Node Cookbook

512 Pages·2020·13.787 MB·English

by  Bethany Griggs;

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A key technology for building web applications and tooling, Node.js brings JavaScript to the server o Cookbook
enabling full-stack development in a common language. This fourth edition of the Node Cookbook k
is updated with the latest Node.js features and the evolution of the Node.js framework ecosystems.
This practical guide will help you to get started with creating, debugging, and deploying your Fourth Edition
Node.js applications and cover solutions to common problems, along with tips to avoid pitfalls.
You'll become familiar with the Node.js development model by learning how to handle fi les and
build simple web applications and then explore established and emerging Node.js web frameworks
such as Express.js and Fastify. As you advance, you'll discover techniques for detecting problems
Discover solutions, techniques, and best practices
in your applications, handling security concerns, and deploying your applications to the cloud. This
recipe-based guide will help you to easily navigate through various core topics of server-side web for server-side web development with Node.js 14
application development with Node.js.
By the end of this Node book, you'll be well-versed with core Node.js concepts and have gained the
knowledge to start building performant and scalable Node.js applications.
Things you will learn:
• Understand the Node.js asynchronous • Discover tips for testing, optimizing,
programming model and securing your web applications
• Create simple Node.js applications • Create and deploy Node.js microservices
using modules • Debug and diagnose issues in your
• Develop simple web applications Node.js applications
using web frameworks such as
Express.js and Fastify
Bethany Griggs
Node Cookbook
Fourth Edition
Discover solutions, techniques, and best practices
for server-side web development with Node.js 14
Bethany Griggs
BIRMINGHAM—MUMBAI
Node Cookbook
Fourth Edition
Copyright © 2020 Packt Publishing
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Commissioning Editor: Ashwin Nair
Senior Editor: Sofi Rogers
Content Development Editor: Mrudgandha Kulkarni
Technical Editor: Shubham Sharma
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Indexer: Priyanka Dhadke
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First published: July 2012
Second edition: April 2014
Third edition: July 2017
Fourth edition: November 2020
Production reference: 1231120
Published by Packt Publishing Ltd.
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B3 2PB, UK.
ISBN 978-1-83855-875-8
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Contributors
About the author
Bethany Griggs is a senior software engineer at Red Hat and a Node.js Technical Steering
Committee member. Beth has been involved with the Node.js project since 2016 when she
joined IBM's Node.js runtime team. Now at Red Hat, she is continuing her work on Node.
js, including contributing to the Node.js project. Beth is an active member of the Node.
js Release Working Group, who audit the content for and produce Node.js releases. Her
other focuses include the creation of resources and tools to support Node.js deployments
to the cloud.
About the reviewer
Dennis Myasnyankin is experienced in creating web scrapers that utilize Python
and JavaScript to gather large amounts of data from various online resources. He has
extracted a wide range of data, including small business specifics, video-game reviews,
and travel agency contacts. Dennis has also sourced information through the scraping
of IMDB details, Zillow listings, and cruise line information from targeted domains.
Dennis has completed significant projects primarily through JavaScript, using the MERN
tech-stack for building dynamic web applications, and Node.js's Puppeteer library to
complete scraping tasks. He is interested in expanding his knowledge in other languages
and new technologies while creating meaningful solutions to real-world problems.
Packt is searching for authors like you
If you're interested in becoming an author for Packt, please visit authors.packtpub.
com and apply today. We have worked with thousands of developers and tech professionals,
just like you, to help them share their insight with the global tech community. You can make
a general application, apply for a specific hot topic that we are recruiting an author for, or
submit your own idea.

Table of Contents
Preface
1
Introducing Node.js 14
Technical requirements 2 Getting ready 6
Installing Node.js 14 with nvm 2 How to do it… 6
How it works… 12
Getting ready 2
There's more… 13
How to do it… 2
How it works… 4 Adopting new JavaScript syntax
There's more… 5 in Node.js 14 14
See also 5
Getting ready 14
Accessing the Node.js API How to do it… 15
documentation 5 How it works… 17
2
Handling I/O
Technical requirements 20 There's more 25
Handling standard I/O 20 See also 31
Getting ready 20 Inspecting file metadata 32
How to do it 20
Getting ready 32
How it works 22
How to do it 32
See also 22
How it works 34
Managing files with fs module 22 There's more 36
See also 39
Getting ready 23
How to do it 23 Watching for file updates 39
How it works 24
Getting ready 39
ii Table of Contents
How to do it 40 communication 43
How it works 41 Getting ready 43
See also 43 How to do it 44
How it works 45
Creating TCP server and client
There's more 47
3
Streams, Streams, Streams
Technical requirements 50 There's more… 67
Creating streams in Node.js 50 See also 67
Getting ready 51 Transforming data with
How to do it… 51 transform streams 67
How it works… 54
Getting ready 68
There's more… 58
How to do it… 69
See also 61
How it works… 70
Interacting with paused streams 62 There's more… 71
See also 74
Getting ready 62
How to do it… 62 Building stream pipelines 75
How it works… 64
Getting ready 75
See also 65
How to do it… 76
Piping streams 65 How it works… 78
There's more… 79
Getting ready 65
See also 80
How to do it… 66
How it works… 66
4
Using Web Protocols
Technical requirements 82 See also 86
Using http module to make
Building an HTTP server to
HTTP requests 82
accept GET requests 86
Getting ready 82
Getting ready 87
How to do it… 83
How to do it… 87
How it works… 85
How it works… 89
There's more… 86
Table of Contents iii
There's more… 91 Using ws to create a WebSocket
See also 91 server 106
Getting ready 107
Handling HTTP POST requests 91
How to do it… 107
Getting ready 92
How it works… 110
How to do it… 92
There's more… 110
How it works… 95
See also 112
There's more… 97
See also 99 Sending an automated email
using your own SMTP server 112
Using formidable to handle file
Getting ready 112
uploads 99
How to do it… 113
Getting ready 99
How it works… 114
How to do it… 100
There's more… 115
How it works… 103
See also 117
There's more… 104
See also 106
5
Developing Node.js modules
Technical requirements 120 How to do it 136
Consuming Node.js modules 121 How it works 138
There's more 139
Getting ready 121
See also 140
How to do it 121
How it works 123 Preparing and publishing your
There's more 127 module to npm 140
See also 130
Getting ready 140
Setting up your own module 130 How to do it 141
How it works 144
Getting ready 131
There's more 145
How to do it 131
How it works 134 Using ECMAScript modules 148
There's more 135
Getting ready 148
See also 135
How to do it 148
Implementing your module 136 How it works 150
See also 151
Getting ready 136