Course Content

Node.js Express: API & CLI Apps

1. Introduction

Backend Role in Web What is Node.js?Key Advantages of Node.js Installing Node.js Creating Your First Node.js App Challenge: First Node App "Introduction" Section Sum Up

2. Console Applications

Overview What are Console Applications?Introduction to the FileSystem Challenge: FileSystem Command Line Interface (CLI) Apps Commander Module Readline Module Console App: Guessing Game Working with Directories Console App: DirInspect Pro "Console Apps" Section Sum Up

3. Express.js Framework

Overview Role of Express.js in Web Development HTTP Requests Setting up an Express App Creating Routes Testing with Postman Middleware Built-in Middleware Custom Middleware "Express.js Framework" Section Sum Up

4. Developing REST API

Overview REST API Main Concepts Project Structure Setting Up the Entry Point Implementing the "GET ALL POSTS" Route Implementing the "GET POST BY ID" Route Implementing the "CREATE POST" Route Implementing the "UPDATE POST BY ID" Route Implementing the "DELETE POST BY ID" Route Starting and Testing the API Conclusion and Next Steps

Node.js Express: API & CLI Apps

REST API Main Concepts

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?

Everything was clear?

Section 4. Chapter 2

Course Content

Node.js Express: API & CLI Apps

1. Introduction

Backend Role in Web What is Node.js?Key Advantages of Node.js Installing Node.js Creating Your First Node.js App Challenge: First Node App "Introduction" Section Sum Up

2. Console Applications

3. Express.js Framework

4. Developing REST API

Node.js Express: API & CLI Apps

REST API Main Concepts

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?

🔍 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?

Everything was clear?

Section 4. Chapter 2