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4f65d03b08
A warning is shown in the browser console if debugging is set, but it is not possible to return from the configFn and stop the module load attempt from continuing. The error is caught and an additional error is shown by yui_combo.php
284 lines
11 KiB
PHP
284 lines
11 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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$filecontent = '';
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$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 $part!\n";
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continue;
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}
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//debug($bits);
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$version = array_shift($bits);
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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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if (!defined('ABORT_AFTER_CONFIG_CANCEL')) {
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define('ABORT_AFTER_CONFIG_CANCEL', true);
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define('NO_UPGRADE_CHECK', true);
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define('NO_MOODLE_COOKIES', true);
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require($CFG->libdir.'/setup.php');
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}
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$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($bits);
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$modulename = $bits[0];
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$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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$bits[] = 'sam';
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}
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// For shifted YUI modules, we need the YUI module name in frankenstyle format.
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$frankenstylemodulename = join('-', array($version, $frankenstyle, $modulename));
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// By default, try and use the /yui/build directory.
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$frankenstylefilename = preg_replace('/' . $modulename . '/', $frankenstylemodulename, $filename);
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$contentfile = $dir . '/yui/build/' . $frankenstylemodulename . '/' . $frankenstylefilename;
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// If the shifted versions don't exist, fall back to the non-shifted file.
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if (!file_exists($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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$contentfile = "$CFG->libdir/yui/$part";
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} else {
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if ($version != $CFG->yui3version) {
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$content .= "\n// Wrong yui version $part!\n";
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continue;
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}
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$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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// 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() + $lifetime) .' GMT');
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header('Pragma: ');
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header('Cache-Control: public, max-age='.$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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