correction enregistrement nouvel user, login et mdp obligatoires

WEB-INF/src/controleurs/SignUp.java

@@ -20,8 +20,9 @@ public class SignUp extends HttpServlet {
         String login = req.getParameter("login");
         String pwd = req.getParameter("pwd");
 
-        if (login == null || pwd == null) {
-            out.println("<h1>Erreur</h1>");
+        if (login.equals("")) out.println("<h1>Invalid Login</h1><button><a href=\"http://localhost:8080/s4a021-web-backend/create.html\">Go Back</a></button>");
+        else if (pwd.equals("")) {out.println("<h1>Invalid Password</h1><button><a href=\"http://localhost:8080/s4a021-web-backend/create.html\">Go Back</a></button>");
+
         }
         else {
             userdao.createUser(login, pwd);
@@ -30,6 +31,7 @@ public class SignUp extends HttpServlet {
             if (user != null && userdao.isDatabased(user)){
                 out.println("<h1>Bienvenue " + user.getUserName() + " !</h1>");
                 req.getSession().setAttribute("user", user);
+                req.getSession().setAttribute("login", login);
                 res.sendRedirect("http://localhost:8080/s4a021-web-backend/Welcome");
             }else{
                 out.println("<h1>Partez de chez moi ?!</h1>");