Roman Paprotsky

Posted on Mar 23, 2020 • Updated on Jun 24, 2020

Building Vue.js Client SPA Token-Based Authentication with Laravel Sanctum

#vue #laravel #sanctum #auth

Authentication systems are a vital part of most modern applications, and should thus be appropriately implemented.

In this article, you will learn how to build an authentication system using Vue.js and Laravel Sanctum (former Airlock).

We are going to create separate projects for the front end, and for the back end, that will interact with one another through a REST API.

Let's dive in!

Back end (Laravel)

Step #1

For Laravel installation instructions, visit an Official Documentation page.

Create a new Laravel project by running in the terminal

laravel new my-app

composer create-project --prefer-dist laravel/laravel my-app

I'm using Laravel Valet, which automatically allows us to access our site at the http://my-app.test domain.

On your machine, it will be accessible according to your local development environmental settings.

Step #2

Create a new database called my-app and set DB_DATABASE=my-app in .env file in your app's directory.

Step #3

Install Laravel Sanctum.

composer require laravel/sanctum

Publish the Sanctum configuration and migration files using the vendor:publish Artisan command. The sanctum configuration file will be placed in your config directory:

php artisan vendor:publish --provider="Laravel\Sanctum\SanctumServiceProvider"

Run your database migrations to create a database table in which to store API tokens:

php artisan migrate

Add the Sanctum's middleware to your api middleware group within your app/Http/Kernel.php

../app/Http/Kernel.php

use Laravel\Sanctum\Http\Middleware\EnsureFrontendRequestsAreStateful;

...

    protected $middlewareGroups = [
        ...

        'api' => [
            EnsureFrontendRequestsAreStateful::class,
            'throttle:60,1',
            \Illuminate\Routing\Middleware\SubstituteBindings::class,
        ],
    ];

    ...
],

Step #4

To use tokens for users, we have to add HasApiTokens to the User model in app/User.php.

../app/User.php

use Laravel\Sanctum\HasApiTokens;

class User extends Authenticatable
{
    use HasApiTokens, Notifiable;
}

Step #5

Let's create the seeder for the User model. We'll need that a bit later to test the login proccess.

php artisan make:seeder UsersTableSeeder

Now let's insert

DB::table('users')->insert([
    'name' => 'John Doe',
    'email' => 'john@doe.com',
    'password' => Hash::make('password')
]);

into the run() function in database/seeds/UsersTableSeeder.php

To seed users table with user, let's run:

php artisan db:seed --class=UsersTableSeeder

So now we have a new user in our database called John Doe with email john@doe.com and password password.

Step #6

Let's create a /login route in the routes/api.php file:

../routes/api.php

use App\User;
use Illuminate\Support\Facades\Hash;

Route::post('/login', function (Request $request) {
    $data = $request->validate([
        'email' => 'required|email',
        'password' => 'required'
    ]);

    $user = User::where('email', $request->email)->first();

    if (!$user || !Hash::check($request->password, $user->password)) {
        return response([
            'message' => ['These credentials do not match our records.']
        ], 404);
    }

    $token = $user->createToken('my-app-token')->plainTextToken;

    $response = [
        'user' => $user,
        'token' => $token
    ];

    return response($response, 201);
});

Step #7

Let's send a POST request with email john@doe.com and password password as parameters to the http://my-app.test/api/login route. You can use the Postman or Insomnia software packages to accomplish this.

If everything is working well, we will receive a JSON object as response to our request:

{
    "user": {
        "id": 1,
        "name": "John Doe",
        "email": "john@doe.com",
        "email_verified_at": null,
        "created_at": null,
        "updated_at": null
    },
    "token": "AbQzDgXa..."
}

Step #8

Next, we need to change some middleware. We do this in the /routes/api.php file by replacing auth:api with auth:sanctum:

../routes/api.php

Route::middleware('auth:sanctum')->get('/user', function (Request $request) {
    return $request->user();
});

Step #9

Before we continue to the front end, we have to setup cross-origin requests CORS handling.

