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How can I redirect user to login page when session times out?

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    How can I redirect user to login page when session times out?

    I did some searches on this, but cannot seem to find an answer.

    If I set a session lifetime for 8 hours (or 2 hours, or 36 hours), and the session times out, the user often sees a red error message if they go to a component which uses a session variable for a filter.
    I would like to automatically send the user to the login page when the session times out.
    Is that possible?
    Thanks,
    Jay
    Jay Talbott
    Lexington, KY


    #2
    Re: How can I redirect user to login page when session times out?

    that is a standard option under web security configuration, look for login timeout.
    Steve Wood
    See my profile on IADN

    Comment


      #3
      Re: How can I redirect user to login page when session times out?

      Thanks, Steve, and maybe I am being too picky, but if the user tries to run a query and the session variables are gone, the error is encountered. If the user tries to reload the page, it does return to the login screen, but unless the page is reloaded, the error is encountered.
      Jay
      Last edited by Jay Talbott; 12-31-2013, 03:59 PM.
      Jay Talbott
      Lexington, KY

      Comment


        #4
        Re: How can I redirect user to login page when session times out?

        Hello Jay,

        This is definitely possible as I have been using this method for a couple of years now.
        I set a session timeout of 120 minutes using a countdown counter. When the session times out, the user is automatically logged out and redirected to the login page.
        I set the session timeout on the server slightly longer (130 minutes I think) so that the server doesn't timeout before my counter.
        Some code is required to stop the browser caching the page and prevent the user from simply clicking the back button to log back in.
        I'm using a tabbedui and display the session time remaining in the header. If the user doesn't want the session to timeout they can simply F5 to refresh the page.

        Here's what it looks like, look in the top left corner:

        Session Timer.jpg

        The timer code goes in the head section of my home page (credit to Carole King)

        Code:
        <table><tr><td>Logged In: <%a5 ?session.current_user_fname %>&nbsp;<%a5 ?session.current_user_lname %>&nbsp;<a href="logout.a5w"><font color=#0000ff>(Logout)</font>
        <font color=#ffffff></td></tr></table>
        
        <script language="javascript">
        <!-- Begin
        // Take user here after session timed out
        timedouturl = "Login.a5w";
        
        function Minutes(data) {
        for (var i = 0; i < data.length; i++)
        if (data.substring(i, i + 1) == ":")
        break;
        
        return (data.substring(0, i));
        }
        
        function Seconds(data) {
        for (var i = 0; i < data.length; i++)
        if (data.substring(i, i + 1) == ":")
        break;
        
        return (data.substring(i + 1, data.length));
        }
        
        function Display(min, sec) {
        var disp;
        if (min <= 9) disp = " 0";
        else disp = " ";
        disp += min + ":";
        if (sec <= 9) disp += "0" + sec;
        else disp += sec; 
        return (disp);
        }
        
        function Down() { 
        sec--;      
        if (sec == -1) { sec = 59; min--; }
        document.getElementById("clock1").value = Display(min, sec);
        
        //window.status = "Session will time out in: " + Display(min, sec);
        if (min == 10 && sec == 00) {
        //alert("Your session will time out soon.  Make sure work is saved.  You can extend your session time by refreshing your browser.");
        down = setTimeout("Down()", 1000);
        }
        
        else if (min == 0 && sec == 0) {
        alert("Your session has timed out.  You will be redirected and can Log In again, if needed.  Thank You.");
        window.location.href = timedouturl;
        }
        
        else down = setTimeout("Down()", 1000);
        }
        
        function timeIt() {
        min = 1 * Minutes(document.getElementById("clock1").value);
        sec = 0 + Seconds(document.getElementById("clock1").value);
        Down();
        }
        //  End -->
        </script>
        
        &nbsp;Session Time Remaining: <input id="clock1" style="font-size: 8pt; color: #008000; text-align: center; border-width: 0px;" name="clock" size="5" value="120:00" readonly >min. Refresh page to extend time.
        
        <script language="javascript">
        timeIt();
        </script>
        And to prevent the browser back button, I also add this to the header section.

        Code:
        <script type="text/javascript">
        function noBack(){window.history.forward();}
        noBack();
        window.onload=noBack;
        window.onpageshow=function(evt){if(evt.persisted)noBack();}
        window.onunload=function(){void(0);}
        </script>
        I hope this is useful for you.

        Stephen
        Last edited by iRadiate; 05-24-2013, 08:22 PM. Reason: Added an additional pointer
        Alpha Anywhere v12.4.6.5.2 Build 8867-5691 IIS v10.0 on Windows Server 2019 Std in Hyper-V

        Comment


          #5
          Re: How can I redirect user to login page when session times out?

          Stephen,
          This looks tremendously helpful.
          Thanks, and I will report back when I have had a chance to test it.
          Jay
          Jay Talbott
          Lexington, KY

          Comment


            #6
            Re: How can I redirect user to login page when session times out?

            Jay,

            Here is a quick video showing the timer in action.
            In the top left corner, you will see the timer count down to zero.
            A alert window pops up explaining to the user that their session has timed-out.
            The page is then redirected to the login page. I click the browser back button to show that you can't simply click back to log back in.
            After logging back in, the session counter starts over at 120 minutes again.

            http://screencast.com/t/vIsDg5PEMA

            Stephen
            Alpha Anywhere v12.4.6.5.2 Build 8867-5691 IIS v10.0 on Windows Server 2019 Std in Hyper-V

            Comment


              #7
              Re: How can I redirect user to login page when session times out?

              Just Wow! Thanks Stephen (and Carol King) for providing that code. I was searching through the forum for something else and stumbled upon this post. I've been wanting to explore if something like this was possible, but with so much other stuff that had priority over it, it got bumped to the bottom of my list. This took me all of about 10 minutes to tweak and get working!! I think my client will be impressed - I know I am!

              Thank you, thank you, thank you!
              Last edited by Melissa Smith; 05-31-2013, 01:39 PM. Reason: Oops, wrong name!
              Melissa Smith
              Triskelion Consulting, LLC

              Comment


                #8
                Stephen,
                I had reason to use this code today, and it works great.
                Is there a way to reset the timer programatically when someone clicks on a Tabbed_UI button, for example? I can reset the minute variable using the Chrome debugger by submitting this in the Console:
                min = 30

                However, I am not sure of the scope when working with the tabbed UI. Perhaps I have to put the time in a span and then update it.
                Thoughts?
                Thanks again.
                Jay
                Jay Talbott
                Lexington, KY

                Comment


                  #9
                  Hi Jay, well to be honest I moved away from the TabbedUI many years ago now and replaced it with a more versatile expanding menu inside a panel card.
                  When I did that I also stopped using the session timeout method above.

                  Alpha Anywhere v12.4.6.5.2 Build 8867-5691 IIS v10.0 on Windows Server 2019 Std in Hyper-V

                  Comment


                    #10
                    Thanks. I am working on an old app with the Tabbed_UI, and would like to get away from that also.
                    Jay Talbott
                    Lexington, KY

                    Comment

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