JWT Authentication Tutorial

This Spring Boot application demonstrates JSON Web Token (JWT) authentication. It provides an API endpoint for authentication using JWT.

Overview

The HomeController class is a Spring @RestController that handles incoming requests related to user authentication using JWT. It contains two endpoints:

1. GET /: Returns a welcome message indicating the start of the JWT Tutorial.

2. POST /authenticate: Accepts a JwtRequest containing a username and password. It authenticates the user's credentials using Spring Security's AuthenticationManager. If the credentials are valid, it generates a JWT token using the JwtUtility and returns it as a JwtResponse.

Usage

Home Endpoint

• Access the root endpoint (/) to receive a welcome message indicating the start of the JWT tutorial.

Authentication Endpoint

• Use a POST request to /authenticate with a JSON body containing username and password fields in a JwtRequest.
• If the credentials are valid, the endpoint generates a JWT token using the JwtUtility and returns it wrapped in a JwtResponse.

Components

• MyUserDetailsService: A service responsible for fetching user details from a data source.
• JwtUtility: A utility class to handle JWT token generation and parsing.
• AuthenticationManager: Provided by Spring Security for user authentication.

How to Use

1. Integration: Integrate this service into your application to enable JWT-based authentication.
2. Authentication: Send a POST request to /authenticate with valid user credentials in the JwtRequest body.
3. Token Handling: Upon successful authentication, retrieve the JWT token from the JwtResponse for subsequent authorized requests.

Contributing

Contributions to enhance security, add more endpoints, or improve functionality are welcome. Feel free to fork this repository, make changes, and create a pull request.

License

This project is licensed under the MIT License.

JWTdemo

making a request to genrate a token and using the token to access a protected route