Authentication with Angular and Auth0

This tutorial demonstrates building an Angular application ("Daily Deals") featuring public and private deals, with private deals accessible only to authenticated users via token-based authentication with Auth0. The Angular CLI streamlines development, managing routing, component generation, and builds. The HttpClient Module facilitates API interaction for data retrieval. A simple Node.js server serves deal data, with routes protected by middleware verifying JWTs in authorization headers. The tutorial details Auth0 integration, including securing API endpoints, client-side authentication handling, and managing user authentication states within the Angular application.

Key Improvements Over AngularJS:

Angular transcends AngularJS 1.x, evolving from a framework to a comprehensive platform for modern application development. Key advancements include server-side rendering and the official integration of Material Design.

Daily Deals Application Overview:

The "Daily Deals" app showcases public and private deals. Private deals are exclusive to registered users.

Back-End (Node.js) Setup:

A basic Node.js server serves as the data source. Initially, both public and private deal routes are publicly accessible. The deal data structure is as follows:

{
  id: 1234,
  name: 'Product Name',
  description: 'Product Description',
  originalPrice: 19.99,
  salePrice: 9.99
}

Front-End (Angular) Setup:

The Angular CLI (ng new ng2auth --routing --skip-tests) creates the application structure. Subsequent commands generate components (ng g c ...), a service (ng g s deal), and a class for the deal object. The HttpClient module is added to app.module.ts for HTTP requests. Bootstrap CSS is included for styling.

Root Component (app.component.ts):

The root component manages routing and displays the navigation bar.

Routing (app-routing.module.ts):

Routes are defined for public deals, private deals, and the Auth0 callback.

Deal Type (deal.ts):

A Deal class defines the structure of deal objects for type safety and improved code maintainability.

Public and Private Deals Components:

These components fetch and display deals from their respective API endpoints. Error handling and a purchase notification are implemented.

Deal Service (deal.service.ts):

This service handles HTTP requests to fetch public and private deals from the Node.js server.

Adding Auth0 Authentication:

Auth0 is integrated for user authentication. An API is created in the Auth0 dashboard, and the server is secured using JWT middleware. The Angular application uses the Auth0 SDK (npm install auth0-js --save). Environment variables in environment.ts store Auth0 configuration details.

Authentication Service (auth.service.ts):

This service handles user login, logout, token management, and user profile retrieval.

Route Guard (auth.guard.ts):

An AuthGuard protects the private deals route, redirecting unauthenticated users to the login page.

Callback Component (callback.component.ts):

This component handles the Auth0 callback, processing the authentication response and setting the user session.

Updated Deal Service:

The getPrivateDeals() method now includes an Authorization header with the access token.

Testing the Application:

After setting up the Auth0 configuration, the application can be tested. Logging in redirects to the Auth0 login page, and after successful authentication, private deals become accessible.

Conclusion:

This comprehensive tutorial provides a robust foundation for building secure, authenticated Angular applications using Auth0. The use of best practices, including route guards and proper token handling, ensures a secure and user-friendly experience. The FAQs section addresses common questions regarding social login, error handling, and advanced Auth0 features.

The above is the detailed content of Authentication with Angular and Auth0. For more information, please follow other related articles on the PHP Chinese website!