Book Image

Accelerating Server-Side Development with Fastify

By : Manuel Spigolon, Maksim Sinik, Matteo Collina
Book Image

Accelerating Server-Side Development with Fastify

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

Understanding the validation process

The validation process in Fastify follows the same logic to validate the incoming HTTP request parts. This business logic comprises two main steps, as we saw in Figure 5.2:

  • The schema compilation executed by the Validator Compiler
  • The validation execution

We will discuss these aspects one by one.

The validator compiler

Fastify doesn’t implement a JSON Schema interpreter itself. Still, it has integrated the Ajv ( module to accomplish the validation process. The Ajv integration into Fastify is implemented to keep it as fast as possible and support the encapsulation as well. You will always be able to change the default settings and provide a new JSON Schema interpreter to the application, but we will learn how to do it later, in the Managing the validator compiler section.

Ajv version

Fastify has included the Ajv module version 8. This is important to know when you need to search...