1<?php 2/** 3 * @license GPL 2 (http://www.gnu.org/licenses/gpl.html) 4 * @author Andreas Gohr <gohr@cosmocode.de> 5 */ 6 7if(!defined('DOKU_INC')) define('DOKU_INC', dirname(__FILE__) . '/../../../'); 8define('NOSESSION', true); 9require_once(DOKU_INC . 'inc/init.php'); 10global $conf; 11 12$cache = getCacheName($_GET['img'], '.mathpublish.png'); 13if(!file_exists($cache)) _fail(); 14$time = filemtime($cache); 15 16header('Content-Type: image/png;'); 17header('Expires: ' . gmdate("D, d M Y H:i:s", time() + max($conf['cachetime'], 3600)) . ' GMT'); 18header('Cache-Control: public, proxy-revalidate, no-transform, max-age=' . max($conf['cachetime'], 3600)); 19header('Pragma: public'); 20http_conditionalRequest($time); 21http_sendfile($cache); // exits if x-sendfile support 22$fp = @fopen($cache, "rb"); 23if($fp) { 24 http_rangeRequest($fp, filesize($cache), 'image/png'); 25} else { 26 http_status(500); 27 print 'Could not read file - bad permissions?'; 28} 29 30function _fail() { 31 http_status(404); 32 header('Content-Type: image/png'); 33 echo io_readFile(__DIR__ . '/broken.png', false); 34 exit; 35} 36 37