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

Sending a Request to a Server

When you want to retrieve data from a web server, you send a GET request to the server. When sending a request, the URL will contain the information on the resource you want data from. The URL can be broken down into a few key parts. These include the protocol, the hostname, the URI, and the query parameters. The format of it looks like this:

Figure 14.1: URL format breakdown

In this example:

  • The Protocol tells the client how to connect to the server. The two most common protocols are HTTP and HTTPS. In this example, we have used https.
  • The Hostname is the address of the server we want to connect to. In this example, it is
  • The URI is the Uniform Resource Identifier (URI), and this tells the server the path to the resource we want. In this example, it is /downloads.
  • The Query Parameters tell the server of any additional information it needs. In this example, we have two parameters. These are filter...