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

HTTP tracing

Go supports HTTP tracing with the help of the net/http/httptrace standard package. That package allows you to trace the phases of an HTTP request. So, the use of the net/http/httptrace standard Go package will be illustrated in httpTrace.go, which is going to be presented in five parts.

The first part of httpTrace.go is as follows:

package main 
import ( 

As you might expect, you need to import the net/http/httptrace package in order to enable HTTP tracing.

The second part of httpTrace.go contains the following Go code:

func main() { 
    if len(os.Args) != 2 { 
        fmt.Printf("Usage: URL\n") 
    URL := os.Args[1] 
    client := http.Client{} 

In this part, we read the command-line arguments and create...