解析 JSON-RPC 响应 jquery 未定义

Parsing JSON-RPC response with jquery undefined

简而言之,我需要从下面的json字符串

中获取文件名
{"jsonrpc" : "2.0", "result" : {"cleanFileName": "1430648069-img003.jpg"}, "id" : "id"}

代码如下:

 init: {
        // FileUploaded is called when a file has been uploaded, and contains all info about the file
        FileUploaded: function(up, file, info) {
           var obj = JSON.parse(info.response);
           alert(obj.cleanFileName); 
        }
    }

我想我可以使用下面的方法来获取 cleanFileName

var obj = JSON.parse(info.response);

           alert(obj.cleanFileName);

这只是给了我一个未定义的警报,我错过了什么?

alert (obj['result']['cleanFileName']);