2023-12-20 网关getway

作者: 大也 | 来源:发表于2024-01-14 16:43 被阅读0次

官方文档
https://docs.spring.io/spring-cloud-gateway/docs/current/reference/html/

1,pom
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
2,配置文件

server:
  port: 9527
spring:
  application:
    name: cloud-gateway
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

3,主启动类

image.png
4,针对pay模块,设置路由:
- 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: 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

5,开始测试

image.png

6,GateWay的网关配置,

 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 lb 负载均衡 CLOUD-PAYMENT-SERVICE
          predicates:
            - Path=/payment/get/**         # 断言，路径相匹配的进行路由

7使用硬编码配置GateWay:

@Configuration
public class GetWayConfig {
//    public Route.AsyncBuilder geturia(PredicateSpec r){
//        return r.path("/guoji").uri("http://news.baidu.com/guonei");
//    }
    @Bean
    public RouteLocator customRouteLocator(RouteLocatorBuilder routeLocatorBuilder) {
        RouteLocatorBuilder.Builder routes = routeLocatorBuilder.routes(); //https://news.baidu.com/guonei
        routes.route("path_route_atguigu", r -> r.path("/guoji").uri("https://news.baidu.com/guoji"))
                .build();
        return routes.build();
    }
}

8,然后重启服务即可

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=2020-03-08T10:59:34.102+08:00[Asia/Shanghai]
            #            - Before=2020-03-08T10:59:34.102+08:00[Asia/Shanghai]
            #            - Between=2020-03-08T10:59:34.102+08:00[Asia/Shanghai] ,  2020-03-08T10:59:34.102+08:00[Asia/Shanghai]
            #            curl http://localhost:9527/payment/lb --cookie "username=zzyy"
            #            - Cookie=username,zzyy   #Cookie=cookieName,正则表达式
            # 请求头要有X-Request-Id属性并且值为整数的正则表达式 curl http://localhost:9527/payment/lb --cookie "username=zzyy" -H "X-Request-Id:11"
#            - Header=X-Request-Id, \d+
#            - Host=**.atguigu.com  # curl http://localhost:9527/payment/lb -H "Host:afae.atguigu.com"

9.断言

predicates:
            - Path=/payment/lb/**         # 断言，路径相匹配的进行路由
#            - After=2020-03-08T10:59:34.102+08:00[Asia/Shanghai] #！！当前时间
#            - Before=2020-03-08T10:59:34.102+08:00[Asia/Shanghai]
#            - Between=2020-03-08T10:59:34.102+08:00[Asia/Shanghai] ,  2020-03-08T10:59:34.102+08:00[Asia/Shanghai]
#                Cookie
#                curl http://localhost:9527/payment/lb --cookie "username=zzyy"
#            - Cookie=username,zzyy   #Cookie=cookieName,正则表达式
#                请求头要有X-Request-Id属性并且值为整数的正则表达式
#                curl http://localhost:9527/payment/lb --cookie "username=zzyy" -H "X-Request-Id:11"
#            - Header=X-Request-Id, \d+ 请求头有X-Request-Id属性 且为正数
#                curl http://localhost:9527/payment/lb -H "Host:afae.atguigu.com"
#            - Host=**.atguigu.com
#                请求方式
#            - Method=GET,POST
#                路径
#            - Path=/red/{segment},/blue/{segment}
#                要有 username 且要是正数
#            - Query=username, \d+
#                远端地址
#            - RemoteAddr=192.168.1.1/24
#10。1 /11/12

10.过滤器

@Component
@Slf4j
public class MyLogGateWayFilter implements GlobalFilter, Ordered {

    /**
     *  代理过滤器 方法 GatewayFilterChain chain方法链对象 需要返回
     *  exchange 方法信息  链内信息
     * */
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("***********come in MyLogGateWayFilter:  " + new Date());

        // 获取请求参数中的 uname
        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);
    }

    /**
     * 加载过滤器顺序，数字越小优先级越高 implements Ordered
     *
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }
}

[ERROR] Failed to execute goal on project cloud-gateway-gateway9527: Could not resolve dependencies for project com.atguigu.springcloud:cloud-gateway-gateway9527:jar:1.0-SNAPSHOT: Failed to collect dependencies at com.atguigu.springcloud:cloud-api-commons:jar:1.0-SNAPSHOT: Failed to read artifact descriptor for com.atguigu.springcloud:cloud-api-commons:jar:1.0-SNAPSHOT: Could not find artifact com.atguigu.springcloud:cloud2020:pom:1.0-SNAPSHOT -> [Help 1]

https://blog.csdn.net/weixin_40731298/article/details/129644391
概念