little-proxy - LittleProxy clientToProxyRequest 调用了两次

Question

我将 LitteProxy 配置为反向代理并尝试实现过滤器。当我发送 HTTP GET 时，会调用 clientToProxyRequest 过滤器适配器两次。一次使用DefaultHttpRequest作为httpObject，第二次使用LastHttpContent。这可能与块有关吗？我该怎么做？

HttpProxyServerBootstrap bs = DefaultHttpProxyServer.bootstrap();
    //reverse proxy
    bs.withAllowRequestToOriginServer(true);

过滤器创建为：

new HttpFiltersAdapter(originalRequest) {
        @Override
       public HttpResponse clientToProxyRequest(HttpObject httpObject) {
            //doing filtering here..
            return null;
       }
}