file.php

   1 <?PHP // $Id$
   2       // This function fetches files from the data directory
   3       // Syntax:   file.php/courseid/dir/.../dir/filename.ext
   4
   5     require_once("config.php");
   6     require_once("files/mimetypes.php");
   7
   8     $lifetime = 86400;
   9
  10     if (isset($file)) {     // workaround for situations where / syntax doesn't work
  11         $pathinfo = $file;
  12     } else {
  13         $pathinfo = get_slash_arguments("file.php");
  14     }
  15
  16     if (!$pathinfo) {
  17         error("No file parameters!");
  18     }
  19
  20     if (! $args = parse_slash_arguments($pathinfo)) {
  21         error("No valid arguments supplied");
  22     }
  23
  24     $numargs = count($args);
  25     $courseid = (integer)$args[0];
  26
  27     $course = get_record("course", "id", $courseid);
  28
  29     if ($course->category) {
  30         require_login($courseid);
  31     }
  32
  33     // it's OK to get here if no course was specified
  34
  35     $pathname = "$CFG->dataroot$pathinfo";
  36     $filename = $args[$numargs-1];
  37
  38     $mimetype = mimeinfo("type", $filename);
  39
  40     if (file_exists($pathname)) {
  41         $lastmodified = filemtime($pathname);
  42
  43         header("Last-Modified: " . gmdate("D, d M Y H:i:s", $lastmodified) . " GMT");
  44         header("Expires: " . gmdate("D, d M Y H:i:s", time() + $lifetime) . " GMT");
  45         header("Cache-control: max_age = $lifetime"); // a day
  46         header("Pragma: ");
  47         header("Content-disposition: inline; filename=$filename");
  48         header("Content-length: ".filesize($pathname));
  49         header("Content-type: $mimetype");
  50         readfile("$pathname");
  51     } else {
  52         error("Sorry, but the file you are looking for was not found ($pathname)", "course/view.php?id=$courseid");
  53     }
  54
  55     exit;
  56 ?>