<?php /** * StatusNet - the distributed open-source microblogging tool * Copyright (C) 2009, StatusNet, Inc. * * Return a requested file * * PHP version 5 * * 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/>. * * @category PrivateAttachments * @package StatusNet * @author Jeffery To <jeffery.to@gmail.com> * @copyright 2009 StatusNet, Inc. * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0 * @link http://status.net/ */ if (!defined('GNUSOCIAL')) { exit(1); } /** * An action for returning a requested file * * The StatusNet system will do an implicit user check if the site is * private before allowing this to continue * * @category PrivateAttachments * @package StatusNet * @author Jeffery To <jeffery.to@gmail.com> * @copyright 2009 StatusNet, Inc. * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0 * @link http://status.net/ */ class GetfileAction extends Action { /** * Path of file to return */ var $path = null; /** * Get file name * * @param array $args $_REQUEST array * * @return success flag */ protected function prepare(array $args=array()) { parent::prepare($args); $filename = $this->trimmed('filename'); $path = null; if ($filename && File::validFilename($filename)) { $path = File::path($filename); } if (empty($path) or !file_exists($path)) { // TRANS: Client error displayed when requesting a non-existent file. $this->clientError(_('No such file.'), 404); } if (!is_readable($path)) { // TRANS: Client error displayed when requesting a file without having read access to it. $this->clientError(_('Cannot read file.'), 403); } $this->path = $path; return true; } /** * Is this page read-only? * * @return boolean true */ function isReadOnly($args) { return true; } /** * Last-modified date for file * * @return int last-modified date as unix timestamp */ function lastModified() { if (common_config('site', 'use_x_sendfile')) { return null; } return filemtime($this->path); } /** * etag for file * * This returns the same data (inode, size, mtime) as Apache would, * but in decimal instead of hex. * * @return string etag http header */ function etag() { if (common_config('site', 'use_x_sendfile')) { return null; } $cache = Cache::instance(); if($cache) { $key = Cache::key('attachments:etag:' . $this->path); $etag = $cache->get($key); if($etag === false) { $etag = crc32(file_get_contents($this->path)); $cache->set($key,$etag); } return $etag; } $stat = stat($this->path); return '"' . $stat['ino'] . '-' . $stat['size'] . '-' . $stat['mtime'] . '"'; } /** * Handle input, produce output * * @return void */ protected function handle() { // undo headers set by PHP sessions $sec = session_cache_expire() * 60; header('Expires: ' . date(DATE_RFC1123, time() + $sec)); header('Cache-Control: max-age=' . $sec); parent::handle(); $path = $this->path; $finfo = new finfo(FILEINFO_MIME_TYPE); header('Content-Type: ' . $finfo->file($path)); if (common_config('site', 'use_x_sendfile')) { header('X-Sendfile: ' . $path); } else { header('Content-Length: ' . filesize($path)); readfile($path); } } }