每天20分钟之spring-cloud-gateway基础五动态路由

spring-cloud-gateway动态路由

实现了spring-cloud的动态路由，一个真正可用的网关就成型了，从应用的角度来看，这就是spring-cloud的最后的一课了

动态路由其实不难实现 RouteDefinitionRepository 接口即可。

配置

代码语言：txt复制

spring:
  application:
    name: zuul-gateway-dynamic
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true
          lower-case-service-id: true
    consul:
      discovery:
        service-name: zuul-gateway-dynamic
        health-check-path: /health/status
        prefer-ip-address: true
        ip-address: 127.0.0.1
      host: localhost
      port: 8500
  redis:
    database: 0
    host: 127.0.0.1
    port: 6379
    connect-timeout: 100ms
    timeout: 500ms
    jedis:
      pool:
        max-active: 200
        min-idle: 10
        max-idle: 20
        max-wait: 10000ms

server:
  port: 10013
  address: 127.0.0.1
debug: true
management:
    endpoint:
      gateway:
        enabled: true
    endpoints:
      web:
        exposure:
          include: "*"
logging:
  config: classpath:logback-spring.xml

代码

代码语言：txt复制

package cn.beckbi.route;

import com.alibaba.fastjson2.JSON;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionRepository;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import java.util.ArrayList;
import java.util.List;

/**
 * @program: spring-cloud
 * @description:
 * @author: bikang
 * @create: 2022-08-22 07:47
 */
@Slf4j
@Component
public class RedisRouteDefinitionRepository implements RouteDefinitionRepository {

    private static final String GATEWAY_ROUTE = "SPRING_CLOUD_GATEWAY_ROUTE_LIST";

    @Autowired
    private StringRedisTemplate stringRedisTemplate;


    @Override
    public Flux<RouteDefinition> getRouteDefinitions() {
        List<RouteDefinition> routeDefinitionList = new ArrayList<>();
        stringRedisTemplate.opsForHash().values(GATEWAY_ROUTE).forEach(route -> {
            routeDefinitionList.add(JSON.parseObject(route.toString(), RouteDefinition.class));
        });
        return Flux.fromIterable(routeDefinitionList);
    }

    @Override
    public Mono<Void> save(Mono<RouteDefinition> route) {
        return route.flatMap(routeDefinition -> {
            stringRedisTemplate.opsForHash().put(GATEWAY_ROUTE, routeDefinition.getId(), JSON.toJSONString(routeDefinition));
            return Mono.empty();
        });
    }

    @Override
    public Mono<Void> delete(Mono<String> routeId) {
        return routeId.flatMap(id->{
            if(stringRedisTemplate.opsForHash().hasKey(GATEWAY_ROUTE, id)){
                stringRedisTemplate.opsForHash().delete(GATEWAY_ROUTE, id);
                return Mono.empty();
            }else {
                return Mono.defer(() -> Mono.error(new Exception("routeDefinition not found:"   routeId)));
            }
        });
    }
}

动态增加路由

代码语言：txt复制

curl --location --request POST 'http://localhost:10013/actuator/gateway/routes/test1' 
--header 'Content-Type: application/json' 
--data-raw '{"uri":"http://www.example.com/","predicates":[{"name":"Path","args":{"pattern":"/abc/**"}}],"filters":[{"name":"StripPrefix","args":{"value":1}}],"order":0}'

spring springboot springcloud API网关java spring-cloud gateway spring-boot

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