0623~ holiday self study

Today, I mainly review the three aspects (VX) Sign in , Go through the previous process

Sort out the wechat login process

General carding :

1. Request from user , Redirect to wechat scanning page

2. return code  adopt code Exchange for token

3. adopt token In exchange for user information

4. Judge whether mobile phone binding is required according to user information

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1. Click wechat login on the front , Send a request back ;

2. The backend calls the authorization code obtained to verify , Redirect to wechat scanning page ;

//1. The front end sends a request to jump the path 
//2. The backend redirects to the wechat scanning page 
@GetMapping("/jump")
public String jump(){
    //authorization-code-url: "https://open.weixin.qq.com/connect/qrconnect?appid=%s&redirect_uri=%s&response_type=code&scope=snsapi_login&state=%s#wechat_redirect"
    String url = wechatProperties.getAuthorizationCodeUrl();
    String state=UUID.randomUUID().toString().replace("-","");
    url=String.format(url,wechatProperties.getAppId(),wechatProperties.getRedirectUri(),state);
    return "redirect:"+url;
}

3. The user will return after clicking authorization code And state Two figures ;

4. according to code Exchange for token Address ;

//2. adopt code Exchange for token
String tokenUrl = wechatProperties.getTokenUrl();
//https://api.weixin.qq.com/sns/oauth2/access_token?appid=%s&secret=%s&code=%s&grant_type=authorization_code
tokenUrl=String.format(tokenUrl,wechatProperties.getAppId(),wechatProperties.getAppSecrect(),code);
System.out.println(tokenUrl);

5. Exchange for token Address backward vx Send the request ; Return the user result set

// Get token Send a request to vx
String tokenresult = HttpUtil.sendPost(tokenUrl, null);
//2.1 Take what you get token Information    Convert to object 
WechartTokenDto wechartTokenDto = JSONObject.parseObject(tokenresult, WechartTokenDto.class);

6. use token In exchange for user information ;

//3. adopt token Get user information 
//https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID
String userinfoUrl = wechatProperties.getUserinfoUrl();
//https://api.weixin.qq.com/sns/userinfo?access_token=%s&openid=%s
userinfoUrl = String.format(userinfoUrl, wechartTokenDto.getAccess_token(), wechartTokenDto.getOpenid());
System.out.println(userinfoUrl);

7. Use the user information to vx Send a request , Return the result set of user information ;

String userinfo = HttpUtil.sendPost(userinfoUrl, null);
WechatUserInfoDto wechatUserInfoDto = JSONObject.parseObject(userinfo, WechatUserInfoDto.class);

8. use openid The unique ID determines whether the user logs in for the first time ;

9. First login , Then put the user information into storage first , Then jump to the binding mobile number page

//3.1 according to Openid Judge whether the user is logging in for the first time 
Example example = new Example(WechatUser.class);
example.and().andEqualTo("openid", wechatUserInfoDto.getOpenid());
WechatUser wechatUserInfo = wechatUserMapper.selectOneByExample(example);
if(wechatUserInfo==null) {
    WechatUser wechatUser = new WechatUser();
    //4. If openid It's empty   Description is the first login   Save the wechat scanning code login user into the database 
    wechatUser.setSex(wechatUserInfoDto.getSex());
    wechatUser.setUnionid(wechatUserInfoDto.getUnionid());
    wechatUser.setOpenid(wechatUserInfoDto.getOpenid());
    String nickname = wechatUserInfoDto.getNickname();
    try {
        String s = new String(nickname.getBytes("ISO-8859-1"), "utf-8");
    wechatUser.setNickname(s);
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    wechatUser.setHeadimgurl(wechatUserInfoDto.getHeadimgurl());
    wechatUser.setAddress(wechatUserInfoDto.getCity());
    wechatUserMapper.insert(wechatUser);
    String bindUrl = "http://127.0.0.1:9002/binder.html?id="+wechatUser.getId();
    return "redirect:"+bindUrl;

10. Not the first login , Judge the phone binding id Is it empty , If it is empty, you will also jump to the mobile phone binding page ;

}else{
    //5. If you come here, you have logged in before   Judge userId Is it empty   If it is empty, jump to the binding page 
   if(wechatUserInfo.getUserId()==null){
       String bindUrl = "http://127.0.0.1:9002/binder.html?id="+wechatUserInfo.getId();
       return "redirect:"+bindUrl;

11. It's not the first time to log in, but it's also bound to a mobile phone , Jump directly to the home page , Save the login information into redis;

} else{
    //6. I've logged in before , It also binds users , Jump directly to the home page 
    String indexUrl ="http://127.0.0.1:9002/index.html?wechatUserInfo=%s&token=%s";
    String token = UUID.randomUUID().toString();
    System.out.println("888888888888888888888888888888888888888888888888"+token);
    redisTemplate.opsForValue().set(token, JSONObject.toJSONString(wechatUserInfo), 30, TimeUnit.MINUTES);
    Map<Object, Object> map = new HashMap<>();
    map.put("token",token);
    map.put("wechatUserInfo",wechatUserInfo);
    indexUrl=String.format(indexUrl,wechatUserInfo,token);
    // After scanning the code and logging in successfully, return to the home page 
    return "redirect:"+indexUrl;
}

11. Save the login information into redis Back to the front end ;

Wechat binding steps

1. According to wechat users id Check whether the user's mobile phone has been bound ;

2. Not bound , Add a mobile number to bind , And bind the user id

3. Bound , Then bind the user directly id;

4. Login information is saved redis Back to the front end ;

 1. According to wechat users id Check whether the user's mobile phone has been bound ;

WechatUser wechatUser = wechatUserMapper.selectByPrimaryKey(wxBindDto.getWxbindid());
//4. First, compare the mobile number entered by the code scanning wechat user with the user information in the database 
  // If the mobile number exists, do   to vx User binding user id  operation 
  // If the mobile number does not exist    Then add a new user data 
Example example = new Example(LoginInfo.class);
example.and().andEqualTo("phone",wxBindDto.getPhone());
LoginInfo loginInfo = loginInfoMapper.selectOneByExample(example);

2. Not bound , Add a mobile number to bind , And bind the user id 

if(loginInfo==null){
    // If the mobile number does not exist    Then add a new user data 
    loginInfo = new LoginInfo();
    loginInfo.setPhone(wxBindDto.getPhone());
    loginInfo.setPassword("e10adc3949ba59abbe56e057f20f883e");
    loginInfoMapper.insert(loginInfo);
}

wechatUser.setUserId(loginInfo.getId());
wechatUserMapper.updateByPrimaryKey(wechatUser);

3. Bound , Then bind the user directly id;

 

wechatUser.setUserId(loginInfo.getId());
wechatUserMapper.updateByPrimaryKey(wechatUser);

4. Login information is saved redis Back to the front end ;

 

 //4. return token And user information to the front end 
Map<String, Object> map = new HashMap<>();
String token = UUID.randomUUID().toString();
 System.out.println(token+"1111111111111111111111111111111");
redisTemplate.opsForValue().set(token,JSONObject.toJSONString(wechatUser),30,TimeUnit.MINUTES);
 map.put("token",token);
 map.put("wechatUser",wechatUser);
 return JSONResult.success(map);