Angular 12 JWT Authentication & Authorization with HttpOnly Cookie

In this tutorial, we’re gonna build an Angular 12 JWT Authentication & Authorization with HttpOnly Cookie and Web Api (including HttpInterceptor, Router & Form Validation). I will show you:

Flow for User Registration (Signup) & User Login with HttpOnly Cookie
Project Structure with HttpInterceptor, Router
Way to implement HttpInterceptor
How to store JWT token in HttpOnly Cookie
Creating Login, Signup Components with Form Validation
Angular Components for accessing protected Resources
How to add a dynamic Navigation Bar to Angular App
Working with Browser Session Storage

Let’s explore together.

Fullstack:
– Angular 12 + Spring Boot: JWT Authentication & Authorization example
– Angular 12 + Node.js Express: JWT Authentication & Authorization example

Newer versions:
– using Angular 13.
– using Angular 14

Overview of Angular 12 JWT Authentication with HttpOnly Cookie example

We will build an Angular 12 JWT Authentication & Authorization application with HttpOnly Cookie and Web Api in that:

There are Login and Registration pages.
Form data will be validated by front-end before being sent to back-end.
Depending on User’s roles (admin, moderator, user), Navigation Bar changes its items automatically.
Services contain methods for sending HTTP requests & receiving responses with HttpOnly Cookie

Here are the screenshots of our app:

– Signup/Registration Page:

Signup Successfully:

– Form Validation:

If you want to know more details about Form Validation, please visit:
Angular 12 Template Driven Forms Validation example

– Login Page:

HttpOnly Cookie set by the Server:

– Profile Page (for successful Login):

– For Authorization (Moderator account login), the navigation bar will change by authorities:

HttpOnly Cookie sent automatically with HTTP Request:

– Browser Local/Session Storage for storing user information:

For refresh token, please visit:
Angular Refresh Token with Interceptor and JWT example

User Authentication and Authorization Flow

For JWT Authentication, we’re gonna call 3 endpoints:

POST api/auth/signup for User Registration
POST api/auth/signin for User Login
POST api/auth/signout for User Logout

The following flow shows you an overview of Requests and Responses that Angular 12 Client will make or receive. This Angular Client uses JWT in Cookies while sending request to protected resources.

You can find step by step to implement these back-end servers in following tutorial:

Demo Video

This is full Angular 10 (similar to this Angular version 12) JWT Authentication App (including form validation, check signup username/email duplicates, test authorization for 3 roles: Admin, Moderator, User) with Spring Boot Server:

Angular + Node Express:

The Angular project in video uses Session Storage instead of HttpOnly Cookie for storing JWT, but the flow or structure is the same.

Component Diagram with Router and HttpInterceptor

Now look at the diagram below.

– The App component is a container using Router. It gets user user information from Browser Session Storage via storage.service. Then the navbar now can display based on the user login state & roles.

– Login & Register components have form for submission data (with support of Form Validation). They use storage.service for checking state and auth.service for sending signin/signup requests.

– auth.service uses Angular HttpClient ($http service) to make authentication requests.
– every HTTP request by $http service will be inspected and transformed before being sent by auth-interceptor.

– Home component is public for all visitor.

– Profile component get user data from Session Storage.

– BoardUser, BoardModerator, BoardAdmin components will be displayed depending on roles from Session Storage. In these components, we use user.service to get protected resources from API (with JWT in HttpOnly Cookie).

Technology

– Angular 12
– RxJS 6
– Angular CLI 12

Setup Angular 12 Jwt Authentication Project

Let’s open cmd and use Angular CLI to create a new Angular 12 Project as following command:

ng new Angular12JwtAuth
? Would you like to add Angular routing? Yes
? Which stylesheet format would you like to use? CSS

We also need to generate some Components and Services:

ng g s _services/auth
ng g s _services/storage
ng g s _services/user

ng g c login
ng g c register
ng g c home
ng g c profile
ng g c board-admin
ng g c board-moderator
ng g c board-user

After the previous process is done, under src folder, let’s create _helpers folder and http.interceptor.ts file inside.

Now you can see that our project directory structure looks like this.

Project Structure

With the explanation in Component Diagram above, you can easily understand this project structure.

How to store JWT token in HttpOnly Cookie in Angular

After receiving /login request, the server sends one or more Set-Cookie headers with the HTTP response.

