“How to implement Angular 10 + Nodejs JWT Token Based Authentication with MySQL Example?” is always a big common question in development world? So in the tutorial, I guide you very clearly how to build a full stack example to demonstrate an JWT Authentication flow from Angular (signup & signin with by JWT Token) to backend: Nodejs and database MySQL.
JSON Web Token
JSON Web Token (JWT) defines a compact and self-contained way for securely transmitting information between parties as a JSON object.
Scenarios where JSON Web Tokens are useful:
Authorization: the most common scenario for using JWT. Single Sign On is a feature that widely uses JWT
Information Exchange: Because JWTs can be signed, JSON Web Tokens are a good way of securely transmitting information between parties.
JSON Web Tokens consist of 3 parts:
Header
Payload
Signature
-> JWT looks like Header-Base64-String.Payload-Base64-String.Signature-Base64-String
Header consists of two parts:
token type.
hashing algorithm.
Angular 10 Nodejs/Express JWT token based Authentication example
We will build an application, from frontend (Angular) to backend (Nodejs/Express), which allows users to register, login account. This application is secured with JWT (JSON Web Token) authentication and Nodejs middleware security. Then, depending on the role of current User (user, pm or admin), this system accepts what he can access
NODEJS/EXPRESS BACK-END WITH MIDDLEWARE SECURITY
HTTP request that matches route will be accepted by CORS Middleware before coming to Security layer.
Security layer includes:
– JWT Authentication Middleware: verify SignUp, verify token
– Authorization Middleware: check User’s roles
Main Business Logic Processing interacts with database via Sequelize and send HTTP response (token, user information, data based on roles…) to client.
ANGULAR FRONT-END WITH INTERCEPTOR
– app.component is the parent component that contains routerLink and router-outlet for routing. It also has an authority variable as the condition for displaying items on navigation bar.
– user.component, pm.component, admin.component correspond to Angular Components for User Board, PM Board, Admin Board. Each Board uses user.service to access authority data.
– register.component contains User Registration form, submission of the form will call auth.service.
– login.component contains User Login form, submission of the form will call auth.service and token-storage.service.
– user.service gets access to authority data from Server using Angular HttpClient ($http service).
– auth.service handles authentication and signup actions with Server using Angular HttpClient ($http service).
– every HTTP request by $http service will be inspected and transformed before being sent to the Server by auth-interceptor (implements HttpInterceptor).
– auth-interceptor check and get Token from token-storage.service to add the Token to HTTP Request Header.
– token-storage.service manages Token inside Browser’s sessionStorage.
Link Tutorial: https://loizenai.com/angular-10-nodejs-jwt-authentication-mysql-examples-tutorials/
Youtube Link: https://youtu.be/rYmf_MthobU
GitHub: https://github.com/loizenai/Nodejs-Tutorials/tree/master/Angular 10 Nodejs JWT Token Based Authentication Example - Backend-Sourcecode
#nodejs #angular #angular10 #jwt #authentication #mysql