bs_disp_as_mime_type.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * @package     BLOBStreaming
   5  */
   6
   7 /**
   8  * Core library.
   9  */
  10 require_once './libraries/common.inc.php';
  11
  12 // Check URL parameters
  13 PMA_checkParameters(array('reference', 'c_type'));
  14
  15 // Increase time limit, because fetching blob might take some time
  16 @set_time_limit(0);
  17
  18 $reference = $_REQUEST['reference'];
  19 /*
  20  * FIXME: Maybe it would be better to check MIME type against whitelist as
  21  * this code sems to support only few MIME types (check
  22  * function PMA_BS_CreateReferenceLink in libraries/blobstreaming.lib.php).
  23  */
  24 $c_type = preg_replace('/[^A-Za-z0-9/_-]/', '_', $_REQUEST['c_type']);
  25
  26 // Get the blob streaming URL
  27 $filename = PMA_BS_getURL($reference);
  28 if (empty($filename)) {
  29     die(__('No blob streaming server configured!'));
  30 }
  31
  32 $hdrs = get_headers($filename, 1);
  33
  34 if ($hdrs === false) {
  35     die(__('Failed to fetch headers'));
  36 }
  37
  38 $fHnd = fopen($filename, "rb");
  39
  40 if ($fHnd === false) {
  41     die(__('Failed to open remote URL'));
  42 }
  43
  44 $f_size = $hdrs['Content-Length'];
  45
  46 header("Expires: 0");
  47 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
  48 header("Cache-Control: no-store, no-cache, must-revalidate");
  49 header("Cache-Control: post-check=0, pre-check=0", false);
  50 header("Pragma: no-cache");
  51 header("Content-type: $c_type");
  52 header('Content-length: ' . $f_size);
  53 header("Content-disposition: attachment; filename=" . basename($filename));
  54
  55 $pos = 0;
  56 $content = "";
  57
  58 while (!feof($fHnd)) {
  59     $content .= fread($fHnd, $f_size);
  60     $pos = strlen($content);
  61
  62     if ($pos >= $f_size) {
  63         break;
  64     }
  65 }
  66
  67 echo $content;
  68 flush();
  69
  70 fclose($fHnd);