ambdownload.php

   1 <?php\r
   2 /*\r
   3 Plugin Name: ambdownload\r
   4 Plugin URI: http://blog.alex.org.uk/\r
   5 Description: Redirect a given page to a download URL\r
   6 Version: 2.2\r
   7 Author: Alex Bligh\r
   8 Author URI: http://blog.alex.org.uk\r
   9 */\r
  10 \r
  11 class ambdownload\r
  12 {\r
  13         function getDownloadLink($user, $link, $error, $file="default")\r
  14         {\r
  15                 if (empty($user) && !empty($error))\r
  16                 {\r
  17                         return ($error);\r
  18                 }\r
  19                 $time = time();\r
  20                 $secret = rtrim(file_get_contents("/etc/apache2/download.secret"));\r
  21                 $id = $user;\r
  22                 $hash = hash("sha256",$time.":".$id.":".$file.":".$secret);\r
  23                 return $link.sprintf("?id=%s&file=%s&time=%s&hash=%s",urlencode($id),urlencode($file),$time,$hash);\r
  24         }\r
  25 \r
  26         function downloadRedirect()\r
  27         {       \r
  28                 global $post;\r
  29                 if ((is_single() || is_singular() || is_page()))\r
  30                 {\r
  31                         /* Tag of file to download, e.g. 'default' */\r
  32                         $download_file = get_post_meta($post->ID, 'download_file', true);  \r
  33                         /* EG 'http://server.example.com/download' */\r
  34                         $download_url = get_post_meta($post->ID, 'download_url', true);  \r
  35                         /* EG URL where redirected if no username exists */\r
  36                         $download_error = get_post_meta($post->ID, 'download_error', true);  \r
  37                         if ($download_file && $download_url) {  \r
  38                                 global $current_user;\r
  39                                 get_currentuserinfo();\r
  40                                 wp_redirect(ambdownload::getDownloadLink($current_user->user_email, $download_url, $download_error, $download_file));\r
  41                                 exit;\r
  42                         }\r
  43                 }\r
  44         }\r
  45 }\r
  46 \r
  47 \r
  48 add_action( 'template_redirect', array('ambdownload', 'downloadRedirect'), 1, 2);\r
  49 \r
  50 \r
  51 \r