+
+ // 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 ) {
+ if ( transport ) {
+ transport.abort( statusText || "abort" );
+ }
+ 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 = ( statusText = statusText || "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;
+ }
+ }
+ }
+
+ // 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 ] );
+
+ if ( s.global ) {
+ globalEventContext.trigger( "ajaxComplete", [ jXHR, s] );
+ // Handle the global AJAX counter
+ if ( !( --jQuery.active ) ) {
+ jQuery.event.trigger( "ajaxStop" );
+ }
+ }
+ }
+
+ // Attach deferreds
+ deferred.promise( jXHR );
+ jXHR.success = jXHR.done;
+ jXHR.error = jXHR.fail;
+ jXHR.complete = completeDeferred.done;
+
+ // Status-dependent callbacks
+ jXHR.statusCode = function( map ) {
+ if ( map ) {
+ var tmp;
+ if ( state < 2 ) {
+ for( tmp in map ) {
+ statusCode[ tmp ] = [ statusCode[tmp], map[tmp] ];
+ }
+ } else {
+ tmp = map[ jXHR.status ];
+ jXHR.then( tmp, tmp );
+ }
+ }
+ return this;
+ };
+
+ // Remove hash character (#7531: and string promotion)
+ // We also use the url parameter if available
+ s.url = ( "" + ( url || s.url ) ).replace( rhash, "" );
+
+ // Extract dataTypes list
+ s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().split( rspacesAjax );
+
+ // Determine if a cross-domain request is in order
+ if ( !s.crossDomain ) {
+ parts = rurl.exec( s.url.toLowerCase() );
+ s.crossDomain = !!(
+ parts &&
+ ( parts[ 1 ] && parts[ 1 ] != protocol ||
+ parts[ 2 ] != loc.hostname ||
+ ( parts[ 3 ] || ( ( parts[ 1 ] || protocol ) === "http:" ? 80 : 443 ) ) !=
+ ( loc.port || ( protocol === "http:" ? 80 : 443 ) ) )
+ );
+ }
+
+ // Convert data if not already a string
+ if ( s.data && s.processData && typeof s.data !== "string" ) {
+ s.data = jQuery.param( s.data, s.traditional );
+ }
+
+ // Apply prefilters
+ inspectPrefiltersOrTransports( prefilters, s, options );
+
+ // Uppercase the type
+ s.type = s.type.toUpperCase();
+
+ // Determine if request has content
+ s.hasContent = !rnoContent.test( s.type );
+
+ // Watch for a new set of requests
+ if ( s.global && jQuery.active++ === 0 ) {
+ jQuery.event.trigger( "ajaxStart" );
+ }
+
+ // More options handling for requests with no content
+ if ( !s.hasContent ) {
+
+ // If data is available, append data to url
+ if ( s.data ) {
+ s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.data;
+ }
+
+ // Add anti-cache in url if needed
+ if ( s.cache === false ) {
+
+ var ts = jQuery.now(),
+ // try replacing _= if it is there
+ ret = s.url.replace( rts, "$1_=" + ts );
+
+ // if nothing was replaced, add timestamp to the end
+ s.url = ret + ( (ret === s.url ) ? ( rquery.test( s.url ) ? "&" : "?" ) + "_=" + ts : "" );
+ }
+ }
+
+ // Set the correct header, if data is being sent
+ if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
+ requestHeaders[ "content-type" ] = s.contentType;
+ }
+
+ // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+ if ( s.ifModified ) {
+ if ( jQuery.lastModified[ s.url ] ) {
+ requestHeaders[ "if-modified-since" ] = jQuery.lastModified[ s.url ];
+ }
+ if ( jQuery.etag[ s.url ] ) {
+ requestHeaders[ "if-none-match" ] = jQuery.etag[ s.url ];
+ }
+ }
+
+ // Set the Accepts header for the server, depending on the dataType
+ requestHeaders.accept = s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[0] ] ?
+ s.accepts[ s.dataTypes[0] ] + ( s.dataTypes[ 0 ] !== "*" ? ", */*; q=0.01" : "" ) :
+ s.accepts[ "*" ];
+
+ // Check for headers option
+ for ( i in s.headers ) {
+ requestHeaders[ i.toLowerCase() ] = s.headers[ i ];
+ }
+
+ // Allow custom headers/mimetypes and early abort
+ if ( s.beforeSend && ( s.beforeSend.call( callbackContext, jXHR, s ) === false || state === 2 ) ) {
+ // Abort if not done already
+ done( 0, "abort" );
+ // Return false
+ jXHR = false;
+
+ } else {
+
+ // Install callbacks on deferreds
+ for ( i in { success: 1, error: 1, complete: 1 } ) {
+ jXHR[ i ]( s[ i ] );
+ }
+
+ // Get transport
+ transport = inspectPrefiltersOrTransports( transports, s, options );
+
+ // If no transport, we auto-abort
+ if ( !transport ) {
+ done( 0, "notransport" );
+ } else {
+ // Set state as sending
+ state = jXHR.readyState = 1;
+ // Send global event
+ if ( s.global ) {
+ globalEventContext.trigger( "ajaxSend", [ jXHR, s ] );
+ }
+ // Timeout
+ if ( s.async && s.timeout > 0 ) {
+ timeoutTimer = setTimeout( function(){
+ jXHR.abort( "timeout" );
+ }, s.timeout );
+ }
+
+ try {
+ transport.send( requestHeaders, done );
+ } catch (e) {
+ // Propagate exception as error if not done
+ if ( status === 1 ) {
+ done( 0, "error", "" + e );
+ jXHR = false;
+ // Simply rethrow otherwise
+ } else {
+ jQuery.error( e );
+ }
+ }
+ }
+ }
+ return jXHR;