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Firebase Auth和Vue路由器

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我正在尝试使用firebase验证Vue.js应用程序 .

我有一个问题，如果在登录时尝试直接访问受登录保护的URL，路由器将加载并检查auth状态，然后firebase.js有时间返回auth响应 . 这导致用户被退回到登录页面（当他们已经登录时） .

如何从firebase检索auth状态之前延迟vue-router导航？我可以看到firebase将auth数据存储在localStorage中，是否可以安全地检查它是否作为初步身份验证检查存在？理想情况下，最终结果是在用户通过身份验证时显示加载微调器或其他内容，然后他们应该能够访问他们导航到的页面 .

路由器/ index.js

let router = new Router({
  mode: 'history',
  routes: [
    {
      path: '/',
      name: 'Home',
      component: Home
    },
    {
      path: '/login',
      name: 'Login',
      component: Login
    },
    {
      path: '/example',
      name: 'Example',
      component: Example,
      beforeEnter: loginRequired
    }
})

function loginRequired (to, from, next) {
  if (authService.authenticated()) {
    next()
  } else {
    next('/login')
  }
}

auth.js

import * as firebase from 'firebase'

var config = {
    // firebase config
}

firebase.initializeApp(config)

var authService = {

  firebase: firebase,
  user: null,

  authenticated () {
    if (this.user == null) {
      return false
    } else {
      return !this.user.isAnonymous
    }
  },

  setUser (user) {
    this.user = user
  },

  login (email, password) {
    return this.firebase.auth().signInWithEmailAndPassword(email, password)
      .then(user => {
        this.setUser(user)
      })
  },

  logout () {
    this.firebase.auth().signOut().then(() => {
      console.log('logout done')
    })
  }
}

firebase.auth().onAuthStateChanged(user => {
  authService.setUser(user)
})

export default authService

app.vue

<template>
  <div id="app">
    <p v-if="auth.user !== null">Logged in with {{ auth.user.email }}</p>
    <p v-else>not logged in</p>
    <router-view v-if="auth.user !== null"></router-view>
  </div>
</template>

<script>
import authService from './auth'

export default {
  name: 'app',
  data () {
    return {
      auth: authService
    }
  }
}
</script>
firebase vue.js firebase-authentication

2 回答

  • 3

    Firebase始终在启动时触发身份验证状态更改事件，但不会立即触发 .

    您需要让 authService.authenticated 返回一个承诺，以便等待Firebase完成其用户/身份验证初始化 .

    const initializeAuth = new Promise(resolve => {
  // this adds a hook for the initial auth-change event
  firebase.auth().onAuthStateChanged(user => {
    authService.setUser(user)
    resolve(user)
  })
})

const authService = {

  user: null,

  authenticated () {
    return initializeAuth.then(user => {
      return user && !user.isAnonymous
    })
  },

  setUser (user) {
    this.user = user
  },

  login (email, password) {
    return firebase.auth().signInWithEmailAndPassword(email, password)
  },

  logout () {
    firebase.auth().signOut().then(() => {
      console.log('logout done')
    })
  }
}

    您不需要从 signInWith... 承诺调用 setUser ，因为这已经由 initializeAuth 承诺处理 .

    回复于
  • 2

    我刚刚遇到了同样的问题，最终延迟了Vue对象的创建，直到第一个onAuthStatedChanged .

    # main.js
// wait for first firebase auth change before setting up vue
import { AUTH_SUCCESS, AUTH_LOGOUT } from "@/store/actions/auth";
import { utils } from "@/store/modules/auth";
let app;
firebase.auth().onAuthStateChanged(async user => {
  if (!app) {
    if (user) {
      await store.dispatch(AUTH_SUCCESS, utils.mapUser(user));
    } else {
      await store.dispatch(AUTH_LOGOUT);
    }
    app = new Vue({
      router,
      store,
      i18n,
      render: h => h(App)
    }).$mount("#app");
  }
});

    然后在我的路线中，我检查正常，如果他们最终登录路线，我只需将它们推到我的概述页面，这是我的仪表板页面 .

    #router.js
router.beforeEach((to, from, next) => {
  let authenticated = store.getters.isAuthenticated;
  if (to.matched.some(record => record.meta.requiresAuth)) {
    // this route requires auth, check if logged in
    // if not, redirect to login page.
    if (!authenticated) {
      next({
        name: "Login",
        query: { redirect: to.fullPath }
      });
    } else {
      next();
    }
  } else {
    // doesn't require auth, but if authenticated already and hitting login then go to overview
    if (authenticated && to.name === "Login") {
      next({
        name: "Overview"
      });
    }
    next(); // make sure to always call next()!
  }
});
    回复于

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