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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 images
- *
- * @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
- if ($slashargument = min_get_slash_argument()) {
- $path = ltrim($slashargument, '/');
- } else {
- $path = min_optional_param('file', '', 'SAFEPATH');
- }
- $etag = sha1($path);
- $parts = explode('/', $path);
- $version = array_shift($parts);
- if ($version === 'm') {
- $version = 'moodle';
- }
- if ($version == 'moodle' && count($parts) >= 3) {
- $frankenstyle = array_shift($parts);
- $module = array_shift($parts);
- $image = array_pop($parts);
- $subdir = join('/', $parts);
- $dir = core_component::get_component_directory($frankenstyle);
- // For shifted YUI modules, we need the YUI module name in frankenstyle format.
- $frankenstylemodulename = join('-', array($version, $frankenstyle, $module));
- // By default, try and use the /yui/build directory.
- $imagepath = $dir . '/yui/build/' . $frankenstylemodulename . '/assets/skins/sam/' . $image;
- // If the shifted versions don't exist, fall back to the non-shifted file.
- if (!file_exists($imagepath) or !is_file($imagepath)) {
- $imagepath = $dir . '/yui/' . $module . '/assets/skins/sam/' . $image;
- }
- } else if ($version == 'gallery' && count($parts) >= 3) {
- list($revision, $module, , , , $image) = $parts;
- $imagepath = "$CFG->dirroot/lib/yuilib/gallery/$module/assets/skins/sam/$image";
- } 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 = $yuipatchedversion[0];
- if (count($parts) == 1 && ($yuiversion == $CFG->yui3version || $yuiversion == $CFG->yui2version)) {
- list($image) = $parts;
- if ($yuiversion == $CFG->yui3version) {
- $imagepath = "$CFG->dirroot/lib/yuilib/$CFG->yui3version/assets/skins/sam/$image";
- } else {
- $imagepath = "$CFG->dirroot/lib/yuilib/2in3/$CFG->yui2version/build/assets/skins/sam/$image";
- }
- } else {
- yui_image_not_found();
- }
- }
- if (!file_exists($imagepath)) {
- yui_image_not_found();
- }
- $pathinfo = pathinfo($imagepath);
- $imagename = $pathinfo['filename'].'.'.$pathinfo['extension'];
- switch($pathinfo['extension']) {
- case 'gif' : $mimetype = 'image/gif'; break;
- case 'png' : $mimetype = 'image/png'; break;
- case 'jpg' : $mimetype = 'image/jpeg'; break;
- case 'jpeg' : $mimetype = 'image/jpeg'; break;
- case 'ico' : $mimetype = 'image/vnd.microsoft.icon'; break;
- default: $mimetype = 'document/unknown';
- }
- // if they are requesting a revision that's not -1, and they have supplied an
- // If-Modified-Since header, we can send back a 304 Not Modified since the
- // content never changes (the rev number is increased any time the content changes)
- if (strpos($path, '/-1/') === false and (!empty($_SERVER['HTTP_IF_NONE_MATCH']) || !empty($_SERVER['HTTP_IF_MODIFIED_SINCE']))) {
- $lifetime = 60*60*24*360; // 1 year, we do not change YUI versions often, there are a few custom yui modules
- header('HTTP/1.1 304 Not Modified');
- header('Last-Modified: '. gmdate('D, d M Y H:i:s', filemtime($imagepath)) .' GMT');
- header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
- header('Cache-Control: public, max-age='.$lifetime.', no-transform');
- header('Content-Type: '.$mimetype);
- header('Etag: "'.$etag.'"');
- die;
- }
- yui_image_cached($imagepath, $imagename, $mimetype, $etag);
- function yui_image_cached($imagepath, $imagename, $mimetype, $etag) {
- global $CFG;
- require("$CFG->dirroot/lib/xsendfilelib.php");
- $lifetime = 60*60*24*360; // 1 year, we do not change YUI versions often, there are a few custom yui modules
- header('Content-Disposition: inline; filename="'.$imagename.'"');
- header('Last-Modified: '. gmdate('D, d M Y H:i:s', filemtime($imagepath)) .' GMT');
- header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
- header('Pragma: ');
- header('Cache-Control: public, max-age=315360000, no-transform');
- header('Accept-Ranges: none');
- header('Content-Type: '.$mimetype);
- header('Content-Length: '.filesize($imagepath));
- header('Etag: "'.$etag.'"');
- if (xsendfile($imagepath)) {
- die;
- }
- // no need to gzip already compressed images ;-)
- readfile($imagepath);
- die;
- }
- function yui_image_not_found() {
- header('HTTP/1.0 404 not found');
- die('Image was not found, sorry.');
- }
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