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