搭建leadnews-admin网关、完成登录功能

一、网关搭建

（1）如果是登录请求则放行/login

（2）其它请求则获取token判断是否存在、是否过期

（3）token不存在或者过期则返回未授权结果。未过期则从token中获取用户信息存入header然后放行

package com.heima.admin.gateway.filter;

import com.heima.admin.gateway.util.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
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.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
@Slf4j
public class AuthorizeFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1、获取request和response对象
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();

        //2、判断是否是登录
        if(request.getURI().getPath().contains("/login")){
            //放行
            return chain.filter(exchange);
        }
        //3、获取token
        String token = request.getHeaders().getFirst("token");
        //4、判断token是否存在
        if(StringUtils.isBlank(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        //5、判断token是否有效
        try {
            Claims claimsBody = AppJwtUtil.getClaimsBody(token);
            //是否过期
            int result = AppJwtUtil.verifyToken(claimsBody);
            if(result == 1 || result == 2){
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }
            //获取用户信息
            Object userId = claimsBody.get("id");

            //存入header
            ServerHttpRequest serverHttpRequest = request.mutate().headers(httpHeaders -> {
                httpHeaders.add("userId", userId + "");
            }).build();
            //重置请求
            exchange.mutate().request(serverHttpRequest);

        }catch (Exception e){
            //解析失败
            e.printStackTrace();
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

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

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

二、登录

（1）参数验证

（2）通过name查询用户

（3）用户存在，则将用户的salt与提交的password组合成密码与查询到的用户的密码比对：相等就放行，不等则返回error提示信息

package com.heima.admin.service.impl;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.admin.mapper.AdUserMapper;
import com.heima.admin.service.AdUserService;
import com.heima.model.admin.dtos.AdUserDto;
import com.heima.model.admin.pojos.AdUser;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.utils.common.AppJwtUtil;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import sun.security.provider.MD5;

import java.util.HashMap;
import java.util.Map;

@Service
public class AdUserServiceImpl extends ServiceImpl<AdUserMapper, AdUser> implements AdUserService {
    /**
     * admin管理员登录
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult login(AdUserDto dto) {
        //参数验证
        if(dto == null || StringUtils.isBlank(dto.getName()) || StringUtils.isBlank(dto.getPassword())){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //通过name查询用户
        AdUser adUser = getOne(Wrappers.<AdUser>lambdaQuery().eq(AdUser::getName, dto.getName()));
        if(adUser == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST, "用户名或密码有误");
        }

        String salt = adUser.getSalt();
        String pswd = dto.getPassword();
        pswd = DigestUtils.md5DigestAsHex((pswd + salt).getBytes());

        if(!pswd.equals(adUser.getPassword())){
            //密码不正确
            return ResponseResult.errorResult(AppHttpCodeEnum.LOGIN_PASSWORD_ERROR);
        }else{
            //密码正确,返回数据token和user
            String token = AppJwtUtil.getToken(adUser.getId().longValue());
            Map<String, Object> map = new HashMap<>();
            map.put("token", token);
            adUser.setSalt("");
            adUser.setPassword("");
            map.put("user", adUser);
            return ResponseResult.okResult(map);

        }

    }

}