The browser stores the Cookie and sends it with HTTP requests inside a Cookie HTTP header.

So how to tell browser that?
We will use withCredentials: true to attach the cookie to API calls for cross-site requests. It is because our Rest API and angular domains (ports) are different.

For example:

http.post('/auth/login', user, { withCredentials: true });
http.get('/test/user', { withCredentials: true });
http.get('/test/mod', { withCredentials: true });
http.get('/test/admin', { withCredentials: true });

We can also use Angular Http Interceptor to do this. So we don’t need to attach { withCredentials: true } on every request.

http.post('/auth/login', user);
http.get('/test/user');
http.get('/test/mod');
http.get('/test/admin');

// HttpRequestInterceptor implements HttpInterceptor
// automatically add { withCredentials: true }

Http Interceptor

HttpInterceptor has intercept() method to inspect and transform HTTP requests before they are sent to server.

HttpRequestInterceptor implements HttpInterceptor. We’re gonna add withCredentials: true to make browser include Cookie on the Request header (HttpOnly Cookie).

_helpers/http.interceptor.ts

import { Injectable } from '@angular/core';
import { HttpEvent, HttpInterceptor, HttpHandler, HttpRequest, HTTP_INTERCEPTORS } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable()
export class HttpRequestInterceptor implements HttpInterceptor {
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    req = req.clone({
      withCredentials: true,
    });

    return next.handle(req);
  }
}

export const httpInterceptorProviders = [
  { provide: HTTP_INTERCEPTORS, useClass: HttpRequestInterceptor, multi: true },
];

intercept() gets HTTPRequest object, change it and forward to HttpHandler object’s handle() method. It transforms HTTPRequest object into an Observable<HttpEvents>.

next: HttpHandler object represents the next interceptor in the chain of interceptors. The final ‘next’ in the chain is the Angular HttpClient.

Setup App Module

Open app.module.ts, then import FormsModule & HttpClientModule.
We also need to add authInterceptorProviders in providers. I will show you how to define it later on this tutorial (in http.interceptor.ts).

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { LoginComponent } from './login/login.component';
import { RegisterComponent } from './register/register.component';
import { HomeComponent } from './home/home.component';
import { ProfileComponent } from './profile/profile.component';
import { BoardAdminComponent } from './board-admin/board-admin.component';
import { BoardModeratorComponent } from './board-moderator/board-moderator.component';
import { BoardUserComponent } from './board-user/board-user.component';

import { httpInterceptorProviders } from './_helpers/http.interceptor';

@NgModule({
  declarations: [
    AppComponent,
    LoginComponent,
    RegisterComponent,
    HomeComponent,
    ProfileComponent,
    BoardAdminComponent,
    BoardModeratorComponent,
    BoardUserComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    FormsModule,
    HttpClientModule
  ],
  providers: [httpInterceptorProviders],
  bootstrap: [AppComponent]
})
export class AppModule { }

Create Services

Authentication Service

This service sends registration, login, logout HTTP POST requests to back-end.
It provides following important functions:

login(): POST {username, password}
register(): POST {username, email, password}
logout(): POST logout request

_services/auth.service.ts

import { Injectable } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { Observable } from 'rxjs';

const AUTH_API = 'http://localhost:8080/api/auth/';

const httpOptions = {
  headers: new HttpHeaders({ 'Content-Type': 'application/json' })
};

@Injectable({
  providedIn: 'root',
})
export class AuthService {
  constructor(private http: HttpClient) {}

  login(username: string, password: string): Observable<any> {
    return this.http.post(
      AUTH_API + 'signin',
      {
        username,
        password,
      },
      httpOptions
    );
  }

  register(username: string, email: string, password: string): Observable<any> {
    return this.http.post(
      AUTH_API + 'signup',
      {
        username,
        email,
        password,
      },
      httpOptions
    );
  }

  logout(): Observable<any> {
    return this.http.post(AUTH_API + 'signout', { }, httpOptions);
  }
}

Storage Service

StorageService manages user information (username, email, roles) inside Browser’s Session Storage. For Logout, we will clear this Session Storage.

