RESTful Principles

An architectural style for designing networked applications that emphasizes resources, standard HTTP methods, and stateless interactions.

Internet4 min readConcept 15 of 35

What it is

REST (Representational State Transfer) is an architectural style for designing networked applications.

Unlike arbitrary HTTP endpoints (like RPC over HTTP) which often use varied, custom URL structures and rely heavily on GET/POST for all actions, REST emphasizes resource-based routing, standard HTTP methods (GET, POST, PUT, DELETE, PATCH), standard representations (like JSON), and stateless interactions.

Why it matters

It brings predictability and standardization to API design. Front-end developers consume APIs constantly; a REST API provides a predictable structure.

If a developer knows the resource is /users, they immediately know how to fetch (GET), create (POST), update (PUT/PATCH), and delete (DELETE) users without having to read extensive custom documentation. It beautifully decouples the client from the server.

How it works

**Resources & URIs:** Everything is a resource identified by a unique URI (e.g., /articles, /users/123).

**HTTP Methods:** Standard verbs represent actions to be performed on the resources (GET for read, POST for create, PUT/PATCH for update, DELETE for remove).

**Representations:** Resources are transferred in a standard format, most commonly JSON.

**Statelessness:** Every request contains all the information needed to execute it. The server does not store client context (like sessions) between requests.

Try it

Use the **Drag-and-Drop URL Builder**. Drag a Method block and an Endpoint block into the slots to construct a valid REST request. Don't put verbs in the URL!

URL Builder Simulator

1. Select HTTP Method

2. Select Endpoint Path

Constructed Request

METHOD/path
Select a method and a path to test your REST API design.

Check yourself

Pick an answer to lock it in, then read why. Getting one wrong is part of how it sticks.

  1. 1What is the primary focus of RESTful URIs compared to arbitrary HTTP endpoints?
  2. 2Which HTTP method is conventionally used to create a new resource in a RESTful API?
  3. 3What does 'statelessness' mean in the context of REST architecture?

Remember this

  • REST relies on Resources (Nouns) identified by URIs.
  • Use standard HTTP Methods (Verbs) to interact with resources.
  • REST is stateless; every request must contain all necessary context.

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