How to check Server side whether session is time out or not?

Question

As I am new to Sitecore and working on session time out functionality in Sitecore. Instead of redirecting to login page I've to display session time out warning message to end user and How to validate at server side whether user session is timeout or not?

How can this be achieved in Sitecore? Can it be done in Sitecore as same as normal ASP.net session timeout as below ?

if(Session["mykey"] != null)
{
  // Session is not expired
}
else
{
  //Session is expired
}

What is a better approach to implement it?

If there is any source related to better approach to validate session time out in Sitecore, Please provide blogs/articles. Any suggestion would be very helpful.

Thanks & Regards.

Answer 1

Yes - Sitecore is just an ASP.Net web application, so session works just the same. The same rules apply as any other .net web application.

Your method is one way to check that, you could also check the HttpContext.Current.Session.IsNewSession along with a check on existence of the session cookie like this:

public static bool IsSessionExpired()
{
    if (HttpContext.Current.Session != null)
    {
        if (HttpContext.Current.Session.IsNewSession)
        {
            string CookieHeaders = HttpContext.Current.Request.Headers["Cookie"];

            if ((null != CookieHeaders) && (CookieHeaders.IndexOf("ASP.NET_SessionId") >= 0))
            {
                // IsNewSession is true, but session cookie exists,
                // so, ASP.NET session is expired
                return true;
            }
        }
    }
}

Reference: http://www.beansoftware.com/ASP.NET-Tutorials/Find-If-Session-Expired.aspx