Angular Spring Boot jwt Authentication Example
Tags: angular, jwt, authentication, example
Published: 2021-01-03 16:02:34

# Angular Spring Boot jwt Authentication Example Github

https://loizenai.com/angular-spring-boot-jwt/

![Angular Spring Boot jwt Authentication Example Github](https://loizenai.com/wp-content/uploads/2020/12/Angular-SpringBoot-Jwt-Authentication-Example.png)

Tutorial: ” Angular Spring Boot jwt Authentication Example Github – Angular Authentication and Authorization ”

JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. So in tutorial ‘JWT Role Based Authorization with Spring Boot and Angular (Spring Boot Login Example)’, I guide you very clearly how to implement full stack example to demonstrade an jwt token based authentication flow from frontend Angular to backend: SpringBoot and MySQL.

– I give you an Epic of the application, a fullstack excutive flow from frontend – Angular to backend – SpringBoot with overall architecture diagram.
– I give you an architecture diagram of SpringBoot security backend.
– I give you a working flow diagram of Angular JWT Application.
– I guide you step by step how to develop a Backend SpringBoot secured RestAPIs with JWT token.
– I guide you step by step how to develop an Angular JWT Token Authentication application.
– Finally, I do an integrative testing from Angular JWT Authentication application to SpringBoot Backend Security RestAPIs.

## Project Goal – Angular Spring Boot jwt Authentication Example Github

We will build an application, from frontend (Angular) to backend (Spring Boot), which allows users to register, login account. This application is secured with JWT (JSON Web Token) authentication and Spring Security. Then, depending on the role of current User (user, pm or admin), this system accepts what he can access:

![Angular Login Form](https://loizenai.com/wp-content/uploads/2020/11/Angular-8-Login-Form.png)

![Angular Register Form](https://loizenai.com/wp-content/uploads/2020/11/Angular-8-Register-Form.png)

![Angular Home Page of a User with USER_ROLE](https://loizenai.com/wp-content/uploads/2020/11/Angular-8-Home-Page-of-a-User-with-USER_ROLE.png)

![Angular Content Page of a User with USER_ROLE](https://loizenai.com/wp-content/uploads/2020/11/Angular-8-Content-Page-of-a-User-with-USER_ROLE.png)

The diagram below show how our system handles User Registration and User Login processes:

![Angular Spring Boot Security Jwt Token Authentication Work Process Diagram](https://loizenai.com/wp-content/uploads/2020/11/Angular-8-Spring-Boot-Security-Jwt-Token-Authentication-Work-Process-Diagram.png)

## Spring Boot Token Based Authentication Example backend – Angular Spring Boot jwt Authentication Example Github

This is diagram for SpringBoot Token based authentication Security/JWT classes that are separated into 3 layers:
– HTTP
– Spring Security
– REST API

![Angular Jwt Token Workflow Diagram](https://loizenai.com/wp-content/uploads/2020/11/Angular-8-Jwt-Token-Workflow-Diagram.png)

– SecurityContextHolder provides access to the SecurityContext.
– SecurityContext holds the Authentication and possibly request-specific security information.
– Authentication represents the principal which includes GrantedAuthority that reflects the application-wide permissions granted to a principal.
– UserDetails contains necessary information to build an Authentication object from DAOs or other source of security data.
– UserDetailsService helps to create a UserDetails from a String-based username and is usually used by AuthenticationProvider.
– JwtAuthTokenFilter (extends OncePerRequestFilter) pre-processes HTTP request, from Token, create Authentication and populate it to SecurityContext.
– JwtProvider validates, parses token String or generates token String from UserDetails.
– UsernamePasswordAuthenticationToken gets username/password from login Request and combines into an instance of Authentication interface.
– AuthenticationManager uses DaoAuthenticationProvider (with help of UserDetailsService & PasswordEncoder) to validate instance of UsernamePasswordAuthenticationToken, then returns a fully populated Authentication instance on successful authentication.
– SecurityContext is established by calling SecurityContextHolder.getContext().setAuthentication(…​) with returned authentication object above.
– AuthenticationEntryPoint handles AuthenticationException.
– Access to Restful API is protected by HTTPSecurity and authorized with Method Security Expressions.

## Angular JWT Authentication Example with Interceptor – Angular Authentication and Authorization

In the tutorial, “Angular + Spring Boot JWT Token Based Authentication Example – Angular Authentication and Authorization”, we need the Angular HTTP Interceptor to add JWT Token Based for Security authentication:

![Angular JWT Token Workflow](https://loizenai.com/wp-content/uploads/2020/11/Angular-8-JWT-Token-Workflow.png)

– 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 Authorization Header of the HTTP Requests.

## Video Guide – Angular Spring Boot jwt Authentication Example Github – Angular Authentication and Authorization

https://youtu.be/7ZfInOvFsz0

## Overview SpringBoot JWT Token Based Authentication Example

Look back to the diagram for Spring Security/JWT classes that are separated into 3 layers:
– HTTP
– Spring Security
– REST API

![SpringBoot Security JWT Token Authentication Architecture Diagram BackEnd](https://loizenai.com/wp-content/uploads/2020/11/SpringBoot-Security-JWT-Token-Authentication-Architecture-Diagram-BackEnd.png)

## Related post

- [Reactjs JWT Authentication Example](https://loizenai.com/reactjs-jwt-authentication-example/)
- [Angular 10 Spring Boot Jwt Authentication Example](https://loizenai.com/angular-10-spring-boot-jwt-authentication-example/)
- [Angular 11 SpringBoot JWT Authentication Example](https://loizenai.com/angular-11-spring-boot-jwt-authentication-example/)
- [Reactjs Jwt SpringBoot Token Authentication Example](https://loizenai.com/jwt-springboot-reactjs-token-authentication-example/)
- [Angular 8 SpringBoot JWT Token Authentication Example](https://loizenai.com/angular-8-springboot-jwt-authentication/)
- [Angular 9 jwt Login Authentication Example](https://loizenai.com/angular-9-jwt-login-authentication-example/)

## Youtube - angular springBoot jwt authentication example

https://www.youtube.com/watch?v=7ZfInOvFsz0&t=868s