                "room_id": event.room_id,
                "membership": event.membership,
                "visibility": (
                    "public" if event.room_id in public_room_ids
                    else "private"
                ),
            }

            if event.membership == Membership.INVITE:
                d["inviter"] = event.user_id

            rooms_ret.append(d)

            if event.membership != Membership.JOIN:
                continue
            try:
                messages, token = yield self.store.get_recent_events_for_room(
                    event.room_id,
                    limit=limit,
                    end_token=now_token.room_key,
                )

                start_token = now_token.copy_and_replace("room_key", token[0])
                end_token = now_token.copy_and_replace("room_key", token[1])

                d["messages"] = {
                    "chunk": [self.hs.serialize_event(m) for m in messages],
                    "start": start_token.to_string(),
                    "end": end_token.to_string(),
                }

                current_state = yield self.state_handler.get_current_state(
                    event.room_id
                )
                d["state"] = [
                    self.hs.serialize_event(c) for c in current_state
                ]
            except:
                logger.exception("Failed to get snapshot")

        ret = {
            "rooms": rooms_ret,
            "presence": presence,
            "end": now_token.to_string()
        }

        defer.returnValue(ret)

    def snapshot_all_rooms(self, user_id=None, pagin_config=None,
                           feedback=False, as_client_event=True):
        """Retrieve a snapshot of all rooms the user is invited or has joined.

        This snapshot may include messages for all rooms where the user is
        joined, depending on the pagination config.

        Args:
            user_id (str): The ID of the user making the request.
            pagin_config (synapse.api.streams.PaginationConfig): The pagination
            config used to determine how many messages *PER ROOM* to return.
            feedback (bool): True to get feedback along with these messages.
            as_client_event (bool): True to get events in client-server format.
        Returns:
            A list of dicts with "room_id" and "membership" keys for all rooms
            the user is currently invited or joined in on. Rooms where the user
            is joined on, may return a "messages" key with messages, depending
            on the specified PaginationConfig.
        """
        room_list = yield self.store.get_rooms_for_user_where_membership_is(
            user_id=user_id,
            membership_list=[Membership.INVITE, Membership.JOIN]
        )

        user = UserID.from_string(user_id)

        rooms_ret = []

        now_token = yield self.hs.get_event_sources().get_current_token()

        presence_stream = self.hs.get_event_sources().sources["presence"]
        pagination_config = PaginationConfig(from_token=now_token)
        presence, _ = yield presence_stream.get_pagination_rows(
            user, pagination_config.get_source_config("presence"), None
        )

        public_room_ids = yield self.store.get_public_room_ids()

        limit = pagin_config.limit
        if limit is None:
            limit = 10

        @defer.inlineCallbacks
        def handle_room(event):
            d = {
                "room_id": event.room_id,
                "membership": event.membership,
                "visibility": (
                    "public" if event.room_id in public_room_ids
                    else "private"
                ),
            }

            if event.membership == Membership.INVITE:
                d["inviter"] = event.sender

            rooms_ret.append(d)

            if event.membership != Membership.JOIN:
                return
            try:
                (messages, token), current_state = yield defer.gatherResults(
                    [
                        self.store.get_recent_events_for_room(
                            event.room_id,
                            limit=limit,
                            end_token=now_token.room_key,
                        ),
                        self.state_handler.get_current_state(
                            event.room_id
                        ),
                    ]
                ).addErrback(unwrapFirstError)

                start_token = now_token.copy_and_replace("room_key", token[0])
                end_token = now_token.copy_and_replace("room_key", token[1])
                time_now = self.clock.time_msec()

                d["messages"] = {
                    "chunk": [
                        serialize_event(m, time_now, as_client_event)
                        for m in messages
                    ],
                    "start": start_token.to_string(),
                    "end": end_token.to_string(),
                }

                d["state"] = [
                    serialize_event(c, time_now, as_client_event)
                    for c in current_state.values()
                ]
            except:
                logger.exception("Failed to get snapshot")

        yield defer.gatherResults(
            [handle_room(e) for e in room_list],
            consumeErrors=True
        ).addErrback(unwrapFirstError)

        ret = {
#.........这里部分代码省略.........

