Book Image

Mastering Minimal APIs in ASP.NET Core

By : Andrea Tosato, Marco Minerva, Emanuele Bartolesi
Book Image

Mastering Minimal APIs in ASP.NET Core

By: Andrea Tosato, Marco Minerva, Emanuele Bartolesi

Overview of this book

The Minimal APIs feature, introduced in .NET 6, is the answer to code complexity and rising dependencies in creating even the simplest of APIs. Minimal APIs facilitate API development using compact code syntax and help you develop web APIs quickly. This practical guide explores Minimal APIs end-to-end and helps you take advantage of its features and benefits for your ASP.NET Core projects. The chapters in this book will help you speed up your development process by writing less code and maintaining fewer files using Minimal APIs. You’ll also learn how to enable Swagger for API documentation along with CORS and handle application errors. The book even promotes ideas to structure your code in a better way using the dependency injection library in .NET. Finally, you'll learn about performance and benchmarking improvements for your apps. By the end of this book, you’ll be able to fully leverage new features in .NET 6 for API development and explore how Minimal APIs are an evolution over classical web API development in ASP.NET Core.
Table of Contents (16 chapters)
Part 1: Introduction
Part 2: What’s New in .NET 6?
Part 3: Advanced Development and Microservices Concepts

Architecting a minimal API project

Up to now, we have written route handlers directly in the Program.cs file. This is a perfectly supported scenario: with minimal APIs, we can write all our code inside this single file. In fact, almost all the samples show this solution. However, while this is allowed, we can easily imagine how this approach can lead to unstructured and therefore unmaintainable projects. If we have fewer endpoints, it is fine – otherwise, it is better to organize our handlers in separate files.

Let’s suppose that we have the following code right in the Program.cs file because we have to handle CRUD operations:

app.MapGet("/api/people", (PeopleService peopleService) => 
            { });
app.MapGet("/api/people/{id:guid}", (Guid id, PeopleService 
             peopleService) => { });