Hello everybody :)
A friend recently showed me an odd thing while playing with the command
wget under linux, I don't know why... But the result has surprised me :
$ wget
http://www.prizee.com/parole.php
--02:35:29--
http://www.prizee.com/parole.php
=`parole.php'
Resolution de
www.prizee.com... 213.186.63.5
Connexion vers www.prizee.com|213.186.63.5|:80...connecte.
requete HTTP transmise, en attente de la reponse...302 Found
Emplacement: /index.php?joueur=1 [suivant]
--02:35:30--
http://www.prizee.com/index.php?joueur=1
=`index.php?joueur=1.1'
Connexion vers www.prizee.com|213.186.63.5|:80...connecte.
requete HTTP transmise, en attente de la reponse...200 OK
Longueur: non specifie [text/html]
[ <=>
] 12,521
--.--K/s
02:35:30 (103.57 KB/s) - ? index.php?joueur=1.1 a sauvegarde [12521]
Then, he obtains an http error code (302) which redirect him on the
index page of the site.
With a browser like firefox, ie, safari we get the good page without
any redirection.
After that, I've made some tests. I tried to change the user agent
string with wget to identify it as mozilla, but I have the same result
(redirection). I tried links (command line browser) and curl but same
problem.
Here is the result of curl command :
$ curl -v
http://www.prizee.com/parole.php
* About to connect() to
www.prizee.com port 80
* Trying 213.186.63.5... connected
* Connected to
www.prizee.com (213.186.63.5) port 80
Quote:
GET /parole.php HTTP/1.1
User-Agent: curl/7.15.1 (i686-pc-linux-gnu) libcurl/7.15.1 GnuTLS/1.2.10 zlib/1.2.3 libidn/0.5.15
Host: www.prizee.com
Accept: */*
>
|
< HTTP/1.1 302 Found
< Date: Wed, 09 Aug 2006 00:02:57 GMT
< Server: Apache/1.3.33 (Unix) PHP/4.3.10
< X-Powered-By: PHP/4.3.10
< X-Accelerated-By: PHPA/1.3.3r2
< Expires: Mon, 26 Jul 1997 05:00:00 GMT
< Last-Modified: Wed, 09 Aug 2006 00:02:59 GMT
< Cache-Control: no-cache, must-revalidate
< Pragma: no-cache
< Set-Cookie: COOKIEis_accepted=1; path=/; domain=.prizee.com
< Location: /index.php?joueur=1
< Connection: close
< Transfer-Encoding: chunked
< Content-Type: text/html
* Closing connection #0
So, my question is : How we can detect the use of a command line tool
on a web site ? Like the site above. Thank you for your answers.
Sorry for my bad english, i'm french ;)
detection of a robot in php 