    def _snapshot_all_rooms(self, user_id=None, pagin_config=None,
                            as_client_event=True, include_archived=False):

        memberships = [Membership.INVITE, Membership.JOIN]
        if include_archived:
            memberships.append(Membership.LEAVE)

        room_list = yield self.store.get_rooms_for_user_where_membership_is(
            user_id=user_id, membership_list=memberships
        )

        user = UserID.from_string(user_id)

        rooms_ret = []

        now_token = yield self.hs.get_event_sources().get_current_token()

        presence_stream = self.hs.get_event_sources().sources["presence"]
        pagination_config = PaginationConfig(from_token=now_token)
        presence, _ = yield presence_stream.get_pagination_rows(
            user, pagination_config.get_source_config("presence"), None
        )

        receipt_stream = self.hs.get_event_sources().sources["receipt"]
        receipt, _ = yield receipt_stream.get_pagination_rows(
            user, pagination_config.get_source_config("receipt"), None
        )

        tags_by_room = yield self.store.get_tags_for_user(user_id)

        account_data, account_data_by_room = (
            yield self.store.get_account_data_for_user(user_id)
        )

        public_room_ids = yield self.store.get_public_room_ids()

        limit = pagin_config.limit
        if limit is None:
            limit = 10

        @defer.inlineCallbacks
        def handle_room(event):
            d = {
                "room_id": event.room_id,
                "membership": event.membership,
                "visibility": (
                    "public" if event.room_id in public_room_ids
                    else "private"
                ),
            }

            if event.membership == Membership.INVITE:
                time_now = self.clock.time_msec()
                d["inviter"] = event.sender

                invite_event = yield self.store.get_event(event.event_id)
                d["invite"] = yield self._event_serializer.serialize_event(
                    invite_event, time_now, as_client_event,
                )

            rooms_ret.append(d)

            if event.membership not in (Membership.JOIN, Membership.LEAVE):
                return

            try:
                if event.membership == Membership.JOIN:
                    room_end_token = now_token.room_key
                    deferred_room_state = run_in_background(
                        self.state_handler.get_current_state,
                        event.room_id,
                    )
                elif event.membership == Membership.LEAVE:
                    room_end_token = "s%d" % (event.stream_ordering,)
                    deferred_room_state = run_in_background(
                        self.store.get_state_for_events,
                        [event.event_id],
                    )
                    deferred_room_state.addCallback(
                        lambda states: states[event.event_id]
                    )

                (messages, token), current_state = yield make_deferred_yieldable(
                    defer.gatherResults(
                        [
                            run_in_background(
                                self.store.get_recent_events_for_room,
                                event.room_id,
                                limit=limit,
                                end_token=room_end_token,
                            ),
                            deferred_room_state,
                        ]
                    )
                ).addErrback(unwrapFirstError)

                messages = yield filter_events_for_client(
                    self.store, user_id, messages
                )

#.........这里部分代码省略.........

    def snapshot_all_rooms(self, user_id=None, pagin_config=None,
                           as_client_event=True, include_archived=False):
        """Retrieve a snapshot of all rooms the user is invited or has joined.

        This snapshot may include messages for all rooms where the user is
        joined, depending on the pagination config.

        Args:
            user_id (str): The ID of the user making the request.
            pagin_config (synapse.api.streams.PaginationConfig): The pagination
            config used to determine how many messages *PER ROOM* to return.
            as_client_event (bool): True to get events in client-server format.
            include_archived (bool): True to get rooms that the user has left
        Returns:
            A list of dicts with "room_id" and "membership" keys for all rooms
            the user is currently invited or joined in on. Rooms where the user
            is joined on, may return a "messages" key with messages, depending
            on the specified PaginationConfig.
        """
        memberships = [Membership.INVITE, Membership.JOIN]
        if include_archived:
            memberships.append(Membership.LEAVE)

        room_list = yield self.store.get_rooms_for_user_where_membership_is(
            user_id=user_id, membership_list=memberships
        )

        user = UserID.from_string(user_id)

        rooms_ret = []

        now_token = yield self.hs.get_event_sources().get_current_token()

        presence_stream = self.hs.get_event_sources().sources["presence"]
        pagination_config = PaginationConfig(from_token=now_token)
        presence, _ = yield presence_stream.get_pagination_rows(
            user, pagination_config.get_source_config("presence"), None
        )

        receipt_stream = self.hs.get_event_sources().sources["receipt"]
        receipt, _ = yield receipt_stream.get_pagination_rows(
            user, pagination_config.get_source_config("receipt"), None
        )

        tags_by_room = yield self.store.get_tags_for_user(user_id)

        public_room_ids = yield self.store.get_public_room_ids()

        limit = pagin_config.limit
        if limit is None:
            limit = 10

        @defer.inlineCallbacks
        def handle_room(event):
            d = {
                "room_id": event.room_id,
                "membership": event.membership,
                "visibility": (
                    "public" if event.room_id in public_room_ids
                    else "private"
                ),
            }

            if event.membership == Membership.INVITE:
                time_now = self.clock.time_msec()
                d["inviter"] = event.sender

                invite_event = yield self.store.get_event(event.event_id)
                d["invite"] = serialize_event(invite_event, time_now, as_client_event)

            rooms_ret.append(d)

            if event.membership not in (Membership.JOIN, Membership.LEAVE):
                return

            try:
                if event.membership == Membership.JOIN:
                    room_end_token = now_token.room_key
                    deferred_room_state = self.state_handler.get_current_state(
                        event.room_id
                    )
                elif event.membership == Membership.LEAVE:
                    room_end_token = "s%d" % (event.stream_ordering,)
                    deferred_room_state = self.store.get_state_for_events(
                        [event.event_id], None
                    )
                    deferred_room_state.addCallback(
                        lambda states: states[event.event_id]
                    )

