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  • Bug fixes for general core bugs in 3.4.x ended 12 November 2018 (12 months).
  • Bug fixes for security issues in 3.4.x ended 13 May 2019 (18 months).
  • minimum PHP 7.0.0 Note: minimum PHP version has increased since Moodle 3.3. PHP 7.1.x and 7.2.x are supported too. PHP 7.x could have some engine limitations.
  • / -> file.php (source)

    Differences Between: [Versions 28 and 34] [Versions 29 and 34] [Versions 30 and 34] [Versions 31 and 34] [Versions 32 and 34]

       1  <?php
       2  
       3  // This file is part of Moodle - http://moodle.org/
       4  //
       5  // Moodle is free software: you can redistribute it and/or modify
       6  // it under the terms of the GNU General Public License as published by
       7  // the Free Software Foundation, either version 3 of the License, or
       8  // (at your option) any later version.
       9  //
      10  // Moodle is distributed in the hope that it will be useful,
      11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
      12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13  // GNU General Public License for more details.
      14  //
      15  // You should have received a copy of the GNU General Public License
      16  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
      17  
      18  /**
      19   * This script fetches legacy course files in dataroot directory, it is enabled
      20   * only if course->legacyfiles == 2. DO not link to this file in new code.
      21   *
      22   * Syntax:      file.php/courseid/dir/dir/dir/filename.ext
      23   *              file.php/courseid/dir/dir/dir/filename.ext?forcedownload=1 (download instead of inline)
      24   *              file.php/courseid/dir (returns index.html from dir)
      25   * Workaround:  file.php?file=/courseid/dir/dir/dir/filename.ext
      26   *
      27   * @package    core
      28   * @subpackage file
      29   * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)
      30   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
      31   */
      32  
      33  // disable moodle specific debug messages and any errors in output
      34  define('NO_DEBUG_DISPLAY', true);
      35  
      36  require_once('config.php');
      37  require_once ('lib/filelib.php');
      38  
      39  $relativepath  = get_file_argument();
      40  $forcedownload = optional_param('forcedownload', 0, PARAM_BOOL);
      41  
      42  // relative path must start with '/', because of backup/restore!!!
      43  if (!$relativepath) {
      44      print_error('invalidargorconf');
      45  } else if ($relativepath{0} != '/') {
      46      print_error('pathdoesnotstartslash');
      47  }
      48  
      49  // extract relative path components
      50  $args = explode('/', ltrim($relativepath, '/'));
      51  
      52  if (count($args) == 0) { // always at least courseid, may search for index.html in course root
      53      print_error('invalidarguments');
      54  }
      55  
      56  $courseid = (int)array_shift($args);
      57  $relativepath = implode('/', $args);
      58  
      59  // security: limit access to existing course subdirectories
      60  $course = $DB->get_record('course', array('id'=>$courseid), '*', MUST_EXIST);
      61  
      62  if ($course->legacyfiles != 2) {
      63      // course files disabled
      64      send_file_not_found();
      65  }
      66  
      67  if ($course->id != SITEID) {
      68      require_login($course, true, null, false);
      69  
      70  } else if ($CFG->forcelogin) {
      71      if (empty($CFG->sitepolicyhandler) and !empty($CFG->sitepolicy)
      72          and ($CFG->sitepolicy == $CFG->wwwroot.'/file.php/'.$relativepath
      73               or $CFG->sitepolicy == $CFG->wwwroot.'/file.php?file=/'.$relativepath)) {
      74          //do not require login for policy file
      75      } else {
      76          require_login(0, true, null, false);
      77      }
      78  }
      79  
      80  $context = context_course::instance($course->id);
      81  
      82  $fs = get_file_storage();
      83  
      84  $fullpath = "/$context->id/course/legacy/0/$relativepath";
      85  
      86  if (!$file = $fs->get_file_by_hash(sha1($fullpath))) {
      87      if (strrpos($fullpath, '/') !== strlen($fullpath) -1 ) {
      88          $fullpath .= '/';
      89      }
      90      // Try to fallback to the directory named as the supposed file.
      91      if (!$file = $fs->get_file_by_hash(sha1($fullpath.'.'))) {
      92          send_file_not_found();
      93      }
      94  }
      95  // do not serve dirs
      96  if ($file->get_filename() == '.') {
      97      if (!$file = $fs->get_file_by_hash(sha1($fullpath.'index.html'))) {
      98          if (!$file = $fs->get_file_by_hash(sha1($fullpath.'index.htm'))) {
      99              if (!$file = $fs->get_file_by_hash(sha1($fullpath.'Default.htm'))) {
     100                  send_file_not_found();
     101              }
     102          }
     103      }
     104  }
     105  
     106  // ========================================
     107  // finally send the file
     108  // ========================================
     109  \core\session\manager::write_close(); // Unlock session during file serving.
     110  send_stored_file($file, null, $CFG->filteruploadedfiles, $forcedownload);
     111  
     112  
    

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