if (maxContentLength != null && responseData.getContentLength() > maxContentLength.longValue()) {
            throw new MaxLengthExceededException("The content length (" + responseData.getContentLength() + " byte) is over "
                    + maxContentLength.longValue() + " byte. The url is " + responseData.getUrl());
        }
    }

    /**
     * Performs a GET request.