/theme/yui_combo.php
PHP | 288 lines | 184 code | 41 blank | 63 comment | 54 complexity | 9841013607eb4c40cd69788dee8c27c4 MD5 | raw file
- <?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 images
- *
- * @package moodlecore
- * @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;
- $lastmodified = 0;
- foreach ($parts as $part) {
- if (empty($part)) {
- continue;
- }
- $filecontent = '';
- $part = min_clean_param($part, 'SAFEPATH');
- $bits = explode('/', $part);
- if (count($bits) < 2) {
- $content .= "\n// Wrong combo resource $part!\n";
- continue;
- }
- //debug($bits);
- $version = array_shift($bits);
- 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;
- }
- if (!defined('ABORT_AFTER_CONFIG_CANCEL')) {
- define('ABORT_AFTER_CONFIG_CANCEL', true);
- define('NO_UPGRADE_CHECK', true);
- define('NO_MOODLE_COOKIES', true);
- require($CFG->libdir.'/setup.php');
- }
- $revision = (int)array_shift($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];
- $dir = get_component_directory($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, $filename);
- // By default, try and use the /yui/build directory.
- if ($mimetype == 'text/css') {
- // CSS assets are in a slightly different place to the JS.
- $contentfile = $dir . '/yui/build/' . $frankenstylemodulename . '/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 = $dir . '/yui/build/' . $frankenstylemodulename . '/' . $frankenstylefilename;
- }
- // If the shifted versions don't exist, fall back to the non-shifted file.
- if (!file_exists($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') {
- $contentfile = "$CFG->libdir/yui/$part";
- } else {
- if ($version != $CFG->yui3version) {
- $content .= "\n// Wrong yui version $part!\n";
- continue;
- }
- $contentfile = "$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') {
- // search for all images in gallery module CSS and serve them through the yui_image.php script
- $filecontent = preg_replace('/([a-z0-9_-]+)\.(png|gif)/', $relroot.'/theme/yui_image.php'.$sep.$version.'/'.$bits[0].'/'.$bits[1].'/$1.$2', $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()) {
- $slashargument = ltrim($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.');
- }
- }