JWT鉴权和令牌桶算法限流(用redis实现)

令牌桶算法限流

1.导入依赖

org.springframework.boot
spring-boot-starter-data-redis-reactive
2.1.3.RELEASE

2.在springboot的启动类中配置bean

    @Bean
    public KeyResolver ipKeyResolver(){
        return new KeyResolver() {
            @Override
            public Mono<String> resolve(ServerWebExchange exchange) {
                return Mono.just(exchange.getRequest().getRemoteAddress().getHostName());
            }
        };
    }

3.字application.yml配置文件中配置过滤限流
配置访问路劲跨域

spring:
  application:
    name: sysgateway
  cloud:
    gateway:
      globalcors:
        cors-configurations:
          '[/**]': #匹配所以请求
            allowedOrigins: "*"  #跨域请求,允许所有的域
            allowedMethods: #支持的方法
              - GET
              - POST
              - PUT
              - DELETE

配置令牌桶限流

spring:
  application:
    name: sysgateway
  cloud:
    gateway:
      routes: #路由规则
        - id: goods  #路由规则名称,可以自定义
          uri: lb://goods #负载均衡,直接写服务名
          predicates:
            - Path=/goods/**
          filters:
            - StripPrefix=1
            - name: RequestRateLimiter #请求数限流 名字不能随便写
              args:
                key-resolver: "#{@ipKeyResolver}" #ipKeyResolver必须与启动类中的bean的名称一致
                redis-rate-limiter.replenishRate: 1 #令牌桶每秒填充平均速率
                redis-rate-limiter.burstCapacity: 1 #令牌桶总容量

JWT鉴权
配置过滤器实现鉴权,生成一个令牌返回给客户端,下次访问的时候带着该令牌,再次进入该过滤器的时候就带着令牌来了然后放行,第一次进来需要登录直接放行

package com.changgou.system.filter;

import com.changgou.system.util.JwtUtil;
import io.jsonwebtoken.Jwt;
import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.net.URI;

@Component
public class AuthorizeFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //获取请求对象
        ServerHttpRequest request = exchange.getRequest();
        //获取相应对象
        ServerHttpResponse response = exchange.getResponse();
        //判断当前请求是否为登录请求,是,直接放行
        URI uri = request.getURI();
        if (uri.getPath().contains("/admin/login")){
            //登录直接放行
            return chain.filter(exchange);
        }
        //获取当期请求头信心
        HttpHeaders headers = request.getHeaders();
        //获取jwt令牌
        String JwtToken = headers.getFirst("token");
        //判断令牌是否存在
        if (StringUtils.isEmpty(JwtToken)){
            response.setStatusCode( HttpStatus.MULTI_STATUS);
            return response.setComplete();
        }
        //解析令牌,判断是否一致
        try{
            JwtUtil.parseJWT(JwtToken);
        }catch (Exception e){
            e.printStackTrace();
            //解析失败
            response.setStatusCode( HttpStatus.MULTI_STATUS);
            return response.setComplete();
        }
        return chain.filter(exchange);
    }

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