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

Challenge: File System Operations

🏆 Challenge

🎯 Goal

Master the art of task management automation! Your mission is to develop an application that gathers tasks from one source, extracts their content, and integrates them into another file. Your solution should also handle any potential errors along the way.

📋 Task

Imagine you have two files: tasks.txt, which contains a list of existing tasks, and new-task.txt, which includes a single task that must be added to the tasks.txt file.

Follow these steps to complete the challenge and create the real deal on your machine:

Prepare Your Workspace: Start by creating a new folder on your machine and open it using your favorite code editor.
Setup Tasks: Create the tasks.txt file and populate it with the following tasks or use the provided tasks.txt file:
- Teach a goldfish 🐠 to play chess ♟️;
- Build a sandcastle 🏰 in your living room 🛋️;
- Create a song 🎶 using only sounds from nature 🌿.
Define New Task: Create the new-task.txt file and insert the following task or use the provided new-task.txt file:
- Invent a new dance move and perform it in public. 💃🕺.
Main Script: Craft the app.js file, which will serve as the heart of your application.
- Import fs Module: Begin by importing the fs module to enable file handling within your application;
- Read Content: Utilize the readFile function from the fs module to extract the content from the new-task.txt file. Be sure to implement .then() and .catch() to manage both success and error scenarios;
- Append Content: Inside the .then() block, once the content is successfully read, employ the appendFile function to add the content to the tasks.txt file. Don't forget to append a newline character (\n) after the content.
Run the Magic: Save your app.js file and execute it using Node.js in the terminal with the command node app.

If you prefer to use the code editor below, keep in mind that it does not recognize your files and will not show your progress.


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const fs = require("fs").___;

fs.___("new-task.txt", "utf-8")
  .then(___ => {
    return fs.___("tasks.txt", ___ + ___);
  })
  .___((error) => {
    console.log("Error:", error);
  });

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Seção 2. Capítulo 4