else if(action.equals("accepter")) {
int id_defi = Integer.valueOf(request.getParameter("id_defi"));
int mise = Integer.valueOf(request.getParameter("mise"));
int retard = Integer.valueOf(request.getParameter("retard"));
if(utilisateur.accepterDefi(id_defi, mise, retard))
out.print("{}");
else
response.setStatus(598);
}
else if(action.equals("refuser")) {