Subversion Repositories cheapmusic

<?php
include_once ($_SERVER['DOCUMENT_ROOT'] . "/php/dnsexit.php");
 
//set array of allowed file types to prevent abuse
$allowed = array('css','js','png','jpg','jpeg','gif','svg','ico');
 
//check for request variable existence and that file type is allowed
if(isset($_GET['file']) && isset($_GET['type']) && in_array(substr($_GET['file'],strrpos($_GET['file'],'.')+1), $allowed)) {
        if (!$data = @file_get_contents(dirname(__FILE__).'/'.$_GET['file'])) { // grab the file contents
            exit;
    }
 
        $etag = '"'.md5($data).'"'; // generate a file Etag
        header('ETag: '.$etag); // output the Etag in the header
 
        // output the content-type header for each file type
        switch ($_GET['type']) {
                case 'css':
                        header ("Content-Type: text/css; charset: UTF-8");
                break;
 
                case 'js':
                        header ("Content-Type: text/javascript; charset: UTF-8");
                break;
 
                case 'png':
                        header ("Content-Type: image/png");
                break;
 
                case 'jpg':
                case 'jpeg':
                        header ("Content-Type: image/jpeg");
                break;
 
                case 'gif':
                        header ("Content-Type: image/gif");
                break;
 
                case 'svg':
                        header ("Content-Type: image/svg+xml");
                break;
 
                case 'ico':
                        header ("Content-Type: image/vnd.microsoft.icon");
                break;
        }
 
        header('Cache-Control: max-age=86400, public'); //output the cache-control header
 
        // check the Etag the browser already has for the file and only serve the file if it is different
        if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && $etag == $_SERVER['HTTP_IF_NONE_MATCH']) {
                header('HTTP/1.1 304 Not Modified');
                header('Content-Length: 0');
        } else {
                echo $data;
        }
}
?>