What are the principles of REST?

REST (Representational State Transfer) is an architectural style for creating web services based on several key principles:

• Client-server architecture: separation of user interface and data storage for independent development.
• Stateless: each request from the client to the server must contain all the necessary information; the server does not store state between requests.
• Caching: responses should explicitly indicate whether they can be cached to improve performance.
• Uniform interface: standardized interaction methods (e.g., HTTP methods GET, POST, PUT, DELETE).
• Layered system: architecture can consist of multiple layers that do not know about the layers above or below.
• Code on demand (optional): the server can transfer executable code to the client (e.g., scripts) to extend functionality.

These principles ensure simplicity, scalability, and flexibility of RESTful services.