Book Image

Mastering Go – Third Edition - Third Edition

By : Mihalis Tsoukalos
5 (2)
Book Image

Mastering Go – Third Edition - Third Edition

5 (2)
By: Mihalis Tsoukalos

Overview of this book

Mastering Go is the essential guide to putting Go to work on real production systems. This freshly updated third edition includes topics like creating RESTful servers and clients, understanding Go generics, and developing gRPC servers and clients. Mastering Go was written for programmers who want to explore the capabilities of Go in practice. As you work your way through the chapters, you’ll gain confidence and a deep understanding of advanced Go concepts, including concurrency and the operation of the Go Garbage Collector, using Go with Docker, writing powerful command-line utilities, working with JavaScript Object Notation (JSON) data, and interacting with databases. You’ll also improve your understanding of Go internals to optimize Go code and use data types and data structures in new and unexpected ways. This essential Go programming book will also take you through the nuances and idioms of Go with exercises and resources to fully embed your newly acquired knowledge. With the help of Mastering Go, you’ll become an expert Go programmer by building Go systems and implementing advanced Go techniques in your projects.
Table of Contents (17 chapters)
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Developing a TCP server

This section presents two ways of developing a TCP server that can interact with TCP clients, just as we did with the TCP client.

Developing a TCP server with net.Listen()

The TCP server presented in this section, which uses net.Listen(), returns the current date and time to the client in a single network packet. In practice, this means that after accepting a client connection, the server gets the time and date from the operating system and sends that data back to the client. The net.Listen() function listens for connections, whereas the net.Accept() method waits for the next connection and returns a generic Conn variable with the client information. The code of tcpS.go is as follows:

package main
import (
func main() {
    arguments := os.Args
    if len(arguments) == 1 {
        fmt.Println("Please provide...