微信登录接口

港控/mmm° 2024-03-26 15:20 25阅读 0赞

### 1.流程图 ###

![667d73db6d0c48c4b452f7921ad0eb86.png][]

本地认证服务需要：

*  定义接口，接受微信下发的授权码
 *  受到授权码以后，调用微信的接口申请令牌
 *  接受到令牌以后，申请获得用户的信息
 *  获取用户信息以后将信息存储到本地的数据库
 *  重定向到浏览器登录界面，自动登录

注意：由于微信属于外网服务，所以要添加穿透器。

### 2.定义接口 ###

#### 2.1定义controller ####

调用service去查询用户的信息

package com.xuecheng.auth.controller;
    
    import com.xuecheng.ucenter.model.po.XcUser;
    import com.xuecheng.ucenter.service.impl.WxAuthServiceImpl;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.PostMapping;
    
    /**
     * @author YCL
     * @version 1.0
     * @description 微信登录接口
     * @date 2023-02-28 7:54
     */
    @Slf4j
    @Controller
    public class WxLoginController {
    
        @Autowired
        WxAuthServiceImpl wxAuthService;
    
        @PostMapping("/wxLogin")
        public String wxLogin(String code, String state) {
            //拿授权码申请令牌。查询用户
            XcUser xcUser = wxAuthService.wxAuth(code);
            if(xcUser == null){
                //重定向到错误页面
                return "redirect:http://www.xuecheng-plus.com/error.html";
            }
            String username = xcUser.getName();
            return "redirect:http://www.xuecheng-plus.com/sign.html?username="+username+"&authType=wx";
        }
    }

#### 2.2定义service ####

1.拿着授权码去请求微信获取令牌

//请求微信获取令牌
        /**
         * 微信接口响应结果
         * {
         * "access_token":"ACCESS_TOKEN",
         * "expires_in":7200,
         * "refresh_token":"REFRESH_TOKEN",
         * "openid":"OPENID",
         * "scope":"SCOPE",
         * "unionid": "o6_bmasdasdsad6_2sgVt7hMZOPfL"
         * }
         */
    
        private Map<String, String> getAccss_token(String code){
            String appid = "appid";
            String serect = "serect";
            String url_template = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=%s&secret=%s&code=%s&grant_type=authorization_code";
            String url = String.format(url_template, appid, serect, code);
            //请求微信获取令牌
            ResponseEntity<String> exchange = restTemplate.exchange(url, HttpMethod.POST,
                    null, String.class);
            //得到相应串
            String body = exchange.getBody();
            Map map = JSON.parseObject(body, Map.class);
            return map;
        }

2.携带令牌去查询用户信息

//携带令牌查询用户信息
        //http请求方式: GET
        //https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID
        /**
         {
         "openid":"OPENID",
         "nickname":"NICKNAME",
         "sex":1,
         "province":"PROVINCE",
         "city":"CITY",
         "country":"COUNTRY",
         "headimgurl": "https://thirdwx.qlogo.cn/mmopen/g3MonUZtNHkdmzicIlibx6iaFqAc56vxLSUfpb6n5WKSYVY0ChQKkiaJSgQ1dZuTOgvLLrhJbERQQ4eMsv84eavHiaiceqxibJxCfHe/0",
         "privilege":[
         "PRIVILEGE1",
         "PRIVILEGE2"
         ],
         "unionid": " o6_bmasdasdsad6_2sgVt7hMZOPfL"
    
         }
         */
        private Map<String,String> getUserInfo(String access_token, String open_id){
            String url_template = "https://api.weixin.qq.com/sns/userinfo?access_token=%s&openid=%s";
            String url = String.format(url_template, access_token, open_id);
            ResponseEntity<String> exchange = restTemplate.exchange(url, HttpMethod.GET, null, String.class);
            String body = exchange.getBody();
            //结果转换成map
            Map map = JSON.parseObject(body, Map.class);
            return map;
    
