Spring Cloud Gateway 自定义过滤器 filter

- CheckAuth=lisi

server:
  port: 8060
spring:
  application:
    name: api-gateway
  cloud:
    # gateway的配置
    gateway:
      # 路由规则
      routes:
        - id: order_route # 路由的唯一标识， 路由到 order
          #          uri: http://localhost:8020 # 需要转发的地址
          uri: lb://order-nacos-service # 需要转发的地址  lb：使用nacos中的本地负载均衡策略
          # 断言规则 用于路由规则的匹配
          predicates:
            - Path=/order-serv/**
              # http://localhost:8060/order-serv/order/add 路由转到
            # http://localhost:8020/order-serv/order/add
#            - After=2017-01-20T17:42:47.789-07:00[Asia/Shanghai]
#            - Header=X-Request-Id,\d+
#            - Method=GET
#            - Query=name,zhangsan|lisi
#            - CheckAuth=lisi
          filters:
            - StripPrefix=1  # 转发之前去掉第一层路径
              # http://localhost:8020/order-serv/order/add 过虑成
            # http://localhost:8020/order/add
#            - AddRequestHeader=X-Request-color, blue
#            - AddRequestParameter=color, red
            - PrefixPath=/mall-order    #添加前缀， 对应微服务需要配置context-path
#            - RedirectTo=302, https://www.baidu.com/ #重定向到百度
#            - SetStatus=404
            - CheckAuth=lisi
    # 配置 Nacos
    nacos:
      server-addr: 127.0.0.1:8848
      discovery:
        #        server-addr: 127.0.0.1:8848
        username: nacos
        password: nacos
        namespace: public

package com.wsm.filters;

import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.factory.AbstractGatewayFilterFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;

@Component
public class CheckAuthGatewayFilterFactory extends AbstractGatewayFilterFactory {

    public CheckAuthGatewayFilterFactory(){
        super(CheckAuthGatewayFilterFactory.Config.class);
    }

    @Override
    public List shortcutFieldOrder() {
        return Arrays.asList("name");
    }

    @Override
    public GatewayFilter apply(CheckAuthGatewayFilterFactory.Config config) {
        return new GatewayFilter() {
            @Override
            public Mono filter(ServerWebExchange exchange, GatewayFilterChain chain) {
                //获取name参数
                String name = exchange.getRequest().getQueryParams().getFirst("name");
                System.out.println("============"+name);
                if(StringUtils.isNotBlank(name)){
                    if(config.getName().equals(name)){
                        return chain.filter(exchange);
                    }else{
                        //返回404
                        exchange.getResponse().setStatusCode(HttpStatus.NOT_FOUND);
                        return exchange.getResponse().setComplete();
                    }
                }
                //正常请求
                return chain.filter(exchange);
            }
        };
    }

    public static class Config {
        private String name;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }
    }


}