forked from GNUsocial/gnu-social
first pass at Comet plugin; doesn't yet update
This commit is contained in:
Evan Prodromou
363
plugins/Comet/jquery.comet.js
Normal file
363
plugins/Comet/jquery.comet.js
Normal file
@@ -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);
|
||||
Reference in New Issue
Block a user