Gateway自定义过滤器 记录

用代码配置的话要注意顺序！！！！！！！！！！

 

今晚倒腾了一晚上的Gateway过滤器

记录一下代码，下次好对比

package com.example.gatewaytest;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @author tyf
 * 2022/7/10
 */
@Slf4j
@Component
public class CustomGatewayFilter implements GatewayFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        System.out.println("前置过滤器");
        return chain.filter(exchange).then(Mono.fromRunnable(()->{
            System.out.println("后置过滤器");
        }));
    }

    @Override
    public int getOrder() {
        return 0;
    }
}

@Bean
    public RouteLocator customRouteLocator(RouteLocatorBuilder builder) {
        return builder.routes()
                .route("path_route", r -> r.path("/get")
                        .uri("http://httpbin.org").filters(customGatewayFilter))
                .build();
    }

server:
  port: 81
spring:
  cloud:
    nacos:
      username: nacos
      password: nacos
#    gateway:
#      routes:
#        - id: testid
#          uri: lb://user-service
#          predicates:
#            - Path=/**
#          filters:
#            - AddRequestHeader=kkk,vvv
#      discovery:
#        locator:
#          enabled: true
#          lower-case-service-id: true
#      default-filters:
#        - AddRequestHeader=kkk,vvv
#        - Jiaoyan=chao,f
  application:
    name: gateway

@Component
public class JiaoyanGatewayFilterFactory extends AbstractNameValueGatewayFilterFactory{
    @Override
    public GatewayFilter apply(NameValueConfig config) {
        System.out.println("name:"+config.getName());
        System.out.println("value:"+config.getValue());
        return new GatewayFilter() {
            @Override
            public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
                return chain.filter(exchange);
            }
        };
    }
}

继承AbstractNameValueGatewayFilterFactory类和直接实现GatewayFilter接口有什么区别？

继承AbstractNameValueGatewayFilterFactory类主要是用于配置文件中添加过滤器，而GatewayFilter主要用于在java代码中使用filter方法添加过滤器