public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
RequestCapture reqCapture = new RequestCapture((HttpServletRequest) request);
ResponseCapture respCapture = new ResponseCapture((HttpServletResponse) response);
RackEnvironment env = new ServletRackEnvironment(reqCapture, context);
RackResponseEnvironment responseEnv = new ServletRackResponseEnvironment(respCapture);
request.setAttribute(RackEnvironment.DYNAMIC_REQS_ONLY, Boolean.TRUE);
dispatcher.process(env, responseEnv);
if (respCapture.isError()) {