title: Servlet request blocking
body: <p>I have a Filter which scans all the request going through my application. I want to block a request if it requests for a specific url. I can able to check this and if the condition matches I am NOT doing chain.doFilter, but still the request moves to a black page. How can I block this request from going any further and stay in the current page - meaning user should not see any change to the screen that he clicked?</p>