Eureka：扩展ClientFilter实现服务注册自定义过滤

Jersey clientFilter 过滤

eureka-wiki

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POM依赖:

    com.sun.jersey
    jersey-client
    1.19.1

实现抽象类ClientFilter的handle方法

public class IpCilentFilter extends ClientFilter {
    @Override
    public ClientResponse handle(ClientRequest clientRequest) throws ClientHandlerException {
        //响应对象的处理
        ClientResponse response = this.getNext().handle(clientRequest);
        return response;
    }
}

注入clientFilter

 @Bean
public DiscoveryClientOptionalArgs discoveryClientOptionalArgs() {
    DiscoveryClientOptionalArgs discoveryClientOptionalArgs = new DiscoveryClientOptionalArgs();
    discoveryClientOptionalArgs.setAdditionalFilters(Collections.singletonList(new IpCilentFilter()));
    return discoveryClientOptionalArgs;
}

自定义filter过滤

@Bean
public FilterRegistrationBean filterRegistrationBean() {
    FilterRegistrationBean registration = new FilterRegistrationBean(new ServerRequestAuthFilter());
    registration.addUrlPatterns("/*");
    return registration;
}

public class ServerRequestAuthFilter implements Filter {
    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain filterChain) throws IOException, ServletException {
        //业务实现，根据请求的IP或者参数判断是否可以执行注册或者访问
        filterChain.doFilter(request, response);
    }
}

拦截具体客户端注册、续约、下线请求，请参考
/eureka/apps

com.netflix.eureka.resources.ApplicationResource

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总结：

eureka:
  client:
    fetch-registry: true

1. 跟了下源码，第一种clientFilter只支持懒加载模式（版本1.6.2）
2. 自定义filter过滤比clientFilter 更加灵活，因为clientfilter不会限制在eureka-server上的任何东西