@Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        
        FtpServer server = (FtpServer) getServletContext().getAttribute(FtpServerListener.FTPSERVER_CONTEXT_NAME);
        
        PrintWriter wr = resp.getWriter();
        
        wr.print("<html>");
        wr.print("<head>");
        wr.print("<title>FtpServer status servlet</title>");
        wr.print("</head>");
        wr.print("<body>");
        wr.print("<form method='post'>");
        if(server.isStopped()) {
            wr.print("<p>FtpServer is stopped.</p>");
        } else {
            if(server.isSuspended()) {
                wr.print("<p>FtpServer is suspended.</p>");
                wr.print("<p><input type='submit' name='resume' value='Resume'></p>");
                wr.print("<p><input type='submit' name='stop' value='Stop'></p>");
            } else {
                wr.print("<p>FtpServer is running.</p>");