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 request and reply lifecycle

When executing a Fastify server application, the vast majority of the time is spent in the request-reply cycle. As developers, we define routes that the clients will call and produce a response based on the incoming conditions. In true Fastify philosophy, we have several events at our disposal to interact with this cycle. As usual, they will be triggered automatically by the framework only when needed. These hooks are fully encapsulated so that we can control their execution context with the register method.

As we saw in the previous section, we had four application hooks. Here, we have nine request and reply hooks:

  • onRequest
  • preParsing
  • preValidation
  • preHandler
  • preSerialization
  • onSend
  • onResponse
  • onError
  • onTimeout

Since they are part of the request/reply cycle, the trigger order of these events is crucial. Therefore, the first seven elements of the list are written from the first to the last...