Not sure about using SocketWriteException. A less elegant approach might be
to put a javascript function in the page that is called when the window is
closed. That JS function could call a servlet that you can write. (This is
a bit OT though because it's really to do with HTML rather than tomcat).
For example:
<HTML>
<HEAD>
<script language="JavaScript">
function tellTomcat()
{
dummy.src = "/myWebApp/NotifyClose?windowId=xyz123"; // xyz123 generated
by your servlet or JSP, make it unique for each served instance of this page
}
</script>
</HEAD>
<body onunload="tellTomcat();">
<p>Page content here</p>
<img name="dummy" src="invisible.gif" width="0" height="0"/>
</body>
</HTML>
As an alternative to using windowId above, your NotifyCLose servlet could
just read the session from the request object.
> -----Original Message-----
> From: Stephan Coboos [mailto:[EMAIL PROTECTED]
> Sent: Wednesday 20 October 2004 16:33
> To: [EMAIL PROTECTED]
> Subject: How to get a notfication if the user closes its browser?
>
>
> Hi,
>
> I need to send a very very big set of data within a servlet
> to the users
> browser. But if the users canceles the transmission or closes its
> browser I need to cancel writting the data to save resources.
> But if the
> user canceles the response during transmission I don't get a
> SocketWriteException? I had tested this behaviour by
> executing a endless
> while loop:
>
> while(true) {
>
> out.write("Foo");
> }
>
> But if the the browser will be closed during receiving the output,
> tomcat doesn't break the while loop. Why? I thougt at this
> point tomcat
> schould throw an exception? Why not?
>
> How can I break writing the output if the user closes it
> browser? Thank you!
>
> Regards
> Stephan
>
>
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