[EMAIL PROTECTED] wrote:
> Hi
>
> I wanted to get the IP address and the OS of the system when some one
> checks in the page...How will I get the IP address and OS of the
> person who visits the page(with PERL CGI)
Short answer:
$ENV{REMOTE_ADDR} contains the client IP address
$ENV{HTTP_USER_AGENT} might contain OS information (depends on the
client)
Long answer:
The only things you can get are:
1. The client IP address, which you can get by calling getpeername() on
STDIN (or from REMOTE_ADDR environment variable). If the client is behind a
proxy, you'd need to depend on the proxy adding something to the request
headers.
2. Information from the HTTP request headers.
If your webserver follows the CGI specification (e.g. Apache mod_cgi),
several environment variables are set from the request headers and client
connection. See http://hoohoo.ncsa.uiuc.edu/cgi/env.html
There's no information about the Client's OS, unless it's embedded in
HTTP_USER_AGENT somehow.
ALL of this can be faked except for the REMOTE_ADDR.
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