mirror of
https://github.com/moodle/moodle.git
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234 lines
8.3 KiB
PHP
234 lines
8.3 KiB
PHP
<?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 images
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*
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* @package moodlecore
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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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$lastmodified = 0;
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foreach ($parts as $part) {
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if (empty($part)) {
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continue;
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}
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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 $part!\n";
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continue;
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}
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//debug($bits);
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$version = array_shift($bits);
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if ($version == 'moodle') {
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//TODO: this is a ugly hack because we should not load any libs here!
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if (!defined('MOODLE_INTERNAL')) {
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define('MOODLE_INTERNAL', true);
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require_once($CFG->libdir.'/moodlelib.php');
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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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$dir = get_component_directory($frankenstyle);
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if ($mimetype == 'text/css') {
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$bits[] = 'assets';
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$bits[] = 'skins';
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$bits[] = 'sam';
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}
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$contentfile = $dir.'/yui/'.join('/', $bits).'/'.$filename;
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} else {
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if ($version != $CFG->yui3version and $version != $CFG->yui2version and $version != 'gallery') {
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$content .= "\n// Wrong yui version $part!\n";
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continue;
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}
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$contentfile = "$CFG->libdir/yui/$part";
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}
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if (!file_exists($contentfile) or !is_file($contentfile)) {
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$content .= "\n// Combo resource $part ($contentfile) not found!\n";
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continue;
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}
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$filecontent = file_get_contents($contentfile);
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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 ($version == 'moodle') {
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$filecontent = preg_replace('/([a-z0-9_-]+)\.(png|gif)/', $relroot.'/theme/yui_image.php'.$sep.$version.'/'.$frankenstyle.'/'.array_shift($bits).'/$1.$2', $filecontent);
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} else if ($version == 'gallery') {
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// search for all images in gallery module 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.$version.'/'.$bits[0].'/'.$bits[1].'/$1.$2', $filecontent);
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} else {
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// First we need to remove relative paths to images. These are used by YUI modules to make use of global assets.
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// I've added this as a separate regex so it can be easily removed once
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// YUI standardise there CSS methods
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$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', $filecontent);
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}
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}
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$content .= $filecontent;
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}
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if ($lastmodified == 0) {
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$lastmodified = time();
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}
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if ($cache) {
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combo_send_cached($content, $mimetype, $etag, $lastmodified);
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} else {
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combo_send_uncached($content, $mimetype);
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}
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/**
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* Send the JavaScript cached
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* @param string $content
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* @param string $mimetype
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* @param string $etag
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* @param int $lastmodified
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*/
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function combo_send_cached($content, $mimetype, $etag, $lastmodified) {
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$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('Content-Disposition: inline; filename="combo"');
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header('Last-Modified: '. gmdate('D, d M Y H:i:s', $lastmodified) .' GMT');
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header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
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header('Pragma: ');
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header('Cache-Control: max-age='.$lifetime);
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header('Accept-Ranges: none');
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header('Content-Type: '.$mimetype);
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header('Etag: '.$etag);
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if (!min_enable_zlib_compression()) {
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header('Content-Length: '.strlen($content));
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}
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echo $content;
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die;
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}
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/**
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* Send the JavaScript uncached
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* @param string $content
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* @param string $mimetype
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*/
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function combo_send_uncached($content, $mimetype) {
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header('Content-Disposition: inline; filename="combo"');
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header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
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header('Expires: '. gmdate('D, d M Y H:i:s', time() + 2) .' GMT');
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header('Pragma: ');
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header('Accept-Ranges: none');
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header('Content-Type: '.$mimetype);
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if (!min_enable_zlib_compression()) {
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header('Content-Length: '.strlen($content));
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}
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echo $content;
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die;
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}
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function combo_not_found($message = '') {
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header('HTTP/1.0 404 not found');
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if ($message) {
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echo $message;
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} else {
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echo 'Combo resource not found, sorry.';
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}
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die;
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}
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function combo_params() {
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if (isset($_SERVER['QUERY_STRING']) and strpos($_SERVER['QUERY_STRING'], 'file=/') === 0) {
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// url rewriting
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$slashargument = substr($_SERVER['QUERY_STRING'], 6);
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return array($slashargument, true);
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} else if (isset($_SERVER['REQUEST_URI']) and strpos($_SERVER['REQUEST_URI'], '?') !== false) {
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$parts = explode('?', $_SERVER['REQUEST_URI'], 2);
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return array($parts[1], false);
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} else if (isset($_SERVER['QUERY_STRING']) and strpos($_SERVER['QUERY_STRING'], '?') !== false) {
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// note: buggy or misconfigured IIS does return the query string in REQUEST_URI
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return array($_SERVER['QUERY_STRING'], false);
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} else if ($slashargument = min_get_slash_argument()) {
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$slashargument = ltrim($slashargument, '/');
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return array($slashargument, true);
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} else {
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// unsupported server, sorry!
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combo_not_found('Unsupported server - query string can not be determined, try disabling YUI combo loading in admin settings.');
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}
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}
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