Feign 請求攔截器

@Component
public class UserContextInterceptor implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate requestTemplate) {
        UserContext userContext = UserContextHolder.getUserContext();
        requestTemplate.header(UserContext.CORRELATION_ID, userContext.getCorrelationId());
    }
}

SpringCloud應用中，通過feign的方式實現http的調用，可以通過實現feign.RequestInterceptor接口在feign執行后進行攔截，對請求頭等信息進行修改