Intranet server

sunsuron

I run a *server in my main campus (intranet LAN). I would like to make my index.php to list other online server. Where do I start?

What I mean by *server is my pc running win32 (winXP-pro) and I've installed Apache, php, mysql and php-Nuke and it is running well. My computer was assigned by an IP (for example http://10.100.97.240) and people around campus (Intranet only) can access http://10.100.97.240/ if my apache is started.

Other student can also turn their pc into a server just like mine by installing apache. So now, the number of this server is growing and I would like to make a script that list all available online server and the offline server (a server is offline if thier apache is stopped) as well. Where do I start?

I have basic mysql, php scripting.

theeper

If you don't know the IP's of the other servers, you can use a port scanner (like Nmap) to scan your network and look for machines with an open HTTP port (usually port 80). Then create a simple shell script to parse the output from the port scanner and write the results to a file or a DB.

Then, have a script that creates an HTML page with links to the other servers.

If you know the machines IP's you can write a simple PHP script to try and open the index page on each machine. If it can be opened, then you list the status of that machine as Online.

sunsuron

I know the IP of the server. This is what I did so far. I get the header of the online server. But it will took long time if the server is offline. Any suggestion?

<?php

$url = "http://10.100.106.58/";
$arr = parse_url($url);
$fp = fsockopen ($arr['host'], 80);
if (!$fp) {
    echo "FAILED.<br>\n";
} else {
    $request = "HEAD / HTTP/1.0\r\nHost: ".$arr['host']."\r\n\r\n";
    fputs ($fp, $request);
    while (!feof($fp)) {
        echo fgets ($fp,128);
    }
    fclose ($fp);
}

?>

Weedpacket

You can speed up the fsockopen() call by adding a timeout. I'm not sure what the default is, but if you specify something smaller, it will give up sooner 🙂.