Employing JavaScript for session verification in JSP pages

I successfully implemented session activation and deactivation in my servlets as shown below:

HttpSession s = request.getSession(); 
s.setAttribute("uname", uname);

I deactivate the session in my logout servlet using:

HttpSession sess=  request.getSession();
sess.invalidate();

Now, I am looking to verify the session status in my JSP page using JavaScript. I have a method that uses JSP code for this purpose, but I want to achieve it using a JavaScript function instead. The idea is to reload the same page if the session is active or redirect to login.jsp if the session has expired. However, I'm struggling to find a solution for this at the moment.

javajavascriptjspsessionservlets

Answer №1

In the case of tomcat webservers, sessions are typically maintained by a cookie named JSESSIONID. However, just because this cookie is set doesn't guarantee that the session is still valid. The server is the only entity that can confirm whether a session is authentic or not. Therefore, it's best practice to handle redirects on the server side.

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