header("Last-Modified: " . $last_modified);
// 设置文件类型信息
header($p_type);
header("Content-Length: " . $content_length);
}
define('ABSPATH', dirname(__file__) . '/');
$cache = true;
$cachedir = 'cache/'; //存放 gz 文件的目录,确保可写
if (empty($_SERVER['QUERY_STRING']))
exit();
$gzip = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip');
if (empty($gzip))
$cache = false;
$key = array_shift(explode('?', $_SERVER['QUERY_STRING']));
$key = str_replace('../', '', $key);
$filename = ABSPATH . $key;
$symbol = '_';
$rel_path = str_replace(ABSPATH, '', dirname($filename));
$namespace = str_replace('/', $symbol, $rel_path);
$cache_filename = ABSPATH . $cachedir . $namespace . $symbol . basename($filename) .
'.gz'; //生成 gz 文件路径
$ext = array_pop(explode('.', $filename)); //根据后缀判断文件类型信息
$type = "Content-type: text/html"; //默认的文件类型
switch ($ext)
{
case 'css':
$type = "Content-type: text/css";
break;
case 'js':
$type = "Content-type: text/javascript";
break;
case 'gif':