How to decode Feedburner result containing \x3c and so on

Question

Feed burner changed their blog service return results that it returns blocks of javascript similar to:

document.write(\"\\x3cdiv class\\x3d\\x22feed

Answer 1

Those look like ASCII values, encoded in hex. You could traverse the string, and whenever you find a \x followed by two hexadecimal digits (0-9,a-f), replace it with the corresponding ASCII character. If the string is long, it would be faster to save the result incrementally to a StringBuilder instead of using String.Replace().

I don't know the encoding specification, but there might be more rules to follow (for example, if \\ is an escape character for a literal \).