Part-1 VueJS JWT(JSON Web Token) Authentication(Access Token Implementation)

Adding data and methods

In the src/views/Login.vue file, add the following code:

Next, add the login() method:

Adding the login() action

In the store object inside the actions object, add a login() method:

Adding the routes

Open the src/router.js file and add two routes to the Signup and Login components.

importVuefrom'vue'importRouterfrom'vue-router'importHomefrom'./views/Home.vue'importSignupfrom'./views/Signup.vue'importLoginfrom'./views/Login.vue'Vue.use(Router)exportdefaultnewRouter({mode:'history',base:process.env.BASE_URL,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:'/signup',name:'signup',component:Signup},{path:'/login',name:'login',component:Login}]})

Authenticated api requests

For this portion, we’ll make use of Axios’ built-in interceptors feature, which allows us to modify requests and responses, as well as capture all errors. Thankfully, @nuxtjs/axios provides first-class support for this feature.

We’ll use a request interceptor to attach the access token to every API request.

plugins/axios.js — basic request interceptor to attach an authorization header

Author

Auth0

Basic page component and route configuration:

In this section, we will be going to implement vue js pages and their routes.

Let’s use bootstrap design in our sample so add the below CSS reference link in the index.html page of our VueJS application

public/index.html:(Just above closing head tag)

Create a free auth0 account

  1. Go to Auth0 and click Sign Up.
  2. Use Google, GitHub or Microsoft Account to login.

Create a vuejs 3.0 sample application:

Let’s begin by creating a VueJS 3.0 sample application.

Command To Install Vue CLI Globally On Your System
npm install -g @vue/cli
Command To Create A Vue App:
vue create your_app_name

Creating data and methods

In the same src/views/Signup.vue file, add the following code below the template:

Creating the login component

Create a src/views/Login.vue file and add the following template:

Creating the signup component

Create a src/views/Signup.vue file and add the following template:

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Further reading

Fullstack CRUD App:

Implementation

You can find step by step to implement this Node.js App in the post:Node.js – JWT Authentication & Authorization with JSONWebToken example

For using MongoDB:Node.js MongoDB: JWT Authentication & Authorization example

Or PostgreSQL:Node.js PostgreSQL: JWT Authentication & Authorization example

Implementing jwt authentication in the flask restful api

On the Flask side of things I will be using the Python package PyJWT to handle some of the particulars around creating, parsing, and validating JWTs.

(venv) $ pip install PyJWT

Implementing jwt authentication in vue.js spa

With the back-end side the of authentication equation complete I now need to button up the client side by implementing JWT authenitcation in Vue.js. I start by creating a new module within the app called “utils” within the src directory and placing an index.js file inside of the utils folder. This module will contain two things:

  1. An event bus which I can use to send messages around the application when certain things happen, like failed authentication in the event of a expired JWT
  2. A function to check a JWT to see if it is still valid or not

These two things are implemented like so:

import Vue from'vue'exportconst EventBus = new Vue()

exportfunctionisValidJwt (jwt) {
  if (!jwt || jwt.split('.').length < 3) {
    returnfalse
  }
  const data = JSON.parse(atob(jwt.split('.')[1]))
  const exp = newDate(data.exp * 1000) const now = newDate()
  return now < exp
}

Important snippets

The entry point for the app is at src/index.js. Here we import everything we need and set up routing.

Installing vue cli 3 and creating a project

In this tutorial we’ll be using Vue CLI 3 to create and work with our project. Vue CLI provides various presets that you can use to generate your project but it also allows you to choose the individual libraries that you want to include in your project.

First, install Vue CLI v3 using the following command:

Issue reporting

If you have found a bug or if you have a feature request, please report them at this repository issues section. Please do not report security vulnerabilities on the public GitHub issue tracker. The Responsible Disclosure Program details the procedure for disclosing security issues.

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Jwt authentication

Welcome to the sixth installment to this multi-part tutorial series on full-stack web development using Vue.js and Flask. In this post I will be demonstrating a way to use JSON Web Token (JWT) authentication.

The code for this post can be found on my GitHub account under the branch SixthPost.

License

This project is licensed under the MIT license. See the LICENSE file for more info.

Nestjs(nodejs) server jwt api:

Command To Install NestJS CLI:
npm i -g @nestjs/cli


Next, go to the root folder of the repo and run the command to install all the package

Command To Install ALL Packages In our Repository application:
npm install

That’s all we have set up a JWT API in our local system for testing, now run the following command to start the application.

Command To Start NestJS APP:
npm run start:dev

Our jwt token endpoint

Overview

Our Vue.js App can be summarized in component diagram below:

Let me explain it right now.

– The App component is a container with Router. It gets app state from Vuex store/auth. Then the navbar now can display based on the state. App component also passes state to its child components.

– Login & Register components have form for submission data (with support of vee-validate). We call Vuex store dispatch() function to make login/register actions.

Project structure

This is directory structure for our Node.js Express application:

– config

  • configure MySQL database & Sequelize
  • configure Auth Key

– routes

– middlewares

– controllers

– models for Sequelize Models

– server.js: import and initialize neccesary modules and routes, listen for connections.

Refresh tokens

However, what happens when the access token expires? For security reasons, access tokens shouldn’t be long-lived and should be easily revocable if necessary.

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Required npm packages:

Need to install the Vue routing library to configure routing into our application.

Command To Install Vue Router Library(For Vue3.0)
npm install vue-router@4

Need to install the Vuex Store library to configure state management to our application

Command To Install Vuex Store Library(For Vue3.0)
npm install vuex@next


Install Axios library to invoke API call’s in our application

Command To Install Axios Library
npm install axios

Resources

Want to learn more about the various frameworks used in this article? Try checking out some of the following resources for a deeper dive in to using Vue.js or building back-end APIs in Python:

Series content

  1. Seup and Getting to Know VueJS
  2. Navigating Vue Router
  3. State Management with Vuex
  4. RESTful API with Flask
  5. AJAX Integration with REST API
  6. JWT Authentication (you are here)
  7. Deployment to a Virtual Private Server

Technology

– vue: 2.6.10– vue-router: 3.0.3– vuex: 3.0.1– axios: 0.19.0– vee-validate: 2.2.15– bootstrap: 4.3.1– vue-fontawesome: 0.1.7

Vue 3 version at:Vue 3 Authentication with JWT, Vuex, Axios and Vue Router

What is auth0?

Auth0 helps you to:

Wrapping up:

Hopefully, I think this article delivered some useful information on access token implementation in VueJS 3.0 application. I love to have your feedback, suggestions, and better techniques in the comment section below.

Integrate jwt authentication endpoint:

Till now we used mocked jwt token, now we are going to use real Jwt authentication endpoint.

Let’s update the ‘login’ action method in store

src/store/modules/auth.js:(Update login action method)

Conclusion

Now we have an overview of Node.js Express Vue.js Authentication example using JWT and Vuex along with flow for signup/login actions.

We also take a look at Node.js Express server architecture for JWT Authentication using jsonwebtoken & Sequelize, as well as Vue.js project structure for building a front-end app working with JWT.

Next tutorials will show you more details about how to implement this interesting system:– Back-end– Front-end:

The Vue Clients also works well with back-end in the post:– Node.js MongoDB: JWT Authentication & Authorization– Node.js PostgreSQL: JWT Authentication & Authorization

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