- if ( type === "json" ) {
- if ( typeof JSON === "object" && JSON.parse ) {
- data = JSON.parse( data );
+ if ( type === "json" || !type && ct.indexOf("json") >= 0 ) {
+ // Try to use the native JSON parser first
+ if ( window.JSON && window.JSON.parse ) {
+ data = window.JSON.parse( data );
+
+ // Make sure the incoming data is actual JSON
+ // Logic borrowed from http://json.org/json2.js
+ } else if (/^[\],:{}\s]*$/.test(data.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, "@")
+ .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, "]")
+ .replace(/(?:^|:|,)(?:\s*\[)+/g, ""))) {
+ data = (new Function("return " + data))();
+