The third-party login is based on the user on the third-party platform （ Such as WeChat ,QQ, Baidu ） Existing account to quickly complete the system login 、 register - Login and other functions .
Authentication of wechat
Take the authentication of wechat as an example ：
If your website has a scanning code login function , A QR code page provided by wechat will pop up , You need to scan the code with wechat on your mobile phone , Operate , You can log in . Such as this link ：
Um. . This is the quickest way to develop and use , It is also the code scanning login method used by most sites at present . But this depends on the function of wechat open platform , Wechat is the provider of authentication services , Have the obligation to supervise the websites of third parties （ Your website is a third party relative to wechat ）, So you need to have a business license for the enterprise or organization , Certified , Before you can apply for this function .（ It's said that you still need to pay for the certification ,OMG）
For individuals , This is clearly not a viable approach .
Then we still have two choices ：
1. Authentication of wechat official account ： Your web page is accessed in the wechat client , By jumping to the authentication link , An authentication page pops up , Login can be completed with one operation , Please read the official documents Web page authorization | Wechat open documents (qq.com)
This does not require certification , I think from the perspective of wechat , The browser control of wechat client is a function integrated in wechat , Have the ability to jump the control and authentication link from the legal domain name registered in the wechat background , But your website still needs to record and go https agreement
2. Wechat applet authentication ： This is similar to the authentication of wechat official account , The difference is the wechat applet SDK Provides login function , Applets don't need authentication , Available information , Please read the official documents wx.login(Object object) | Wechat open documents (qq.com)
Third party login process
First, the user confirms the authorization actively , The third-party platform will generate a login certificate , According to the third-party platform User credentials , Login credentials , return Conversation token With the user The unique account number of the third party Id, The token is used to obtain the account information of the third-party platform , For example, head portrait , nickname , Address , Phone number, etc , If the user is logging in for the first time , You can use these account information to create a system account .
Login credentials and tokens , All have timeliness
In wechat Authentication , The related concepts are ：
- Login credentials ：Code
- Conversation token ：SessionKey
- Unique account number Id：OpenId
- User credentials ：AppId、AppSecret
Think about how to implement your login logic ：
The login page of the official account , And wechat applets can be accessed by scanning the code . And then through our own back-end authentication service , Similar to the following process
- Click the wechat applet on the web page to log in , The web page generates a Token, call getwxacode() Interface , take scene Set to Token value ,page Set as applet authentication page , Generate applet code .
- Users use wechat client to scan code , Enter the applet authentication page , Get... From parameters scene（ Namely Token), And call the back-end interface , take Token As Key Record to the server Cache（Key/Value） in
- The user clicks "agree to log in" in the applet , call wx.login() obtain Code, And call the back-end interface , Will be Code The value is entered in Token by Key Of Value in
- At the same time, the web page is polling and invoking the query Cache Interface to the entry , Once you get Token Corresponding Code value , Indicates completion of authorization
- The web page calls the third-party login interface , take Code The value is passed to the back-end service as the login credential . Call the relevant wechat third-party login interface , In exchange for SessionKey,OpenId, recycling SessionKey Query related avatars , nickname , Address , Telephone and other information return
The user's operation path ：
After comparison and reflection , We use the authentication method of wechat applet with simpler calling method . Back end adoption .Net6 + Abp.Zero Quickly set up the user system , utilize Abp.Zero The integrated third-party login function can quickly realize wechat login . In order to save time, we need a ready-made wechat SDK library .
Next , Start project construction
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