/**
* Validates a cached response to check it is still fresh and available
* to the client. All validation is based on the `max-age` Cache-Control
* header.
*
* // Get a response from the cache
* $response = Request::$cache->get('foo');
*
* // Test the response
* if (Request_Cache::validate_get($response))
* {
* // Return the valid cached response
* return $response;
* }
*
* @param Kohana_Response resposne
* @return boolean
*/
public static function validate_get(Kohana_Response $response)
{
// Get the Cache-Control Header
$cache_control = Request_Cache::parse_cache_control((array) $response->headers);
// If the response has expired
if ($cache_control['max-age'] + time() < time()) {
// Remove this entry
Request_Cache::delete($key);
// return false
return FALSE;
}
// Return true
return TRUE;
}
