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 between servers, sometimes it is encoded only once.

I want to check that if the URL is still encoded after calling the method decodeURIComponent. How can I do that? Any pointer would be very helpful to me.

Update - 1

If I recursively call a method and check that if the given URL still contains %, if it contains % then decode it and call the method again; and if not return it to the caller, will that work?

Update - 2

For my case I have:

callBackUrl=http%253A%252F%252Fadbc.com%252FPOSM%252Fapp%252Fpages%252Fadf.task-flow%253Fadf.tfDoc%253D%25252FWEB-INF%25252Ftask-flows%25252Fcatalog-edit-task-flow.xml%2526adf.tfId%253Dcatalog%2526_adf.ctrl-state%253Db9akorh22_9%2526articleReference%253D10C00135%2526previousView%253Dcatalog-home%2526fromUCM%253Dtrue%2526articleType%253Dposm%2526developer%253Dcentral

Now I am taking the value of the callBackUrl in my js method, then decoding it and firing window.open() with that decoded URL. the parameters are same and it has:

• adf.tfDoc


• adf.tfId


• articleReference


• previousView


• fromUCM


• articleType


• developer

Parameters into it. So I know there is no query string like value=%...

Update - 3

I have written the following method:

var decodeURLRecursively = function(url) {

    if(url.indexOf('%') != -1) {

        return decodeURLRecursively(decodeURIComponent(url));

    }



    return url;

}