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445 lines
17 KiB
445 lines
17 KiB
2 years ago
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<?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 is responsible for serving of yui Javascript and CSS
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*
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* @package core
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* @copyright 2009 Petr Skoda (skodak) {@link 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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// comment out when debugging or better look into error log!
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define('NO_DEBUG_DISPLAY', true);
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// we need just the values from config.php and minlib.php
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define('ABORT_AFTER_CONFIG', true);
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require('../config.php'); // this stops immediately at the beginning of lib/setup.php
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// get special url parameters
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list($parts, $slasharguments) = combo_params();
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if (!$parts) {
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combo_not_found();
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}
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$etag = sha1($parts);
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$parts = trim($parts, '&');
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// find out what we are serving - only one type per request
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$content = '';
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if (substr($parts, -3) === '.js') {
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$mimetype = 'application/javascript';
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} else if (substr($parts, -4) === '.css') {
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$mimetype = 'text/css';
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} else {
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combo_not_found();
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}
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// if they are requesting a revision that's not -1, and they have supplied an
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// If-Modified-Since header, we can send back a 304 Not Modified since the
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// content never changes (the rev number is increased any time the content changes)
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if (strpos($parts, '/-1/') === false and (!empty($_SERVER['HTTP_IF_NONE_MATCH']) || !empty($_SERVER['HTTP_IF_MODIFIED_SINCE']))) {
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$lifetime = 60*60*24*360; // 1 year, we do not change YUI versions often, there are a few custom yui modules
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header('HTTP/1.1 304 Not Modified');
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header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
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header('Cache-Control: public, max-age='.$lifetime);
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header('Content-Type: '.$mimetype);
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header('Etag: "'.$etag.'"');
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die;
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}
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$parts = explode('&', $parts);
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$cache = true;
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$lastmodified = 0;
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while (count($parts)) {
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$part = array_shift($parts);
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if (empty($part)) {
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continue;
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}
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$filecontent = '';
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$part = min_clean_param($part, 'SAFEPATH');
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$bits = explode('/', $part);
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if (count($bits) < 2) {
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$content .= "\n// Wrong combo resource $part!\n";
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continue;
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}
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$version = array_shift($bits);
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if ($version === 'rollup') {
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$yuipatchedversion = explode('_', array_shift($bits));
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$revision = $yuipatchedversion[0];
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$rollupname = array_shift($bits);
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if (strpos($rollupname, 'yui-moodlesimple') !== false) {
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if (substr($rollupname, -3) === '.js') {
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// Determine which version of this rollup should be used.
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$filesuffix = '.js';
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preg_match('/(-(debug|min))?\.js/', $rollupname, $matches);
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if (isset($matches[1])) {
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$filesuffix = $matches[0];
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}
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$type = 'js';
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} else if (substr($rollupname, -4) === '.css') {
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$type = 'css';
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} else {
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continue;
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}
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// Allow support for revisions on YUI between official releases.
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// We can just discard the subrevision since it is only used to invalidate the browser cache.
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$yuipatchedversion = explode('_', $revision);
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$yuiversion = $yuipatchedversion[0];
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$yuimodules = array(
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'yui',
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'oop',
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'event-custom-base',
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'dom-core',
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'dom-base',
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'color-base',
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'dom-style',
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'selector-native',
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'selector',
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'node-core',
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'node-base',
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'event-base',
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'event-base-ie',
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'pluginhost-base',
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'pluginhost-config',
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'event-delegate',
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'node-event-delegate',
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'node-pluginhost',
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'dom-screen',
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'node-screen',
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'node-style',
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'querystring-stringify-simple',
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'io-base',
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'json-parse',
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'transition',
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'selector-css2',
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'selector-css3',
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'dom-style-ie',
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// Some extras we use everywhere.
