Question about browser sessions

[nn12]

In a java web app, if I am browsing a site and then I open another IE 8 window* and go to the same site, is there a way to detect that the request has come from another window from the same machine.

Basically my requirement is to alert the user that they cannot open another window with the same site.

*In IE 8 all windows share the same session. Hence request.getsession() would always return the same ID across all the windows.

[Petr]

it depends of your application. How you managed to sessions inside.

[kjkrum]

You could include some random and otherwise meaningless ID in the URL and pass it around from page to page. If you see two different IDs associated with the same session, you'll know there are (or were) two different windows opened. Then you could, say, display an error in response to subsequent page loads using the old ID.

[nn12]

@knkrum - can you pls tell me how to append a number to an URL or refer me to some site. I am basically using struts 1.3 application

[kjkrum]

Sorry, it's been a long time since I did any Web development. But I would probably add parameters to my URLs using PHP, not Java.

If by Web app you mean an Applet, you can try using Applet.getDocumentBase() to get the URL. But I'm not sure if that will include the parameters.

[Norm]

When you build the HTML page add a parameter to all the tags: <A href="http://www.java-forums.org/new-java/ ... +ID=newIdXXX ..."

Not sure of the syntax of the URL. I used a + to delimit the items