SpringSpring CloudGateway

Spring Cloud - 6. Spring Cloud Gateway Global Filter 적용

Spring Cloud로 개발하는 마이크로서비스 애플리케이션 6 - Spring Cloud Gateway Global Filter 적용

LoggingFilter

@Component
@Slf4j
public class LoggingFilter extends AbstractGatewayFilterFactory<LoggingFilter.Config> {
    public LoggingFilter(){
        super(Config.class);
    }

    @Override
    public GatewayFilter apply(Config config) {
        GatewayFilter filter = new OrderedGatewayFilter((exchange, chain) -> {
            ServerHttpRequest request = exchange.getRequest();
            ServerHttpResponse response = exchange.getResponse();

            log.info("Logging Filter baseMessage : {}", request.getId());

            if(config.isPreLogger()){
                log.info("Logging Pre Filter: request id -> {}", request.getId());
            }
            // Custom Post Filter
            return chain.filter(exchange).then(Mono.fromRunnable(() -> {
                if(config.isPostLogger()){
                    log.info("Logging Post Filter: response code -> {}", response.getStatusCode());
                }
            }));
        }, Ordered.HIGHEST_PRECEDENCE);

        return filter;
    }

    @Data
    public static class Config{
        // Put the configuration properties
        private String baseMessage;
        private boolean preLogger;
        private boolean postLogger;
    }
}

application.yml

server:
  port: 8080

eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://localhost:8761/eureka

spring:
  application:
    name: apigateway-service
  cloud:
    gateway:
      default-filters:
        - name: GlobalFilter
          args:
            baseMessage: Spring Cloud Gateway Global  Filter
            preLogger: true
            postLogger: true

      routes:
        - id: first-service
          uri: http://localhost:8081/
          predicates:
            - Path=/first-service/**
          filters:
            - CustomFilter
#            - AddRequestHeader=first-request, first-request-header2
#            - AddResponseHeader=first-response, first-response-header2
        - id: second-service
          uri: http://localhost:8082/
          predicates:
            - Path=/second-service/**
          filters:
            - name: CustomFilter
            - name: LoggingFilter
              args:
                baseMessage: Hi, there.
                preLogger: true
                postLogger: true
#            - AddRequestHeader=second-request, second-request-header2
#            - AddResponseHeader=second-response, second-response-header2
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