Book Image

Node.js Web Development - Fifth Edition

By : David Herron
Book Image

Node.js Web Development - Fifth Edition

By: David Herron

Overview of this book

Node.js is the leading choice of server-side web development platform, enabling developers to use the same tools and paradigms for both server-side and client-side software. This updated fifth edition of Node.js Web Development focuses on the new features of Node.js 14, Express 4.x, and ECMAScript, taking you through modern concepts, techniques, and best practices for using Node.js. The book starts by helping you get to grips with the concepts of building server-side web apps with Node.js. You’ll learn how to develop a complete Node.js web app, with a backend database tier to help you explore several databases. You'll deploy the app to real web servers, including a cloud hosting platform built on AWS EC2 using Terraform and Docker Swarm, while integrating other tools such as Redis and NGINX. As you advance, you'll learn about unit and functional testing, along with deploying test infrastructure using Docker. Finally, you'll discover how to harden Node.js app security, use Let's Encrypt to provision the HTTPS service, and implement several forms of app security with the help of expert practices. With each chapter, the book will help you put your knowledge into practice throughout the entire life cycle of developing a web app. By the end of this Node.js book, you’ll have gained practical Node.js web development knowledge and be able to build and deploy your own apps on a public web hosting solution.
Table of Contents (19 chapters)
1
Section 1: Introduction to Node.js
6
Section 2: Developing the Express Application
12
Section 3: Deployment

Creating an Express application to compute Fibonacci numbers

As we discussed in Chapter 1, About Node.js we'll be using an inefficient algorithm to calculate Fibonacci numbers to explore how to mitigate performance problems, and along the way, we'll learn how to build a simple REST service to offload computation to the backend server.

The Fibonacci numbers are the following integer sequence:

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...

Each Fibonacci number is the sum of the previous two numbers in the sequence. This sequence was discovered in 1202 by Leonardo of Pisa, who was also known as Fibonacci. One method to calculate entries in the Fibonacci sequence is using the recursive algorithm, which we discussed in Chapter 1, About Node.js. We will create an Express application that uses the Fibonacci implementation and along the way, we will get a better understanding of Express applications, as well as explore several methods to mitigate performance problems in computationally intensive...