How to know from where you come?

Michael Fesser wrote:
> Iván Sánchez Ortega wrote:
>
>> Do some research on HTTP referrers.
>
> And on how unreliable they are.

They are "reliable enough" for *many* purposes.

--
Toby A Inkster BSc (Hons) ARCS
[Geek of HTML/SQL/Perl/PHP/Python/Apache/Linux]
[OS: Linux 2.6.12-12mdksmp, up 7 days, 14:46.]

Long-Awaited Zeldman Article
http://tobyinkster.co.uk/blog/2007/0...ldman-in-time/

..oO(joboils@hotmail.com)

>A user leaves a site when they click on a link to do so(!).

Yep, and the script on site 1 won't notice that. No browser sends a
"good bye, I'm leaving now".

Or do you think of a kind of redirection script on site 1, which logs
the request?

<a href="redirect?url=site2.example.com">site 2</a>

That's just _one_ way to "leave" a site. There are a dozen others.

Micha

rf wrote:

> You can *never* tell when somebody leaves a site.

You can never *reliably* tell when somebody leaves a site.

You can do some assumptions, though. e.g., "A user has left my site if I
haven't received any hits from him in the last 5 minutes" or "A user has
left my site if his session has expired".

> The web is stateless.

Better said, HTTP is a stateless protocol.

And, seriously, anyone not understanding this concept should go back to his
books.

--
----------------------------------
Iván Sánchez Ortega -ivansanchez-algarroba-escomposlinux-punto-org-

What? You search? You would multiply yourself by ten, by a hundred? You seek
followers? Seek zeros!
-- Friedrich Nietzsche [1844 - 1900]