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112 lines (92 loc) · 3.75 KB
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* This script fetches legacy course files in dataroot directory, it is enabled
* only if course->legacyfiles == 2. DO not link to this file in new code.
*
* Syntax: file.php/courseid/dir/dir/dir/filename.ext
* file.php/courseid/dir/dir/dir/filename.ext?forcedownload=1 (download instead of inline)
* file.php/courseid/dir (returns index.html from dir)
* Workaround: file.php?file=/courseid/dir/dir/dir/filename.ext
*
* @package core
* @subpackage file
* @copyright 1999 onwards Martin Dougiamas (http://dougiamas.com)
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
// disable moodle specific debug messages and any errors in output
define('NO_DEBUG_DISPLAY', true);
require_once('config.php');
require_once('lib/filelib.php');
$relativepath = get_file_argument();
$forcedownload = optional_param('forcedownload', 0, PARAM_BOOL);
// relative path must start with '/', because of backup/restore!!!
if (!$relativepath) {
print_error('invalidargorconf');
} else if ($relativepath{0} != '/') {
print_error('pathdoesnotstartslash');
}
// extract relative path components
$args = explode('/', ltrim($relativepath, '/'));
if (count($args) == 0) { // always at least courseid, may search for index.html in course root
print_error('invalidarguments');
}
$courseid = (int)array_shift($args);
$relativepath = implode('/', $args);
// security: limit access to existing course subdirectories
$course = $DB->get_record('course', array('id'=>$courseid), '*', MUST_EXIST);
if ($course->legacyfiles != 2) {
// course files disabled
send_file_not_found();
}
if ($course->id != SITEID) {
require_login($course, true, null, false);
} else if ($CFG->forcelogin) {
if (!empty($CFG->sitepolicy)
and ($CFG->sitepolicy == $CFG->wwwroot.'/file.php/'.$relativepath
or $CFG->sitepolicy == $CFG->wwwroot.'/file.php?file=/'.$relativepath)) {
//do not require login for policy file
} else {
require_login(0, true, null, false);
}
}
$context = context_course::instance($course->id);
$fs = get_file_storage();
$fullpath = "/$context->id/course/legacy/0/$relativepath";
if (!$file = $fs->get_file_by_hash(sha1($fullpath))) {
if (strrpos($fullpath, '/') !== strlen($fullpath) -1 ) {
$fullpath .= '/';
}
// Try to fallback to the directory named as the supposed file.
if (!$file = $fs->get_file_by_hash(sha1($fullpath.'.'))) {
send_file_not_found();
}
}
// do not serve dirs
if ($file->get_filename() == '.') {
if (!$file = $fs->get_file_by_hash(sha1($fullpath.'index.html'))) {
if (!$file = $fs->get_file_by_hash(sha1($fullpath.'index.htm'))) {
if (!$file = $fs->get_file_by_hash(sha1($fullpath.'Default.htm'))) {
send_file_not_found();
}
}
}
}
// ========================================
// finally send the file
// ========================================
\core\session\manager::write_close(); // Unlock session during file serving.
send_stored_file($file, null, $CFG->filteruploadedfiles, $forcedownload);