SRL Archive - Web Development

I have recently made a script that can check if a visitor is using tor to visit your website. The way it works is pretty simple, it downloads a list of TOR exit servers and compares it to the user's IP.

Of course, it would completely slow down your website if you downloaded the file every time someone visited your site. So I split it into two scripts. One is meant to be implemented/included into each page you want the script to be on, and the other is meant to be in a cron.

So, here they are:
Index.php
[PHP]<?php
// Compares Remote IP Address to a tor router list

// Configuration
$CacheDir = "torcache"; // Directory that the ip files are contained

$foctet = explode(".", $_SERVER['REMOTE_ADDR'], 2); // Get first octet of IP address
$f=@file($CacheDir . "/" . $foctet[0]); // Open cache file, suppressing error messages

$len = count($f); // Count the amount of IPs in the cache file
$isrouter = false; // Default, as this value only changes if it is a router
if ($f != false) {
$ip = ip2long($_SERVER['REMOTE_ADDR']); // Our IP address as an integer
for ($i=0;$i<$len;$i++) // While there are still IP addresses to read
{
if ($ip == ip2long(rtrim($f[$i]))) // If the remote IP and an IP from the list match
{
$isrouter = true; // Our visitor is a tor node
break; // Continue
}
}
}

if ($isrouter) // If visitor is a tor node
{ // Put any code you want here
echo("<font color=green>You are using TOR.</font><br>\n");
}
else // If visitor is not a tor node
{ // Put any code you want here
echo("<font color=red>You are not using TOR.</font><br>\n");
}
echo("Your IP address is " . $_SERVER['REMOTE_ADDR']); // Optional; removal is recommended
// That should just about do it.
?>
[/PHP]

GetCache.php
[PHP]<?php
// Retrieves the tor exit nodes from specified servers.

// Configuration
$SourceFiles[0] = "https://torstatus.blutmagie.de/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[1] = "https://torstatus.all.de/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[2] = "https://torstatus.kgprog.com/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[3] = "https://kradense.whsites.net/tns/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[4] = "http://torstatus.blutmagie.de/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[5] = "http://torstatus.all.de/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[6] = "http://torstatus.kgprog.com/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[7] = "http://tns.hermetix.org/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[8] = "http://torstatus.blutmagie.de/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[9] = "http://tns.hermetix.org/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[10] = "http://kradense.whsites.net/tns/ip_list_exit.php/Tor_ip_list_EXIT.csv";
$SourceFiles[11] = "http://tor.recox.org/ip_list_exit.php/Tor_ip_list_EXIT.csv";

// These are set to the main Tor Network Status servers, but you can change them to whatever you want,
// as long as the format is one IP per line, and they are ordered

$CacheDir = "torcache"; // Directory that the ip files are written to
// Make sure you set full write access to this directory

$sites = count($SourceFiles); // Count how many sources there are to choose from, so you don't have to
$f = false; // File handler false by default
$s = false; // Success false by default

for($i=0; $i<$sites; $i++) // For loop to make sure we get one ip list
{
$f=file($SourceFiles[$i]); // Attempt to open the file
if ($f != false) // If file was successfully opened
{
$s = true; // Set success to true
break; // Get out of the for loop
}
}

if ($s == false) die("No cache file could be retrieved."); // Die if we didn't get a file

$len = count($f); // Number of IPs retrieved
$last = 0; // Var used for changing files in the tor cache
$f2 = false; // Resource indicator for writing the file

for($j=0;$j<$len;$j++) // While we still have IPs to go through
{
$foctet = explode(".",$f[$j],2); // Get just the first octet from the IP
if ($last == 0) // This happens only the first time
{
$f2 = fopen($CacheDir . "/" . $foctet[0], "w"); // Open a new file
} else
if ($foctet[0] != $last) // If our first octet has changed
{
fclose($f2); // Close our other file
$f2 = fopen($CacheDir . "/" . $foctet[0], "w"); // Open a new one
}
fwrite($f2, $f[$j]); // Write our IP to the file
$last = $foctet[0]; // Set the last octet to this octet, so we can compare next time
}

fclose($f2); // Close the last file
//That should do the trick.

?>
[/PHP]

I tried putting this on my hosting forums, and absolutely nobody replied to it, whether it was good or bad. So please, give me your honest feedback about this script, I don't care if it's the most negative thing you've ever said.

I am bumping this because it is useful code, and he hasn't gotten any appreciation for it :D

I will be sure to implant this into my webpages, been having a problem with spam and inappropriate uploads. Thanks.

Oh yeah, also posting because of

I tried putting this on my hosting forums, and absolutely nobody replied to it, whether it was good or bad. So please, give me your honest feedback about this script, I don't care if it's the most negative thing you've ever said.