mirror of
https://github.com/moodle/moodle.git
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d79d5ac276
List of changes: * New OOP API using PHP namespace \core\session\. * All handlers now update the sessions table consistently. * Experimental DB session support in Oracle. * Full support for session file handler (filesystem locking required). * New option for alternative session directory. * Official memcached session handler support. * Workaround for memcached version with non-functional gc. * Improved security - forced session id regeneration. * Improved compatibility with recent PHP releases. * Fixed borked CSS during install in debug mode. * Switched to file based sessions in new installs. * DB session setting disappears if DB does not support sessions. * DB session setting disappears if session handler specified in config.php. * Fast purging of sessions used in request only. * No legacy distinction - file, database and memcached support the same functionality. * Session handler name included in performance info. * Fixed user_loggedin and user_loggedout event triggering. * Other minor bugfixing and improvements. * Fixed database session segfault if MUC disposed before $DB. Limitations: * Session access time is now updated right after session start. * Support for $CFG->sessionlockloggedinonly was removed. * First request does not update userid in sessions table. * The timeouts may break badly if server hosting forces PHP.ini session settings. * The session GC is a lot slower, we do not rely on external session timeouts. * There cannot be any hooks triggered at the session write time. * File and memcached handlers do not support session lock acquire timeouts. * Some low level PHP session functions can not be used directly in Moodle code.
89 lines
2.5 KiB
PHP
89 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 script serves draft files of current user
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*
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* @package core
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* @subpackage file
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* @copyright 2008 Petr Skoda (http://skodak.org)
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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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// disable moodle specific debug messages and any errors in output
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define('NO_DEBUG_DISPLAY', true);
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require_once('config.php');
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require_once('lib/filelib.php');
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require_login();
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if (isguestuser()) {
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print_error('noguest');
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}
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$relativepath = get_file_argument();
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$preview = optional_param('preview', null, PARAM_ALPHANUM);
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// relative path must start with '/'
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if (!$relativepath) {
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print_error('invalidargorconf');
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} else if ($relativepath{0} != '/') {
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print_error('pathdoesnotstartslash');
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}
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// extract relative path components
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$args = explode('/', ltrim($relativepath, '/'));
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if (count($args) == 0) { // always at least user id
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print_error('invalidarguments');
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}
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$contextid = (int)array_shift($args);
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$component = array_shift($args);
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$filearea = array_shift($args);
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$draftid = (int)array_shift($args);
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if ($component !== 'user' or $filearea !== 'draft') {
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send_file_not_found();
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}
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$context = context::instance_by_id($contextid);
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if ($context->contextlevel != CONTEXT_USER) {
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send_file_not_found();
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}
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$userid = $context->instanceid;
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if ($USER->id != $userid) {
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print_error('invaliduserid');
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}
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$fs = get_file_storage();
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$relativepath = implode('/', $args);
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$fullpath = "/$context->id/user/draft/$draftid/$relativepath";
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if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->get_filename() == '.') {
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send_file_not_found();
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}
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// ========================================
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// finally send the file
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// ========================================
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\core\session\manager::write_close(); // Unlock session during file serving.
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send_stored_file($file, 0, false, true, array('preview' => $preview)); // force download - security first!
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