image.php

   1 <?php
   2         set_include_path(dirname(__FILE__) ."/include" . PATH_SEPARATOR .
   3                 get_include_path());
   4
   5         require_once "config.php";
   6
   7         // backwards compatible wrapper for old-style image caching
   8         /* if (isset($_GET['url'])) {
   9                 $url = base64_decode($_GET['url']);
  10
  11                 $filename = CACHE_DIR . '/images/' . sha1($url) . '.png';
  12
  13                 if (file_exists($filename)) {
  14                         header("Content-type: image/png");
  15                         echo file_get_contents($filename);
  16                 } else {
  17                         header("Location: $url");
  18                 }
  19
  20                 return;
  21         } */
  22
  23         @$hash = basename($_GET['hash']);
  24
  25         if ($hash) {
  26
  27                 $filename = CACHE_DIR . '/images/' . $hash . '.png';
  28
  29                 if (file_exists($filename)) {
  30                         /* See if we can use X-Sendfile */
  31                         $xsendfile = false;
  32                         if (function_exists('apache_get_modules') &&
  33                             array_search('mod_xsendfile', apache_get_modules()))
  34                                 $xsendfile = true;
  35
  36                         if ($xsendfile) {
  37                                 header("X-Sendfile: $filename");
  38                                 header("Content-type: application/octet-stream");
  39                                 header('Content-Disposition: attachment; filename="' . basename($filename) . '"');
  40                         } else {
  41                                 header("Content-type: image/png");
  42                                 $stamp = gmdate("D, d M Y H:i:s", filemtime($filename)). " GMT";
  43                                 header("Last-Modified: $stamp", true);
  44                                 readfile($filename);
  45                         }
  46                 } else {
  47                         header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
  48                         echo "File not found.";
  49                 }
  50         }
  51
  52 ?>