Book Image

Accelerating Server-Side Development with Fastify

By : Manuel Spigolon, Maksim Sinik, Matteo Collina
5 (1)
Book Image

Accelerating Server-Side Development with Fastify

5 (1)
By: Manuel Spigolon, Maksim Sinik, Matteo Collina

Overview of this book

This book is a complete guide to server-side app development in Fastify, written by the core contributors of this highly performant plugin-based web framework. Throughout the book, you’ll discover how it fosters code reuse, thereby improving your time to market. Starting with an introduction to Fastify’s fundamental concepts, this guide will lead you through the development of a real-world project while providing in-depth explanations of advanced topics to prepare you to build highly maintainable and scalable backend applications. The book offers comprehensive guidance on how to design, develop, and deploy RESTful applications, including detailed instructions for building reusable components that can be leveraged across multiple projects. The book presents guidelines for creating efficient, reliable, and easy-to-maintain real-world applications. It also offers practical advice on best practices, design patterns, and how to avoid common pitfalls encountered by developers while building backend applications. By following these guidelines and recommendations, you’ll be able to confidently design, implement, deploy, and maintain an application written in Fastify, and develop plugins and APIs to contribute to the Fastify and open source communities.
Table of Contents (21 chapters)
Part 1:Fastify Basics
Part 2:Build a Real-World Project
Part 3:Advanced Topics

Authentication and authorization flow

Authentication and authorization are usually challenging topics. Based on use cases, specific strategies may or may not be feasible. For this project, we will implement the authentication layer via JSON Web Tokens, commonly known as JWTs.


This is a widely used standard for token-based authentication for web and mobile applications. It is an open standard that allows information to be transmitted securely between the client and the server. Every token has three parts. First, the header contains information about the type of token and the cryptographic algorithms used to sign and encrypt the token. Then, the payload includes any metadata about the user. Finally, the signature is used to verify the token’s authenticity and ensure it has not been tampered with.

Before looking at the implementation in Fastify, let’s briefly explore how this authentication works. First, the API needs to expose an endpoint for the registration...