Spring Gateway基本使用示例小结

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

server:
  port: 9527
spring:
  application:
    name: gateway
  cloud:
    gateway:
      routes:
        # 路由的ID,没有固定规则但要求唯一,建议配合服务名
        - id: payment-routh1
          # 匹配后提供服务的路由地址
          uri: http://localhost:8001
          # 断言,路径相匹配的进行路由
          predicates:
            - Path=/payment/get/**
        - id: payment_routh2
          uri: http://localhost:8001
          predicates:
            - Path=/payment/query/**
eureka:
  instance:
    hostname: gateway-9527
  client:
    service-url:
      register-with-eureka: true
      fetch-registry: true
      defaultZone: http://127.0.0.1:7001/eureka

package com.yl.gateway.config;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
 * 路由配置
 *
 * @auther Y-wee
 */
@Configuration
public class GateWayConfig {
    /**
     * 配置一个id为service_route的路由:
     * 当访问地址http://localhost:9527/guonei时自动转发到地址:http://news.baidu.com/guonei
     * 当访问地址http://localhost:9527/guonji时自动转发到地址:http://news.baidu.com/guonji
     *
     * @param routeLocatorBuilder
     * @return
     */
    @Bean
    public RouteLocator customRouteLocator(RouteLocatorBuilder routeLocatorBuilder) {
        // 路由构建对象
        RouteLocatorBuilder.Builder routes = routeLocatorBuilder.routes();
        // 配置路由
        routes.route("service_route1",
                r -> r.path("/guonei")
                        .uri("http://news.baidu.com/guonei")).build();
        routes.route("service_route2",
                r -> r.path("/guoji")
                        .uri("http://news.baidu.com/guoji")).build();
        return routes.build();
    }
}

server:
  port: 9527
spring:
  application:
    name: gateway
  cloud:
    gateway:
      discovery:
        locator:
          # 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
          enabled: true
      routes:
        - id: payment-routh1
          # 匹配后提供服务的路由地址(lb相当于@LoadBalanced,PAYMENT是被调用的服务名)
          uri: lb://PAYMENT
          predicates:
            - Path=/payment/get/**
        - id: payment_routh2
          uri: lb://PAYMENT
          predicates:
            - Path=/payment/query/**
eureka:
  instance:
    hostname: gateway-9527
  client:
    service-url:
      register-with-eureka: true
      fetch-registry: true
      defaultZone: http://127.0.0.1:7001/eureka

package com.yl.gateway.filter;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
import java.util.Date;
/**
 * 自定义全局过滤器
 *
 * @auther Y-wee
 */
@Component
@Slf4j
public class MyLogGateWayFilter implements GlobalFilter, Ordered {
    /**
     * 自定义过滤逻辑
     *
     * @param exchange
     * @param chain
     * @return
     */
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("come in MyLogGateWayFilter:  " + new Date());
        String uname = exchange.getRequest().getQueryParams().getFirst("uname");
        if (uname == null) {
            log.info("用户名为null，非法用户，o(╥﹏╥)o");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }
        return chain.filter(exchange);
    }
    /**
     * 此过滤器的优先级顺序,数值越低优先级越高
     *
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }
}