微服务网关的总结和实践

<!--Gateway网关-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <!-- Maven整个生命周期内排除内置容器，排除内置容器导出成war包可以让外部容器运行spring-boot项目-->
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<!--nacos服务发现依赖-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>

Parameter 0 of method modifyRequestBodyGatewayFilterFactory in org.springframework.cloud.gateway.config.GatewayAutoConfiguration required a bean of type 'org.springframework.http.codec.ServerCodecConfigurer' that could not be found.

server:
  port: 9010
spring:
  application:
    name: test-gateway
  cloud:
    nacos:
      discovery:
        server-addr: x.x.x.x:8848
        enabled: true
    gateway:
      routes: # 网关路由配置
        - id: my-test # 路由id，自定义，只要唯一即可
          # uri: http://127.0.0.1:8081 # 路由的目标地址 http就是固定地址
          uri: lb://my-test # 路由的目标地址 lb就是负载均衡，后面跟服务名称
          predicates: # 路由断言，也就是判断请求是否符合路由规则的条件
            - Path=/my-test/** # 这个是按照路径匹配，只要以/user/开头就符合要求

@Slf4j
@Component
public class MyFilter implements Ordered, GlobalFilter {
    /**
     * @param exchange 可以拿到对应的request和response
     * @param chain 过滤器链
     * @return 是否放行
     */
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        String name = exchange.getRequest().getQueryParams().get("name").get(0);
        log.info("用户：{} 开始进入系统", name);
        if (!StringUtils.isEmpty(name)) {
            if (name.equals("noName")) {
                log.info("用户没有访问权限");
                exchange.getResponse().setStatusCode(HttpStatus.PROXY_AUTHENTICATION_REQUIRED);
                return exchange.getResponse().setComplete();
            }
        }
        return chain.filter(exchange);
    }
    /**
     * 设定过滤器的优先级，值越小则优先级越高
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }
}