_services/storage.service.ts

import { Injectable } from '@angular/core';

const USER_KEY = 'auth-user';

@Injectable({
  providedIn: 'root'
})
export class StorageService {
  constructor() {}

  clean(): void {
    window.sessionStorage.clear();
  }

  public saveUser(user: any): void {
    window.sessionStorage.removeItem(USER_KEY);
    window.sessionStorage.setItem(USER_KEY, JSON.stringify(user));
  }

  public getUser(): any {
    const user = window.sessionStorage.getItem(USER_KEY);
    if (user) {
      return JSON.parse(user);
    }

    return {};
  }

  public isLoggedIn(): boolean {
    const user = window.sessionStorage.getItem(USER_KEY);
    if (user) {
      return true;
    }

    return false;
  }
}

Data Service

This service provides methods to access public and protected resources. Because HttpOnly Cookies will be automatically sent along with HTTP requests (via Http Interceptor), so we just simply use Http module without caring about JWT.

_services/user.service.ts

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

const API_URL = 'http://localhost:8080/api/test/';

@Injectable({
  providedIn: 'root',
})
export class UserService {
  constructor(private http: HttpClient) {}

  getPublicContent(): Observable<any> {
    return this.http.get(API_URL + 'all', { responseType: 'text' });
  }

  getUserBoard(): Observable<any> {
    return this.http.get(API_URL + 'user', { responseType: 'text' });
  }
  
  getModeratorBoard(): Observable<any> {
    return this.http.get(API_URL + 'mod', { responseType: 'text' });
  }

  getAdminBoard(): Observable<any> {
    return this.http.get(API_URL + 'admin', { responseType: 'text' });
  }
}

Add Bootstrap to Angular project

Open index.html and import Bootstrap inside <head /> tag.

<!DOCTYPE html>
<html lang="en">
  <head>
    ...
    <link
      rel="stylesheet"
      href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
      integrity="sha384-zCbKRCUGaJDkqS1kPbPd7TveP5iyJE0EjAuZQTgFLD2ylzuqKfdKlfG/eSrtxUkn"
      crossorigin="anonymous"
    />
  </head>
  <body>
    <app-root></app-root>
  </body>
</html>

Create Components for Authentication

Register Component

This component binds form data (username, email, password) from template to AuthService.register() method that returns an Observable object.

register/register.component.ts

import { Component, OnInit } from '@angular/core';
import { AuthService } from '../_services/auth.service';

@Component({
  selector: 'app-register',
  templateUrl: './register.component.html',
  styleUrls: ['./register.component.css']
})
export class RegisterComponent implements OnInit {
  form: any = {
    username: null,
    email: null,
    password: null
  };
  isSuccessful = false;
  isSignUpFailed = false;
  errorMessage = '';

  constructor(private authService: AuthService) { }

  ngOnInit(): void {
  }

  onSubmit(): void {
    const { username, email, password } = this.form;

    this.authService.register(username, email, password).subscribe({
      next: data => {
        console.log(data);
        this.isSuccessful = true;
        this.isSignUpFailed = false;
      },
      error: err => {
        this.errorMessage = err.error.message;
        this.isSignUpFailed = true;
      }
    });
  }
}

We use Form Validation in the template:

username: required, minLength=3, maxLength=20
email: required, email format
password: required, minLength=6

register/register.component.html

<div class="col-md-12">
  <div class="card card-container">
    <img
      id="profile-img"
      src="//ssl.gstatic.com/accounts/ui/avatar_2x.png"
      class="profile-img-card"
    />
    <form
      *ngIf="!isSuccessful"
      name="form"
      (ngSubmit)="f.form.valid && onSubmit()"
      #f="ngForm"
      novalidate
    >
      <div class="form-group">
        <label for="username">Username</label>
        <input
          type="text"
          class="form-control"
          name="username"
          [(ngModel)]="form.username"
          required
          minlength="3"
          maxlength="20"
          #username="ngModel"
        />
        <div class="alert-danger" *ngIf="username.errors && f.submitted">
          <div *ngIf="username.errors['required']">Username is required</div>
          <div *ngIf="username.errors['minlength']">
            Username must be at least 3 characters
          </div>
          <div *ngIf="username.errors['maxlength']">
            Username must be at most 20 characters
          </div>
        </div>
      </div>
      <div class="form-group">
        <label for="email">Email</label>
        <input
          type="email"
          class="form-control"
          name="email"
          [(ngModel)]="form.email"
          required
          email
          #email="ngModel"
        />
        <div class="alert-danger" *ngIf="email.errors && f.submitted">
          <div *ngIf="email.errors['required']">Email is required</div>
          <div *ngIf="email.errors['email']">
            Email must be a valid email address
          </div>
        </div>
      </div>
      <div class="form-group">
        <label for="password">Password</label>
        <input
          type="password"
          class="form-control"
          name="password"
          [(ngModel)]="form.password"
          required
          minlength="6"
          #password="ngModel"
        />
        <div class="alert-danger" *ngIf="password.errors && f.submitted">
          <div *ngIf="password.errors['required']">Password is required</div>
          <div *ngIf="password.errors['minlength']">
            Password must be at least 6 characters
          </div>
        </div>
      </div>
      <div class="form-group">
        <button class="btn btn-primary btn-block">Sign Up</button>
      </div>

