uniApp develops a WeChat official account authorization and a solution for passing multiple parameters

I haven’t written a blog for a long time, haha, today I will share a problem and solution I encountered, and post the code directly:

ps: Because the code written before is in the online project, so I wrote this blog to use the external network mapping link to the local re-debugging code

auth.js authorization related logic

const port = {
	url: 'http://localhost:8086/triplh-api/',
}
export default {
	getUrlPrams(key) {
		var reg = new RegExp("(^|&)" + key + "=([^&]*)(&|$)", "i");
		var r = window.location.search.substr(1).match(reg); //获取url中"?"符后的字符串并正则匹配
		var context = "";
		if (r != null) {
			context = r[2];
		}
		return context;
	},
	//微信授权登录通用方法
	async init() {
		var that = this;
		//获取url中的参数
		var appId = this.getUrlPrams("appId");
		var test = this.getUrlPrams("test");
		//取出url中的参数
		var params = {};
		if (appId) {
			params.appId = appId;
		}
		if(test){
			params.test = test;
		}
		//将url中的参数存储到本地
		let time = new Date().getTime().toString();
		uni.setStorageSync(time, params);
		
		var code = this.getUrlPrams("code");
		if (code) {
			var state = this.getUrlPrams("state");
			params = uni.getStorageSync(state);
			console.log("打印参数",JSON.stringify(params));
			params.code=code;
			
			//使用code请求服务器接口，换取用户用户openID
			var [error, res] = await uni.request({
				url: `${port.url}wechat/gLogin`,
				data: params,
				method: 'POST'
			});
			return res;
		}
		let url_ = window.location.href.replace(/\?.*#/i, "#")
		var appid = 'wx2d9c964512e9a77f';
		window.location.href = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=' + appid +
			'&redirect_uri=' +
			encodeURIComponent(url_) + '&response_type=code&scope=snsapi_userinfo&state=' + time + '#wechat_redirect';
	}
}

main.js imports auth.js globally

import auth from '@/utils/auth.js';
Vue.prototype.$auth = auth

page call

<template>
	<view class="content">
		<image class="logo" src="/static/logo.png"></image>
		<view class="text-area">
			<text class="title">{
   
   {title}}</text>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				title: 'Hello'
			}
		},
		onLoad() {
			this.$auth.init().then(res => {
				console.log("用户信息返回",JSON.stringify(res))
			});
		},
		methods: {

		}
	}
</script>

<style>
	.content {
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
	}

	.logo {
		height: 200rpx;
		width: 200rpx;
		margin-top: 200rpx;
		margin-left: auto;
		margin-right: auto;
		margin-bottom: 50rpx;
	}

	.text-area {
		display: flex;
		justify-content: center;
	}

	.title {
		font-size: 36rpx;
		color: #8f8f94;
	}
</style>

ask:

http://***?appId=123456789&test=ABCDEFGHIJKLMN

View console print

Problem: Due to the limited length of the WeChat authorization state parameter, and the content can only be letters and numbers. What if I want to add other parameters?

solution:

1: Get the parameters in the URL

//获取url中的参数
var appId = this.getUrlPrams("appId");
var test = this.getUrlPrams("test");
//取出url中的参数
var params = {};
if (appId) {
	params.appId = appId;
}
if(test){
	params.test = test;
}

2: Save the parameter in the local key as the current timestamp, and the value is the parameter value

let time = new Date().getTime().toString();
uni.setStorageSync(time, params);

3: The authorization state parameter is equal to the timestamp (time)

let url_ = window.location.href.replace(/\?.*#/i, "#")
		var appid = 'wx2d9c964512e9a77f';
		window.location.href = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=' + appid +
			'&redirect_uri=' +
			encodeURIComponent(url_) + '&response_type=code&scope=snsapi_userinfo&state=' + time + '#wechat_redirect';

4: After the authorization is successful, the second value is taken out according to the state and is not saved to the amount

var state = this.getUrlPrams("state");
params = uni.getStorageSync(state);