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'escape',
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'attribute-core',
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'event-custom-complex',
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'base-core',
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'attribute-base',
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'attribute-extras',
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'attribute-observable',
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'base-observable',
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'base-base',
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'base-pluginhost',
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'base-build',
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'event-synthetic',
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'attribute-complex',
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'event-mouseenter',
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'event-key',
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'event-outside',
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'event-focus',
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'classnamemanager',
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'widget-base',
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'widget-htmlparser',
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'widget-skin',
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'widget-uievents',
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'widget-stdmod',
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'widget-position',
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'widget-position-align',
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'widget-stack',
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'widget-position-constrain',
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'overlay',
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'widget-autohide',
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'button-core',
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'button-plugin',
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'widget-buttons',
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'widget-modality',
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'panel',
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'yui-throttle',
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'dd-ddm-base',
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'dd-drag',
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'dd-plugin',
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// Cache is used by moodle-core-tooltip which we include everywhere.
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'cache-base',
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);
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// We need to add these new parts to the beginning of the $parts list, not the end.
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if ($type === 'js') {
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$newparts = array();
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foreach ($yuimodules as $module) {
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$newparts[] = $yuiversion . '/' . $module . '/' . $module . $filesuffix;
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}
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$newparts[] = 'yuiuseall/yuiuseall';
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$parts = array_merge($newparts, $parts);
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} else {
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$newparts = array();
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foreach ($yuimodules as $module) {
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$candidate = $yuiversion . '/' . $module . '/assets/skins/sam/' . $module . '.css';
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if (!file_exists("$CFG->libdir/yuilib/$candidate")) {
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continue;
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}
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$newparts[] = $candidate;
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}
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if ($newparts) {
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$parts = array_merge($newparts, $parts);
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}
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}
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}
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continue;
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}
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if ($version === 'm') {
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$version = 'moodle';
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}
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if ($version === 'moodle') {
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if (count($bits) <= 3) {
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// This is an invalid module load attempt.
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$content .= "\n// Incorrect moodle module inclusion. Not enough component information in {$part}.\n";
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continue;
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}
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$revision = (int)array_shift($bits);
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if ($revision === -1) {
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// Revision -1 says please don't cache the JS
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$cache = false;
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}
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$frankenstyle = array_shift($bits);
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$filename = array_pop($bits);
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$modulename = $bits[0];
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$dir = core_component::get_component_directory($frankenstyle);
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// For shifted YUI modules, we need the YUI module name in frankenstyle format.
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$frankenstylemodulename = join('-', array($version, $frankenstyle, $modulename));
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$frankenstylefilename = preg_replace('/' . $modulename . '/', $frankenstylemodulename, $filename);
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// Submodules are stored in a directory with the full submodule name.
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// We need to remove the -debug.js, -min.js, and .js from the file name to calculate that directory name.
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$frankenstyledirectoryname = str_replace(array('-min.js', '-debug.js', '.js', '.css'), '', $frankenstylefilename);
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// By default, try and use the /yui/build directory.
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$contentfile = $dir . '/yui/build/' . $frankenstyledirectoryname;
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if ($mimetype == 'text/css') {
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// CSS assets are in a slightly different place to the JS.
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$contentfile = $contentfile . '/assets/skins/sam/' . $frankenstylefilename;
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// Add the path to the bits to handle fallback for non-shifted assets.
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$bits[] = 'assets';
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$bits[] = 'skins';
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$bits[] = 'sam';
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} else {
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$contentfile = $contentfile . '/' . $frankenstylefilename;
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}
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// If the shifted versions don't exist, fall back to the non-shifted file.
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if (!file_exists($contentfile) or !is_file($contentfile)) {
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// We have to revert to the non-minified and non-debug versions.
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$filename = preg_replace('/-(min|debug)\./', '.', $filename);
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$contentfile = $dir . '/yui/' . join('/', $bits) . '/' . $filename;
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}
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} else if ($version === '2in3') {
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$contentfile = "$CFG->libdir/yuilib/$part";
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} else if ($version == 'gallery') {
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if (count($bits) <= 2) {
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// This is an invalid module load attempt.
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$content .= "\n// Incorrect moodle module inclusion. Not enough component information in {$part}.\n";
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continue;
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}
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$revision = (int)array_shift($bits);
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if ($revision === -1) {
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// Revision -1 says please don't cache the JS
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$cache = false;
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}
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$contentfile = "$CFG->libdir/yuilib/gallery/" . join('/', $bits);
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} else if ($version == 'yuiuseall') {
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// Create global Y that is available in global scope,
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// this is the trick behind original SimpleYUI.
