jquery.cometd-ack.js

是离开的肌肤了卡机是离开的就富利卡及是了的开发及拉考试及的福利科技阿斯利康的肌肤莱卡及时的离开福建阿斯顿发

(function($)
{
    /**
     * This client-side extension enables the client to acknowledge to the server
     * the messages that the client has received.
     * For the acknowledgement to work, the server must be configured with the
     * correspondent server-side ack extension. If both client and server support
     * the ack extension, then the ack functionality will take place automatically.
     * By enabling this extension, all messages arriving from the server will arrive
     * via the long poll, so the comet communication will be slightly chattier.
     * Messages are not acknowledged one by one, but instead a group of messages is
     * acknowledged when long poll returns.
     */
    $.Cometd.AckExtension = function(name, cometd)
    {
        var _name = name || 'ack';
        var _serverSupportsAcks = false;
        var _ackId = -1;

        if (cometd) cometd.registerExtension(_name, this);

        this.incoming = function(message)
        {
            var channel = message.channel;
            if (channel == '/meta/handshake')
            {
                _serverSupportsAcks = message.ext && message.ext.ack;
            }
            else if (_serverSupportsAcks && channel == '/meta/connect' && message.successful)
            {
                var ext = message.ext;
                if (ext && typeof ext.ack === 'number')
                {
                    _ackId = ext.ack;
                    _debug('AckExtension: server sent ack id {}', _ackId);
                }
            }
            return message;
        };

        this.outgoing = function(message)
        {
            var channel = message.channel;
            if (channel == '/meta/handshake')
            {
                if (!message.ext) message.ext = {};
                message.ext.ack = true;
                _ackId = -1;
            }
            else if (_serverSupportsAcks && channel == '/meta/connect')
            {
                if (!message.ext) message.ext = {};
                message.ext.ack = _ackId;
                _debug('AckExtension: client sending ack id {}', _ackId);
            }
            return message;
        };

        function _debug(text, args)
        {
            if (cometd) cometd._debug(text, args);
        }
    };

    // Register the ack extension on the default cometd object
    new $.Cometd.AckExtension('ack', $.cometd);

})(jQuery);