class HttpHeadersImpl implements HttpHeaders {

    @Override
    public int getLength() {
        String value = nettyHttpHeaders.get(HttpHeaders.CONTENT_LENGTH);
        if (value == null || value.isEmpty()) {
            return -1;
        }
        int length = Integer.parseInt(value);
        return length >= 0 ? length : -1;
    }

    public  HttpHeadersImpl(io.netty.handler.codec.http.HttpHeaders httpHeaders);

}