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From: Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP>
Newsgroups: comp.lang.ada
Subject: Re: Gnoga Latest Updates
Date: Mon, 13 Oct 2014 18:28:28 +0000 (UTC)
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Date: 2014-10-13T18:28:28+00:00
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On 2014-10-13, jeremiah.breeden@gmail.com <jeremiah.breeden@gmail.com> wrote:
>
> Question: Is there currently or will there be a way to tell when the
> user closes the browser window or navigates to a different URL?
>
> I am using Tutorial 2 as base example for this, but when a user does
> the following:
>
> Starts Tutorial 2
> Opens localhost:8080
> closes the browser

Closes the browser completely causing the browser executable to actually
exit or just closes the current window ?

At this point run netstat and see what state the connection is in.

> Reopens localhost:8080
>
> they get the error message:  Only one connection permitted.
>

[snip]
>
> I tried the On_Abort event, but it doesn't seem to call when the
> browser closes or you navigate to a different URL.  Is there something
> I can do.  I want this to be as seamless for my users as possible.
>

This behaviour is potentially browser specific; I could see how a
browser may potentially cache connections in case you decide to
go back to the page you just left.

After you browse to a different URL, check netstat and see if the
original connection is still in an ESTABLISHED state or if the
browser has actually closed the connection.

Simon.

-- 
Simon Clubley, clubley@remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world