如何格式化此Ajax响应数据？

Question

I am new to ajax and managed to get cross domain ajax response data using a proxy. Here is the output

  {"error":"\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n \r\n\t\t
   You entered invalid Roll-Number, Please enter valid Roll Number.
  \r\n"}

How do I format it to get rid of everything except "You entered invalid Roll-Number, Please enter valid Roll Number"

EDIT: Is there some valid json function to format it or I do it through javascript?

SOLUTION FOUND:

Since it is valid JSON data I could use eval function to process it:

eval("var jsonDataFormatted =   ("+XMLHttpRequestObject.responseText+")");
console.log(jsonDataFormatted.error);

Answer 1

The problem should be solved with javascript

Let's say you have your data in a variable called data

data = {"error":"\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n \r\n\t\t You entered invalid Roll-Number, Please enter valid Roll Number.\r\n"}

All you need to do is to trim the string so that you can remove spaces in the begining or in the end

data.error = data.error.trim();

Update

If the solution you have found is eval then you better avoid it, this solution may help you

var jsonDataFormatted = JSON.parse(XMLHttpRequestObject.responseText);
console.log(jsonDataFormatted.error);