RESTtyyli

RESTtyyli, also known as Representational State Transfer (REST), is an architectural style for designing networked applications. It relies on a stateless, client-server, cacheable communications protocol -- the HTTP. The RESTtyyli was first defined by Roy Fielding in his doctoral dissertation in 2000. It emphasizes scalability of component interactions, generality of interfaces, independent deployment of components, and intermediary components to reduce interaction latency, enforce security, and encapsulate legacy systems.

RESTtyyli uses standard HTTP methods to perform operations on resources. These methods include GET, POST, PUT, DELETE, and PATCH. Each method corresponds to a specific action: GET retrieves data, POST creates new data, PUT updates existing data, DELETE removes data, and PATCH partially updates data. Resources are identified by URIs (Uniform Resource Identifiers), which are used to access and manipulate the resources.

One of the key principles of RESTtyyli is statelessness, meaning that each request from a client to a server must contain all the information the server needs to fulfill that request. The server does not store any client context between requests. This simplifies the server design and improves scalability.

Another important aspect is the use of standard HTTP status codes to indicate the result of a request. For example, a 200 status code indicates a successful request, while a 404 status code indicates that the requested resource was not found.

RESTtyyli is widely used in web services and APIs due to its simplicity, scalability, and flexibility. It allows different systems to communicate over the web, making it a popular choice for building distributed systems and microservices architectures.