protected function getHeaders($params)
    {
        $headers = array();
        
        foreach ($params as $name => $value) {
            if (substr($name, 0, 5) === 'HTTP_') {
                $key = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))));
                $headers[$key] = $value;
            }
        }
        
        return $headers;
    }