Rest API...How does it work?

# Web Site Writing Basics

# nodejs # RestApi # Drug sign with lemon8 # Trending

🌐 what is the REST API? The REST API, short for REpresentational State Transfer Application Programming Interface in a simple sense, is a set of architectural rules and principles for creating web services that allow two different software systems to communicate, exchange information with each other across the Internet in a standard way 🗝️. The core of RESTREST focuses on communication based on "resources," where each resource is identified by a unique Uniform Resource Locator (Resource) URL: is any information or anything the system needs to manage, such as users, users, products, words. Orders: When a Client (such as a web browser or a mobile application) requests a resource, the data is sent back in a form called "Representation," most often JSON (JavaScript Object Notation) or 🛠️ REST APIREST API. The principle of REST APIREST API uses the HTTP Protocol (Hypertext Transfer Protocol) as the basis for communication. It follows the Client-Server format and uses the "Verb" or HTTP Method to specify the action you want to do per that "resource." 1. The request (The Request) Method (the requester) sends the request for HTTP (the main resource) and the https://api.example.com/products/123HTTP the server (the server). HTTP Methods (CRUD Operations) Major HTTP Methods are used to perform CRUD (Create, Read, Update, Delete) on Resources: HTTP Execution Method (CRUD) Semantics Sample URI (Assume User Entry) GETRead Retrieve Resources from ServerGET / User (Retrieve All Users) or GET / User / 1 (Retrieve User ID 1) POSTCreate New Resource POST / User (Create New User) PUTUpdate Existing Resources Total PUT / User / 1 (Replace All User ID 1 Data) DELETEDelete Specified Resources DETE / User ID (Delete User 1) PATCHUpdate Available Resources Partial PATCH / user / 1 (just edit the name of user ID 1) 3. The Response Server will process the request and send back the HTTP reply to Client. It includes: Status Code: Status Code Numbers that tell you the result of the request. 200 OK: Successful 201 Created: Successfully Rebuilt Resources (Usually Used on POST) 400 Bad Request: Invalid Request404 Not Found: No Resources Found 500 Internal Server Error: ServerHeaders Error: Additional Information on ResponseBody (Payload): Information of Client's requested resources (such as JSON-format user data) 💡 Important limitations (Statelessness) The key principle of REST is Stateless. (Stateless) means: Server must not store any information about Client's previous requests. Each request must contain all the information needed to process this principle, making the API flexible and scalable. Because Server can handle requests from any Client without remembering what Client has done.