diff options
Diffstat (limited to 'plugins/Comet/jquery.comet.js')
| -rw-r--r-- | plugins/Comet/jquery.comet.js | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/plugins/Comet/jquery.comet.js b/plugins/Comet/jquery.comet.js new file mode 100644 index 000000000..2124e882c --- /dev/null +++ b/plugins/Comet/jquery.comet.js @@ -0,0 +1,363 @@ +(function($)
+{
+ var msgHandshake =
+ {
+ version: '1.0',
+ minimumVersion: '0.9',
+ channel: '/meta/handshake'
+ };
+
+ var oTransport = function()
+ {
+ this._bXD =
+ (($.comet._sUrl.substring(0,4) == 'http') && ($.comet._sUrl.substr(7,location.href.length).replace(/\/.*/, '') != location.host))
+ ?
+ true
+ :false;
+
+ this.connectionType = (this._bXD) ? 'callback-polling' : 'long-polling';
+
+ this.startup = function(oReturn)
+ {
+ if(this._comet._bConnected) return;
+ this.tunnelInit();
+ };
+
+ this.tunnelInit = function()
+ {
+ var msgConnect =
+ {
+ channel: '/meta/connect',
+ clientId: $.comet.clientId,
+ id: String($.comet._nNextId++),
+ connectionType: $.comet._oTransport.connectionType
+ };
+
+ this.openTunnel(msgConnect);
+ };
+
+ this.openTunnel = function(oMsg)
+ {
+ $.comet._bPolling = true;
+
+ this._send($.comet._sUrl, oMsg, function(sReturn)
+ {
+ var oReturn = (typeof sReturn != "object") ? (eval('(' + sReturn + ')')) : sReturn;
+ $.comet._bPolling = false;
+ $.comet.deliver(oReturn);
+ $.comet._oTransport.closeTunnel();
+ });
+ };
+
+ this.closeTunnel = function()
+ {
+ if(!$.comet._bInitialized) return;
+
+ if($.comet._advice)
+ {
+ if($.comet._advice.reconnect == 'none') return;
+
+ if($.comet._advice.interval > 0)
+ {
+ setTimeout($.comet._oTransport._connect, $.comet._advice.interval);
+ }
+ else
+ {
+ $.comet._oTransport._connect();
+ }
+ }
+ else
+ {
+ $.comet._oTransport._connect();
+ }
+ };
+
+ this._connect = function()
+ {
+ if(!$.comet._bInitialized) return;
+
+ if($.comet._bPolling) return;
+
+ if($.comet._advice && $.comet._advice.reconnect == 'handshake')
+ {
+ $.comet._bConnected = false;
+ $.comet.init($.comet._sUrl);
+ }
+ else if($.comet._bConnected)
+ {
+ var msgConnect =
+ {
+ //jsonp: 'test',
+ clientId: $.comet.clientId,
+ id: String($.comet._nNextId++),
+ channel: '/meta/connect',
+ connectionType: $.comet._oTransport.connectionType
+ };
+ $.comet._oTransport.openTunnel(msgConnect);
+ }
+ };
+
+ this._send = function(sUrl, oMsg, fCallback) {
+ //default callback will check advice, deliver messages, and reconnect
+ var fCallback = (fCallback) ? fCallback : function(sReturn)
+ {
+ var oReturn = (typeof sReturn != "object") ? (eval('(' + sReturn + ')')) : sReturn;
+
+ $.comet.deliver(oReturn);
+
+ if($.comet._advice)
+ {
+ if($.comet._advice.reconnect == 'none')
+ return;
+
+ if($.comet._advice.interval > 0)
+ {
+ setTimeout($.comet._oTransport._connect, $.comet._advice.interval);
+ }
+ else
+ {
+ $.comet._oTransport._connect();
+ }
+ }
+ else
+ {
+ $.comet._oTransport._connect();
+ }
+ };
+
+ //regular AJAX for same domain calls
+ if((!this._bXD) && (this.connectionType == 'long-polling'))
+ {
+ this._pollRequest = $.ajax({
+ url: sUrl,
+ type: 'post',
+ beforeSend: function(oXhr) { oXhr.setRequestHeader('Connection', 'Keep-Alive'); },
+ data: { message: JSON.stringify(oMsg) },
+ success: fCallback
+ });
+ }
+ else // JSONP callback for cross domain
+ {
+ this._pollRequest = $.ajax({
+ url: sUrl,
+ dataType: 'jsonp',
+ jsonp: 'jsonp',
+ beforeSend: function(oXhr) { oXhr.setRequestHeader('Connection', 'Keep-Alive'); },
+ data:
+ {
+ message: JSON.stringify($.extend(oMsg,{connectionType: 'callback-polling' }))
+ },
+ success: fCallback
+ });
+ }
+ }
+ };
+
+ $.comet = new function()
+ {
+ this.CONNECTED = 'CONNECTED';
+ this.CONNECTING = 'CONNECTING';
+ this.DISCONNECTED = 'DISCONNECTED';
+ this.DISCONNECTING = 'DISCONNECTING';
+
+ this._aMessageQueue = [];
+ this._aSubscriptions = [];
+ this._aSubscriptionCallbacks = [];
+ this._bInitialized = false;
+ this._bConnected = false;
+ this._nBatch = 0;
+ this._nNextId = 0;
+ // just define the transport, do not assign it yet.
