176 lines
4.3 KiB
PHP
176 lines
4.3 KiB
PHP
<?php
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/**
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2009, StatusNet, Inc.
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*
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* Return a requested file
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*
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* PHP version 5
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category PrivateAttachments
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* @package StatusNet
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* @author Jeffery To <jeffery.to@gmail.com>
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* @copyright 2009 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET')) {
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exit(1);
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}
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require_once 'MIME/Type.php';
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/**
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* An action for returning a requested file
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*
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* The StatusNet system will do an implicit user check if the site is
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* private before allowing this to continue
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*
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* @category PrivateAttachments
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* @package StatusNet
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* @author Jeffery To <jeffery.to@gmail.com>
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* @copyright 2009 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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class GetfileAction extends Action
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{
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/**
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* Path of file to return
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*/
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var $path = null;
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/**
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* Get file name
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*
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* @param array $args $_REQUEST array
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*
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* @return success flag
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*/
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function prepare($args)
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{
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parent::prepare($args);
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$filename = $this->trimmed('filename');
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$path = null;
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if ($filename && File::validFilename($filename)) {
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$path = File::path($filename);
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}
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if (empty($path) or !file_exists($path)) {
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$this->clientError(_('No such file.'), 404);
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return false;
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}
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if (!is_readable($path)) {
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$this->clientError(_('Cannot read file.'), 403);
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return false;
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}
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$this->path = $path;
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return true;
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}
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/**
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* Is this page read-only?
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*
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* @return boolean true
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*/
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function isReadOnly($args)
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{
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return true;
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}
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/**
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* Last-modified date for file
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*
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* @return int last-modified date as unix timestamp
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*/
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function lastModified()
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{
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if (common_config('site', 'use_x_sendfile')) {
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return null;
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}
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return filemtime($this->path);
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}
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/**
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* etag for file
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*
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* This returns the same data (inode, size, mtime) as Apache would,
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* but in decimal instead of hex.
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*
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* @return string etag http header
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*/
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function etag()
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{
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if (common_config('site', 'use_x_sendfile')) {
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return null;
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}
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$cache = common_memcache();
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if($cache) {
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$key = common_cache_key('attachments:etag:' . $this->path);
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$etag = $cache->get($key);
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if($etag === false) {
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$etag = crc32(file_get_contents($this->path));
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$cache->set($key,$etag);
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}
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return $etag;
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}
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$stat = stat($this->path);
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return '"' . $stat['ino'] . '-' . $stat['size'] . '-' . $stat['mtime'] . '"';
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}
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/**
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* Handle input, produce output
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*
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* @param array $args $_REQUEST contents
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*
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* @return void
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*/
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function handle($args)
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{
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// undo headers set by PHP sessions
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$sec = session_cache_expire() * 60;
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header('Expires: ' . date(DATE_RFC1123, time() + $sec));
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header('Cache-Control: max-age=' . $sec);
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parent::handle($args);
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$path = $this->path;
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header('Content-Type: ' . MIME_Type::autoDetect($path));
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if (common_config('site', 'use_x_sendfile')) {
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header('X-Sendfile: ' . $path);
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} else {
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header('Content-Length: ' . filesize($path));
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readfile($path);
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}
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}
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}
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