theme/yui_image.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * This file is responsible for serving of yui images
  20  *
  21  * @package   moodlecore
  22  * @copyright 2009 Petr Skoda (skodak)  {@link http://skodak.org}
  23  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26
  27 // we need just the values from config.php and minlib.php
  28 define('ABORT_AFTER_CONFIG', true);
  29 require('../config.php'); // this stops immediately at the beginning of lib/setup.php
  30
  31 $path = min_optional_param('file', '', 'SAFEPATH');
  32
  33 $parts = explode('/', $path);
  34 if (count($parts) != 2) {
  35     yui_image_not_found();
  36 }
  37 list($version, $image) = $parts;
  38
  39 if ($version == $CFG->yui3version) {
  40     $imagepath = "$CFG->dirroot/lib/yui/$CFG->yui3version/build/assets/skins/sam/$image";
  41 } else if ($version == $CFG->yui2version) {
  42     $imagepath = "$CFG->dirroot/lib/yui/$CFG->yui2version/build/assets/skins/sam/$image";
  43 } else {
  44     yui_image_not_found();
  45 }
  46
  47 if (!file_exists($imagepath)) {
  48     yui_image_not_found();
  49 }
  50
  51 yui_image_cached($imagepath);
  52
  53
  54
  55 function yui_image_cached($imagepath) {
  56     $lifetime = 60*60*24*300; // 300 days === forever
  57     $pathinfo = pathinfo($imagepath);
  58     $imagename = $pathinfo['filename'].'.'.$pathinfo['extension'];
  59
  60     switch($pathinfo['extension']) {
  61         case 'gif' : $mimetype = 'image/gif'; break;
  62         case 'png' : $mimetype = 'image/png'; break;
  63         case 'jpg' : $mimetype = 'image/jpeg'; break;
  64         case 'jpeg' : $mimetype = 'image/jpeg'; break;
  65         case 'ico' : $mimetype = 'image/vnd.microsoft.icon'; break;
  66         default: $mimetype = 'document/unknown';
  67     }
  68
  69     header('Content-Disposition: inline; filename="'.$imagename.'"');
  70     header('Last-Modified: '. gmdate('D, d M Y H:i:s', filemtime($imagepath)) .' GMT');
  71     header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
  72     header('Pragma: ');
  73     header('Cache-Control: max-age=315360000');
  74     header('Accept-Ranges: none');
  75     header('Content-Type: '.$mimetype);
  76     header('Content-Length: '.filesize($imagepath));
  77
  78     // no need to gzip already compressed images ;-)
  79
  80     readfile($imagepath);
  81     die;
  82 }
  83
  84 function yui_image_not_found() {
  85     header('HTTP/1.0 404 not found');
  86     die('Image was not found, sorry.');
  87 }