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