Feign/Eureka客户端未传递X-Forwarded-For标头 [英] Feign/Eureka client not passing X-Forwarded-For header

问题描述

我使用Spring boot + Eureka + Feign客户端将请求从一台发现的服务器转发到另一台，并且工作正常.

I use Spring boot + Eureka + Feign client to forward requests from one discovered server to another and it works fine.

在我的服务器中，我需要获取原始用户的IP.

In my server I need to get the IP of the original user.

我似乎找不到如何配置Feign客户端以自动编辑"X-Forwarded-For"标头，以便能够提取原始用户的IP地址.

I can't seem to find how to configure Feign client to automatically edit the 'X-Forwarded-For' header so I could be able to extract the original user's IP address.

当我使用getRemoteAddr()时，我获得了代理IP地址(如预期的那样). 尝试提取request.getHeader("X-Forwarded-For")时，我总是得到null.

When I use getRemoteAddr() I get the proxy IP address (As expected). When Trying to extract the request.getHeader("X-Forwarded-For") I always get null.

我应该在哪里添加/配置此功能?

Where should I add / configure this feature?

推荐答案

您需要添加自己的拦截器，该拦截器会将此标头添加到请求中.

You need to add your own interceptor which adds this header to requests.

Feign文档中的一个很好的例子(但可能在问这个问题时还不存在):

There is a good example in Feign docs (but probably it wasn't there at the time of asking this question):

static class ForwardedForInterceptor implements RequestInterceptor {
  @Override public void apply(RequestTemplate template) {
    template.header("X-Forwarded-For", "origin.host.com");
  }
}

public class Example {
  public static void main(String[] args) {
    Bank bank = Feign.builder()
                 .decoder(accountDecoder)
                 .requestInterceptor(new ForwardedForInterceptor())
                 .target(Bank.class, "https://api.examplebank.com");
  }
}

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