100 lines
No EOL
3.6 KiB
PHP
100 lines
No EOL
3.6 KiB
PHP
<?php
|
|
|
|
/** This file is part of KCFinder project
|
|
*
|
|
* @desc HTTP cache helper class
|
|
* @package KCFinder
|
|
* @version 3.12
|
|
* @author Pavel Tzonkov <sunhater@sunhater.com>
|
|
* @copyright 2010-2014 KCFinder Project
|
|
* @license http://opensource.org/licenses/GPL-3.0 GPLv3
|
|
* @license http://opensource.org/licenses/LGPL-3.0 LGPLv3
|
|
* @link http://kcfinder.sunhater.com
|
|
*/
|
|
|
|
namespace kcfinder;
|
|
|
|
class httpCache {
|
|
const DEFAULT_TYPE = "text/html";
|
|
const DEFAULT_EXPIRE = 604800; // in seconds
|
|
|
|
/** Cache a file. The $type parameter might define the MIME type of the file
|
|
* or path to magic file to autodetect the MIME type. If you skip $type
|
|
* parameter the method will try with the default magic file. Autodetection
|
|
* of MIME type requires Fileinfo PHP extension used in file::getMimeType()
|
|
* @param string $file
|
|
* @param string $type
|
|
* @param integer $expire
|
|
* @param array $headers */
|
|
|
|
static function file($file, $type=null, $expire=null, array $headers=null) {
|
|
$mtime = @filemtime($file);
|
|
if ($mtime !== false) self::checkMTime($mtime);
|
|
|
|
if ($type === null) {
|
|
$magic = ((substr($type, 0, 1) == "/") || preg_match('/^[a-z]\:/i', $type))
|
|
? $type : null;
|
|
$type = file::getMimeType($file, $magic);
|
|
if (!$type) $type = null;
|
|
}
|
|
|
|
self::content(@file_get_contents($file), $mtime, $type, $expire, $headers, false);
|
|
}
|
|
|
|
/** Cache the given $content with $mtime modification time.
|
|
* @param binary $content
|
|
* @param integer $mtime
|
|
* @param string $type
|
|
* @param integer $expire
|
|
* @param array $headers
|
|
* @param bool $checkMTime */
|
|
|
|
static function content($content, $mtime, $type=null, $expire=null, array $headers=null, $checkMTime=true) {
|
|
if ($checkMTime) self::checkMTime($mtime);
|
|
if ($type === null) $type = self::DEFAULT_TYPE;
|
|
if ($expire === null) $expire = self::DEFAULT_EXPIRE;
|
|
$size = strlen($content);
|
|
$expires = gmdate("D, d M Y H:i:s", time() + $expire) . " GMT";
|
|
header("Content-Type: $type");
|
|
header("Expires: $expires");
|
|
header("Cache-Control: max-age=$expire");
|
|
header("Pragma: !invalid");
|
|
header("Content-Length: $size");
|
|
if ($headers !== null) foreach ($headers as $header) header($header);
|
|
echo $content;
|
|
}
|
|
|
|
/** Check if given modification time is newer than client-side one. If not,
|
|
* the method will tell the client to get the content from its own cache.
|
|
* Afterwards the script process will be terminated. This feature requires
|
|
* the PHP to be configured as Apache module.
|
|
* @param integer $mtime
|
|
* @param mixed $sendHeaders */
|
|
|
|
static function checkMTime($mtime, $sendHeaders=null) {
|
|
header("Last-Modified: " . gmdate("D, d M Y H:i:s", $mtime) . " GMT");
|
|
|
|
$headers = function_exists("getallheaders")
|
|
? getallheaders()
|
|
: (function_exists("apache_request_headers")
|
|
? apache_request_headers()
|
|
: false);
|
|
|
|
if (is_array($headers) && isset($headers['If-Modified-Since'])) {
|
|
$client_mtime = explode(';', $headers['If-Modified-Since']);
|
|
$client_mtime = @strtotime($client_mtime[0]);
|
|
if ($client_mtime >= $mtime) {
|
|
header('HTTP/1.1 304 Not Modified');
|
|
if (is_array($sendHeaders) && count($sendHeaders))
|
|
foreach ($sendHeaders as $header)
|
|
header($header);
|
|
elseif ($sendHeaders !== null)
|
|
header($sendHeaders);
|
|
die;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
?>
|