Thanks for all the prompt response.
My current implementation relies either on explicit user logoff (which
trigger the servlet to invalidated a session object) or session expiry (say
30mins) and subsequently invoke the unbound fct of the listener interface to
close the db connection (one session object -to- one db session).
But i expect, one more step forward, to invalidate the session as long as
the browser closed or page navigated away (user navigate to other website)
from my application.
I found JavaScript doesn't have event like window -> onclose which allow me
to insert code to trigger the servlet. i did understand it's a bit
demanding, but i really want to disconnect from db at the moment the user
exits otherwise, an accumulated number of inactive connections may found on
the DBMS in a timeout (30mins) window.
Pls suggest
Joe
----- Original Message -----
From: Jim Richards <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, November 17, 1999 1:59 PM
Subject: Re: [How to know a brower closed]
> >I also have same question. Also i would like to know what are the ways to
> >find out in my Servlet "whether the user is still available or not
whether he
> >has closed the browser/ cancelled the request by pressing the "ESC" key /
shut
> >down his browser / or he has got disconnected".
>
> There is no concept of a browser closing. Since all http sessions are
stateless,
> then each time a page is requested then when the browser finishes loading
the
> page or not, it is the end of the http session.
>
> Unless you check with the server how much of the content has been sent
there
> is no real way to catch this.
>
> If what you really want is to know if the user is no longer browsing your
site
> then the timeout of a session can be captured with with the interface
> HttpSessionBindingListener, which get called when the session times
> out (so, say after 30 minutes of inactivity)
>
> An alternative (but more hassle, and a pain for the user) is to either use
the
> <body onunload=""> or to write an applet that sends a UDP packet when the
> close method is called (although you then have a delay when the page load
> and the UPD packet may not get through) ...
>
>
> --
> Subvert the dominant paradigm
> http://www.cyber4.org/members/grumpy/index.html
>
>
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