[SGVLUG] How'd they do that?

[Emerson, Tom (*IC)]

> -----Original Message----- Of Michael Proctor-Smith
> 
> On 8/20/07, matti <mathew_2000 at yahoo.com> wrote:
> >
> > How'd they do that?
> >
> > I wanted to refer someone [to]
> > a cartoon from baby blues...
> >
> > and got this instead! 
> http://est.rbma.com/content_server/noreferer.gif
> >
> > so.. How'd they do that?
> 
> Not hard the image is 
> http://est.rbma.com/content/Baby_Blues?date=20070806
> a cgi or script of sometype if you load the image with a 
> blank incorrect referror you get the no referrer image. The 
> cooller part would be if it was called 
> baby_blues_20070806.jpg{.gif or .png}

And even that is pretty simple -- it's an .htaccess rule:

http://altlab.com/htaccess_tutorial.html

And an even slicker .php version

http://www.alistapart.com/articles/hotlinking/

(both sites have links to several more articles on the subject...)