renderer.php

<?php
/**
 * DokuWiki Plugin PreserveFilenames / renderer.php
 *
 * @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author  Kazutaka Miyasaka <kazmiya@gmail.com>
 */

// must be run within DokuWiki
if (!defined('DOKU_INC')) {
    die();
}

if (!defined('DOKU_PLUGIN')) {
    define('DOKU_PLUGIN', DOKU_INC . 'lib/plugins/');
}

require_once(DOKU_INC . 'inc/parser/code.php');
require_once(DOKU_PLUGIN . 'preservefilenames/common.php');

class renderer_plugin_preservefilenames extends Doku_Renderer_code
{
    /**
     * Outputs code snippet with a correct filename
     * 
     * @see Doku_Renderer_code::code
     */
    function code($text, $language = NULL, $filename = '')
    {
        // do nothing if codeblock number not matched
        if ($_REQUEST['codeblock'] != $this->_codeblock++) {
            return;
        }

        $common = new PreserveFilenames_Common();

        $language = $common->_sanitizeFilename($language);

        if (!$language) {
            $language = 'txt';
        }

        $filename = $common->_correctBasename($filename);
        $filename = $common->_sanitizeFilename($filename);

        if (!$filename) {
            $filename = 'snippet.' . $language;
        }

        header('Content-Type: text/plain; charset=utf-8');
        header($common->_buildContentDispositionHeader('download', $filename, 'no_pathinfo'));
        header('X-Robots-Tag: noindex');
        print trim($text, "\r\n");
        exit;
    }
}