Unicloud cloud development obtains applet user openid

Catalog

One 、 Introduce openid

Two 、openid What is difficult to obtain

3、 ... and 、 Cloud development obtains openid

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One 、 Introduce openid

We all need to use... When distinguishing applet users openid, user openid It is equivalent to the user's ID card in the applet . As the unique identification of the user , So get the user openid It's very important , Today, let's teach you how to get the unique identifier of the user openid

Two 、openid What is difficult to obtain

Today I tried many methods on the Internet , It can still be obtained during real machine debugging , As a result, once you upload the code, you can't get it , There should be many students who have encountered this problem , therefore We should put code The value goes to the back end to get openid, Because in the front end it may be caught or crawled to your appid and secret, unsafe , If you put it on the back end to get openid, Unless your server is attacked , Or it's safe .

3、 ... and 、 Cloud development obtains openid

1. First of all we have uniCloud In the catalog cloudfunctions Right click to create cloud function

2. Write cloud functions

'use strict';  

exports.main = async (event, context) => {
	let appid = "wxc00000000000";// Your own appid
	let secret = "xxxxxxxxxxxxxxxxxxxxxxxx";// Your own appsecret
	let url =
	"https://api.weixin.qq.com/sns/jscode2session?appid=" +
	appid +
	"&secret=" +
	secret +
	"&js_code=" +
	event.code +
	"&grant_type=authorization_code";
	let res = await uniCloud.httpclient.request(
		url ,//  Request path ,
		{
			dataType:"json"
		}
	);
	let openid = res.data.openid
	return openid
};

  Notice the appid and secret Use your own

3. Client calls uni.login(), Use what you get code Call cloud function

uni.login({
    provider: "weixin",
    success: function (res) {
	    uniCloud.callFunction({
		    name: 'openid',
		    data: {
			    code: res.code
		    },
		    success: (res) => {
			    console.log(' The value returned by the cloud function ：：：：', res.result)	
		    },
		    fail: () => {
			    console.log(' Cloud function call failed ')
		    }
	    })
	},
});

4. Look at the output

 

Now we have successfully obtained the user's openid , It's too difficult to cross the river by feeling the stones , It's all blood and tears