../config/cors.php

    'paths' => ['api/*', 'login', 'logout'],

    'allowed_methods' => ['*'],

    'allowed_origins' => ['*'],

    'allowed_origins_patterns' => [],

    'allowed_headers' => ['*'],

    'exposed_headers' => [],

    'max_age' => 0,

    'supports_credentials' => true,

../.env

SANCTUM_STATEFUL_DOMAINS=127.0.0.1

Front end (Vue.js)

We'll use Vuex for state management, Vue Router for routing and axios to make HTTP requests.

Step #1

We are going to use Vue CLI to create a new Vue project. If you are not familiar with this standard tooling for Vue.js development, please, read this guide.

In the directory we are using for our projects, let's run the following command:

vue create my-vue-app

Choose to Manually select features and then opt for Router and Vuex

After successfully creating the my-vue-app project, run the following commands:

cd my-vue-app
npm run serve

Now our app should be available at the http://localhost:8080/ domain.

Step #2

Let's create a new file for a Login view.

..src/views/Login.vue

<template>
  <div>
    <h1>Login</h1>
    <form @submit.prevent="login">
      <input type="email" name="email" v-model="email">
      <input type="password" name="password" v-model="password">
      <button type="submit">Login</button>
    </form>
  </div>
</template>

<script>
export default {
  data () {
    return {
      email: '',
      password: ''
    }
  },

  methods: {
    login () {
      this.$store
        .dispatch('login', {
          email: this.email,
          password: this.password
        })
        .then(() => {
          this.$router.push({ name: 'About' })
        })
        .catch(err => {
          console.log(err)
        })
    }
  }
}
</script>

In the Vue Router, we have to implement a route for the Login view.

../src/router/index.js

import Vue from 'vue'
import VueRouter from 'vue-router'
import Home from '../views/Home.vue'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    name: 'Home',
    component: Home
  },
  {
    path: '/about',
    name: 'About',
    // route level code-splitting
    // this generates a separate chunk (about.[hash].js) for this route
    // which is lazy-loaded when the route is visited.
    component: () => import(/* webpackChunkName: "about" */ '../views/About.vue')
  },
  {
    path: '/login',
    name: 'Login',
    component: () => import(/* webpackChunkName: "login" */ '../views/Login.vue')
  }
]

const router = new VueRouter({
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})

export default router

Now, if we navigate to http://localhost:8080/login in a browser, we can see a login page.

Step #3

We have to install axios in our frontend directory to make HTTP requests:

npm install axios

Step #4

Let's implement some user authentication actions (login/logout) in Vuex.

../src/store/index.js

import Vue from 'vue'
import Vuex from 'vuex'
import axios from 'axios'

Vue.use(Vuex)

axios.defaults.baseURL = 'http://app-backend.test/api'

export default new Vuex.Store({
  state: {
    user: null
  },

  mutations: {
    setUserData (state, userData) {
      state.user = userData
      localStorage.setItem('user', JSON.stringify(userData))
      axios.defaults.headers.common.Authorization = `Bearer ${userData.token}`
    },

    clearUserData () {
      localStorage.removeItem('user')
      location.reload()
    }
  },

  actions: {
    login ({ commit }, credentials) {
      return axios
        .post('/login', credentials)
        .then(({ data }) => {
          commit('setUserData', data)
        })
    },

    logout ({ commit }) {
      commit('clearUserData')
    }
  },

  getters : {
    isLogged: state => !!state.user
  }
})

After successfully logging in, we are going to store some user data in the user variable and the localStorage.

Step #5

Let's define routes for authenticated and unauthenticated pages.

We can make an About page accessible for authenticated users only.

For this purpose let's add the meta field to the About route.

Let's use Vue Router's beforeEach method to check if the user is logged in. If the user is not authenticated, we'll redirect them back to the login page.

