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Posted by Chris Hope on 08/09/06 01:15
giminik@gmail.com wrote:
> 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
>> 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.
I tried both Firefox and Konqueror and they both redirected me to the
second page, so there doesn't appear to be anything different between
using wget and using a graphical browser, at least to me.
You can't detect the use of a command line tool if they set the user
agent correctly. For example:
wget --user-agent="Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"
followed by the url will tell the website you're using IE on Windows XP.
--
Chris Hope | www.electrictoolbox.com | www.linuxcdmall.com
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