+ 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(),
+ // 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,
+ 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
+ // (match is used internally)
+ getResponseHeader: function( key , match ) {
+
+ if ( state === 2 ) {
+
+ if ( responseHeaders === undefined ) {
+
+ responseHeaders = {};
+
+ if ( typeof responseHeadersString === "string" ) {
+
+ while( ( match = rheaders.exec( responseHeadersString ) ) ) {
+ responseHeaders[ match[ 1 ].toLowerCase() ] = match[ 2 ];
+ }
+ }
+ }
+ match = responseHeaders[ key.toLowerCase() ];
+
+ } else {
+
+ match = null;
+ }
+
+ return match;
+ },
+
+ // 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 , response , headers) {
+
+ // Called once
+ if ( state === 2 ) {
+ return;
+ }
+
+ // State is "done" now
+ state = 2;
+
+ // Dereference transport for early garbage collection
+ // (no matter how long the jXHR transport will be used
+ transport = 0;
+
+ // 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;
+
+ // 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 ) {
+
+ 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 not modified
+ if ( status === 304 ) {
+
+ // Set the statusText accordingly
+ statusText = "notmodified";
+ // Mark as a success
+ isSuccess = 1;
+
+ // If we have data
+ } else {
+
+ // Set the statusText accordingly
+ statusText = "success";
+
+ // 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 dataType
+ current,
+ // Previous dataType
+ prev,
+ // Conversion function
+ conv,
+ // Conversion functions (when text is used in-between)
+ conv1,
+ conv2,
+ // Local references to dataTypes & converters
+ dataTypes = s.dataTypes,
+ converters = s.converters,
+ // DataType to responseXXX field mapping
+ responses = {
+ "xml": "XML",
+ "text": "Text"
+ };
+
+ // For each dataType in the chain
+ for( i = 0 ; i < dataTypes.length ; i++ ) {
+
+ current = dataTypes[ i ];
+
+ // If a responseXXX field for this dataType exists
+ // and if it hasn't been set yet
+ if ( responses[ current ] ) {
+ // Set it
+ jXHR[ "response" + responses[ current ] ] = response;
+ // Mark it as set
+ responses[ current ] = 0;
+ }
+
+ // If this is not the first element
+ if ( i ) {
+
+ // Get the dataType to convert from
+ prev = dataTypes[ i - 1 ];
+
+ // If no catch-all and dataTypes are actually different
+ if ( prev !== "*" && current !== "*" && prev !== current ) {
+
+ // Get the converter
+ conv = converters[ prev + " " + current ] ||
+ converters[ "* " + current ];
+
+ conv1 = conv2 = 0;
+
+ // If there is no direct converter and none of the dataTypes is text
+ if ( ! conv && prev !== "text" && current !== "text" ) {
+ // Try with text in-between
+ conv1 = converters[ prev + " text" ] || converters[ "* text" ];
+ conv2 = converters[ "text " + current ];
+ // Revert back to a single converter
+ // if one of the converter is an equivalence
+ if ( conv1 === true ) {
+ conv = conv2;
+ } else if ( conv2 === true ) {
+ conv = conv1;
+ }
+ }
+ // If we found no converter, dispatch an error
+ if ( ! ( conv || conv1 && conv2 ) ) {
+ throw conversion;
+ }
+ // If found converter is not an equivalence
+ if ( conv !== true ) {
+ // Convert with 1 or 2 converters accordingly
+ response = conv ? conv( response ) : conv2( conv1( response ) );
+ }
+ }
+ // If it is the first element of the chain
+ // and we have a dataFilter
+ } else if ( s.dataFilter ) {
+ // Apply the dataFilter
+ response = s.dataFilter( response , current );
+ // Get dataTypes again in case the filter changed them
+ dataTypes = s.dataTypes;
+ }
+ }
+ // End of loop
+
+ // We have a real success
+ success = response;
+ isSuccess = 1;
+
+ // If an exception was thrown
+ } catch(e) {
+
+ // We have a parsererror
+ statusText = "parsererror";
+ error = "" + e;
+
+ }
+ }
+
+ // if not success, mark it as an error
+ } else {
+
+ error = statusText = statusText || "error";
+
+ // Set responseText if needed
+ if ( response ) {
+ jXHR.responseText = response;
+ }
+ }
+
+ // 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 ] );
+ }
+
+ // Status-dependent callbacks
+ jXHR.statusCode( statusCode );
+
+ 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" );
+ }
+ }