../src/router.index.js

import Vue from 'vue'
import VueRouter from 'vue-router'
import Home from '../views/Home.vue'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    name: 'Home',
    component: Home
  },
  {
    path: '/about',
    name: 'About',
    meta: {
      auth: true
    },
    component: () => import(/* webpackChunkName: "about" */ '../views/About.vue')
  },
  {
    path: '/login',
    name: 'Login',
    component: () => import(/* webpackChunkName: "login" */ '../views/Login.vue')
  }
]

const router = new VueRouter({
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})

router.beforeEach((to, from, next) => {
  const loggedIn = localStorage.getItem('user')

  if (to.matched.some(record => record.meta.auth) && !loggedIn) {
    next('/login')
    return
  }
  next()
})

export default router

Step #6

What if the user refreshes a page? Should we ask him to log in again?

Of course not!

Let's add a created() method to the Vue instance to handle that scenario.

created () {
  const userInfo = localStorage.getItem('user')
  if (userInfo) {
    const userData = JSON.parse(userInfo)
    this.$store.commit('setUserData', userData)
  }
}

Step #7

We also need to handle cases when a token is expired or if the user is unauthorized.

Let's do that in the created() method by using interceptors.

So our updated main.js file looks like this:

../src/main.js

import Vue from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'

Vue.config.productionTip = false

new Vue({
  router,
  store,
  created () {
    const userInfo = localStorage.getItem('user')
    if (userInfo) {
      const userData = JSON.parse(userInfo)
      this.$store.commit('setUserData', userData)
    }
    axios.interceptors.response.use(
      response => response,
      error => {
        if (error.response.status === 401) {
          this.$store.dispatch('logout')
        }
        return Promise.reject(error)
      }
    )
  },
  render: h => h(App)
}).$mount('#app')

Step #8

We haven't implemented a Logout feature yet. Let's do that in the App.vue file.

Also, let's show the About and Logout buttons only when a user is logged in.

../src/App.vue

<template>
  <div id="app">
    <div id="nav">
      <router-link to="/">Home</router-link> |
      <router-link to="/about" v-if="isLogged">About</router-link>
      <router-link to="/login" v-else>Login</router-link>
      <button type="button" @click="logout()" v-if="isLogged">
        Logout
      </button>
    </div>
    <router-view/>
  </div>
</template>

<script>
import { mapGetters } from 'vuex'

export default {
  computed: {
    ...mapGetters([
      'isLogged'
    ])
  },

  methods: {
    logout () {
      this.$store.dispatch('logout')
    }
  }
}
</script>

Ok, our tutorial is done.

I hope you found this info helpful!

View source code
Front End
Back End

Top comments (43)

Derek Bliss • May 22 '20

Great Article! I am having an issue with CORs. Everything works great locally but when I upload my backend to api.example.com and my frontend to example.com I get this issue.

Access to XMLHttpRequest at 'api.example.com/api/banlist/fetch' from origin 'example.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Roman Paprotsky • May 23 '20

Have you tried to add SANCTUM_STATEFUL_DOMAINS=127.0.0.1 to .env file on the server?

Derek Bliss • May 23 '20

Yes this is set in the .env file.

Derek Bliss • May 24 '20

It is set but still same error. Could it be because the API and frontend are in different directories? I have tried just about everything and I am still getting the same error. I am almost to the point of moving the frontend into Laravel.

Roman Paprotsky • May 24 '20 • Edited

Have you set baseURL and headers in main.js?

Vue.prototype.$http = axios
Vue.prototype.$http.defaults.baseURL = 'https://example.com/api'
Vue.prototype.$http.defaults.headers.post['Content-Type'] = 'application/json'

Derek Bliss • May 24 '20

Just tried this and same error.

Roman Paprotsky • May 24 '20

Could you share your repositories? I could have a look tomorrow. My email address is roman@paprotsky.com

Derek Bliss • May 24 '20

Cool thank you. I sent you an email.

Thank you!

Eugene van der Merwe • Jun 29 '20

Hi @derek how was this problem solved?

