Session checking using javascript in jsp

Question

I have done session activation and deactivation using servlets using

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

and deactivation in logout servlet using

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

Now I want to check in my JSP page that is session is activate or not?
So for this I want this checking using JavaScript . I have method to check this using simple JSP code but I want this using JavaScript's function. So that if session is activate then I will reload same page and if session is expired then it will redirect to the login.jsp page. So I could not get any idea about it.

you write a code to check the session in servlet and make ajax call to that servlet..I hope u get it. — Sanjay Rabari, Apr 14 '14 at 08:07
Sorry but i don't know how to call servlet using ajax. @SanjayRajjadi — Ronak Joshi, Apr 14 '14 at 08:08
you will have some idea from this post http://stackoverflow.com/questions/9788798/call-servlet-from-ajax — Sanjay Rabari, Apr 14 '14 at 08:12
But its not working properly. Any other link for this? @SanjayRajjadi — Ronak Joshi, Apr 15 '14 at 13:19

score 0 · Answer 1 · answered Apr 14 '14 at 07:44

0

As for tomcat webservers the session is usually mantained by a cookie with name JSESSIONID. However from that cookie being set you can not be sure that the session is still valid. The only one who can tell you, having a valid session or not is the server. So it'll be better to do the redirect on the server.

answered Apr 14 '14 at 07:44

Markus

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But i want check on my jsp page using javascript, so can you please elaborate answer or give me any example or link that will help me to understand this. Thanks @Markus – Ronak Joshi Apr 14 '14 at 08:07

Session checking using javascript in jsp

1 Answers1