Book Image

Mastering Go - Second Edition

By : Mihalis Tsoukalos
Book Image

Mastering Go - Second Edition

By: Mihalis Tsoukalos

Overview of this book

Often referred to (incorrectly) as Golang, Go is the high-performance systems language of the future. Mastering Go, Second Edition helps you become a productive expert Go programmer, building and improving on the groundbreaking first edition. Mastering Go, Second Edition shows how to put Go to work on real production systems. For programmers who already know the Go language basics, this book provides examples, patterns, and clear explanations to help you deeply understand Go’s capabilities and apply them in your programming work. The book covers the nuances of Go, with in-depth guides on types and structures, packages, concurrency, network programming, compiler design, optimization, and more. Each chapter ends with exercises and resources to fully embed your new knowledge. This second edition includes a completely new chapter on machine learning in Go, guiding you from the foundation statistics techniques through simple regression and clustering to classification, neural networks, and anomaly detection. Other chapters are expanded to cover using Go with Docker and Kubernetes, Git, WebAssembly, JSON, and more. If you take the Go programming language seriously, the second edition of this book is an essential guide on expert techniques.
Table of Contents (20 chapters)
Title Page

Timing out HTTP connections

This section will present a technique for timing out network connections that take too long to finish. Remember that you already know such a technique from Chapter 10, Concurrency in Go – Advanced Topics, when we talked about the context standard Go package. This technique was presented in the useContext.go source code file.

The method that is going to be presented in this section is much easier to implement. The relevant code is saved in clientTimeOut.go and it is going to be presented in four parts. The utility accepts two command-line arguments, which are the URL and the timeout period in seconds. Please notice that the second parameter is optional.

The first part of the code portion for clientTimeOut.go is as follows:

package main 
import (