Learn how to build web apps and web APIs using Swift and the Vapor 4 framework!
If you’re a beginner to web development, but have worked with Swift for some time, you’ll find it’s easy to create robust, fully featured web apps and web APIs with Vapor 4.
Whether you’re looking to create a backend for your iOS app, or want to create fully-featured web apps, Vapor is the perfect platform for you.
This book starts with the basics of web development and introduces the basics of Vapor; it then walks you through creating APIs and web backends; creating and configuring databases; deploying to Heroku, AWS, or Docker; testing your creations and more!
Before You Begin
This section tells you a few things you need to know before you get started, such as what you’ll need for hardware and software, where to find the project files for this book, and more.
This section teaches you the beginnings of building Vapor applications, including how to use Swift Package Manager. You’ll learn how routing works and how Vapor leverages the power of Swift to make routing type-safe. You’ll learn how to create models, set up relationships between them and save them in a database. You’ll see how to provide an API to access this data from a REST client. Finally, you’ll build an iOS app which leverages this API to allow users to display and interact with the data.
Before you begin your journey with Vapor, you’ll first review the fundamentals of how the web and HTTP operate, including its methods and most common response codes. You’ll also learn how Vapor differs from other Swift frameworks, its benefits, and how it can augment your web development experience.
In this chapter, you’ll learn about asynchronous and non-blocking architectures. You’ll discover Vapor’s approach to these architectures and how to use them. Finally, the chapter provides a small overview of SwiftNIO, a core technology used by Vapor.
This chapter explains how to use Fluent to save data in Vapor applications. Fluent is Vapor’s ORM or object relational mapping tool. It’s an abstraction layer between the Vapor application and the database, and it’s designed to make working with databases easier.
Databases allow you to persist data in your applications. In this chapter you’ll learn how to configure your Vapor application to integrate with the database of your choice. Currently Vapor only has support for relational (SQL) databases but this will change in the future.
This chapter concentrates on how to interact with models in the database. You’ll learn about CRUD (Create, Retrieve, Update, Delete) operations and how they relate to REST APIs. You’ll also see how to leverage Fluent to perform complex queries on your models.
In previous chapters, you wrote all the route handlers in one file. This isn’t sustainable for large projects as the file quickly becomes too big and cluttered. This chapter introduces the concept of controllers to help manage your routes and models, using both basic controllers and RESTful controllers.
In this chapter, you’ll learn how to write tests for your Vapor applications. You’ll learn why testing is important and how it works with Swift Package Manager. Then, you’ll learn how to write tests for the TIL application from the previous chapters. Finally, you’ll see why testing matters on Linux and how to test your code on Linux using Docker.
In the previous chapters, you created an API and interacted with it using RESTed. However, users expect something a bit nicer to use TIL! The next two chapters show you how to build a simple iOS app that interacts with the API. In this chapter, you’ll learn how to create different models and get models from the database.
In this chapter, you’ll expand the app to include viewing details about a single acronym. You’ll also learn how to perform the final CRUD operations: edit and delete. Finally, you’ll learn how to add acronyms to categories.
Section II: Making a Simple Web App
This section teaches you how to build a front-end web site for your Vapor application. You’ll learn to use Leaf, Vapor’s templating engine, to generate dynamic web pages to display your app’s data. You’ll also learn how to accept data from a browser so that users can create and edit your models.
This section will provide you the necessary building blocks to build a full website with Vapor.
In this chapter, you'll learn how to use Leaf, Vapor's templating language, to make simple and dynamic websites using Vapor. Leaf allows you to pass information to a webpage so it can generate the final HTML without knowing everything up front.
In this chapter, you'll learn how to allow users to add categories to acronyms in a user-friendly way.
Section III: Validation, Users & Authentication
This section shows you how to protect your Vapor application with authentication. You’ll learn how to add password protection to both the API and the website, which lets you require users to log in. You’ll learn about different types of authentication: HTTP Basic authentication and token-based authentication for the API, and cookie- and session-based authentication for the web site.
Finally, you’ll learn how to integrate with Google, Github and Apple’s OAuth providers. This allows you to delegate authentication and allow users to utilize their Google, Github or Apple account credentials to access your site.
These chapters will allow you to secure your important routes and keep only allowed routes as unauthenticated. You’ll also learn how to delegate the authentication duties to third party vendors while still keeping your application secure.
In this chapter, you’ll learn how to protect your API with authentication. You’ll learn how to implement both HTTP basic authentication and token authentication in your API. You’ll also learn best practices for storing passwords and authenticating users.
Learn how to integrate Sign in with Apple with your Vapor app to use both with iOS and the website.
Section IV: Advanced Server-Side Swift
This section covers a number of different topics you may need to consider when developing server-side applications. These chapters will provide you the necessary building blocks to continue on your Vapor adventure and build even more complex and wonderful applications.
The chapters in this section deal with more advanced topics for Vapor and were written by the Vapor Core Team members. These include the use of Caching, Middleware and how to version your database / api including performing migrations.
You’ll lean more advanced features of Fluent such as saving models with enums, using Fluent’s soft delete and timestamp features and learn how to use raw SQL and joins.
Section V: Production & External Deployment
This section shows you how to deploy your Vapor application to external Cloud-based providers to offload the job of hosting your application. You’ll learn how to upload to Heroku, a popular platform for deploying applications as well as deploying to AWS or Docker.
The chapters in this section deal with hosting and production concerns when deploying your Vapor application and how to split your application into multiple services (microservices) to balance the load on your application.