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 $version = array_shift($parts);
  35
  36 if ($version == 'moodle' && count($parts) >= 3) {
  37     //TODO: this is a ugly hack because we should not load any libs here!
  38     define('MOODLE_INTERNAL', true);
  39     require_once($CFG->libdir.'/moodlelib.php');
  40     $frankenstyle = array_shift($parts);
  41     $module = array_shift($parts);
  42     $image = array_pop($parts);
  43     $subdir = join('/', $parts);
  44     $dir = get_component_directory($frankenstyle);
  45     $imagepath = $dir.'/yui/'.$module.'/assets/skins/sam/'.$image;
  46 } else if ($version == 'gallery' && count($parts)==3) {
  47     list($module, $version, $image) = $parts;
  48     $imagepath = "$CFG->dirroot/lib/yui/gallery/$module/$version/assets/skins/sam/$image";
  49 } else if (count($parts) == 1 && ($version == $CFG->yui3version || $version == $CFG->yui2version)) {
  50     list($image) = $parts;
  51     if ($version == $CFG->yui3version) {
  52         $imagepath = "$CFG->dirroot/lib/yui/$CFG->yui3version/build/assets/skins/sam/$image";
  53     } else  {
  54         $imagepath = "$CFG->dirroot/lib/yui/$CFG->yui2version/build/assets/skins/sam/$image";
  55     }
  56 } else {
  57     yui_image_not_found();
  58 }
  59
  60 if (!file_exists($imagepath)) {
  61     yui_image_not_found();
  62 }
  63
  64 yui_image_cached($imagepath);
  65
  66
  67
  68 function yui_image_cached($imagepath) {
  69     $lifetime = 60*60*24*300; // 300 days === forever
  70     $pathinfo = pathinfo($imagepath);
  71     $imagename = $pathinfo['filename'].'.'.$pathinfo['extension'];
  72
  73     switch($pathinfo['extension']) {
  74         case 'gif' : $mimetype = 'image/gif'; break;
  75         case 'png' : $mimetype = 'image/png'; break;
  76         case 'jpg' : $mimetype = 'image/jpeg'; break;
  77         case 'jpeg' : $mimetype = 'image/jpeg'; break;
  78         case 'ico' : $mimetype = 'image/vnd.microsoft.icon'; break;
  79         default: $mimetype = 'document/unknown';
  80     }
  81
  82     header('Content-Disposition: inline; filename="'.$imagename.'"');
  83     header('Last-Modified: '. gmdate('D, d M Y H:i:s', filemtime($imagepath)) .' GMT');
  84     header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
  85     header('Pragma: ');
  86     header('Cache-Control: max-age=315360000');
  87     header('Accept-Ranges: none');
  88     header('Content-Type: '.$mimetype);
  89     header('Content-Length: '.filesize($imagepath));
  90
  91     // no need to gzip already compressed images ;-)
  92
  93     readfile($imagepath);
  94     die;
  95 }
  96
  97 function yui_image_not_found() {
  98     header('HTTP/1.0 404 not found');
  99     die('Image was not found, sorry.');
 100 }