bs_disp_as_mime_type.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * @version     1.0
   5  * @package     BLOBStreaming
   6  */
   7
   8 /**
   9  * Core library.
  10  */
  11 require_once './libraries/common.inc.php';
  12
  13 // load PMA configuration
  14 $PMA_Config = $GLOBALS['PMA_Config'];
  15
  16 // retrieve BS server variables from PMA configuration
  17 $bs_server = $PMA_Config->get('BLOBSTREAMING_SERVER');
  18 if (empty($bs_server)) die('No blob streaming server configured!');
  19
  20 // Check URL parameters
  21 PMA_checkParameters(array('reference', 'c_type'));
  22
  23 // Increase time limit, because fetching blob might take some time
  24 set_time_limit(0);
  25
  26 $reference = $_REQUEST['reference'];
  27 /*
  28  * FIXME: Maybe it would be better to check MIME type against whitelist as
  29  * this code sems to support only few MIME types (check
  30  * function PMA_BS_CreateReferenceLink in libraries/blobstreaming.lib.php).
  31  */
  32 $c_type = preg_replace('/[^A-Za-z0-9/_-]/', '_', $_REQUEST['c_type']);
  33
  34 $filename = 'http://' . $bs_server . '/' . $reference;
  35
  36 $hdrs = get_headers($filename, 1);
  37
  38 if ($hdrs === FALSE) die('Failed to fetch headers');
  39
  40 $fHnd = fopen($filename, "rb");
  41
  42 if ($fHnd === FALSE) die('Failed to open remote URL');
  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 echo $content;
  67 flush();
  68
  69 fclose($fHnd);