Sending redirect in Tomcat web application behind a Apache 2 proxy (mod_proxy)

Question

I have a web application on tomcat http://localhost:8080/WebApp/

The I have configrued Apache 2 (mod_proy) so that the web application is directly acces

Answer 1

Use forwarding instead of redirection

I think your problem is the use of sendRedirect. Calling sendRedirect is actually suppose to show the browser that the URL has been redirected. If you want to hide that you need to use forwarding.In your servlet try this instead of sendRedirect.

String servletPath = request.getServletPath();
if(servletPath.equals("/app1")){
     ServletContext ctx = request.getServletContext().getContext("/app1");
     RequestDispatcher dispatcher=ctx.getServletContext().getRequestDispatcher( "/app1/app1.html" ); // or wherever you actually keep app1.html
     dispatcher.forward( request, response );
} 

Inside your context.xml set crossContext = "true" so you can forward requests to other web applications.