const baseurl = "//xxx"
// 解析url参数并获取codefunction getUrlParam(name) {   //name为要获取的参数名var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");var rrr = decodeURIComponent(window.location.search);var r = rrr.substr(1).match(reg);if(r != null) return unescape(r[2]);return null;  }
// 请求微信服务器获取code 方法
function getUserCode() {redirectURL = encodeURI((baseurl + window.location.pathname + window.location.search).split('&code')[0]);//获取地址const base = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=';let state;let surl;let reserveUrl;let appid = "";let scope = "1";window.location.href =base + appid +'&redirect_uri='+ redirectURL +'&response_type=code&scope='+ scope +  '#wechat_redirect';
}// 路由变化时router.beforeEach((to, from, next) => {//读取sessionStorage的userlet user = JSON.parse(sessionStorage.getItem('user'));//这里可以在开发生产环境下 加测试用户信息存储到sessionStorageif(document.domain == "127.0.0.1"){//本地环境sessionStorage.setItem('user', JSON.stringify({uid     : 'eyJhbGciOiJIUzI1NiJ9.eyJ0IjoiNjY1NDA6MTU1NzQ0ODE2MiJ9.Dt4QHKq58GOdI_j8GhK0o3SkyWwHDlfeHR0nh1nEgsw',identity: 1}));store.commit('updateUser', {"uid":"eyJhbGciOiJIUzI1NiJ9.eyJ0IjoiNjY1NDA6MTU1NzQ0ODE2MiJ9.Dt4QHKq58GOdI_j8GhK0o3SkyWwHDlfeHR0nh1nEgsw","user_id":66540,"identity":1,"avatar":"http://chaofenxiang.vip/data/attachment/avatar/1904/28/ef0b7277767425348af3503e0759eacd.png","nickname":"小义","sex":"女","mobile":"15070026795"});//赋值本地存储}// 已登录 if (user) { next();//释放路由 如果已经登录 } // 未登录 且不是在测试环境下if (!user && document.domain != "127.0.0.1") {const code = getUrlParam('code');//获取url 上面的code// 还未完成微信授权if (!code) {//假如没codegetUserCode();//请求微信服务器获取code}// 已完成微信授权 假如已经获取到了codeif (code) {//使用code 去登录axios.get("/xxxx", {//params: {code: code,}}).then(res => {if (res.status == 200) {let userInfo = res.data.userInfo;sessionStorage.setItem('user', JSON.stringify(userInfo));// 存sessionStorage　　　　　　　　　　　　　　　　　　　　 next();} else {}}).catch(err => {//登录失败，请刷新重试}); }}else{next();}});//ps 代码放在main.js 里面仅供参考