Go语言网络编程：构建与安全

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"《Network Programming with Go: Essential Skills for Using and Securing Networks》是由Jan Newmarch撰写的一本关于使用Go语言进行网络编程的专业书籍，适用于已有Go语言基础的程序员。书中涵盖了网络架构、Go语言基础，以及最新的Go语言版本特性。" 在本书中，读者将学习到以下关键知识点： 1. **Go语言网络编程基础**：通过深入学习Go语言在网络编程中的应用，了解如何利用Go的强大功能构建高效、可靠的网络程序。 2. **数据序列化**：探讨不同数据类型如何转换为可以在网络上传输的格式，如JSON、XML等，以及如何在接收端进行反序列化处理。 3. **应用层协议**：理解如TCP、UDP等底层网络协议之上，HTTP、FTP、SMTP等应用层协议的工作原理，以及如何在Go中实现这些协议。 4. **字符集与编码**：了解Unicode、ASCII等字符编码系统，以及在Go中处理多语言字符集的方法，确保数据在网络中的正确传输和显示。 5. **HTTP与HTTPS**：学习如何使用Go构建和处理HTTP和HTTPS请求，包括创建服务器和客户端，实现安全的网络通信。 6. **远程过程调用（RPC）**：掌握Go中的RPC框架，实现跨网络的服务调用，提升程序间的通信效率。 7. **WebSocket**：包括HTML5 WebSocket协议的实现，构建实时、双向的网络通信，为Web应用提供低延迟的交互体验。 8. **网络安全**：探讨网络编程中的安全问题，如何预防和应对攻击，如SSL/TLS加密，防止中间人攻击等。 9. **构建完整的Go Web服务器**：跟随作者的指导，实际动手搭建一个基于Go的Web服务器，理解网络服务的完整生命周期。这本书适合已经有一定Go语言经验的开发者，无论是想要提升网络编程技能，还是专注于网络服务的安全性，都能从中受益。通过实例和详尽的解释，读者不仅可以掌握理论知识，还能获得实践操作的经验，成为Go语言网络编程的专家。

xvii

About the Author

Jan Newmarch is head of ICT (higher education) at Box Hill Institute, adjunct

professor at Canberra University, and adjunct lecturer in the School of

Information Technology, Computing and Mathematics at Charles Sturt

University. He is interested in more aspects of computing than he has time to

pursue, but the major thrust over the last few years has developed from user

interfaces under UNIX into Java, the Web, and then into general distributed

systems. Jan developed a number of publicly available software systems in

these areas. For the last few years, he has been looking at sound for Linux

systems and programming the Raspberry Pi’s GPU. He is now exploring

aspects of the IoT. He lives in Melbourne, Australia and enjoys the food and

culture there, but is not so impressed by the weather.

xxi

Preface

It’s always fun to learn a new programming language, especially when it turns out to be a major one. Prior

to the release of Go in 2009, I was teaching a Master’s level subject in network programming at Monash

University. It’s good to have a goal when learning a new language, but this time, instead of building yet

another wine cellar program, I decided to orient my lecture notes around Go instead of my (then) standard

delivery vehicle of Java.

The experiment worked well: apart from the richness of the Java libraries that Go was yet to match, all

the programming examples transferred remarkably well, and in many cases were more elegant than the

original Java programs.

This book is the result. I have updated it as Go has evolved and as new technologies such as HTTP/2

have arisen. But if it reads like a textbook, well, that is because it is one. There is a large body of theoretical

and practical concepts involved in network programming and this book covers some of these as well as the

practicalities of building systems in Go.

In terms of language popularity, Go is clearly rising. It has climbed to 16th in the TIOBE index, is 18th

in the PYPL (Popularity of Programming Language), and is 15th in the RedMonk Programming Language

rankings. It is generally rated as one of the fastest growing languages.

There is a growing community of developers both of the core language and libraries and of the

independent projects. I have tried to limit the scope of this book to the standard libraries only and to the

“sub-repositories” of the Go tree. While this eliminates many excellent projects that no doubt make many

programming tasks easier, restricting the book to the official Go libraries provides a clear bound.

This book assumes a basic knowledge of Go. The focus is on using Go to build network applications,

not on the basics of the language. Network applications are different than command-line applications,

are different than applications with a graphical user interface, and so on. So the first chapter discusses

architectural aspects of network programs. The second chapter is an overview of the features of Go that we

use in this book. The third chapter on sockets covers the Go version of the basics underlying all

TCP/IP systems. Chapters 4, 5, and 6 are more unusual in network programming books. They cover the

topics of what representations of data will be used, how a network interaction will proceed, and for text,

which language formats are used. Then in Chapter 7, we look at the increasingly important topic of security.

In Chapter 8, we look at one of the most common application layer protocols in use, HTTP. The next four

chapters are about topics related to HTTP and common data formats carried above HTTP—HTML and

XML. In Chapter 13, we look at an alternative approach to network programming, remote procedure calls.

Chapters 14 and 15 consider further aspects of network programming using HTTP.

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Go语言网络编程：构建与安全

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