GateWay网关

GateWay网关

添加pom依赖

 <!--gateway 注意不能添加WEB依赖-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<!--eureka client-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

配置yml文件

server:
  port: 9527

spring:
  application:
    name: cloud-gateway
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true #开启从注册中心动态创建路由的功能，利用微服务名进行路由
      routes:
        - id: payment_routh #payment_route    #路由的ID，没有固定规则但要求唯一，建议配合服务名
          #uri: http://localhost:8001          #匹配后提供服务的路由地址
          uri: lb://cloud-payment-service #匹配后提供服务的路由地址
          predicates:
            - Path=/payment/get/**         # 断言，路径相匹配的进行路由

        - id: payment_routh2 #payment_route    #路由的ID，没有固定规则但要求唯一，建议配合服务名
          #uri: http://localhost:8001          #匹配后提供服务的路由地址
          uri: lb://cloud-payment-service #匹配后提供服务的路由地址
          predicates:
            - Path=/payment/lb/**         # 断言，路径相匹配的进行路由
            #- After=2021-12-02T22:08:10.832+08:00[Asia/Shanghai]
            #- Before=2021-12-02T22:08:10.832+08:00[Asia/Shanghai]
            #- Between=2021-12-02T22:08:10.832+08:00[Asia/Shanghai],2021-12-02T23:08:10.832+08:00[Asia/Shanghai]
            #- Cookie=username,hancy #键值对
            #- Header=X-Request-Id, \d+  # 请求头要有X-Request-Id属性并且值为整数的正则表达式
            #- Host=**.hancy.com
            #- Method=GET
            #- Query=username, \d+

eureka:
  instance:
    hostname: cloud-gateway-service
  client: #服务提供者provider注册进eureka服务列表内
    service-url:
      register-with-eureka: true
      fetch-registry: true
      defaultZone: http://eureka7001.com:7001/eureka

主启动类

@SpringBootApplication
@EnableEurekaClient
public class GateWayMain9527 {
    public static void main(String[] args) {
        SpringApplication.run(GateWayMain9527.class,args);
    }
}

可选择配置类配置

@Configuration
public class GateWayConfig {
    @Bean
    public RouteLocator customRouteLocator(RouteLocatorBuilder routeLocatorBuilder){
        RouteLocatorBuilder.Builder routes = routeLocatorBuilder.routes();
        routes.route("path_routw_hancy",
                r -> r.path("/guonei")
                        .uri("http://news.baidu.com/guonei")
        ).build();

        return routes.build();
    }

    @Bean
    public RouteLocator customRouteLocator2(RouteLocatorBuilder routeLocatorBuilder){
        RouteLocatorBuilder.Builder routes = routeLocatorBuilder.routes();
        routes.route("path_routw_hancy2",
                r -> r.path("/guoji")
                        .uri("http://news.baidu.com/guoji")
        ).build();

        return routes.build();
    }
}

自定义过滤器

@Component
@Slf4j
public class MyLogGateWayFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("come in MyLogGateWayFilter");
        String username = exchange.getRequest().getQueryParams().getFirst("username");
        if(username == null){
            log.info("用户名为null");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
}