Netty 实现HTTP重定向

FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.PERMANENT_REDIRECT); //设置重定向响应码 （临时重定向、永久重定向）
            HttpHeaders headers = response.headers();
            headers.set(HttpHeaderNames.ACCESS_CONTROL_ALLOW_HEADERS, "x-requested-with,content-type");
            headers.set(HttpHeaderNames.ACCESS_CONTROL_ALLOW_METHODS, "POST,GET");
            headers.set(HttpHeaderNames.ACCESS_CONTROL_ALLOW_ORIGIN, "*");
            headers.set(HttpHeaderNames.CONTENT_LENGTH, response.content().readableBytes());
            headers.set(HttpHeaderNames.LOCATION, url); //重定向URL设置
            handler.writeAndFlush(response)
                    .addListener(ChannelFutureListener.CLOSE);//解决写入完成后，客户端断开会报异常的问题