Book Image

The Go Workshop

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

The Go Workshop

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
1. Variables and Operators
2
2. Logic and Loops

How to Build a Basic Server

The simplest HTTP server that we can create is a Hello World server. This is a server that will return a simple message "Hello World" and will not do anything else. It is not very useful, but it is a starting point to see what Go default packages give us and is the basis for any other more complex server. The aim is to have a server that runs on a specific port on your machine's localhost and accepts any path under it. Accepting any path means that when you test the server with your browser, it will always return the "Hello World" message and a status code of 200. Of course, we could return any other message, but, for historical reasons, the simplest project you learn when you study programming is always some sort of software returning the message "Hello World". In this case, we will see how this can be done and then visualized in a normal browser, before perhaps being put on the internet and shared with billions of users...