Zuul 路由配置详解

1. sensitiveHeaders：会过滤客户端请求中的和该配置项匹配的headers

2. 有时经过网关调用子系统，须要把header带上，以确保session的一致，Feign Client 之间相互调用时默认不会传递Header 信息。若是要在Feign Client之间传递Header 信息就须要手动添加拦截器设置。

@Bean
    public RequestInterceptor headerInterceptor() {
        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate requestTemplate) {
                ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
                        .getRequestAttributes();
                HttpServletRequest request = attributes.getRequest();
                Enumeration<String> headerNames = request.getHeaderNames();
                if (headerNames != null) {
                    while (headerNames.hasMoreElements()) {
                        String name = headerNames.nextElement();
                        String values = request.getHeader(name);
                        requestTemplate.header(name, values);
                    }
                }
            }
        };
    }

     参考：http://blog.csdn.net/u014519194/article/details/77160958、https://www.jianshu.com/p/10429b5c22ce