                (messages, token), current_state = yield defer.gatherResults(
                    [
                        self.store.get_recent_events_for_room(
                            event.room_id,
                            limit=limit,
                            end_token=room_end_token,
                        ),
                        deferred_room_state,
                    ]
                ).addErrback(unwrapFirstError)
#.........这里部分代码省略.........

    def full_state_sync(self, sync_config, timeline_since_token):
        """Get a sync for a client which is starting without any state.

        If a 'message_since_token' is given, only timeline events which have
        happened since that token will be returned.

        Returns:
            A Deferred SyncResult.
        """
        now_token = yield self.event_sources.get_current_token()

        now_token, ephemeral_by_room = yield self.ephemeral_by_room(
            sync_config, now_token
        )

        presence_stream = self.event_sources.sources["presence"]
        # TODO (mjark): This looks wrong, shouldn't we be getting the presence
        # UP to the present rather than after the present?
        pagination_config = PaginationConfig(from_token=now_token)
        presence, _ = yield presence_stream.get_pagination_rows(
            user=sync_config.user,
            pagination_config=pagination_config.get_source_config("presence"),
            key=None
        )

        membership_list = (Membership.INVITE, Membership.JOIN)
        if sync_config.filter_collection.include_leave:
            membership_list += (Membership.LEAVE, Membership.BAN)

        room_list = yield self.store.get_rooms_for_user_where_membership_is(
            user_id=sync_config.user.to_string(),
            membership_list=membership_list
        )

        account_data, account_data_by_room = (
            yield self.store.get_account_data_for_user(
                sync_config.user.to_string()
            )
        )

        tags_by_room = yield self.store.get_tags_for_user(
            sync_config.user.to_string()
        )

        joined = []
        invited = []
        archived = []
        deferreds = []

        room_list_chunks = [room_list[i:i + 10] for i in xrange(0, len(room_list), 10)]
        for room_list_chunk in room_list_chunks:
            for event in room_list_chunk:
                if event.membership == Membership.JOIN:
                    room_sync_deferred = preserve_fn(
                        self.full_state_sync_for_joined_room
                    )(
                        room_id=event.room_id,
                        sync_config=sync_config,
                        now_token=now_token,
                        timeline_since_token=timeline_since_token,
                        ephemeral_by_room=ephemeral_by_room,
                        tags_by_room=tags_by_room,
                        account_data_by_room=account_data_by_room,
                    )
                    room_sync_deferred.addCallback(joined.append)
                    deferreds.append(room_sync_deferred)
                elif event.membership == Membership.INVITE:
                    invite = yield self.store.get_event(event.event_id)
                    invited.append(InvitedSyncResult(
                        room_id=event.room_id,
                        invite=invite,
                    ))
                elif event.membership in (Membership.LEAVE, Membership.BAN):
                    leave_token = now_token.copy_and_replace(
                        "room_key", "s%d" % (event.stream_ordering,)
                    )
                    room_sync_deferred = preserve_fn(
                        self.full_state_sync_for_archived_room
                    )(
                        sync_config=sync_config,
                        room_id=event.room_id,
                        leave_event_id=event.event_id,
                        leave_token=leave_token,
                        timeline_since_token=timeline_since_token,
                        tags_by_room=tags_by_room,
                        account_data_by_room=account_data_by_room,
                    )
                    room_sync_deferred.addCallback(archived.append)
                    deferreds.append(room_sync_deferred)

            yield defer.gatherResults(
                deferreds, consumeErrors=True
            ).addErrback(unwrapFirstError)

        account_data_for_user = sync_config.filter_collection.filter_account_data(
            self.account_data_for_user(account_data)
        )

        presence = sync_config.filter_collection.filter_presence(
            presence
#.........这里部分代码省略.........

