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See Release Notes

  • Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
  • Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
  • PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.
/lib/ -> javascript.php (source)
<?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 file is serving optimised JS
 *
 * @package    core_lib
 * @copyright  2010 Petr Skoda (skodak)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

// disable moodle specific debug messages and any errors in output,
// comment out when debugging or better look into error log!
define('NO_DEBUG_DISPLAY', true);

// we need just the values from config.php and minlib.php
define('ABORT_AFTER_CONFIG', true);
require('../config.php'); // this stops immediately at the beginning of lib/setup.php
require_once("$CFG->dirroot/lib/jslib.php");

if ($slashargument = min_get_slash_argument()) {
    $slashargument = ltrim($slashargument, '/');
    if (substr_count($slashargument, '/') < 1) {
        header('HTTP/1.0 404 not found');
        die('Slash argument must contain both a revision and a file path');
    }
    // image must be last because it may contain "/"
    list($rev, $file) = explode('/', $slashargument, 2);
    $rev  = min_clean_param($rev, 'INT');
    $file = '/'.min_clean_param($file, 'SAFEPATH');

} else {
    $rev  = min_optional_param('rev', -1, 'INT');
    $file = min_optional_param('jsfile', '', 'RAW'); // 'file' would collide with URL rewriting!
}

> if (!min_is_revision_valid_and_current($rev)) { // some security first - pick only files with .js extension in dirroot > // If the rev is invalid, normalise it to -1 to disable all caching. $jsfiles = array(); > $rev = -1; $files = explode(',', $file); > } foreach ($files as $fsfile) { >
$jsfile = realpath($CFG->dirroot.$fsfile); if ($jsfile === false) { // does not exist continue; } if ($CFG->dirroot === '/') { // Some shared hosting sites serve files directly from '/', // this is NOT supported, but at least allow JS when showing // errors and warnings. } else if (strpos($jsfile, $CFG->dirroot . DIRECTORY_SEPARATOR) !== 0) { // hackers - not in dirroot continue; } if (substr($jsfile, -3) !== '.js') { // hackers - not a JS file continue; } $jsfiles[] = $jsfile; } if (!$jsfiles) { // bad luck - no valid files header('HTTP/1.0 404 not found'); die('No valid javascript files found'); } $etag = sha1($rev.implode(',', $jsfiles));
< // Use the caching only for meaningful revision numbers which prevents future cache poisoning. < if ($rev > 0 and $rev < (time() + 60*60)) {
> if ($rev > 0) {
$candidate = $CFG->localcachedir.'/js/'.$etag; if (file_exists($candidate)) { if (!empty($_SERVER['HTTP_IF_NONE_MATCH']) || !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])) { // we do not actually need to verify the etag value because our files // never change in cache because we increment the rev parameter js_send_unmodified(filemtime($candidate), $etag); } js_send_cached($candidate, $etag); } else { // The JS needs minfifying, so we're gonna have to load our full Moodle // environment to process it.. define('ABORT_AFTER_CONFIG_CANCEL', true); define('NO_MOODLE_COOKIES', true); // Session not used here. define('NO_UPGRADE_CHECK', true); // Ignore upgrade check. require("$CFG->dirroot/lib/setup.php"); js_write_cache_file_content($candidate, core_minify::js_files($jsfiles)); // verify nothing failed in cache file creation clearstatcache(); if (file_exists($candidate)) { js_send_cached($candidate, $etag); } } } $content = ''; foreach ($jsfiles as $jsfile) { $content .= file_get_contents($jsfile)."\n"; } js_send_uncached($content);