Proyectos de Subversion Moodle

<?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/>.

namespace core\session;

/**

 * File based session handler.

 *

 * @package    core

 * @copyright  2013 Petr Skoda {@link http://skodak.org}

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class file extends handler {

    /** @var string session dir */

    protected $sessiondir;

    /**

     * Create new instance of handler.

     */

    public function __construct() {

        global $CFG;

        if (!empty($CFG->session_file_save_path)) {

            $this->sessiondir = $CFG->session_file_save_path;

        } else {

            $this->sessiondir = "$CFG->dataroot/sessions";

        }

    }

    #[\Override]

    public function init() {

        if (preg_match('/^[0-9]+;/', $this->sessiondir)) {

            throw new exception('sessionhandlerproblem', 'error', '', null, 'Multilevel session directories are not supported');

        }

        // Make sure session directory exists and is writable.

        make_writable_directory($this->sessiondir, false);

        if (!is_writable($this->sessiondir)) {

            throw new exception('sessionhandlerproblem', 'error', '', null, 'Session directory is not writable');

        }

        // Need to disable debugging since disk_free_space()

        // will fail on very large partitions (see MDL-19222).

        // Moodle supports disable_functions = disk_free_space (MDL-43039).

        $freespace = function_exists('disk_free_space') ? disk_free_space($this->sessiondir) : false;

        if (!($freespace > 2048) && ($freespace !== false)) {

            throw new exception('sessiondiskfull', 'error');

        }

        // NOTE: we cannot set any lock acquiring timeout here - bad luck.

        ini_set('session.save_handler', 'files');

        ini_set('session.save_path', $this->sessiondir);

    }

    #[\Override]

    public function session_exists($sid) {

        $sid = clean_param($sid, PARAM_FILE);

        if (!$sid) {

            return false;

        }

        $sessionfile = "$this->sessiondir/sess_$sid";

        return file_exists($sessionfile);

    }

    #[\Override]

    public function destroy_all(): bool {

        if (is_dir($this->sessiondir)) {

            foreach (glob("$this->sessiondir/sess_*") as $filename) {

                @unlink($filename);

            }

        }

        return parent::destroy_all();

    }

    #[\Override]

    public function destroy(string $id): bool {

        $sid = clean_param($id, PARAM_FILE);

        if (!$sid) {

            return false;

        }

        $sessionfile = "$this->sessiondir/sess_$sid";

        if (file_exists($sessionfile)) {

            @unlink($sessionfile);

        }

        return parent::destroy($id);

    }

}