+ ajax: function( url, options ) {
+
+ // If options is not an object,
+ // we simulate pre-1.5 signature
+ if ( typeof options !== "object" ) {
+ options = url;
+ url = undefined;
+ }
+
+ // Force options to be an object
+ options = options || {};
+
+ var // Create the final options object
+ s = jQuery.extend( true, {}, jQuery.ajaxSettings, options ),
+ // Callbacks contexts
+ // We force the original context if it exists
+ // or take it from jQuery.ajaxSettings otherwise
+ // (plain objects used as context get extended)
+ callbackContext =
+ ( s.context = ( "context" in options ? options : jQuery.ajaxSettings ).context ) || s,
+ globalEventContext = callbackContext === s ? jQuery.event : jQuery( callbackContext ),
+ // Deferreds
+ deferred = jQuery.Deferred(),
+ completeDeferred = jQuery._Deferred(),
+ // Status-dependent callbacks
+ statusCode = s.statusCode || {},
+ // Headers (they are sent all at once)
+ requestHeaders = {},
+ // Response headers
+ responseHeadersString,
+ responseHeaders,
+ // transport
+ transport,
+ // timeout handle
+ timeoutTimer,
+ // Cross-domain detection vars
+ loc = document.location,
+ protocol = loc.protocol || "http:",
+ parts,
+ // The jXHR state
+ state = 0,
+ // Loop variable
+ i,
+ // Fake xhr
+ jXHR = {
+
+ readyState: 0,
+
+ // Caches the header
+ setRequestHeader: function( name, value ) {
+ if ( state === 0 ) {
+ requestHeaders[ name.toLowerCase() ] = value;
+ }
+ return this;
+ },
+
+ // Raw string
+ getAllResponseHeaders: function() {
+ return state === 2 ? responseHeadersString : null;
+ },
+
+ // Builds headers hashtable if needed
+ getResponseHeader: function( key ) {
+ var match;
+ if ( state === 2 ) {
+ if ( !responseHeaders ) {
+ responseHeaders = {};
+ while( ( match = rheaders.exec( responseHeadersString ) ) ) {
+ responseHeaders[ match[1].toLowerCase() ] = match[ 2 ];
+ }
+ }
+ match = responseHeaders[ key.toLowerCase() ];
+ }
+ return match || null;
+ },
+
+ // Cancel the request
+ abort: function( statusText ) {
+ statusText = statusText || "abort";
+ if ( transport ) {
+ transport.abort( statusText );
+ }
+ done( 0, statusText );
+ return this;
+ }
+ };
+
+ // Callback for when everything is done
+ // It is defined here because jslint complains if it is declared
+ // at the end of the function (which would be more logical and readable)
+ function done( status, statusText, responses, headers) {
+
+ // Called once
+ if ( state === 2 ) {
+ return;
+ }
+
+ // State is "done" now
+ state = 2;
+
+ // Clear timeout if it exists
+ if ( timeoutTimer ) {
+ clearTimeout( timeoutTimer );
+ }
+
+ // Dereference transport for early garbage collection
+ // (no matter how long the jXHR object will be used)
+ transport = undefined;
+
+ // Cache response headers
+ responseHeadersString = headers || "";
+
+ // Set readyState
+ jXHR.readyState = status ? 4 : 0;
+
+ var isSuccess,
+ success,
+ error,
+ response = responses ? ajaxHandleResponses( s, jXHR, responses ) : undefined,
+ lastModified,
+ etag;
+
+ // If successful, handle type chaining
+ if ( status >= 200 && status < 300 || status === 304 ) {
+
+ // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+ if ( s.ifModified ) {
+
+ if ( ( lastModified = jXHR.getResponseHeader( "Last-Modified" ) ) ) {
+ jQuery.lastModified[ s.url ] = lastModified;
+ }
+ if ( ( etag = jXHR.getResponseHeader( "Etag" ) ) ) {
+ jQuery.etag[ s.url ] = etag;
+ }
+ }
+
+ // If not modified
+ if ( status === 304 ) {
+
+ statusText = "notmodified";
+ isSuccess = true;
+
+ // If we have data
+ } else {
+
+ try {
+ success = ajaxConvert( s, response );
+ statusText = "success";
+ isSuccess = true;
+ } catch(e) {
+ // We have a parsererror
+ statusText = "parsererror";
+ error = "" + e;
+ }
+ }
+ } else {
+ // We extract error from statusText
+ // then normalize statusText and status for non-aborts
+ error = statusText;
+ if( status ) {
+ statusText = "error";
+ if ( status < 0 ) {
+ status = 0;
+ }
+ }
+ }
+
+ // Set data for the fake xhr object
+ jXHR.status = status;
+ jXHR.statusText = statusText;
+
+ // Success/Error
+ if ( isSuccess ) {
+ deferred.resolveWith( callbackContext, [ success, statusText, jXHR ] );
+ } else {
+ deferred.rejectWith( callbackContext, [ jXHR, statusText, error ] );
+ }
+
+ // Status-dependent callbacks
+ jXHR.statusCode( statusCode );
+ statusCode = undefined;
+
+ if ( s.global ) {
+ globalEventContext.trigger( "ajax" + ( isSuccess ? "Success" : "Error" ),
+ [ jXHR, s, isSuccess ? success : error ] );
+ }
+
+ // Complete
+ completeDeferred.resolveWith( callbackContext, [ jXHR, statusText ] );