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$filecontent = "var Y = YUI().use('*');";
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} else {
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// Allow support for revisions on YUI between official releases.
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// We can just discard the subrevision since it is only used to invalidate the browser cache.
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$yuipatchedversion = explode('_', $version);
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$yuiversion = $yuipatchedversion[0];
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if ($yuiversion != $CFG->yui3version) {
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$content .= "\n// Wrong yui version $part!\n";
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continue;
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}
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$newpart = explode('/', $part);
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$newpart[0] = $yuiversion;
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$part = implode('/', $newpart);
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$contentfile = "$CFG->libdir/yuilib/$part";
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}
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if (!file_exists($contentfile) or !is_file($contentfile)) {
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$location = '$CFG->dirroot'.preg_replace('/^'.preg_quote($CFG->dirroot, '/').'/', '', $contentfile);
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$content .= "\n// Combo resource $part ($location) not found!\n";
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continue;
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}
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if (empty($filecontent)) {
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$filecontent = file_get_contents($contentfile);
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}
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$fmodified = filemtime($contentfile);
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if ($fmodified > $lastmodified) {
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$lastmodified = $fmodified;
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}
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$relroot = preg_replace('|^http.?://[^/]+|', '', $CFG->wwwroot);
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$sep = ($slasharguments ? '/' : '?file=');
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if ($mimetype === 'text/css') {
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if ($version == 'moodle') {
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// Search for all images in the file and replace with an appropriate link to the yui_image.php script
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$imagebits = array(
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$sep . $version,
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$frankenstyle,
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$modulename,
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array_shift($bits),
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'$1.$2'
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);
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$filecontent = preg_replace('/([a-z0-9_-]+)\.(png|gif)/', $relroot . '/theme/yui_image.php' . implode('/', $imagebits), $filecontent);
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} else if ($version == '2in3') {
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// First we need to remove relative paths to images. These are used by YUI modules to make use of global assets.
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// I've added this as a separate regex so it can be easily removed once
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// YUI standardise there CSS methods
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$filecontent = preg_replace('#(\.\./\.\./\.\./\.\./assets/skins/sam/)?([a-z0-9_-]+)\.(png|gif)#', '$2.$3', $filecontent);
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// search for all images in yui2 CSS and serve them through the yui_image.php script
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$filecontent = preg_replace('/([a-z0-9_-]+)\.(png|gif)/', $relroot.'/theme/yui_image.php'.$sep.$CFG->yui2version.'/$1.$2', $filecontent);
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} else if ($version == 'gallery') {
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// Replace any references to the CDN with a relative link.
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$filecontent = preg_replace('#(' . preg_quote('http://yui.yahooapis.com/') . '(gallery-[^/]*/))#', '../../../../', $filecontent);
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// Replace all relative image links with the a link to yui_image.php.
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$filecontent = preg_replace('#(' . preg_quote('../../../../') . ')(gallery-[^/]*/assets/skins/sam/[a-z0-9_-]+)\.(png|gif)#',
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$relroot . '/theme/yui_image.php' . $sep . '/gallery/' . $revision . '/$2.$3', $filecontent);
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} else {
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// First we need to remove relative paths to images. These are used by YUI modules to make use of global assets.
