mirror of
https://github.com/moodle/moodle.git
synced 2025-01-18 05:58:34 +01:00
117 lines
3.8 KiB
PHP
117 lines
3.8 KiB
PHP
<?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/>.
|
|
|
|
/**
|
|
* Minimalistic library, usable even when no other moodle libs are loaded.
|
|
*
|
|
* The only library that gets loaded if you define ABORT_AFTER_CONFIG
|
|
* before including main config.php. You can resume normal script operation
|
|
* if you define ABORT_AFTER_CONFIG_CANCEL and require the setup.php
|
|
*
|
|
* @package moodlecore
|
|
* @copyright 2009 petr Skoda (skodak)
|
|
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
|
|
*/
|
|
|
|
/**
|
|
* Minimalistic parameter validation function.
|
|
* Can not use optional param because moodlelib.php is not loaded yet
|
|
* @param string $name
|
|
* @param mixed $default
|
|
* @param string $type
|
|
* @return mixed
|
|
*/
|
|
function min_optional_param($name, $default, $type) {
|
|
$value = $default;
|
|
if (isset($_GET[$name])) {
|
|
$value = $_GET[$name];
|
|
|
|
} else if (isset($_GET['amp;'.$name])) {
|
|
// very, very, very ugly hack, unforunately $OUTPUT->pix_url() is not used properly in javascript code :-(
|
|
$value = $_GET['amp;'.$name];
|
|
}
|
|
|
|
return min_clean_param($value, $type);
|
|
}
|
|
|
|
/**
|
|
* Minimalistic parameter cleaning function.
|
|
* Can not use optional param because moodlelib.php is not loaded yet
|
|
* @param string $name
|
|
* @param mixed $default
|
|
* @param string $type
|
|
* @return mixed
|
|
*/
|
|
function min_clean_param($value, $type) {
|
|
switch($type) {
|
|
case 'RAW': break;
|
|
case 'INT': $value = (int)$value;
|
|
break;
|
|
case 'SAFEDIR': $value = preg_replace('/[^a-zA-Z0-9_-]/', '', $value);
|
|
break;
|
|
case 'SAFEPATH': $value = preg_replace('/[^a-zA-Z0-9\/\._-]/', '', $value);
|
|
$value = preg_replace('/\.+/', '.', $value);
|
|
$value = preg_replace('#/+#', '/', $value);
|
|
break;
|
|
default: die("Coding error: incorrent parameter type specified ($type).");
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* This method tries to enable output compression if possible.
|
|
* This function must be called before any output or headers.
|
|
*
|
|
* (IE6 is not supported at all.)
|
|
*
|
|
* @return boolean, true if compression enabled
|
|
*/
|
|
function min_enable_zlib_compression() {
|
|
|
|
if (headers_sent()) {
|
|
return false;
|
|
}
|
|
|
|
// zlib.output_compression is preferred over ob_gzhandler()
|
|
if (!empty($_SERVER['HTTP_USER_AGENT'])) {
|
|
$agent = $_SERVER['HTTP_USER_AGENT'];
|
|
// try to detect IE6 and prevent gzip because it is extremely buggy browser
|
|
$parts = explode(';', $agent);
|
|
if (isset($parts[1])) {
|
|
$parts = explode(' ', trim($parts[1]));
|
|
if (count($parts) > 1) {
|
|
if ($parts[0] === 'MSIE' and (float)$parts[1] < 7) {
|
|
@ini_set('zlib.output_compression', '0');
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@ini_set('output_handler', '');
|
|
|
|
/*
|
|
* docs clearly say 'on' means enable and number menas size of bufffer,
|
|
* but unfortunately some PHP version break when we set 'on' here.
|
|
* 1 probably sets chunk size to 4096. our CSS and JS scripts are much bigger,
|
|
* so let's try some bigger sizes.
|
|
*/
|
|
@ini_set('zlib.output_compression', 65536);
|
|
|
|
return true;
|
|
} |