code: protected String getResponseUrl(final HttpServletRequest request) {
  		String suffix = getServlet().getServletConfig().getInitParameter(ONGOING_URL_SUFFIX);
  		String uri = request.getRequestURI();
  
  		if (suffix != null && uri.contains(suffix)) {
  			return uri + suffix;
  		} else {
  			return uri;
  		}
  	}
docs: Get the URL that responses should be directed to (ie, the URL in forms and hyperlinks). This is usually the same
  as the current request URL.
  
  @param request the incoming HttpServletRequest
  @return the URL that will be used in the form's action attribute and also in hyperlinks