Spring Cloud Feign统一设置验证token实现方法解析

static class DynamicAuthTokenTarget<T> implements Target<T> {
  public DynamicAuthTokenTarget(Class<T> clazz,
                 UrlAndTokenProvider provider,
                 ThreadLocal<String> requestIdProvider);
  ...
  @Override
  public Request apply(RequestTemplate input) {
   TokenIdAndPublicURL urlAndToken = provider.get();
   if (input.url().indexOf("http") != 0) {
    input.insert(0, urlAndToken.publicURL);
   }
   input.header("X-Auth-Token", urlAndToken.tokenId);
   input.header("X-Request-ID", requestIdProvider.get());
   return input.request();
  }
 }
 ...
 Bank bank = Feign.builder()
     .target(new DynamicAuthTokenTarget(Bank.class, provider, requestIdProvider));

@Configuration
public class FeignConfiguration {
  /**
   * 日志级别
   * @return
   */
  @Bean 
  Logger.Level feignLoggerLevel() { 
    return Logger.Level.FULL; 
  }
  /**
   * 创建Feign请求拦截器，在发送请求前设置认证的token,各个微服务将token设置到环境变量中来达到通用
   * @return
   */
  @Bean
  public FeignBasicAuthRequestInterceptor basicAuthRequestInterceptor() {
    return new FeignBasicAuthRequestInterceptor();
  }
}
/**
 * Feign请求拦截器
 * @author yinjihuan
 * @create 2017-11-10 17:25
 **/
public class FeignBasicAuthRequestInterceptor implements RequestInterceptor {
  public FeignBasicAuthRequestInterceptor() {
  }
  @Override
  public void apply(RequestTemplate template) {
    template.header("Authorization", System.getProperty("fangjia.auth.token"));
  }
}

/**
 * 定时刷新token
 *
 * @author yinjihuan
 * @create 2017-11-09 15:39
 **/
@Component
public class TokenScheduledTask {
  private static Logger logger = LoggerFactory.getLogger(TokenScheduledTask.class);
  public final static long ONE_Minute = 60 * 1000 * 60 * 20;
  @Autowired
  private AuthRemoteClient authRemoteClient;
  /**
   * 刷新Token
   */
  @Scheduled(fixedDelay = ONE_Minute)
  public void reloadApiToken() {
    String token = this.getToken();
    while (StringUtils.isBlank(token)) {
      try {
        Thread.sleep(1000);
        token = this.getToken();
      } catch (InterruptedException e) {
        logger.error("", e);
      }
    }
    System.setProperty("fangjia.auth.token", token);
  }
  public String getToken() {
    AuthQuery query = new AuthQuery();
    query.setAccessKey("1");
    query.setSecretKey("1");
    ResponseData response = authRemoteClient.auth(query);
    return response.getData() == null ? "" : response.getData().toString();
  }
}