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// I've added this as a separate regex so it can be easily removed once
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// YUI standardise there CSS methods
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||
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$filecontent = preg_replace('#(\.\./\.\./\.\./\.\./assets/skins/sam/)?([a-z0-9_-]+)\.(png|gif)#', '$2.$3', $filecontent);
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// search for all images in yui2 CSS and serve them through the yui_image.php script
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|
|
$filecontent = preg_replace('/([a-z0-9_-]+)\.(png|gif)/', $relroot.'/theme/yui_image.php'.$sep.$version.'/$1.$2', $filecontent);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$content .= $filecontent;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($lastmodified == 0) {
|
||
|
|
$lastmodified = time();
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($cache) {
|
||
|
|
combo_send_cached($content, $mimetype, $etag, $lastmodified);
|
||
|
|
} else {
|
||
|
|
combo_send_uncached($content, $mimetype);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Send the JavaScript cached
|
||
|
|
* @param string $content
|
||
|
|
* @param string $mimetype
|
||
|
|
* @param string $etag
|
||
|
|
* @param int $lastmodified
|
||
|
|
*/
|
||
|
|
function combo_send_cached($content, $mimetype, $etag, $lastmodified) {
|
||
|
|
$lifetime = 60*60*24*360; // 1 year, we do not change YUI versions often, there are a few custom yui modules
|
||
|
|
|
||
|
|
header('Content-Disposition: inline; filename="combo"');
|
||
|
|
header('Last-Modified: '. gmdate('D, d M Y H:i:s', $lastmodified) .' GMT');
|
||
|
|
header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
|
||
|
|
header('Pragma: ');
|
||
|
|
header('Cache-Control: public, max-age='.$lifetime.', immutable');
|
||
|
|
header('Accept-Ranges: none');
|
||
|
|
header('Content-Type: '.$mimetype);
|
||
|
|
header('Etag: "'.$etag.'"');
|
||
|
|
if (!min_enable_zlib_compression()) {
|
||
|
|
header('Content-Length: '.strlen($content));
|
||
|
|
}
|
||
|
|
|
||
|
|
echo $content;
|
||
|
|
die;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Send the JavaScript uncached
|
||
|
|
* @param string $content
|
||
|
|
* @param string $mimetype
|
||
|
|
*/
|
||
|
|
function combo_send_uncached($content, $mimetype) {
|
||
|
|
header('Content-Disposition: inline; filename="combo"');
|
||
|
|
header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
|
||
|
|
header('Expires: '. gmdate('D, d M Y H:i:s', time() + 2) .' GMT');
|
||
|
|
header('Pragma: ');
|
||
|
|
header('Accept-Ranges: none');
|
||
|
|
header('Content-Type: '.$mimetype);
|
||
|
|
if (!min_enable_zlib_compression()) {
|
||
|
|
header('Content-Length: '.strlen($content));
|
||
|
|
}
|
||
|
|
|
||
|
|
echo $content;
|
||
|
|
die;
|
||
|
|
}
|
||
|
|
|
||
|
|
function combo_not_found($message = '') {
|
||
|
|
header('HTTP/1.0 404 not found');
|
||
|
|
if ($message) {
|
||
|
|
echo $message;
|
||
|
|
} else {
|
||
|
|
echo 'Combo resource not found, sorry.';
|
||
|
|
}
|
||
|
|
die;
|
||
|
|
}
|
||
|
|
|
||
|
|
function combo_params() {
|
||
|
|
if (isset($_SERVER['QUERY_STRING']) and strpos($_SERVER['QUERY_STRING'], 'file=/') === 0) {
|
||
|
|
// url rewriting
|
||
|
|
$slashargument = substr($_SERVER['QUERY_STRING'], 6);
|
||
|
|
return array($slashargument, true);
|
||
|
|
|
||
|
|
} else if (isset($_SERVER['REQUEST_URI']) and strpos($_SERVER['REQUEST_URI'], '?') !== false) {
|
||
|
|
$parts = explode('?', $_SERVER['REQUEST_URI'], 2);
|
||
|
|
return array($parts[1], false);
|
||
|
|
|
||
|
|
} else if (isset($_SERVER['QUERY_STRING']) and strpos($_SERVER['QUERY_STRING'], '?') !== false) {
|
||
|
|
// note: buggy or misconfigured IIS does return the query string in REQUEST_URI
|
||
|
|
return array($_SERVER['QUERY_STRING'], false);
|
||
|
|
|
||
|
|
} else if ($slashargument = min_get_slash_argument(false)) {
|
||
|
|
$slashargument = ltrim($slashargument, '/');
|
||
|
|
return array($slashargument, true);
|
||
|
|
|
||
|
|
} else {
|
||
|
|
// unsupported server, sorry!
|
||
|
|
combo_not_found('Unsupported server - query string can not be determined, try disabling YUI combo loading in admin settings.');
|
||
|
|
}
|
||
|
|
}
|