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. Variables and Operators
2. Logic and Loops

Getting Dynamic

Static assets are generally served as they are, but when you want to create a dynamic page, you might want to make use of an external template, which you can use on the fly, so that you can change the template without having to restart your server, or that you can load on startup, which means you will have to restart your server following any change (this is not strictly true, but we need some concepts of concurrent programming in order to make it happen). Loading a file at startup is executed simply for performance reasons. Filesystem operations are always the slowest, and even if Go is a fairly fast language, you might want to take performance into account when you want to serve your pages, especially if you have many requests from multiple clients.

As you will recall from a previous topic, we used the standard Go templates to make dynamic pages. Now, we can use the template as an external resource and put our template code in an HTML file and load it. The template...