public function getRawBody()
    {
        if (null === $this->_rawBody) {
            $body = file_get_contents('php://input');

            if (strlen(trim($body)) > 0) {
                $this->_rawBody = $body;
            } else {
                $this->_rawBody = false;
            }
        }
        return $this->_rawBody;
    }