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Stew Authentication Microservice

Features

1. User Authentication and Management

  • Sign Up and Login: Provides endpoints for user registration (/signup) and login (/login). During sign-up, it checks for unique usernames and hashes passwords using bcrypt before storing them.
  • JWT Token Generation: On successful login, the service issues a JWT token, which can be used for maintaining session state and securing further API requests.
  • Input Validation and Sanitization: Input validation and sanitization are performed using express-validator and custom sanitizers to ensure that the data is secure and formatted correctly.

2. Security and Error Handling

  • Error Handling: Custom error classes (AuthenticationError, ValidationError, RateLimitError) are used to handle different types of errors elegantly and to provide meaningful error messages to the client.
  • Rate Limiting: Rate limiting is implemented for both sign-up and login routes to prevent brute force attacks.
  • Secure Password Handling: Passwords are securely hashed using bcrypt, ensuring that plaintext passwords are never stored or transmitted.

3. Middleware for JWT Verification

  • Token Verification: A middleware function (authenticateToken) is included to verify JWT tokens. It's used to secure other endpoints in your microservices, ensuring that only valid and unaltered tokens are accepted.

4. Database Integration and Management

  • MongoDB Integration: Utilizes MongoDB for storing user credentials. The connection is managed efficiently, with provisions for clearing the database on startup if required.
  • Schema Definition: User data schema is defined using Mongoose, ensuring data integrity.

5. Logging and Monitoring

  • Logging: Winston is used for logging, providing an efficient way to track and record application behavior and errors, aiding in monitoring and debugging.

6. Testing

  • Endpoint Testing: Includes tests for endpoints using supertest to ensure that the API behaves as expected. Tests cover scenarios like successful user creation, login, and various input validation cases.

7. Containerization and Configuration

  • Docker Support: The microservice is containerized using Docker, simplifying deployment and environment consistency.
  • Environment Variable Management: Uses .env files for managing environment variables, allowing for flexible configuration.

8. Code Structure and Quality

  • Modular Code: The code is structured modularly, making it easy to understand, maintain, and expand.
  • Best Practices: Adheres to best practices in Node.js and Express.js development, ensuring a high-quality, maintainable codebase.

Integration and Usage

To integrate and use this microservice in your applications:

  1. Deploy the service using Docker, setting the required environment variables.
  2. Utilize the /signup and /login endpoints for user management.
  3. Implement the JWT middleware in other microservices for secure access.
  4. Adjust the rate limiting and other configurations as per your application's needs.