Stop further processing when redirecting in a filter
I have URLRewirteFilter which checks if requested domain starts with www. and redirects to no-www url. How can I stop futher processing (invoking JSF app, call servlets etc.) when request is to be redirected? So far I have this:
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
String sn = req.getServerName().toLowerCase();
if (sn.startsWith("www.")) {
String url = "http://" + getDefaultDomain() + req.getContextPath() + req.getRequestURI();
HttpServletResponse resp = (HttpServletResponse) response;
resp.reset();
resp.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
resp.setHeader("Location", url);
}
chain.doFilter(request, response);
}
Answer
Just either add a return statement to the end of the if
if (sn.startsWith("www.")) {
String url = "http://" + getDefaultDomain() + req.getContextPath() + req.getRequestURI();
HttpServletResponse resp = (HttpServletResponse) response;
resp.reset();
resp.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
resp.setHeader("Location", url);
return;
}
chain.doFilter(request, response);
or add an else
if (sn.startsWith("www.")) {
String url = "http://" + getDefaultDomain() + req.getContextPath() + req.getRequestURI();
HttpServletResponse resp = (HttpServletResponse) response;
resp.reset();
resp.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
resp.setHeader("Location", url);
} else {
chain.doFilter(request, response);
}