Ext.lib.Ajax.isCrossDomain = function(u) { var match = /(?:(\w*:)\/\/)?([\w\.]*(?::\d*)?)/.exec(u);
if (!match[1]) return false; // No protocol, not cross-domain
return (match[1] != location.protocol) || (match[2] != location.host);
};
Ext.override(Ext.data.Connection, {
request : function(o){ if(this.fireEvent("beforerequest", this, o) !== false){ var p = o.params;
if(typeof p == "function"){ p = p.call(o.scope||window, o);
}
if(typeof p == "object"){ p = Ext.urlEncode(p);
}
if(this.extraParams){ var extras = Ext.urlEncode(this.extraParams);
p = p ? (p + '&' + extras) : extras;
}
var url = o.url || this.url;
if(typeof url == 'function'){ url = url.call(o.scope||window, o);
}
if(o.form){ var form = Ext.getDom(o.form);
url = url || form.action;
var enctype = form.getAttribute("enctype"); if(o.isUpload || (enctype && enctype.toLowerCase() == 'multipart/form-data')){ return this.doFormUpload(o, p, url);
}
var f = Ext.lib.Ajax.serializeForm(form);
p = p ? (p + '&' + f) : f;
}
var hs = o.headers;
if(this.defaultHeaders){ hs = Ext.apply(hs || {}, this.defaultHeaders); if(!o.headers){ o.headers = hs;
}
}
var cb = { success: this.handleResponse,
failure: this.handleFailure,
scope: this,
argument: {options: o}, timeout : this.timeout
};
var method = o.method||this.method||(p ? "POST" : "GET");
if(method == 'GET' && (this.disableCaching && o.disableCaching !== false) || o.disableCaching === true){ url += (url.indexOf('?') != -1 ? '&' : '?') + '_dc=' + (new Date().getTime()); }
if(typeof o.autoAbort == 'boolean'){ // options gets top priority if(o.autoAbort){ this.abort();
}
}else if(this.autoAbort !== false){ this.abort();
}
if((method == 'GET' && p) || o.xmlData || o.jsonData){ url += (url.indexOf('?') != -1 ? '&' : '?') + p; p = '';
}
if (o.scriptTag || this.scriptTag || Ext.lib.Ajax.isCrossDomain(url)) { this.transId = this.scriptRequest(method, url, cb, p, o);
} else { this.transId = Ext.lib.Ajax.request(method, url, cb, p, o);
}
return this.transId;
}else{ Ext.callback(o.callback, o.scope, [o, null, null]);
return null;
}
},
scriptRequest : function(method, url, cb, data, options) { var transId = ++Ext.data.ScriptTagProxy.TRANS_ID;
var trans = { id : transId,
cb : options.callbackName || "stcCallback"+transId,
scriptId : "stcScript"+transId,
options : options
};
url += (url.indexOf("?") != -1 ? "&" : "?") + data + String.format("&{0}={1}", options.callbackParam || this.callbackParam || 'callback', trans.cb);
var conn = this;
window[trans.cb] = function(o){ conn.handleScriptResponse(o, trans);
};
// Set up the timeout handler
trans.timeoutId = this.handleScriptFailure.defer(cb.timeout, this, [trans]);
var script = document.createElement("script"); script.setAttribute("src", url); script.setAttribute("type", "text/javascript"); script.setAttribute("id", trans.scriptId); document.getElementsByTagName("head")[0].appendChild(script);
return trans;
},
handleScriptResponse : function(o, trans){ this.transId = false;
this.destroyScriptTrans(trans, true);
var options = trans.options;
// Attempt to parse a string parameter as XML.
var doc;
if (typeof o == 'string') { if (window.ActiveXObject) { doc = new ActiveXObject("Microsoft.XMLDOM"); doc.async = "false";
doc.loadXML(o);
} else { doc = new DOMParser().parseFromString(o,"text/xml");
}
}
// Create the bogus XHR
response = { responseObject: o,
responseText: (typeof o == "object") ? Ext.util.JSON.encode(o) : String(o),
responseXML: doc,
argument: options.argument
}
this.fireEvent("requestcomplete", this, response, options); Ext.callback(options.success, options.scope, [response, options]);
Ext.callback(options.callback, options.scope, [options, true, response]);
},
handleScriptFailure: function(trans) { this.transId = false;
this.destroyScriptTrans(trans, false);
var options = trans.options;
response = { argument: options.argument,
status: 500,
statusText: 'Server failed to respond',
responseText: ''
};
this.fireEvent("requestexception", this, response, options, { status: -1,
statusText: 'communication failure'
});
Ext.callback(options.failure, options.scope, [response, options]);
Ext.callback(options.callback, options.scope, [options, false, response]);
},
// private
destroyScriptTrans : function(trans, isLoaded){ document.getElementsByTagName("head")[0].removeChild(document.getElementById(trans.scriptId)); clearTimeout(trans.timeoutId);
if(isLoaded){ window[trans.cb] = undefined;
try{ delete window[trans.cb];
}catch(e){} }else{ // if hasn't been loaded, wait for load to remove it to prevent script error
window[trans.cb] = function(){ window[trans.cb] = undefined;
try{ delete window[trans.cb];
}catch(e){} };
}
}
});