Spring Cloud——Gateway

目录

pom

断言：配置方式

一、application.yml

二、配置类

过滤Filter

实现两个接口：

pom

        
            org.springframework.cloud
            spring-cloud-starter-gateway
        
        
            org.springframework.cloud
            spring-cloud-starter-netflix-eureka-client
        

断言：配置方式

一、application.yml

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 #路由id无固定规则，要求唯一
#          uri:  http://localhost:8001  #提供服务的路由地址
          uri: lb://cloud-payment-service #动态路由
          predicates:
            - Path=/payment/get/**  #断言，路径相匹配的进行路由
        - id: payment_routh2
#          uri:  http://localhost:8001
          uri: lb://cloud-payment-service
          predicates:
            - Path=/payment/lb/**
            - After=2022-05-19T15:34:01.420+08:00[Asia/Shanghai] #生效时间
#            - Before= 之前
#            - Between= 之间
#            - Cookie=username,ppp #是否带上cookie
#            - Header=X-Request-Id, d+  #请求头要有X-Request-Id并且值为正整数
#            - Method=Get 请求为get时候允许访问
#            - Host=**.test.com 需要带着 test.com
#            - Query=username, d+  需要携带username参数并且值为正数
eureka:
  instance:
    hostname: cloud-gateway-service
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      defaultZone: http://localhost:7001/eureka

二、配置类

@Configuration
public class GateWayConfig {
    @Bean
    public RouteLocator customerRouteLocator(RouteLocatorBuilder routeLocatorBuilder){
        RouteLocatorBuilder.Builder routes = routeLocatorBuilder.routes();
        routes.route("paths1",
                r->r.path("/guonei")
                        .uri("https://news.baidu.com/guonei")).build();
        return routes.build();
    }
}

过滤Filter

实现两个接口：

import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;

//自定义过滤器
@Component
@Slf4j
public class MyLogGatewayFilter implements GlobalFilter, Ordered {
    @Override
    public Mono filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("this is MyLogGatewayFilter" + new Date());
        //是否携带参数uname
        String uname = exchange.getRequest().getQueryParams().getFirst("uname");
        if (uname == null) {
            log.info("用户名为空");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        } else {
            return chain.filter(exchange);
        }
    }
    //加载过滤器的顺序，越小越高
    @Override
    public int getOrder() {
        return 0;
    }
}