Question

I would like to store the login, logout and duration time in database.

• The login time is created when the user is authenticated(successfully logged in)
• The logout time is created when the user clicks the logout button
• The duration is logout – login time. (logout minus login)

But the problem is, what if the user didnt click the logout button. Here are the situations:

• Internet loss
• Close the browser/tab. (I need this must use javascript, but i donnu how to do it, any idea?)

EDIT:

I forgot to add something to the question, the program is a full flash program, there is no navigation to other page. Only 1 page

Answer 1

You can’t rely on receiving an event for the user logging out, if they simply close their browser, or disappear from the internet.

In this case you’ll have to have a session timeout of some kind, and record the logout when your app realises their session is too old.

If this is a real requirement, then I’d say you need a “cron” job monitoring the sessions for timeout. When a session has timed out, if the were logged on, it then records a “logout” event for that user.

Note that you can’t use (for example) ASPNET’s Session_End event, because that won’t be reliably called either (for example if the server process restarts).

Another option is to add the logout time next time that user logs on – when they log on, you check for old sessions and assume that any which weren’t closed lasted for a fixed amount of time since the last page hit.

That’s really all you can do.