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)
14
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15
Index

The net/http package

The net/http package offers functions that allow you to develop web servers and clients. For example, http.Get() and http.NewRequest() are used by clients for making HTTP requests, whereas http.ListenAndServe() is used for starting web servers by specifying the IP address and the TCP port the server listens to. Additionally, http.HandleFunc() defines supported URLs as well as the functions that are going to handle these URLs.

The next three subsections describe three important data structures of the net/http package—you can use these descriptions as a reference while reading this chapter.

The http.Response type

The http.Response structure embodies the response from an HTTP request—both http.Client and http.Transport return http.Response values once the response headers have been received. Its definition can be found at https://golang.org/src/net/http/response.go:

type Response struct {
    Status     string // e.g. "200 OK&quot...