1、新建wechatAuth.js文件
const queryString = require('query-string')
//应用授权作用域，snsapi_base （不弹出授权页面，直接跳转，只能获取用户openid），snsapi_userinfo （弹出授权页面，可通过openid拿到昵称、性别、所在地。并且，即使在未关注的情况下，只要用户授权，也能获取其信息）
const SCOPES = ['snsapi_base', 'snsapi_userinfo']
class VueWechatAuthPlugin {
install(Vue, options) {
let wechatAuth = this
this.setAppId(options.appid)
Vue.mixin({
created: function() {
this.$wechatAuth = wechatAuth
}
})
}
constructor() {
this.appid = null
this.redirect_uri = null
this.scope = SCOPES[1]
this._code = null
this._redirect_uri = null
}
static makeState() {
returnMath.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15)
}
setAppId(appid) {
this.appid = appid
}
set redirect_uri(redirect_uri) {
this._redirect_uri = encodeURIComponent(redirect_uri)
}
get redirect_uri() {
returnthis._redirect_uri
}
get state() {
returnlocalStorage.getItem("wechat_auth:state")
}
set state(state) {
localStorage.setItem("wechat_auth:state", state)
}
get authUrl() {
if(this.appid === null) {
throw"appid must not be null"
}
if(this.redirect_uri === null) {
throw"redirect uri must not be null"
}
this.state = VueWechatAuthPlugin.makeState()
return`https://open.weixin.qq.com/connect/oauth2/authorize?appid=${this.appid}&redirect_uri=${this.redirect_uri}&response_type=code&scope=${this.scope}&state=${this.state}#wechat_redirect`
}
returnFromWechat(redirect_uri) {
let parsedUrl = queryString.parse(redirect_uri.split('?')[1])
if(process.env.NODE_ENV === 'development') {
// console.log('parsedUrl: ', parsedUrl)
this.state = null
this._code = parsedUrl.code
} else{
if(this.state === null) {
throw"You did't set state"
}
if(parsedUrl.state === this.state) {
this.state = null
this._code = parsedUrl.code
} else{
this.state = null
throw`Wrong state: ${parsedUrl.state}`
}
}
}
get code() {
if(this._code === null) {
throw"Not get the code from wechat server!"
}
// console.log(this)
// console.log('this._code: ' + this._code)
let code = this._code
this._code = null
// console.log('code: ' + code)
returncode
}
}
const vueWechatAuthPlugin = newVueWechatAuthPlugin()
export defaultvueWechatAuthPlugin
2、main.js中导入
import wechatAuth from './plugins/wechatAuth'//微信登录插件
const queryString = require('query-string');
Vue.use(wechatAuth, {appid: XXXXXXXXX});
3、路由钩子中可以进行相关操作
router.beforeEach((to, from, next) => {
if(store.state.loginStatus == 0) {
//微信未授权登录跳转到授权登录页面
let url = window.location.href;
//解决重复登录url添加重复的code与state问题
let parseUrl = queryString.parse(url.split('?')[1]);
let loginUrl;
if(parseUrl.code && parseUrl.state) {
deleteparseUrl.code;
deleteparseUrl.state;
loginUrl = `${url.split('?')[0]}?${queryString.stringify(parseUrl)}`;
} else{
loginUrl = url;
}
wechatAuth.redirect_uri = loginUrl;
store.dispatch('setLoginStatus', 1);
window.location.href = wechatAuth.authUrl
} elseif(store.state.loginStatus == 1) {
try{
wechatAuth.returnFromWechat(to.fullPath);
} catch(err) {
store.dispatch('setLoginStatus', 0)
next()
}
store.dispatch('loginWechatAuth', wechatAuth.code).then((res) => {
if(res.status == 1) {
store.dispatch('setLoginStatus', 2)
} else{
store.dispatch('setLoginStatus', 0)
}
next()
}).catch((err) => {
next()
})
}else{
next()
}
});