Book Image

Building Python Web APIs with FastAPI

By : Abdulazeez Abdulazeez Adeshina
Book Image

Building Python Web APIs with FastAPI

By: Abdulazeez Abdulazeez Adeshina

Overview of this book

RESTful web services are commonly used to create APIs for web-based applications owing to their light weight and high scalability. This book will show you how FastAPI, a high-performance web framework for building RESTful APIs in Python, allows you to build robust web APIs that are simple and intuitive and makes it easy to build quickly with very little boilerplate code. This book will help you set up a FastAPI application in no time and show you how to use FastAPI to build a REST API that receives and responds to user requests. You’ll go on to learn how to handle routing and authentication while working with databases in a FastAPI application. The book walks you through the four key areas: building and using routes for create, read, update, and delete (CRUD) operations; connecting the application to SQL and NoSQL databases; securing the application built; and deploying your application locally or to a cloud environment. By the end of this book, you’ll have developed a solid understanding of the FastAPI framework and be able to build and deploy robust REST APIs.
Table of Contents (14 chapters)
Part 1: An Introduction to FastAPI
Part 2: Building and Securing FastAPI Applications
Part 3: Testing And Deploying FastAPI Applications

Chapter 2: Routing in FastAPI

Routing is an essential part of building a web application. Routing in FastAPI is flexible and hassle-free. Routing is the process of handling HTTP requests sent from a client to the server. HTTP requests are sent to defined routes, which have defined handlers for processing the requests and responding. These handlers are called route handlers.

By the end of this chapter, you will know how to create routes using the APIRouter instance and connect to the main FastAPI application. You will also learn what models are and how to use them to validate request bodies. You will also learn what path and query parameters are and how to use them in your FastAPI application. The knowledge of routing in FastAPI is essential in building small- and large-scale applications.

In this chapter, we’ll be covering the following topics:

  • Routing in FastAPI
  • The APIRouter class
  • Validation using Pydantic models
  • Path and query parameters
  • Request...