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

Understanding responses in FastAPI

Responses are an integral part of an API’s life cycle. Responses are the feedback received from interacting with an API route via any of the standard HTTP methods. An API response is usually in JSON or XML format, but it can also be in the form of a document. A response consists of a header and a body.

What is a response header?

A response header consists of the request's status and additional information to guide the delivery of the response body. An example of the information contained in the response header is Content-Type, which tells the client the content type returned.

What is a response body?

The response body, on the other hand, is the data requested from the server by the client. The response body is determined from the Content-Type header variable and the most commonly used one is application/json. In the previous chapter, the list of to-dos returned is the response body.

Now that you’ve learned what responses...