      <div class="alert alert-warning" *ngIf="f.submitted && isSignUpFailed">
        Signup failed!<br />{{ errorMessage }}
      </div>
    </form>

    <div class="alert alert-success" *ngIf="isSuccessful">
      Your registration is successful!
    </div>
  </div>
</div>

In the code above, we use Template Driven Form, for more details please visit:
Angular 12 Template Driven Forms Validation example

Login Component

Login Component also uses AuthService to work with Observable object. Besides that, it calls StorageService methods to check loggedIn status and save User info to Session Storage.

login/login.component.ts

import { Component, OnInit } from '@angular/core';
import { AuthService } from '../_services/auth.service';
import { StorageService } from '../_services/storage.service';

@Component({
  selector: 'app-login',
  templateUrl: './login.component.html',
  styleUrls: ['./login.component.css']
})
export class LoginComponent implements OnInit {
  form: any = {
    username: null,
    password: null
  };
  isLoggedIn = false;
  isLoginFailed = false;
  errorMessage = '';
  roles: string[] = [];

  constructor(private authService: AuthService, private storageService: StorageService) { }

  ngOnInit(): void {
    if (this.storageService.isLoggedIn()) {
      this.isLoggedIn = true;
      this.roles = this.storageService.getUser().roles;
    }
  }

  onSubmit(): void {
    const { username, password } = this.form;

    this.authService.login(username, password).subscribe({
      next: data => {
        this.storageService.saveUser(data);

        this.isLoginFailed = false;
        this.isLoggedIn = true;
        this.roles = this.storageService.getUser().roles;
        this.reloadPage();
      },
      error: err => {
        this.errorMessage = err.error.message;
        this.isLoginFailed = true;
      }
    });
  }

  reloadPage(): void {
    window.location.reload();
  }
}

Here are what we validate in the form:

username: required
password: required, minLength=6

login/login.component.html

<div class="col-md-12">
  <div class="card card-container">
    <img
      id="profile-img"
      src="//ssl.gstatic.com/accounts/ui/avatar_2x.png"
      class="profile-img-card"
    />
    <form
      *ngIf="!isLoggedIn"
      name="form"
      (ngSubmit)="f.form.valid && onSubmit()"
      #f="ngForm"
      novalidate
    >
      <div class="form-group">
        <label for="username">Username</label>
        <input
          type="text"
          class="form-control"
          name="username"
          [(ngModel)]="form.username"
          required
          #username="ngModel"
        />
        <div
          class="alert alert-danger"
          role="alert"
          *ngIf="username.errors && f.submitted"
        >
          Username is required!
        </div>
      </div>
      <div class="form-group">
        <label for="password">Password</label>
        <input
          type="password"
          class="form-control"
          name="password"
          [(ngModel)]="form.password"
          required
          minlength="6"
          #password="ngModel"
        />
        <div
          class="alert alert-danger"
          role="alert"
          *ngIf="password.errors && f.submitted"
        >
          <div *ngIf="password.errors['required']">Password is required</div>
          <div *ngIf="password.errors['minlength']">
            Password must be at least 6 characters
          </div>
        </div>
      </div>
      <div class="form-group">
        <button class="btn btn-primary btn-block">
          Login
        </button>
      </div>
      <div class="form-group">
        <div
          class="alert alert-danger"
          role="alert"
          *ngIf="f.submitted && isLoginFailed"
        >
          Login failed: {{ errorMessage }}
        </div>
      </div>
    </form>

