前言

主要是为网关做一个可以动态增加，删除白名单的功能，以达到可以直接修改 URL 就可以做过滤，而不必修改本机白名单文件再重启项目。由于1.x 和 2.x 关于刷新那块不一致，说明下环境：

• Spring Boot 2.0.3.RELEASE
• Spring Cloud Finchley. RELEASE
• Spring Cloud Config
• Spring Cloud Bus
• RabbitMQ

Config Server配置

除了配置一个简单的Config Server，还要额外加入bus 和 actuator 依赖。

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>

部分相关配置

spring:
  cloud:
    config:
      server:
        git:
          uri: 
          search-paths: config-repo
          username:
          password:
    bus:
      trace:
        enabled: true # 跟踪总线事件

  rabbitmq:
      host: 127.0.0.1
      port: 5672
      username: test
      password: 123456
endpoints:
  default:
    web:
      enabled: true
management:
  endpoints:
    web:
      exposure:
        include: "*"

网关端配置

网关这里作为Config-Server的一个Client连接，不过还是通过注册中心连接。

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>
 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

部分相关配置

spring:
  cloud:
    config:
      profile: dev
      label: master
      fail-fast: true
      name: gateway-config
      discovery:
        enabled: true
        # config-server's application name
        service-id: config-server
  rabbitmq:
      host: 127.0.0.1
      port: 5672
      username: test
      password: 123456
zuul:
  #ignored-services: consul
  retryable: true

endpoints:
  default:
    web:
      enabled: true
management:
  endpoints:
    web:
      exposure:
        include: bus-refresh

@Component
@RefreshScope
public class WhiteListPool {

    @Value("${white.list}")
    public Set<String> value;

    public Set<String> getValue() {
        System.out.println(value.toString());
        return value;
    }
}

@Slf4j
public class SimpleFilter extends ZuulFilter {

    @Autowired
    private WhiteListPool pool;

    @Override
    public String filterType() {
        return "pre";
    }

    @Override
    public int filterOrder() {
        return 1;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() {
        ...
    }

    public  boolean isWhiteList(String url){
        return pool.getValue().stream().anyMatch(url::contains);
    }
}

active

• 改变配置仓库中的配置文件
• 触发config-server的刷新通知
  http://localhost:5555/actuator/bus-refresh
  2.0之前http://localhost:5555/bus/refresh
• 跟踪总线事件
  http://localhost:5555/actuator/httptrace
  2.0之前http://localhost:5555/trace
• 访问网关已会验证最新白名单