Express.js JWT Authentication Example

This example demonstrates a JWT (JSON Web Token) based authentication application using Express.js. This application creates a JWT during user login and uses this token to control access to protected routes.

Technologies Used

• Node.js
• Express.js
• JSON Web Token (JWT)
• bcrypt (for hashing)
• MongoDB (as database)

Getting Started

1. In the project directory, run the following command to install dependencies:

   npm install
   

2. Copy the .env.example file to create a new .env file and add your MongoDB connection URL and a secret key for JWT inside it.

3. Start your MongoDB connection:

   mongod
   

4. Start the application by running the following command:

   npm start
   

Usage

• User Signup: You can create a new user by sending a POST request to the /user endpoint. You should send username and password fields in JSON format.

• User Login: You can log in as a user by sending a POST request to the /auth/login endpoint. Upon successful login, you will receive a JWT token.

Environment Variables

You can use the following environment variables:

• PORT: The port number on which the application will run (default: 3000).
• MONGODB_CONN: MongoDB connection URL.
• JWT_SECRET: Secret key for JWT tokens.

Contributing

If you have any feedback or would like to contribute to this project, feel free to submit a pull request to the GitHub repository.