Conteúdo do Curso

Backend Development with Node.js and Express.js

1. Introduction to Node.js and Backend Development

The Role of the Backend in Web Development What is Node.js?Key Advantages of Using Node.js Installing Node.js Creating Your First Node.js App Challenge: Build Your First Node App Key Takeaways

2. Building Console Applications with Node.js

Introduction to Console Applications in Node.js What are Console Applications?Working with the File System in Node.js Challenge: File System Operations Building Command Line Interface (CLI) Apps Using the Commander Module for CLI Apps Working with the Readline Module Building a Guessing Game Console App Managing Directories in Node.js Directory Inspection Tool Summary of Console Applications in Node.js

3. Developing Web Applications with Express.js

Introduction to Express.js in Web Development Why Use Express.js for Web Development?Understanding HTTP Requests Setting Up an Express.js Application Creating and Managing Routes in Express.js Testing APIs with Postman Introduction to Middleware in Express.js Using Built-in Middleware in Express.js Creating Custom Middleware Summary of Key Express.js Concepts

4. Building REST APIs with Node.js and Express.js

Introduction to REST API Development Core Concepts of REST APIs Setting Up the Project Structure Defining the Entry Point of the API Building the GET All Posts Endpoint Building the GET Post by Id Endpoint Building the CREATE Post Endpoint Building the UPDATE Post by Id Endpoint Building the DELETE Post by Id Endpoint Running and Testing the REST API Final Thoughts and Next Steps

Core Concepts of REST APIs

Let's dive deeper into what a REST API is and how it works, since we are about to build it. Understanding these fundamental concepts will lay a solid foundation for the rest of our project.

Plan

🤔 What is a REST API?
🔍 Key Principles of REST;
🤷‍♂️ How REST APIs Operate.

🤔 What is a REST API?

REST, or Representational State Transfer, is an architectural style for designing networked applications. REST APIs are a set of rules for creating and interacting with web services, facilitating seamless data exchange and operations across software systems.

🔍 Key Principles of REST

To grasp the essence of REST APIs, it's essential to remember these core principles:

Statelessness: In REST, each client and server interaction is self-contained. All the necessary information must be included in the request itself;
Resource-Centric: REST treats everything as a resource, uniquely identifying each resource by a URI (Uniform Resource Identifier). These resources interact through standard HTTP methods like GET, POST, PUT, and DELETE;
Representation: Resources in REST can have multiple representations, such as JSON or XML. This flexibility allows clients to choose their preferred format for data exchange.

🤷‍♂️ How REST APIs Operate

Now, let's take a closer look at how REST APIs operate. The process involves several key steps:

Request: Clients initiate requests by providing all necessary details within each request. This includes the HTTP method, URI, and required parameters or data;
Resource: The API processes the request based on the resource's unique URI. This URI serves as the address for the requested resource;
HTTP Methods: Standard HTTP methods determine the operation type to perform. For example, GET is used for retrieval, POST for creation, PUT for updating, and DELETE for removal;
Response: After processing the request, the server sends a response in the chosen representation format, typically JSON or XML. This response contains the requested data or confirmation of the action performed;
Statelessness: REST interactions are designed to be stateless, meaning no session data is stored between requests. Each request is independent and self-sufficient.

1. What does REST stand for?

2. In REST, how are resources uniquely identified?

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Seção 4. Capítulo 2