        }

3. 写入数据，将数据写入到本地数据库中

@Transactional
        public XcUser addWxUser(Map userInfo_map){
            //先去除unionid
            String unionid = (String) userInfo_map.get("unionid");
            XcUser xcUser = xcUserMapper.selectOne(new LambdaQueryWrapper<XcUser>().
                    eq(XcUser::getWxUnionid, unionid));
            if (xcUser != null){
                return xcUser;
            }
    
            xcUser = new XcUser();
            String id = UUID.randomUUID().toString();
            xcUser.setId(id);
            xcUser.setWxUnionid(unionid);
            //记录从微信得到的昵称
            xcUser.setNickname(userInfo_map.get("nickname").toString());
            xcUser.setUserpic(userInfo_map.get("headimgurl").toString());
            xcUser.setName(userInfo_map.get("nickname").toString());
            xcUser.setUsername(unionid);
            xcUser.setPassword(unionid);
            xcUser.setUtype("101001");//学生类型
            xcUser.setStatus("1");//用户状态
            xcUser.setCreateTime(LocalDateTime.now());
            xcUserMapper.insert(xcUser);
            XcUserRole xcUserRole = new XcUserRole();
            xcUserRole.setId(UUID.randomUUID().toString());
            xcUserRole.setUserId(id);
            xcUserRole.setRoleId("17");//学生角色
            userRoleMapper.insert(xcUserRole);
            return xcUser;
        }

4.重写execute方法，查询本地数据库中的数据

/***
        * @description 微信认证方法
        * @param authParamsDto
        * @return
        * @author
        * @date
        */
        @Override
        public XcUserExt execute(AuthParamsDto authParamsDto) {
            String username = authParamsDto.getUsername();
            XcUser xcUser = xcUserMapper.selectOne(new LambdaQueryWrapper<XcUser>()
                    .eq(XcUser::getName, username
            ));
            if(xcUser == null){
                throw new RuntimeException("微信授权过程的用户不存在");
            }
            XcUserExt xcUserExt = new XcUserExt();
            BeanUtils.copyProperties(xcUser,xcUserExt);
            return xcUserExt;
        }

5.授权方法的调用函数

注意调用存储到本地数据库的代码的时候，由于数据库方法加了@Transactional，所以是事务，而调用函数本身并不是事务控制，所以要在service中注入自己为代理，防止事务失效，注入自己的代码如下：（关于事务的详细解释在spring专栏中）

@Autowired
        WxAuthServiceImpl agent;

public XcUser wxAuth(String code){
            //拿着授权码code申请令牌，查询用户
            Map<String, String> accss_token = getAccss_token(code);
            //拿着令牌查询用户信息
            String access_token = accss_token.get("access_token");
            String openid = accss_token.get("openid");
            Map<String, String> userInfo = getUserInfo(access_token, openid);
            //添加用户到数据库
            XcUser xcUser = agent.addWxUser(userInfo);
            return xcUser;
        }

#### 2.3 service完整代码 ####

package com.xuecheng.ucenter.service.impl;
    
    import com.alibaba.fastjson.JSON;
    import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
    import com.xuecheng.ucenter.mapper.XcUserMapper;
    import com.xuecheng.ucenter.mapper.XcUserRoleMapper;
    import com.xuecheng.ucenter.model.dto.AuthParamsDto;
    import com.xuecheng.ucenter.model.dto.XcUserExt;
    import com.xuecheng.ucenter.model.po.XcUser;
    import com.xuecheng.ucenter.model.po.XcUserRole;
    import com.xuecheng.ucenter.service.AuthService;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.beans.BeanUtils;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.http.HttpMethod;
    import org.springframework.http.ResponseEntity;
    import org.springframework.stereotype.Service;
    import org.springframework.transaction.annotation.Transactional;
    import org.springframework.web.client.RestTemplate;
    
    import java.time.LocalDateTime;
    import java.util.Map;
    import java.util.UUID;
    
    /**
     * @author YCL
     * @version 1.0
     * @description 微信登录认证
     * @date 2023-02-28 7:42
     */
    @Service("wx_authservice")
    @Slf4j
    public class WxAuthServiceImpl implements AuthService {
    
        @Autowired
        XcUserMapper xcUserMapper;
    
        @Autowired
        RestTemplate restTemplate;
    
        @Autowired
        XcUserRoleMapper userRoleMapper;
    
        @Autowired
        WxAuthServiceImpl agent;
    
        public XcUser wxAuth(String code){
            //拿着授权码code申请令牌，查询用户
            Map<String, String> accss_token = getAccss_token(code);
            //拿着令牌查询用户信息
            String access_token = accss_token.get("access_token");
            String openid = accss_token.get("openid");
            Map<String, String> userInfo = getUserInfo(access_token, openid);
            //添加用户到数据库
            XcUser xcUser = agent.addWxUser(userInfo);
            return xcUser;
        }
    