Enmanuel Rojas • Jul 25 '20

hi, did you manage to solve the problem?

morris14 • Jun 24 '20 • Edited

Great post! I noticed you store the token in localstorage, is this safe? I always thought this was an insecure way of storing sensitive data seeing as the token is more or less the users username/password combo?

OneGeco • Nov 6 '20

Hi @moris14 it's really wrong storing sensitive data in LocalStorage meanwhile i haven't seen any article on a better way to go about this, please share if you have any.

gweinxx • May 1 '21 • Edited

(Based on my app)

U can verify token owner by comparing ip address, browser: version, device, custom cookies, etc

You need to track users here
Token hasOne Login (Ip address, device platform, browser name, browser version, etc)
If you still need to verify the user, add password verification feature, for worse scenarios like:
Token is not being used for (x) days
Tracker result doesn't match token login's information (#2)
Token exist, but custom cookies is expired / missing

With this feature, personally I can offer the user to see, what devices are they are logged in, logout from specific device / all devices, etc

If anyone got better idea, I would like to know and learn :D

Note: sorry for bad english

Dominique • Jul 21 '20

Thanks for this tutorial. I had tried to do the same with React. And I had never managed to do it. VueJs is much simpler!

A little evolution please. Imagine an 'about2' route. If I try to access it without being logged in, the app sends me back to the login page. Perfect ! But then, how can I be redirected automatically to 'about2' and not to 'about'? I guess I must store the target route name in the store but after ?

thanks again for this tutorial.

Roman Paprotsky • Jul 25 '20

Hi Dominique,

I guess it definitely make sense to store the target route name in the store and check it out in the login() method in the ..src/views/Login.vue view before this.$router.push({ name: 'About' })

Roman Paprotsky • Sep 24 '20

This Vue Screencasts video can be useful.

Ellis • Apr 9 '20

Nice tutorial! The way it is written it is easy to understand. Thanks.
I also recommend to watch this ( youtube.com/watch?v=8Uwn5M6WTe0 ) video tutorial, here Laravel Sanctum is explained step by step in detail.

Balázs Györkös • Mar 24 '20

Hi! Nice tutorial! How to use axios in other compoents for further api requests?

Roman Paprotsky • Mar 24 '20

That's a good question, Balázs!

You can add in main.js:

Vue.prototype.$axios = axios

After that in components you can write:

$axios.get('/items')
  .then(function (response) {
    console.log(response)
  })

Ohidur Rahman Bappy • Aug 16 '20 • Edited

From child component I had to refer using this keyword

this.$axios.get('/items')
  .then(function (response) {
    console.log(response)
  })

Eugene van der Merwe • Jun 30 '20

I really love this article! I love the style of writing, and the way to code is presented. Furthermore the way the code is presented is very clear and concise. This is a great template to get to know a number of modern day Laravel/Vue.js concepts - APIs, Sanctum, Vuex, Vue routing. It will be my go to reference going forward. Thank you!

Roman Paprotsky • Jun 30 '20

Thank you for the kind words, Eugene!

Muhammad Naveed • Apr 5 '20

Hey Roman, thanks for the amazing thread, can you please guide us about using the Sanctum with multiple guards e.g. Admin, User.

haratmalli • May 19 '20

Did you find any solution related multiple guard authentication sanctum

Muhammad Naveed • May 19 '20

In Laravel multiple guards only work in session based auth that's why I ended up using "Token Abilities" which works fine for me, you can read more about Token Abilities in Laravel Sanctum docs, in Passport this feature is called token scopes. I hope it will help you.

Antonio Gil • Mar 28 '20

Hi, thanks for this tutorial, but you are using tokens here, what about cookies?

Roman Paprotsky • Mar 28 '20

Maybe, this article could be useful for you.

Roman Paprotsky • Mar 28 '20

Could you clarify your question, Antonio?

gcj • Aug 28 '20

Great Article, Currently I'm doing some coding practice with the laravel socialite package using postman for api request. Do you have a written article for this kind of log in using 3rd party API like google. facebook and twitter?