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<?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('STATUSNET')) {
exit(1);
}
require_once 'MIME/Type.php';
/**
* 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 $_REQUEST array
*
* @return success flag
*/
function prepare($args)
{
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)) {
$this->clientError(_('No such file.'), 404);
return false;
}
if (!is_readable($path)) {
$this->clientError(_('Cannot read file.'), 403);
return false;
}
$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;
}
$cache = common_memcache();
if($cache) {
$key = common_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
*
* @param array $args $_REQUEST contents
*
* @return void
*/
function handle($args)
{
// undo headers set by PHP sessions
$sec = session_cache_expire() * 60;
header('Expires: ' . date(DATE_RFC1123, time() + $sec));
header('Cache-Control: max-age=' . $sec);
parent::handle($args);
$path = $this->path;
header('Content-Type: ' . MIME_Type::autoDetect($path));
if (common_config('site', 'use_x_sendfile')) {
header('X-Sendfile: ' . $path);
} else {
header('Content-Length: ' . filesize($path));
readfile($path);
}
}
}
|