+ this._oTransport = ''; //oTransport;
+ this._sUrl = '';
+
+ this.supportedConectionTypes = [ 'long-polling', 'callback-polling' ];
+
+ this.clientId = '';
+
+ this._bTrigger = true; // this sends $.event.trigger(channel, data)
+
+ this.init = function(sUrl)
+ {
+ this._sUrl = (sUrl) ? sUrl : '/cometd';
+
+ this._oTransport = new oTransport();
+
+ this._aMessageQueue = [];
+ this._aSubscriptions = [];
+ this._bInitialized = true;
+ this.startBatch();
+
+ var oMsg = $.extend(msgHandshake, {id: String(this._nNextId++)});
+
+ this._oTransport._send(this._sUrl, oMsg, $.comet._finishInit);
+ };
+
+ this._finishInit = function(sReturn)
+ {
+ var oReturn = (typeof sReturn != "object") ? (eval('(' + sReturn + ')')[0]) : sReturn[0];
+
+ if(oReturn.advice)
+ $.comet._advice = oReturn.advice;
+
+ var bSuccess = (oReturn.successful) ? oReturn.successful : false;
+ // do version check
+
+ if(bSuccess)
+ {
+ // pick transport ?
+ // ......
+
+ $.comet._oTransport._comet = $.comet;
+ $.comet._oTransport.version = $.comet.version;
+
+ $.comet.clientId = oReturn.clientId;
+ $.comet._oTransport.startup(oReturn);
+ $.comet.endBatch();
+ }
+ };
+
+ this._sendMessage = function(oMsg)
+ {
+ if($.comet._nBatch <= 0)
+ {
+ if(oMsg.length > 0)
+ for(var i in oMsg)
+ {
+ oMsg[i].clientId = String($.comet.clientId);
+ oMsg[i].id = String($.comet._nNextId++);
+ }
+ else
+ {
+ oMsg.clientId = String($.comet.clientId);
+ oMsg.id = String($.comet._nNextId++);
+ }
+
+ $.comet._oTransport._send($.comet._sUrl, oMsg);
+ }
+ else
+ {
+ $.comet._aMessageQueue.push(oMsg);
+ }
+ };
+
+
+ this.startBatch = function() { this._nBatch++ };
+ this.endBatch = function() {
+ if(--this._nBatch <= 0)
+ {
+ this._nBatch = 0;
+ if(this._aMessageQueue.length > 0)
+ {
+ this._sendMessage(this._aMessageQueue);
+ this._aMessageQueue = [];
+ }
+ }
+ };
+
+ this.subscribe = function(sSubscription, fCallback)
+ {
+ // if this topic has not been subscribed to yet, send the message now
+ if(!this._aSubscriptions[sSubscription])
+ {
+ this._aSubscriptions.push(sSubscription)
+
+ if (fCallback) {
+ this._aSubscriptionCallbacks[sSubscription] = fCallback;
+ }
+
+ this._sendMessage({ channel: '/meta/subscribe', subscription: sSubscription });
+ }
+
+ //$.event.add(window, sSubscription, fCallback);
+ };
+
+ this.unsubscribe = function(sSubscription) {
+ $.comet._sendMessage({ channel: '/meta/unsubscribe', subscription: sSubscription });
+ };
+
+ this.publish = function(sChannel, oData)
+ {
+ $.comet._sendMessage({channel: sChannel, data: oData});
+ };
+
+ this.deliver = function(sReturn)
+ {
+ var oReturn = sReturn;//eval(sReturn);
+
+ $(oReturn).each(function()
+ {
+ $.comet._deliver(this);
+ });
+ };
+
+ this.disconnect = function()
+ {
+ $($.comet._aSubscriptions).each(function(i)
+ {
+ $.comet.unsubscribe($.comet._aSubscriptions[i]);
+ });
+
+ $.comet._sendMessage({channel:'/meta/disconnect'});
+
+ $.comet._bInitialized = false;
+ }
+
+ this._deliver = function(oMsg,oData)
+ {
+ if(oMsg.advice)
+ {
+ $.comet._advice = oMsg.advice;
+ }
+
+ switch(oMsg.channel)
+ {
+ case '/meta/connect':
+ if(oMsg.successful && !$.comet._bConnected)
+ {
+ $.comet._bConnected = $.comet._bInitialized;
+ $.comet.endBatch();
+ /*
+ $.comet._sendMessage(msgConnect);
+ */
+ }
+ else
+ {}
+ //$.comet._bConnected = false;
+ break;
+
+ // add in subscription handling stuff
+ case '/meta/subscribe':
+ if(!oMsg.successful)
+ {
+ $.comet._oTransport._cancelConnect();
+ return;
+ }
+ break;
+
+ case '/meta/unsubscribe':
+ if(!oMsg.successful)
+ {
+ $.comet._oTransport._cancelConnect();
+ return;
+ }
+ break;
+
+ }
+
+ if(oMsg.data)
+ {
+ if($.comet._bTrigger)
+ {
+ $.event.trigger(oMsg.channel, [oMsg]);
+ }
+
+ var cb = $.comet._aSubscriptionCallbacks[oMsg.channel];
+ if (cb) {
+ cb(oMsg);
+ }
+ }
+ };
+};
+
+})(jQuery);
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