/**
* Check the max-age directive
*
* @param array $cacheHeaders
* @param string $cacheBodyFile
*
* @return boolean
*/
protected static function cacheIsFresh(array $cacheHeaders, $cacheBodyFile)
{
$cacheTime = filemtime($cacheBodyFile);
$now = new \Datetime();
//Cache-Control
if (isset($cacheHeaders['Cache-Control'][0])) {
$cacheControl = static::parseCacheControl($cacheHeaders['Cache-Control'][0]);
//Max age
if (isset($cacheControl['max-age']) && $cacheTime + $cacheControl['max-age'] < $now->get('U')) {
return false;
}
}
//Expires
if (isset($cacheHeaders['Expires'][0])) {
$expires = new \Datetime($cacheHeaders['Expires'][0]);
if ($expires < $now) {
return false;
}
}
return true;
}
