vue2.x 微信公众号授权拿取code,静默登录

1.前提是微信公众号后台已经配置了 业务域名地址和网络授权地址

2.例如在首页授权登录，在当前页面引入对应的js

import { isWXBrowser, getWechatCode } from "@/utils/common";

3.common.js

// 判断是否微信环境

export const isWXBrowser = (() => {

const ua = window.navigator.userAgent.toLowerCase()

return /(micromessenger|webbrowser)/g.test(ua)

})()


import axios from 'axios'
// 判断是否为微信环境
const isWechat = () => {
  return String(navigator.userAgent.toLowerCase().match(/MicroMessenger/i)) === "micromessenger";
}
export const getUrlCode = () => {
  // 截取url中的code方法
  var url = location.search;
  var theRequest = new Object();
  if (url.indexOf("?") != -1) {
    var str = url.substr(1);
    var strs = str.split("&");
    for (var i = 0; i < strs.length; i++) {
      theRequest[strs[i].split("=")[0]] = strs[i].split("=")[1];
    }
  }
  return theRequest;
}
export const getWechatCode = () => {
    if (isWechat) {
      let appid = "微信APPid "; //微信APPid
      let code = getUrlCode().code; //是否存在code
      let local = window.location.href;
      // let local = 'https://********';
      if (code == null || code === "") {
        //不存在就打开上面的地址进行授权
        window.location.href =
          "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" +
          appid +
          "&redirect_uri=" +
          encodeURIComponent(local) +
          "&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect";
      } else {
		    localStorage.code = code 
        // 拿到code之后就要范湖给后台 让后台返回对应的account_token和openid,尽量使用account_token 这个的刷新时间是两个小时，openid暴露出来不太好,拿到token之后就处理相关的业务逻辑
      }
    }
//   })
};

4.使用

 created() {
    if (isWXBrowser) {
      getWechatCode();
    } 
   
  },