Angular 11 JWT Authentication example

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Project Name : ANGULAR-11-JWT-AUTHENTICATION-FRONT
Project Description : A DemoProject for presenting my way of managing jwt auth in the front with angular using GUARDS / INTERCEPTORS / LOCALSTORAGE / ANGULAR-JWT2
Project Developer : @OrbitTurner : https://orbitturner.com
Project Main Language : TYPESCRIPT - ANGULAR 11
Project Start Date : 04/01/2021
Project Type : Web Application / SAAS
Project License : 💚 GNU ✔ ITS FREE and OPEN just credit me.
Project Inspired From : MOHAMED YOUSSFI - ANGULAR ACADEMY - BEZCODER
Project Repository : https://github.com/orbitturner/ANGULAR-11-JWT-AUTH-FRONT-CLIENT

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#IF YOU DOWNLOAD THE PROJECT IT CAN HAVING PROBLEM WORKING BECAUSE IT WAS MADE JUST TO DEMONSTRATE HOW TO SETUP THESE FOLLOWING :
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• AUTH.INTERCEPTOR.TS
• AUTH.SERVICE.TS
• LOGIN.COMPONENT.TS
• API.CONFIG.TS
• APP.MODULE.TS

So you can use these files as they are in your project without any difficulty !

PRE-REQUISITE

• ANGULAR-JWT2 ["angular2-jwt": "^0.2.3"]
• A BACKEND API APP ON SPRING BOOT WITH JWT CONFIGURED IN SPRING SECURITY
• IF U HAVE PROBLEM WITH ANGULAR-JWT2 REPLACE THE LINE 88 IN (ANGULAR2-JWT.D.TS) WITH THIS:

static forRoot(config: AuthConfig): ModuleWithProviders;

Flow for User Registration and User Login

For JWT – Token based Authentication with Web API, we’re gonna call 2 endpoints:

• POST api/auth/signup for User Registration
• POST api/auth/signin for User Login

You can take a look at following flow to have an overview of Requests and Responses that Angular 11 Client will make or receive.

Angular JWT App Diagram with Router and HttpInterceptor

With Spring Boot back-end

This project is the Front Client for a Spring Boot Backend. So it suppose you already have a fully finished Spring boot backend app with Rest Api and Spring Security Configured on JWT.

The Backend Spring JWTAuthenticationFilter must be configured to receive JSON User to authenticate as the following:

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Run ng serve for a dev server. Navigate to http://localhost:4200/.

With Node.js Express back-end

If You are on a Node.Js for your backend? You need some modification :

Open app/_helpers/auth.interceptor.js, modify the code to work with x-access-token like this:

...

// const TOKEN_HEADER_KEY = 'Authorization'; // for Spring Boot back-end
const TOKEN_HEADER_KEY = 'x-access-token';   // for Node.js Express back-end

@Injectable()
export class AuthInterceptor implements HttpInterceptor {
  ...

  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    ...
    if (token != null) {
      // for Spring Boot back-end
      // authReq = req.clone({ headers: req.headers.set(TOKEN_HEADER_KEY, 'Bearer ' + token) });

      // for Node.js Express back-end
      authReq = req.clone({ headers: req.headers.set(TOKEN_HEADER_KEY, token) });
    }
    return next.handle(authReq);
  }
}

...

Run ng serve --port 8081 for a dev server. Navigate to http://localhost:8081/.