helpers/download_helper.php

   1 <?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');\r
   2 /**\r
   3  * CodeIgniter\r
   4  *\r
   5  * An open source application development framework for PHP 4.3.2 or newer\r
   6  *\r
   7  * @package             CodeIgniter\r
   8  * @author              ExpressionEngine Dev Team\r
   9  * @copyright   Copyright (c) 2008, EllisLab, Inc.\r
  10  * @license             http://codeigniter.com/user_guide/license.html\r
  11  * @link                http://codeigniter.com\r
  12  * @since               Version 1.0\r
  13  * @filesource\r
  14  */\r
  15 \r
  16 // ------------------------------------------------------------------------\r
  17 \r
  18 /**\r
  19  * CodeIgniter Download Helpers\r
  20  *\r
  21  * @package             CodeIgniter\r
  22  * @subpackage  Helpers\r
  23  * @category    Helpers\r
  24  * @author              ExpressionEngine Dev Team\r
  25  * @link                http://codeigniter.com/user_guide/helpers/download_helper.html\r
  26  */\r
  27 \r
  28 // ------------------------------------------------------------------------\r
  29 \r
  30 /**\r
  31  * Force Download\r
  32  *\r
  33  * Generates headers that force a download to happen\r
  34  *\r
  35  * @access      public\r
  36  * @param       string  filename\r
  37  * @param       mixed   the data to be downloaded\r
  38  * @return      void\r
  39  */     \r
  40 if ( ! function_exists('force_download'))\r
  41 {\r
  42         function force_download($filename = '', $data = '')\r
  43         {\r
  44                 if ($filename == '' OR $data == '')\r
  45                 {\r
  46                         return FALSE;\r
  47                 }\r
  48 \r
  49                 // Try to determine if the filename includes a file extension.\r
  50                 // We need it in order to set the MIME type\r
  51                 if (FALSE === strpos($filename, '.'))\r
  52                 {\r
  53                         return FALSE;\r
  54                 }\r
  55         \r
  56                 // Grab the file extension\r
  57                 $x = explode('.', $filename);\r
  58                 $extension = end($x);\r
  59 \r
  60                 // Load the mime types\r
  61                 @include(APPPATH.'config/mimes'.EXT);\r
  62         \r
  63                 // Set a default mime if we can't find it\r
  64                 if ( ! isset($mimes[$extension]))\r
  65                 {\r
  66                         $mime = 'application/octet-stream';\r
  67                 }\r
  68                 else\r
  69                 {\r
  70                         $mime = (is_array($mimes[$extension])) ? $mimes[$extension][0] : $mimes[$extension];\r
  71                 }\r
  72         \r
  73                 // Generate the server headers\r
  74                 if (strstr($_SERVER['HTTP_USER_AGENT'], "MSIE"))\r
  75                 {\r
  76                         header('Content-Type: "'.$mime.'"');\r
  77                         header('Content-Disposition: attachment; filename="'.$filename.'"');\r
  78                         header('Expires: 0');\r
  79                         header('Cache-Control: must-revalidate, post-check=0, pre-check=0');\r
  80                         header("Content-Transfer-Encoding: binary");\r
  81                         header('Pragma: public');\r
  82                         header("Content-Length: ".strlen($data));\r
  83                 }\r
  84                 else\r
  85                 {\r
  86                         header('Content-Type: "'.$mime.'"');\r
  87                         header('Content-Disposition: attachment; filename="'.$filename.'"');\r
  88                         header("Content-Transfer-Encoding: binary");\r
  89                         header('Expires: 0');\r
  90                         header('Pragma: no-cache');\r
  91                         header("Content-Length: ".strlen($data));\r
  92                 }\r
  93         \r
  94                 exit($data);\r
  95         }\r
  96 }\r
  97 \r
  98 \r
  99 /* End of file download_helper.php */\r
 100 /* Location: ./system/helpers/download_helper.php */