Book Image

The Go Workshop

By : Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó
5 (2)
Book Image

The Go Workshop

5 (2)
By: Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó

Overview of this book

The Go Workshop will take the pain out of learning the Go programming language (also known as Golang). It is designed to teach you to be productive in building real-world software. Presented in an engaging, hands-on way, this book focuses on the features of Go that are used by professionals in their everyday work. Each concept is broken down, clearly explained, and followed up with activities to test your knowledge and build your practical skills. Your first steps will involve mastering Go syntax, working with variables and operators, and using core and complex types to hold data. Moving ahead, you will build your understanding of programming logic and implement Go algorithms to construct useful functions. As you progress, you'll discover how to handle errors, debug code to troubleshoot your applications, and implement polymorphism using interfaces. The later chapters will then teach you how to manage files, connect to a database, work with HTTP servers and REST APIs, and make use of concurrent programming. Throughout this Workshop, you'll work on a series of mini projects, including a shopping cart, a loan calculator, a working hours tracker, a web page counter, a code checker, and a user authentication system. By the end of this book, you'll have the knowledge and confidence to tackle your own ambitious projects with Go.
Table of Contents (21 chapters)
Free Chapter
1. Variables and Operators
2. Logic and Loops

Structured Data

Once you have requested data from a server, the data returned can come in various formats. For example, if you send a request to, it will return HTML data for the Packt website. While HTML data is useful for displaying websites, it isn't ideal for sending machine-readable data. A common data type used in web APIs is JSON. JSON provides a good structure for data that is both machine-readable and human-readable. Later, you will learn how to parse JSON and make use of it using Go.

Exercise 14.02: Using the HTTP Client with Structured Data

In this exercise, you will parse structured JSON data in Go. The server will return JSON data and you will use the json.Unmarshal function to parse the data and put it into a struct:

  1. Create a new directory, Exercise14.02, on your GOPATH. Within that directory, create two more directories, server and client. Then, within the server directory, create a file called server.go and write the following code: