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

Dynamic Content

A server that serves only static content is useful, but there is much more that can be done. An HTTP server can deliver content depending on a more granular request, which is done by passing some parameters to the server. There are many ways to do so, but one simple way is to pass parameters to a querystring. If the URL of the server is:


We can then add something like:


Here, the part ?name=john is called a querystring as it is a string representing a query. In this case, this querystring sets a variable called name with a value of john. This way of passing parameters is generally used with GET requests, while a POST request will generally make use of the body of the request in order to send parameters. This does not mean that a GET request does not have a body but is not the standard way to pass parameters to a GET request. We will begin by looking at how to accept parameters for a GET request, as this...