JWT authentication in Rust

JSON Web Tokens (JWTs) serve as a secure standard for representing claims between systems and are particularly useful in microservice architectures for stateless authorization. In these setups, JWTs can manage user state by mapping session tokens to JWTs upon login, allowing backend systems to authorize requests and distribute user information without repeated data fetching. This tutorial demonstrates implementing JWT-based authentication and authorization in a Rust web application using libraries such as warp for the web server, Serde for JSON handling, and jsonwebtoken for token management. The process involves creating a simple web server with endpoints that leverage JWTs for access control, ensuring that only authenticated users can access specific resources. It also highlights the importance of robust error handling to prevent security vulnerabilities and provides a practical guide to testing these mechanisms through a series of example requests. While this example is not production-ready, it showcases essential concepts and techniques for building a secure authentication system in Rust, reflecting the language's growing maturity in web services.