        /***
        * @description 微信认证方法
        * @param authParamsDto
        * @return
        * @author
        * @date
        */
        @Override
        public XcUserExt execute(AuthParamsDto authParamsDto) {
            String username = authParamsDto.getUsername();
            XcUser xcUser = xcUserMapper.selectOne(new LambdaQueryWrapper<XcUser>()
                    .eq(XcUser::getName, username
            ));
            if(xcUser == null){
                throw new RuntimeException("微信授权过程的用户不存在");
            }
            XcUserExt xcUserExt = new XcUserExt();
            BeanUtils.copyProperties(xcUser,xcUserExt);
            return xcUserExt;
        }
    
        //请求微信获取令牌
        /**
         * 微信接口响应结果
         * {
         * "access_token":"ACCESS_TOKEN",
         * "expires_in":7200,
         * "refresh_token":"REFRESH_TOKEN",
         * "openid":"OPENID",
         * "scope":"SCOPE",
         * "unionid": "o6_bmasdasdsad6_2sgVt7hMZOPfL"
         * }
         */
    
        private Map<String, String> getAccss_token(String code){
            String appid = "appid";
            String serect = "serect";
            String url_template = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=%s&secret=%s&code=%s&grant_type=authorization_code";
            String url = String.format(url_template, appid, serect, code);
            //请求微信获取令牌
            ResponseEntity<String> exchange = restTemplate.exchange(url, HttpMethod.POST,
                    null, String.class);
            //得到相应串
            String body = exchange.getBody();
            Map map = JSON.parseObject(body, Map.class);
            return map;
        }
    
        //携带令牌查询用户信息
        //http请求方式: GET
        //https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID
        /**
         {
         "openid":"OPENID",
         "nickname":"NICKNAME",
         "sex":1,
         "province":"PROVINCE",
         "city":"CITY",
         "country":"COUNTRY",
         "headimgurl": "https://thirdwx.qlogo.cn/mmopen/g3MonUZtNHkdmzicIlibx6iaFqAc56vxLSUfpb6n5WKSYVY0ChQKkiaJSgQ1dZuTOgvLLrhJbERQQ4eMsv84eavHiaiceqxibJxCfHe/0",
         "privilege":[
         "PRIVILEGE1",
         "PRIVILEGE2"
         ],
         "unionid": " o6_bmasdasdsad6_2sgVt7hMZOPfL"
    
         }
         */
        private Map<String,String> getUserInfo(String access_token, String open_id){
            String url_template = "https://api.weixin.qq.com/sns/userinfo?access_token=%s&openid=%s";
            String url = String.format(url_template, access_token, open_id);
            ResponseEntity<String> exchange = restTemplate.exchange(url, HttpMethod.GET, null, String.class);
            String body = exchange.getBody();
            //结果转换成map
            Map map = JSON.parseObject(body, Map.class);
            return map;
    
        }
    
        @Transactional
        public XcUser addWxUser(Map userInfo_map){
            //先去除unionid
            String unionid = (String) userInfo_map.get("unionid");
            XcUser xcUser = xcUserMapper.selectOne(new LambdaQueryWrapper<XcUser>().
                    eq(XcUser::getWxUnionid, unionid));
            if (xcUser != null){
                return xcUser;
            }
    
            xcUser = new XcUser();
            String id = UUID.randomUUID().toString();
            xcUser.setId(id);
            xcUser.setWxUnionid(unionid);
            //记录从微信得到的昵称
            xcUser.setNickname(userInfo_map.get("nickname").toString());
            xcUser.setUserpic(userInfo_map.get("headimgurl").toString());
            xcUser.setName(userInfo_map.get("nickname").toString());
            xcUser.setUsername(unionid);
            xcUser.setPassword(unionid);
            xcUser.setUtype("101001");//学生类型
            xcUser.setStatus("1");//用户状态
            xcUser.setCreateTime(LocalDateTime.now());
            xcUserMapper.insert(xcUser);
            XcUserRole xcUserRole = new XcUserRole();
            xcUserRole.setId(UUID.randomUUID().toString());
            xcUserRole.setUserId(id);
            xcUserRole.setRoleId("17");//学生角色
            userRoleMapper.insert(xcUserRole);
            return xcUser;
        }
    
    }

[667d73db6d0c48c4b452f7921ad0eb86.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/3af48146a18a40deb8597b69a1ebd3ba.png