+ options = url;
+ url = options ? options.url : undefined;
+ }
+
+ // Force options to be an object
+ options = options || {};
+
+ // Get the url if provided separately
+ options.url = url || options.url;
+
+ // Create the final options object
+ s = jQuery.extend( true , {} , jQuery.ajaxSettings , options );
+
+ // We force the original context
+ // (plain objects used as context get extended)
+ s.context = options.context;
+
+ var // jQuery lists
+ jQuery_lastModified = jQuery.lastModified,
+ jQuery_etag = jQuery.etag,
+ // Callbacks contexts
+ callbackContext = s.context || s,
+ globalEventContext = s.context ? jQuery( s.context ) : jQuery.event,
+ // Deferreds
+ deferred = jQuery.Deferred(),
+ completeDeferred = jQuery._Deferred(),
+ // Headers (they are sent all at once)
+ requestHeaders = {},
+ // Response headers
+ responseHeadersString,
+ responseHeaders,
+ // transport
+ transport,
+ // timeout handle
+ timeoutTimer,
+ // 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
+ // (match is used internally)
+ getResponseHeader: function( key , match ) {
+
+ if ( state !== 2 ) {
+ return null;
+ }
+
+ if ( responseHeaders === undefined ) {
+
+ responseHeaders = {};
+
+ if ( typeof responseHeadersString === "string" ) {
+
+ while( ( match = rheaders.exec( responseHeadersString ) ) ) {
+ responseHeaders[ match[ 1 ].toLowerCase() ] = match[ 2 ];
+ }
+ }
+ }
+ return responseHeaders[ key.toLowerCase() ];
+ },
+
+ // Cancel the request
+ abort: function( statusText ) {
+ if ( transport && state !== 2 ) {
+ 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 , response , headers) {
+
+ // Called once
+ if ( state === 2 ) {
+ return;
+ }
+
+ // State is "done" now
+ state = 2;
+
+ // Set readyState
+ jXHR.readyState = status ? 4 : 0;
+
+ // Cache response headers
+ responseHeadersString = headers || "";
+
+ // Clear timeout if it exists
+ if ( timeoutTimer ) {
+ clearTimeout(timeoutTimer);
+ }
+
+ var // Reference url
+ url = s.url,
+ // and ifModified status
+ ifModified = s.ifModified,
+
+ // Is it a success?
+ isSuccess = 0,
+ // Stored success
+ success,
+ // Stored error
+ error = statusText;
+
+ // If not timeout, force a jQuery-compliant status text
+ if ( statusText != "timeout" ) {
+ statusText = ( status >= 200 && status < 300 ) ?
+ "success" :
+ ( status === 304 ? "notmodified" : "error" );
+ }
+
+ // If successful, handle type chaining
+ if ( statusText === "success" || statusText === "notmodified" ) {
+
+ // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+ if ( s.ifModified ) {
+
+ var lastModified = jXHR.getResponseHeader("Last-Modified"),
+ etag = jXHR.getResponseHeader("Etag");
+
+ if (lastModified) {
+ jQuery_lastModified[ s.url ] = lastModified;
+ }
+ if (etag) {
+ jQuery_etag[ s.url ] = etag;
+ }
+ }
+
+ if ( s.ifModified && statusText === "notmodified" ) {
+
+ success = null;
+ isSuccess = 1;
+
+ } else {
+ // Chain data conversions and determine the final value
+ // (if an exception is thrown in the process, it'll be notified as an error)
+ try {
+
+ var i,
+ current,
+ prev,
+ checker,
+ conv1,
+ conv2,
+ oneConv,
+ convertion,
+ dataTypes = s.dataTypes,
+ dataConverters = s.dataConverters,
+ responses = {
+ "xml": "XML",
+ "text": "Text"
+ };
+
+ for( i = 0 ; i < dataTypes.length ; i++ ) {
+
+ current = dataTypes[ i ];
+
+ if ( responses[ current ] ) {
+ jXHR[ "response" + responses[ current ] ] = response;
+ responses[ current ] = 0;
+ }
+
+ if ( i ) {
+
+ prev = dataTypes[ i - 1 ];
+
+ if ( prev !== "*" && current !== "*" && prev !== current ) {
+
+ oneConv = conv1 =
+ dataConverters[ ( conversion = prev + " " + current ) ] ||
+ dataConverters[ "* " + current ];
+
+ if ( oneConv !== true ) {
+
+ if ( ! oneConv && prev !== "text" && current !== "text" ) {
+ conv1 = dataConverters[ prev + " text" ] || dataConverters[ "* text" ];
+ conv2 = dataConverters[ "text " + current ];
+ }
+
+ if ( oneConv || conv1 && conv2 ) {
+ response = oneConv ? conv1( response ) : conv2( conv1( response ) );
+ } else {
+ throw "no " + conversion;
+ }
+ }
+ }
+ } else if ( s.dataFilter ) {
+
+ response = s.dataFilter( response );
+ dataTypes = s.dataTypes;
+ }
+ }
+
+ // We have a real success
+ success = response;
+ isSuccess = 1;
+
+ } catch(e) {
+
+ statusText = "parsererror";
+ error = "" + e;
+
+ }
+ }
+
+ } else { // if not success, mark it as an error
+
+ error = error || statusText;
+ }
+
+ // Set data for the fake xhr object
+ jXHR.status = status;
+ jXHR.statusText = statusText;
+
+ // Success/Error
+ if ( isSuccess ) {
+ deferred.fire( callbackContext , [ success , statusText , jXHR ] );
+ } else {
+ deferred.fireReject( callbackContext , [ jXHR , statusText , error ] );
+ }
+
+ if ( s.global ) {
+ globalEventContext.trigger( "ajax" + ( isSuccess ? "Success" : "Error" ) ,
+ [ jXHR , s , isSuccess ? success : error ] );
+ }
+
+ // Complete
+ completeDeferred.fire( 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
+ jXHR.success = jXHR.then = deferred.then;
+ jXHR.error = jXHR.fail = deferred.fail;
+ jXHR.complete = completeDeferred.then;
+
+ // Remove hash character (#7531: and string promotion)
+ s.url = ( "" + s.url ).replace( rhash , "" );
+
+ // Uppercase the type
+ s.type = s.type.toUpperCase();
+
+ // Determine if request has content
+ s.hasContent = ! rnoContent.test( s.type );
+
+ // Extract dataTypes list
+ s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().split( /\s+/ );
+
+ // Determine if a cross-domain request is in order
+ var parts = rurl.exec( s.url.toLowerCase() ),
+ loc = location;
+ s.crossDomain = !!( parts && ( parts[ 1 ] && parts[ 1 ] != loc.protocol || parts[ 2 ] != loc.host ) );
+
+ // Convert data if not already a string
+ if ( s.data && s.processData && typeof s.data != "string" ) {
+ s.data = jQuery.param( s.data , s.traditional );
+ }
+
+ // Watch for a new set of requests
+ if ( s.global && jQuery.active++ === 0 ) {
+ jQuery.event.trigger( "ajaxStart" );