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Node.js RESTful API

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Node.js RESTful API

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Understanding RESTful APIs

REST (Representational State Transfer) is an architectural style for designing networked applications that has become the standard for web services. RESTful APIs provide a flexible, lightweight way to integrate applications and enable communication between different systems.

Core Concepts:

Resources:

Everything is a resource (user, product, order)

Representations:

Resources can have multiple representations (JSON, XML, etc.)

Stateless:

Each request contains all necessary information

Uniform Interface:

Consistent way to access and manipulate resources

RESTful APIs use HTTP requests to perform CRUD operations (Create, Read, Update, Delete) on resources, which are represented as URLs. REST is stateless, meaning each request from a client to a server must contain all the information needed to understand and process the request. Unlike SOAP or RPC, REST is not a protocol but an architectural style that leverages existing web standards like HTTP, URI, JSON, and XML.

Core REST Principles

Understanding these principles is crucial for designing effective RESTful APIs. They ensure your API is scalable, maintainable, and easy to use.

Key Principles in Practice:

Resource-Based:

Focus on resources rather than actions

Stateless:

Each request is independent and self-contained

Cacheable:

Responses define their cacheability

Uniform Interface:

Consistent resource identification and manipulation

Layered System:

Client doesn't need to know about the underlying architecture The core principles of REST architecture include:

Client-Server Architecture

: Separation of concerns between the client and the server

Statelessness

: No client context is stored on the server between requests

Cacheability

Formula

: Responses must define themselves as cacheable or non - cacheable

Layered System

: A client cannot tell whether it is connected directly to the end server

Uniform Interface

: Resources are identified in requests, resources are manipulated through representations, self-descriptive messages, and HATEOAS (Hypertext As The Engine Of Application State)

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