Eureka：擴展ClientFilter實現服務註冊自定義過濾

Jersey clientFilter 過濾

eureka-wiki

POM依賴:

<dependency>
    <groupId>com.sun.jersey</groupId>
    <artifactId>jersey-client</artifactId>
    <version>1.19.1</version>
</dependency>

實現抽象類ClientFilter的handle方法

public class IpCilentFilter extends ClientFilter {
    @Override
    public ClientResponse handle(ClientRequest clientRequest) throws ClientHandlerException {
        //響應對象的處理
        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;
}

自定義filter過濾

@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 {
        //業務實現，根據請求的IP或者參數判斷是否能夠執行註冊或者訪問
        filterChain.doFilter(request, response);
    }
}

攔截具體客戶端註冊、續約、下線請求，請參考
/eureka/apps

com.netflix.eureka.resources.ApplicationResource

總結：

eureka:
  client:
    fetch-registry: true

1. 跟了下源碼，第一種clientFilter只支持懶加載模式（版本1.6.2）
2. 自定義filter過濾比clientFilter 更加靈活，由於clientfilter不會限制在eureka-server上的任何東西