Limit download per ip

download-limit.php

<?
$path = addslashes($_GET["file"]);
$ip = addslashes($_SERVER['REMOTE_ADDR']);

if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
  $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
}

$dl = false;

// get cache dir
$ipslug = strtolower(preg_replace('/[^A-Za-z0-9]+/', '_', $ip));
$cacheDir = './dlperip/' . $ipslug;
if(!is_dir($cacheDir)) {
  if (!mkdir($cacheDir, 0755, true)) {
    die('Failed to create temp cache folders...');
  }
}
$cacheFile = $cacheDir . '/' . hash('md5', $path) . '.txt';

if (!file_exists($cacheFile)) {
  $fp1 = fopen($cacheFile, "w");
  fputs($fp1 , '0');
  fclose($fp1); 
}

$content = file($cacheFile);        // reading all lines into array
$counter = intval($content[0]) + 1; // getting first line
file_put_contents($cacheFile, $counter); // writing data

# limit one, change this if you want to change the limit
if ($counter < 2) {
  $dl = true;
}

// reset
if ($_GET["reset"] == "some-secret") {
  unlink($cacheFile);
}

if ($dl) {
  $fullPath = "./files/".$path; 
  if ($fd = fopen ($fullPath, "r")) {
    $fname = basename($fullPath);
    header('Content-type: application/octet-stream');
    header('Content-Disposition: filename="'.$fname.'"');
    header('Content-length: '.filesize($fullPath));
    header('Cache-control: private'); 
    while(!feof($fd)) {
      $buffer = fread($fd, 2048);
      echo $buffer;
    }
    fclose ($fd);
    exit;
  }
} else {
  header('HTTP/1.0 503 Service Unavailable');
  die('Abort, you reached your download limit for this file.');
}