mirror of
https://github.com/catalyst/moodle-auth_outage.git
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65 lines
2.5 KiB
PHP
65 lines
2.5 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* This file should run before config.php requires '/lib/setup.php'.
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*
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* Main purpose of this file:
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* 1) Allow to 'file.php' to know where dataroot is located and serve files during a maintenance.
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* 2) Allow to 'pretend' maintenance mode for non-allowed IPs by calling 'climaintenance.php'.
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* 3) Set a flag that this file was loaded so we can warn users if this config is not working.
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*
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* @package auth_outage
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* @author Daniel Thee Roperto <daniel.roperto@catalyst-au.net>
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* @copyright 2016 Catalyst IT
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*
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* @var stdClass $CFG
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*/
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// This file does nothing if running from CLI.
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if (defined('CLI_SCRIPT') && CLI_SCRIPT) {
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return;
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}
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// 1) Are we fetching a file? Non-allowed IPs can still see them.
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if (defined('AUTH_OUTAGE_FILE')) {
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// We are not using any external libraries or references in this file (cli maintenance is active).
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// If you change the path below maybe you need to change maintenance_static_page::get_resources_folder() as well.
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$resourcedir = $CFG->dataroot.'/auth_outage/climaintenance';
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// Protect against path traversal attacks.
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$file = $resourcedir.'/'.$_GET['file'];
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if (realpath($file) !== $file) {
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// @codingStandardsIgnoreStart
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error_log('Invalid file: '.$_GET['file']);
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// @codingStandardsIgnoreEnd
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http_response_code(404);
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die('Not found.');
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}
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readfile($file);
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exit(0);
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}
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// 2) Check for allowed IPs during outages.
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if (file_exists($CFG->dataroot.'/climaintenance.php')) {
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$CFG->dirroot = dirname(dirname(dirname(__FILE__))); // It is not defined yet but the script below needs it.
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require($CFG->dataroot.'/climaintenance.php'); // This call may terminate the script here or not.
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}
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// 3) Set flag this file was loaded.
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$CFG->auth_outage_check = 2;
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