How to get previous URL?

Question

I need the URL from which my web app is called. For eg:- If there is a link to my site foo.com from stackoverflow.com, I need the stackoverflow link in web app(managed bean).

All helps appreciated, thanks.

Answer 1

Not always filled, but you can use:

HttpServletRequest.getHeader("Referer");

Note: The spelling error is on purpose. For an explanation see here.