gnu-social/actions/file.php

<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, 2009, Control Yourself, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

if (!defined('LACONICA')) { exit(1); }

require_once(INSTALLDIR.'/actions/shownotice.php');

class FileAction extends ShowNoticeAction
{
    function showPage() {
        $source_url = common_local_url('file', array('notice' => $this->notice->id));
        $query = "select file_redirection.url as url from file join file_redirection on file.id = file_redirection.file_id where file.url = '$source_url'";
        $file = new File_redirection;
        $file->query($query);
        $file->fetch();
        if (empty($file->url)) {
            die('nothing attached here');
        } else {
            header("Location: {$file->url}");
            die();
        }
    }
}