博客

1.学习要点



2.编码实现

package com.atguigu.springcloud.filter;

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.Date;

/**
 *  自定义的网关全局过滤器，这里是举一个例子，师傅领进门，修行靠个人
 */

@Component
public class MyLogGatewayFilter implements GlobalFilter, Ordered
{

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain)
    {
        System.out.println("***********come in MyLogGatewayFilter: "+ new Date());

        String uname = exchange.getRequest().getQueryParams().getFirst("uname");

        if(uname == null)
        {
            System.out.println("用户名为null,非法用户.......");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }

        // 放行
        return chain.filter(exchange);
    }

    @Override
    public int getOrder()
    {
        // 返回值越小，优先级越高
        return 0;
    }

}

3.打开浏览器进行测试

输入：http://localhost:9527/payment/get/1

输出：


输入：http://localhost:9527/payment/get/1?uname=111

测试通过