[JSP/Servlet] Faire patienter

Bon, je crois que je tiens le bon bout ;)
Voici ma servlet de patience :

Code:

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package com.bioxpr.servlet;
 
import java.io.IOException;
 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
public class Wait extends HttpServlet {
 
	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException{
		doPost(request, response);
	}
 
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html");
		java.io.PrintWriter pw = response.getWriter();
		javax.servlet.http.HttpSession session = request.getSession(true);
		if ( session.getAttribute("waitPage") == null ) {
			session.setAttribute("waitPage", Boolean.TRUE);
 
	        pw.println( "<html><head>" );
	        pw.println( "<meta http-equiv=\"Refresh\" content=\"0\"></head><body>" );
	        pw.print("<img src=\"img/wait_a.gif\" alt=\"We are waiting !\">");
		}
		else{
			session.setAttribute("waitPage", null);
			javax.servlet.RequestDispatcher rd = request.getRequestDispatcher("Processing");
			rd.forward(request, response);
		}
	}
 
}

Sachant bien sûr que Processing est ma page de traitement ;)
Oualà :D

@++