To implement authentication and authorization in a Vue.js app, you can follow these steps:
Set up a backend server: You will need a backend server to handle auth-related tasks like validating credentials, generating tokens, and managing user roles. You can use any backend technology, such as Node.js with Express, Django, Ruby on Rails, etc.
Create login and register components: Create components for login and registration forms where users can enter their credentials. You can use Vue Router to handle routing between these components.
Send login/register requests to the server: In the login and register components, use HTTP clients like Axios or fetch API to send login and register requests with the user's credentials to the server.
Server-side authentication: On the server-side, validate the user's credentials in the authentication endpoint. If the credentials are valid, generate a token (e.g., a JSON Web Token) and send it back as a response.
Store the token: In the Vue.js app, store the token securely, preferably in browser storage like localStorage or sessionStorage. You can use Vuex to manage the token state globally across components.
Protect routes: Use Vue Router navigation guards to protect routes that require authentication. For example, you can create a beforeEach guard that checks if the token exists and is valid before allowing the user to access a protected route.
Retrieve user information: When the user logs in, store additional information like user roles in the token or make an additional request to the server to retrieve user details. Store this information in the app's state or Vuex store for authorization purposes.
Perform authorization checks: In your components or routes that require authorization, check the user's roles or permissions before allowing them to perform certain actions or access specific content. You can use computed properties, conditional rendering, or custom directives to handle authorization logic.
Remember to handle token expiration, token refreshing, and logging out by removing the token from storage and redirecting the user to the login page.
Additionally, ensure to secure your backend APIs with appropriate authentication middleware and perform server-side authorization checks to prevent unauthorized access to sensitive data or actions.