    def _snapshot_all_rooms(self, user_id=None, pagin_config=None,
                            as_client_event=True, include_archived=False):

        memberships = [Membership.INVITE, Membership.JOIN]
        if include_archived:
            memberships.append(Membership.LEAVE)

        room_list = yield self.store.get_rooms_for_user_where_membership_is(
            user_id=user_id, membership_list=memberships
        )

        user = UserID.from_string(user_id)

        rooms_ret = []

        now_token = yield self.hs.get_event_sources().get_current_token()

        presence_stream = self.hs.get_event_sources().sources["presence"]
        pagination_config = PaginationConfig(from_token=now_token)
        presence, _ = yield presence_stream.get_pagination_rows(
            user, pagination_config.get_source_config("presence"), None
        )

        receipt_stream = self.hs.get_event_sources().sources["receipt"]
        receipt, _ = yield receipt_stream.get_pagination_rows(
            user, pagination_config.get_source_config("receipt"), None
        )

        tags_by_room = yield self.store.get_tags_for_user(user_id)

        account_data, account_data_by_room = (
            yield self.store.get_account_data_for_user(user_id)
        )

        public_room_ids = yield self.store.get_public_room_ids()

        limit = pagin_config.limit
        if limit is None:
            limit = 10

        @defer.inlineCallbacks
        def handle_room(event):
            d = {
                "room_id": event.room_id,
                "membership": event.membership,
                "visibility": (
                    "public" if event.room_id in public_room_ids
                    else "private"
                ),
            }

            if event.membership == Membership.INVITE:
                time_now = self.clock.time_msec()
                d["inviter"] = event.sender

                invite_event = yield self.store.get_event(event.event_id)
                d["invite"] = serialize_event(invite_event, time_now, as_client_event)

            rooms_ret.append(d)

            if event.membership not in (Membership.JOIN, Membership.LEAVE):
                return

            try:
                if event.membership == Membership.JOIN:
                    room_end_token = now_token.room_key
                    deferred_room_state = self.state_handler.get_current_state(
                        event.room_id
                    )
                elif event.membership == Membership.LEAVE:
                    room_end_token = "s%d" % (event.stream_ordering,)
                    deferred_room_state = self.store.get_state_for_events(
                        [event.event_id], None
                    )
                    deferred_room_state.addCallback(
                        lambda states: states[event.event_id]
                    )

                (messages, token), current_state = yield defer.gatherResults(
                    [
                        self.store.get_recent_events_for_room(
                            event.room_id,
                            limit=limit,
                            end_token=room_end_token,
                        ),
                        deferred_room_state,
                    ]
                ).addErrback(unwrapFirstError)

                messages = yield self._filter_events_for_client(
                    user_id, messages
                )

                start_token = now_token.copy_and_replace("room_key", token[0])
                end_token = now_token.copy_and_replace("room_key", token[1])
                time_now = self.clock.time_msec()

                d["messages"] = {
                    "chunk": [
                        serialize_event(m, time_now, as_client_event)
#.........这里部分代码省略.........

    def full_state_sync(self, sync_config, timeline_since_token):
        """Get a sync for a client which is starting without any state.

        If a 'message_since_token' is given, only timeline events which have
        happened since that token will be returned.

        Returns:
            A Deferred SyncResult.
        """
        now_token = yield self.event_sources.get_current_token()

        now_token, ephemeral_by_room = yield self.ephemeral_by_room(
            sync_config, now_token
        )

        presence_stream = self.event_sources.sources["presence"]
        # TODO (mjark): This looks wrong, shouldn't we be getting the presence
        # UP to the present rather than after the present?
        pagination_config = PaginationConfig(from_token=now_token)
        presence, _ = yield presence_stream.get_pagination_rows(
            user=sync_config.user,
            pagination_config=pagination_config.get_source_config("presence"),
            key=None
        )
        room_list = yield self.store.get_rooms_for_user_where_membership_is(
            user_id=sync_config.user.to_string(),
            membership_list=(
                Membership.INVITE,
                Membership.JOIN,
                Membership.LEAVE,
                Membership.BAN
            )
        )

        tags_by_room = yield self.store.get_tags_for_user(
            sync_config.user.to_string()
        )

        joined = []
        invited = []
        archived = []
        for event in room_list:
            if event.membership == Membership.JOIN:
                room_sync = yield self.full_state_sync_for_joined_room(
                    room_id=event.room_id,
                    sync_config=sync_config,
                    now_token=now_token,
                    timeline_since_token=timeline_since_token,
                    ephemeral_by_room=ephemeral_by_room,
                    tags_by_room=tags_by_room,
                )
                joined.append(room_sync)
            elif event.membership == Membership.INVITE:
                invite = yield self.store.get_event(event.event_id)
                invited.append(InvitedSyncResult(
                    room_id=event.room_id,
                    invite=invite,
                ))
            elif event.membership in (Membership.LEAVE, Membership.BAN):
                leave_token = now_token.copy_and_replace(
                    "room_key", "s%d" % (event.stream_ordering,)
                )
                room_sync = yield self.full_state_sync_for_archived_room(
                    sync_config=sync_config,
                    room_id=event.room_id,
                    leave_event_id=event.event_id,
                    leave_token=leave_token,
                    timeline_since_token=timeline_since_token,
                    tags_by_room=tags_by_room,
                )
                archived.append(room_sync)

        defer.returnValue(SyncResult(
            presence=presence,
            joined=joined,
            invited=invited,
            archived=archived,
            next_batch=now_token,
        ))