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<?php
/**
* CommonPlugin for phplist.
*
* This file is a part of CommonPlugin.
*
* @category phplist
*
* @author Duncan Cameron
* @copyright 2011-2018 Duncan Cameron
* @license http://www.gnu.org/licenses/gpl.html GNU General Public License, Version 3
*/
namespace phpList\plugin\Common;
use DateInterval;
use DateTime;
/**
* This class serves files.
*/
class FileServer
{
private $expire = 604800;
public function __construct($expire = null)
{
if ($expire) {
$this->expire = $expire;
}
}
/**
* This method is used to send a file, such as an image or css, to the browser with appropriate http headers.
*
* @param string $filepath path to the file
* @param string $contentType content type to be used
*/
public function serveFile($filepath, $contentType = null)
{
if (!file_exists($filepath)) {
header('HTTP/1.0 404 Not Found');
return;
}
$mtime = new DateTime('@' . filemtime($filepath));
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
$since = new DateTime($_SERVER['HTTP_IF_MODIFIED_SINCE']);
if ($mtime <= $since) {
header('HTTP/1.1 304 Not Modified');
return;
}
}
$expiry = new DateTime();
$expiry->add(new DateInterval('PT' . $this->expire . 'S'));
header('Expires: ' . $expiry->format(DateTime::RFC1123));
header("Cache-Control: max-age={$this->expire}");
header('Last-Modified: ' . $mtime->format(DateTime::RFC1123));
header('Pragma:');
if (!$contentType) {
$ext = pathinfo($filepath, PATHINFO_EXTENSION);
$contentTypes = [
'bmp' => 'image/bmp',
'css' => 'text/css',
'gif' => 'image/gif',
'jpeg' => 'image/jpeg',
'jpg' => 'image/jpeg',
'js' => 'text/javascript',
'png' => 'image/png',
];
$contentType = $contentTypes[$ext] ?? 'application/octet-stream';
}
header("Content-type: $contentType");
header('Content-Length: ' . filesize($filepath));
readfile($filepath);
}
}