How to know if a URL is decoded/encoded?

Question

I am using Javascript method decodeURIComponent to decode an encoded URL. Now I am having an issue, that sometimes the URL is get encoded twice during redirection b

Answer 1

There is really simple and fast and trusted way to know if a URL string is encoded or Not.

For Example: decodeURIComponent(decodeURIComponent(encodeURIComponent("SWQgPSA0NjI%3D"))) <> "SWQgPSA0NjI=" ----> Not equal to orginal value then Already encoded

just this code:

  var encValue = encodeURIComponent(Value);
    try {
         if (decodeURIComponent(decodeURIComponent(encValue)) === Value) {
          //not encodec yet...so return encoded of val
          return encValue;
         }
       } catch (err) {
           //not encodec yet...so return encoded of val
           return encValue;
       }

 return Value  //same value returned