Book Image

Hands-On RESTful Web Services with TypeScript 3

By : Biharck Muniz Araújo
5 (1)
Book Image

Hands-On RESTful Web Services with TypeScript 3

5 (1)
By: Biharck Muniz Araújo

Overview of this book

In the world of web development, leveraging data is the key to developing comprehensive applications, and RESTful APIs help you to achieve this systematically. This book will guide you in designing and developing web services with the power of TypeScript 3 and Node.js. You'll design REST APIs using best practices for request handling, validation, authentication, and authorization. You'll also understand how to enhance the capabilities of your APIs with ODMs, databases, models and views, as well as asynchronous callbacks. This book will guide you in securing your environment by testing your services and initiating test automation with different testing approaches. Furthermore, you'll get to grips with developing secure, testable, and more efficient code, and be able to scale and deploy TypeScript 3 and Node.js-powered RESTful APIs on cloud platforms such as the Google Cloud Platform. Finally, the book will help you explore microservices and give you an overview of what GraphQL can allow you to do. By the end of this book, you will be able to use RESTful web services to create your APIs for mobile and web apps and other platforms.
Table of Contents (20 chapters)
Free Chapter
Section 1: Unraveling API Design
Section 2: Developing RESTful Web Services
Section 3: Enhancing RESTful Web Services
Section 4: Extending the Capabilities of RESTful Web Services

Introduction to GraphQL

As we mentioned at the beginning of this chapter, GraphQL is an interesting technique that provides a query language for APIs. We can apply this to existing data to fulfil any queries that are requested. A key factor of GraphQL is that it provides an interesting and understandable description of the data that comes from an API. This strategy enables clients to ask for exactly what they need and nothing more. So, if, as a requester, I just want two fields, why should I receive a ton of unnecessary information? GraphQL makes the API easier to adapt to the current situation.

It is really recommended that you take a look at the GraphQL web page to learn more:

In summary, a GraphQL service is composed of the following:

  • Defining types and fields on those types
  • Providing functions for each field on each type

Taking the example from the...