JWT - 微服务 网关校验

JWT - 微服务 网关校验

1.2 搭建gateway网关微服务

（1）创建heima-leadnews-admin-gateway微服务

pom文件

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-gateway</artifactId>
    </dependency>
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    </dependency>
    <dependency>
        <groupId>io.jsonwebtoken</groupId>
        <artifactId>jjwt</artifactId>
    </dependency>
</dependencies>

引导类：

package com.heima.admin.gateway;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient  //开启注册中心
public class GatewayApplication {

    public static void main(String[] args) {
        SpringApplication.run(GatewayApplication.class,args);
    }
}

application.yml

server:
  port: 6001
spring:
  application:
    name: leadnews-admin-gateway
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.200.130:8848
    gateway:
      globalcors:
        cors-configurations:
          '[/**]': # 匹配所有请求
            allowedOrigins: "*" #跨域处理 允许所有的域
            allowedMethods: # 支持的方法
            - GET
            - POST
            - PUT
            - DELETE
      routes:
      # 平台管理
      - id: admin
        uri: lb://leadnews-admin
        predicates:
        - Path=/admin/**
        filters:
        - StripPrefix= 1

配置含义：http://localhost:6001/admin/api/v1/channel/list -> http://localhost:9001/api/v1/channel/list

1.3 全局过滤器实现jwt校验

第一步，准备工具类

把heima-leadnews-utils模块中的AppJwtUtil类拷贝到网关模块下，如下图：

第二步，编写全局过滤器

package com.heima.admin.gateway.filter;

import com.heima.admin.gateway.utils.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.log4j.Log4j2;
import org.apache.commons.lang3.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
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;

@Component
@Log4j2
public class AuthorizeFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1.获取请求对象和响应对象
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        //2.判断当前的请求是否为登录，如果是，直接放行
        if(request.getURI().getPath().contains("/login/in")){
            //放行
            return chain.filter(exchange);
        }

        //3.获取当前用户的请求头jwt信息
        HttpHeaders headers = request.getHeaders();
        String jwtToken = headers.getFirst("token");

        //4.判断当前令牌是否存在
        if(StringUtils.isEmpty(jwtToken)){
            //如果不存在，向客户端返回错误提示信息
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        try {
            //5.如果令牌存在，解析jwt令牌，判断该令牌是否合法，如果不合法，则向客户端返回错误信息
            Claims claims = AppJwtUtil.getClaimsBody(jwtToken);
            int result = AppJwtUtil.verifyToken(claims);
            if(result == 0 || result == -1){
                //5.1 合法，则向header中重新设置userId
                Integer id = (Integer) claims.get("id");
                log.info("find userid:{} from uri:{}",id,request.getURI());
                //重新设置token到header中
                ServerHttpRequest serverHttpRequest = request.mutate().headers(httpHeaders -> {
                    httpHeaders.add("userId", id + "");
                }).build();
                exchange.mutate().request(serverHttpRequest).build();
            }
        }catch (Exception e){
            e.printStackTrace();
            //想客户端返回错误提示信息
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }


        //6.放行
        return chain.filter(exchange);
    }

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

测试：

启动admin服务，继续访问其他微服务，会提示需要认证才能访问，这个时候需要在heads中设置设置token才能正常访问。