    <div class="alert alert-success" *ngIf="isLoggedIn">
      Logged in as {{ roles }}.
    </div>
  </div>
</div>

Profile Component

This Component gets current User from Storage using StorageService and show information (username, token, email, roles).

profile/profile.component.ts

import { Component, OnInit } from '@angular/core';
import { StorageService } from '../_services/storage.service';

@Component({
  selector: 'app-profile',
  templateUrl: './profile.component.html',
  styleUrls: ['./profile.component.css']
})
export class ProfileComponent implements OnInit {
  currentUser: any;

  constructor(private storageService: StorageService) { }

  ngOnInit(): void {
    this.currentUser = this.storageService.getUser();
  }
}

profile/profile.component.html

<div class="container" *ngIf="currentUser; else loggedOut">
  <header class="jumbotron">
    <h3>
      <strong>{{ currentUser.username }}</strong> Profile
    </h3>
  </header>
  <p>
    <strong>Email:</strong>
    {{ currentUser.email }}
  </p>
  <strong>Roles:</strong>
  <ul>
    <li *ngFor="let role of currentUser.roles">
      {{ role }}
    </li>
  </ul>
</div>

<ng-template #loggedOut>
  Please login.
</ng-template>

Create Role-based Components

Public Component

Our Home Component will use UserService to get public resources from back-end.

home/home.component.ts

import { Component, OnInit } from '@angular/core';
import { UserService } from '../_services/user.service';

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.css']
})
export class HomeComponent implements OnInit {
  content?: string;

  constructor(private userService: UserService) { }

  ngOnInit(): void {
    this.userService.getPublicContent().subscribe({
      next: data => {
        this.content = data;
      },
      error: err => {console.log(err)
        if (err.error) {
          this.content = JSON.parse(err.error).message;
        } else {
          this.content = "Error with status: " + err.status;
        }
      }
    });
  }
}

home/home.component.html

<div class="container">
  <header class="jumbotron">
    <p>{{ content }}</p>
  </header>
</div>

Protected Components

These Components are role-based. But authorization will be processed by back-end.
We only need to call UserService methods:

getUserBoard()
getModeratorBoard()
getAdminBoard()

Here is an example for BoardAdminComponent.
BoardModeratorComponent & BoardUserComponent are similar.

board-admin/board-admin.component.ts

import { Component, OnInit } from '@angular/core';
import { UserService } from '../_services/user.service';

@Component({
  selector: 'app-board-admin',
  templateUrl: './board-admin.component.html',
  styleUrls: ['./board-admin.component.css']
})
export class BoardAdminComponent implements OnInit {
  content?: string;

  constructor(private userService: UserService) { }

  ngOnInit(): void {
    this.userService.getAdminBoard().subscribe({
      next: data => {
        this.content = data;
      },
      error: err => {console.log(err)
        if (err.error) {
          this.content = JSON.parse(err.error).message;
        } else {
          this.content = "Error with status: " + err.status;
        }
      }
    });
  }
}

board-admin/board-admin.component.html

<div class="container">
  <header class="jumbotron">
    <p>{{ content }}</p>
  </header>
</div>

App Routing Module

We configure the Routing for our Angular app in app-routing.module.ts.

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';

import { RegisterComponent } from './register/register.component';
import { LoginComponent } from './login/login.component';
import { HomeComponent } from './home/home.component';
import { ProfileComponent } from './profile/profile.component';
import { BoardUserComponent } from './board-user/board-user.component';
import { BoardModeratorComponent } from './board-moderator/board-moderator.component';
import { BoardAdminComponent } from './board-admin/board-admin.component';

const routes: Routes = [
  { path: 'home', component: HomeComponent },
  { path: 'login', component: LoginComponent },
  { path: 'register', component: RegisterComponent },
  { path: 'profile', component: ProfileComponent },
  { path: 'user', component: BoardUserComponent },
  { path: 'mod', component: BoardModeratorComponent },
  { path: 'admin', component: BoardAdminComponent },
  { path: '', redirectTo: 'home', pathMatch: 'full' }
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

Routes array is passed to the RouterModule.forRoot() method.
We’re gonna use <router-outlet></router-outlet> directive in the App Component where contains navbar and display Components (corresponding to routes) content.

