bs_disp_as_mime_type.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * @author      Raj Kissu Rajandran
   5  * @version     1.0
   6  * @package     BLOBStreaming
   7  */
   8
   9 /**
  10  * Core library.
  11  */
  12 require_once './libraries/common.inc.php';
  13
  14 // load PMA configuration
  15 $PMA_Config = $_SESSION['PMA_Config'];
  16
  17 // retrieve BS server variables from PMA configuration
  18 $bs_server = $PMA_Config->get('BLOBSTREAMING_SERVER');
  19 if (empty($bs_server)) die('No blob streaming server configured!');
  20
  21 // Check URL parameters
  22 PMA_checkParameters(array('reference', 'c_type'));
  23
  24 // Increase time limit, because fetching blob might take some time
  25 set_time_limit(0);
  26
  27 $reference = $_REQUEST['reference'];
  28 /*
  29  * FIXME: Maybe it would be better to check MIME type against whitelist as
  30  * this code sems to support only few MIME types (check
  31  * function PMA_BS_CreateReferenceLink in libraries/blobstreaming.lib.php).
  32  */
  33 $c_type = preg_replace('/[^A-Za-z0-9/_-]/', '_', $_REQUEST['c_type']);
  34
  35 $filename = 'http://' . $bs_server . '/' . $reference;
  36
  37 $hdrs = get_headers($filename, 1);
  38
  39 if ($hdrs === FALSE) die('Failed to fetch headers');
  40
  41 $fHnd = fopen($filename, "rb");
  42
  43 if ($fHnd === FALSE) die('Failed to open remote URL');
  44
  45 $f_size = $hdrs['Content-Length'];
  46
  47 header("Expires: 0");
  48 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
  49 header("Cache-Control: no-store, no-cache, must-revalidate");
  50 header("Cache-Control: post-check=0, pre-check=0", false);
  51 header("Pragma: no-cache");
  52 header("Content-type: $c_type");
  53 header('Content-length: ' . $f_size);
  54 header("Content-disposition: attachment; filename=" . basename($filename));
  55
  56 $pos = 0;
  57 $content = "";
  58
  59 while (!feof($fHnd)) {
  60     $content .= fread($fHnd, $f_size);
  61     $pos = strlen($content);
  62
  63     if ($pos >= $f_size)
  64         break;
  65 }
  66
  67 echo $content;
  68 flush();
  69
  70 fclose($fHnd);