throws ServletException, IOException {
FtpServer server = (FtpServer) getServletContext().getAttribute(FtpServerListener.FTPSERVER_CONTEXT_NAME);
if(req.getParameter("stop") != null) {
server.stop();
} else if(req.getParameter("resume") != null) {
server.resume();
} else if(req.getParameter("suspend") != null) {
server.suspend();
}