Book Image

Hands-On RESTful Web Services with ASP.NET Core 3

By : Samuele Resca

Book Image

Hands-On RESTful Web Services with ASP.NET Core 3

By: Samuele Resca

Overview of this book

In recent times, web services have evolved to play a prominent role in web development. Applications are now designed to be compatible with any device and platform, and web services help us keep their logic and UI separate. Given its simplicity and effectiveness in creating web services, the RESTful approach has gained popularity, and this book will help you build RESTful web services using ASP.NET Core. This REST book begins by introducing you to the basics of the REST philosophy, where you'll study the different stages of designing and implementing enterprise-grade RESTful web services. You'll also gain a thorough understanding of ASP.NET Core's middleware approach and learn how to customize it. The book will later guide you through improving API resilience, securing your service, and applying different design patterns and techniques to achieve a scalable web service. In addition to this, you'll learn advanced techniques for caching, monitoring, and logging, along with implementing unit and integration testing strategies. In later chapters, you will deploy your REST web services on Azure and document APIs using Swagger and external tools such as Postman. By the end of this book, you will have learned how to design RESTful web services confidently using ASP.NET Core with a focus on code testability and maintainability.

Preface

Who this book is for

What this book covers

To get the most out of this book

Free Chapter

Section 1: Getting Started

Section 1: Getting Started

REST 101 and Getting Started with ASP.NET Core

REST 101 and Getting Started with ASP.NET Core

Introducing ASP.NET Core

Preparing your development environment

Section 2: Overview of ASP.NET Core

Section 2: Overview of ASP.NET Core

Overview of ASP.NET Core

Overview of ASP.NET Core

Setting up our .NET Core project

Setting up an ASP.NET Core project

Working with the Middleware Pipeline

Working with the Middleware Pipeline

Introducing middleware

Understanding built-in middleware

Dependency Injection System

Dependency Injection System

Dependency inversion principle

Dependency injection in ASP.NET Core

Services life cycle

Web Service Stack in ASP.NET Core

Web Service Stack in ASP.NET Core

What is a controller?

Handling requests using controllers and actions

Data transfer objects

Implementing validation of requests

Routing System

Overview of the routing system

Conventional routing

Attribute routing

Routing constraints

Filter Pipeline

Filter Pipeline

Introduction to filters

Concrete filter implementations

Filter use cases

Section 3: Building a Real-World RESTful API

Section 3: Building a Real-World RESTful API

Building the Data Access Layer

Building the Data Access Layer

Setting up the project

Implementing the domain model

Data access using ORMs

Implementing a data access layer using EF Core

Testing the EF Core repository

Implementing a data access layer using Dapper

Implementing the Domain Logic

Implementing the Domain Logic

Implementing service classes

Testing the service layer

Implementing request model validation

Dependencies registration

Implementing the RESTful HTTP Layer

Implementing the RESTful HTTP Layer

Implementing the item controller

Testing controllers using the WebApplicationFactory<T> class

Improving the resilience of the API

Exposing related entities

A final overview

Advanced Concepts of Building an API

Advanced Concepts of Building an API

Implementing the soft delete procedure

Implementing HATEOAS

The asynchronous code in ASP.NET Core

Measure response time using middleware

The Containerization of Services

The Containerization of Services

An introduction to containers

Using Docker to run the catalog service

Optimizing Docker images

Service Ecosystem Patterns

Service Ecosystem Patterns

An introduction to the cart service

Implementing resilient communication using an HTTP client

Sharing events using an event bus

Running the cart service using Docker

Implementing Worker Services Using .NET Core

Implementing Worker Services Using .NET Core

Introducing worker services

Implementing a health-checking worker

Running a worker service on Docker

Consuming the sold-out event

Securing Your Service

Securing Your Service

Overview of secure communication

Securing APIs with token-based authentication

Section 4: Advanced Concepts for Building Services

Section 4: Advanced Concepts for Building Services

Caching Web Service Responses

Caching Web Service Responses

Introduction to the HTTP caching system

Implementing response caching in ASP.NET Core

Implementing a distributed cache

Logging and Health Checking

Logging and Health Checking

Logging in ASP.NET Core

Implementing the logging part

Implementing logging providers

Implementing a custom log provider in tests

Web service health check

Deploying Services on Azure

Deploying Services on Azure

Getting started with Azure

Pushing containers into Azure Container Registry

Configuring Azure Container Instances

Configuring app services

Documenting Your API Using Swagger

Documenting Your API Using Swagger

Understanding OpenAPI

Implementing OpenAPI in ASP.NET Core services

Testing Services Using Postman

Testing Services Using Postman

Overview of Postman

Importing a collection using OpenAPI

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Summary

In this chapter, we learned how to track the state of our services using logging. We also learned how to customize a logger provider and how to integrate it with an ASP.NET Core application. Furthermore, we dealt with the new health checking feature of ASP.NET Core and learned how to build a custom health check.

Now, you know how to implement logging in an ASP.NET Core application and create a custom logger provider. You will be able to use these skills to keep track of the data that's exposed by your services and monitor the status of your web service instance.

In the next chapter, we will learn how to bring our web service to the cloud using Azure.