选择目标主机后伪装+功能区请求拦截 [英] Feign + Ribbon request interception AFTER target host is choosen

问题描述

我目前正在做什么(这是非常简单方便的方式):

What I'm currently doing (which is very simple and convenient way):

Feign.builder()
.client(RibbonClient.create())
...
.requestInterceptor(new MyInterceptor())

但是在功能区实际解析目标主机之前发生拦截. 问题是，必须根据目标主机的名称来创建我要添加的一个标头.

But interception occur before ribbon actually resolve target host. Problem is, that one header that I want to add, have to be created based on the name of the target host.

在主机解析后，我是否还能操作标头?

Is there anyway I can manipulate headers after host is resolved?

推荐答案

我找到了针对此问题的以下解决方案.而不是使用Feign拦截器，而是使用RibbonClient委托:

I have found following solution for this problem. Instead of using Feign interceptor I use RibbonClient delegate:

Feign.builder()
.client(RibbonClient.builder().delegate(new MyDelegate())
...

MyDelegate扩展了feign.Client.Default类并覆盖了public Response execute(Request request, Request.Options options)方法.

MyDelegate extends feign.Client.Default class and overrides public Response execute(Request request, Request.Options options) method.

通过这种方式，我可以通过URI.create(request.url()).getHost()访问目标主机.

In this way I can access target host by URI.create(request.url()).getHost().

然后我创建新的请求，添加标题并运行super.execute(newRequest, options)作为最后一条指令.

Then I create new Request, add my header and run super.execute(newRequest, options) as the last instruction.

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