App Component

This component is the root Component of our Angular 12 application, it defines the root tag: <app-root></app-root> that we use in index.html.

app.component.ts

import { Component } from '@angular/core';
import { StorageService } from './_services/storage.service';
import { AuthService } from './_services/auth.service';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  private roles: string[] = [];
  isLoggedIn = false;
  showAdminBoard = false;
  showModeratorBoard = false;
  username?: string;

  constructor(private storageService: StorageService, private authService: AuthService) { }

  ngOnInit(): void {
    this.isLoggedIn = this.storageService.isLoggedIn();

    if (this.isLoggedIn) {
      const user = this.storageService.getUser();
      this.roles = user.roles;

      this.showAdminBoard = this.roles.includes('ROLE_ADMIN');
      this.showModeratorBoard = this.roles.includes('ROLE_MODERATOR');

      this.username = user.username;
    }
  }

  logout(): void {
    this.authService.logout().subscribe({
      next: res => {
        console.log(res);
        this.storageService.clean();
      },
      error: err => {
        console.log(err);
      }
    });
    
    window.location.reload();
  }
}

First, we check isLoggedIn status using StorageService, if it is true, we get user’s roles and set value for showAdminBoard & showModeratorBoard flag. They will control how template navbar displays its items.

The App Component template also has a Logout button link that call logout() method and reload the window.

app.component.html

<div id="app">
  <nav class="navbar navbar-expand navbar-dark bg-dark">
    <a href="#" class="navbar-brand">bezKoder</a>
    <ul class="navbar-nav mr-auto" routerLinkActive="active">
      <li class="nav-item">
        <a href="/home" class="nav-link" routerLink="home">Home </a>
      </li>
      <li class="nav-item" *ngIf="showAdminBoard">
        <a href="/admin" class="nav-link" routerLink="admin">Admin Board</a>
      </li>
      <li class="nav-item" *ngIf="showModeratorBoard">
        <a href="/mod" class="nav-link" routerLink="mod">Moderator Board</a>
      </li>
      <li class="nav-item">
        <a href="/user" class="nav-link" *ngIf="isLoggedIn" routerLink="user">User</a>
      </li>
    </ul>

    <ul class="navbar-nav ml-auto" *ngIf="!isLoggedIn">
      <li class="nav-item">
        <a href="/register" class="nav-link" routerLink="register">Sign Up</a>
      </li>
      <li class="nav-item">
        <a href="/login" class="nav-link" routerLink="login">Login</a>
      </li>
    </ul>

    <ul class="navbar-nav ml-auto" *ngIf="isLoggedIn">
      <li class="nav-item">
        <a href="/profile" class="nav-link" routerLink="profile">{{ username }}</a>
      </li>
      <li class="nav-item">
        <a href class="nav-link" (click)="logout()">LogOut</a>
      </li>
    </ul>
  </nav>

  <div class="container">
    <router-outlet></router-outlet>
  </div>
</div>

Run the Angular 12 JWT Authentication and Authorization project

You can run this App with command: ng serve.

This client will work well with the back-end in following posts:

Before running the backend server, you need to add minor configuration:
– Spring Boot:

/* In AuthController.java */
// @CrossOrigin(origins = "*", maxAge = 3600)
@CrossOrigin(origins = "http://localhost:8081", maxAge = 3600, allowCredentials="true")

/* In TestController.java */
// @CrossOrigin(origins = "*", maxAge = 3600)
@CrossOrigin(origins = "http://localhost:8081", maxAge = 3600, allowCredentials="true")

– Node.js Express:

/* In server.js */
// app.use(cors());
app.use(
  cors({
    credentials: true,
    origin: ["http://localhost:8081"],
  })
);

They configure CORS for port 8081, so you have to run Angular Client command instead:
ng serve --port 8081

Conclusion

Today we’ve done so many things from setup Angular 12 Token based Authentication Project to write Login and Registration example with Services, Components with JWT, HttpOnly Cookie and Web Api. I hope you understand the overall layers of our Angular application, and apply it in your project at ease. Now you can build a front-end app that supports JWT Authentication & Authorization with Angular 12, HttpInterceptor and Router.

You will need to implement refresh token:
Angular Refresh Token with Interceptor and JWT example

For working with HTTP Authorization Header, please visit:
Angular 12 Login and Registration example with JWT & Web Api

Happy learning, see you again!

Source Code

You can find the complete source code for this tutorial on Github.