Unable to reset session with JavaScript on JSP page

Created a session from the login.jsp page using a servlet

String msg = "";
        HttpSession sess = request.getSession();
       // if(sess != null)

        //sess.invalidate();
        if (sess.getId() != null) {
            sess.setAttribute("uname", uname);
            sess.setAttribute("pwd", pwd);
        }

Retrieved the session in another JSP page using:

<b> Welcome ${uname}</b>

Logout hyperlink:

<a href="login_ml.jsp" id="logout_link" onclick='lgt()'>Logout</a></td>

Javascript function to clear session:

function lgt(){
                var logout = document.getElementById("logout_link");
                logout.session.clear();
                alert("logout");
                }
javascriptjavajspsessionservlets

Answer №1

Clearing a session directly from JS code is not possible. You must initiate a call to another JSP page that will handle the session invalidation:

Javascript Function :

 function destroySession() {
        window.location = "killSession.jsp";
   }

killSession.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Log out</title>
</head>
<body>
<%
session.invalidate();
%>
User has been Logged out successfully!!!!
</body>
</html>

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