Python 3网络编程基础教程第2版

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"Apress.Foundations.of.Python.3.Network.Programming.2nd.Edition" 《Python网络编程基础第二版》是一本由Brandon Rhodes和John Goerzen合著的专业指南，专注于使用Python构建网络应用。这本书是Python开发者深入理解网络编程的全面教程，涵盖了从基础到高级的各种主题。在Python网络编程领域，本书提供了详尽的指导，包括但不限于以下关键知识点： 1. **网络基础知识**：介绍网络通信的基本原理，如TCP/IP协议、HTTP协议以及DNS系统的工作机制，为后续的编程实践奠定理论基础。 2. **套接字编程**：讲解Python的socket模块，如何创建和使用套接字进行客户端和服务器之间的数据传输，包括TCP和UDP协议的使用。 3. **HTTP编程**：深入探讨如何使用Python处理HTTP请求和响应，包括使用urllib、requests等库来实现Web客户端功能，以及构建简单的Web服务器。 4. **Web服务开发**：介绍RESTful API的设计和实现，以及如何使用Python的Flask、Django等框架构建Web服务。 5. **并发与多线程**：讨论Python中的多线程和多进程模型，以及如何利用异步I/O（如asyncio）提高网络应用的并发性能。 6. **网络安全**：涵盖网络安全的基本概念，如加密、认证和授权，以及如何在Python中使用SSL/TLS进行安全通信。 7. **网络数据解析**：教授如何解析XML、JSON等常见网络数据格式，以及处理HTML和XML文档的库，如BeautifulSoup。 8. **网络调试与测试**：讲解如何调试网络应用，使用工具进行网络抓包，以及编写测试用例来确保代码质量。 9. **实战案例**：提供实际的项目示例，如聊天服务器、邮件客户端和网络爬虫，帮助读者将所学知识应用到实际场景中。 10. **最新技术更新**：第二版可能包含了Python 3的新特性和最佳实践，以及对最新网络库和技术的介绍。《Python网络编程基础第二版》是Python开发者深入网络编程领域的必备参考书，无论你是初学者还是有经验的开发者，都能从中获得丰富的知识和实践经验。通过学习本书，你将能够熟练地使用Python构建高效、可靠的网络应用程序。

■ CONTENTS

xiv

Talking About Objects: Pyro and RPyC ........................................................................ 316

An RPyC Example ........................................................................................................ 317

RPC, Web Frameworks, Message Queues .................................................................. 319

Recovering From Network Errors ................................................................................ 320

Binary Options: Thrift and Protocol Buffers ................................................................. 320

Summary ..................................................................................................................... 321

■Index ................................................................................................................. 323



xvii

Acknowledgements

This book owes its very existence to John Goerzen, whose work in writing the first edition of Foundations

of Python Network Programming indeed provided the foundation on which this volume has been built.

The excellent example he set by supplying complete, working example programs has guided me at every

step. Where his examples were not obsolete, I have worked to retain his source code so that it can benefit

another generation of readers.

The editorial team at Apress provided ample support during this experience—my first attempt at

revising something the length of an entire book—and the quality of the result is in large part thanks to

Laurin Becker’s gentle encouragement, Michael R. Bernstein’s very knowledgeable technical reviews,

and Matt Wade’s holding the rudder to keep each chapter on course. Michael’s reviews, in particular,

were a model of what an author needs: frequent encouragement when a chapter has gone well, tips and

links to more information when coverage of a topic is sketchy, and frank dismay when part of a chapter

has gone off the rails. Several parts of this book that will please readers will do so because their first draft

was not adequate, and Michael suggested the direction in which the chapter needed to move instead.

And, of course, the copy editors and layout people all did much work as well, and I want to thank Mary

Ann Fugate in particular for imposing her good taste about when to use “which” and when to use “that,”

which (that?) has produced much smoother English.

Every reader of this book should join me in thanking the Python core developers and the community

that has grown up around Python for every single tool, routine, and function referenced in this book.

And as John Goerzen did in the first edition’s acknowledgments, I want to express gratitude to the early

generations of programmers like Richard Stallman, who demonstrated that programming could be an

open, happy, and cooperative discipline that did not impose the physical world’s economics of scarcity

onto the world of freely copied programs. To those who prefer more negative forms of protest, I offer

Joss Whedon’s mantra about creativity: “The greatest expression of rebellion is joy.”

And, finally, I would like to thank my mother for letting me spend enough time in front of the computer

when I was growing up, and my father for raising me in a house with shelves of books about Unix. He

chose an AT&T 3B1 as our home computer. While other students in grade school were learning about the

abysmal world of DOS, I was learning about awk, C, and multi-processing—background that prepared

me to appreciate Python’s beauty the moment I saw it.

Brandon Craig Rhodes

Midtown Atlanta

19 November 2010

■ INTRODUCTION

xviii

Introduction

You have chosen an exciting moment in computing history to embark on a study of network

programming. Machine room networks can carry data at speeds comparable to those at which machines

access their own memory, and broadband now reaches hundreds of millions of homes worldwide. Many

casual computer users spend their entire digital lives speaking exclusively to network services; they are

only vaguely aware that their computer is even capable of running local applications.

This is also a moment when, after 20 solid years of growth and improvement, interest in Python

really seems to be taking off. This is different from the trajectory of other popular languages, many of

which experience their heyday and go into decline long before the threshold of their third decade. The

Python community is not only strong and growing, but its members seem to have a much better feel for

the language itself than they did a decade ago. The advice we can share with new Python programmers

about how to test, write, and structure applications is vastly more mature than what passed for Pythonic

design a mere decade ago.

Both networking and Python programming are large topics, and their intersection is a rich and

fertile domain. I wish you great success! Whether you just need to connect to a single network port, or

are setting out to architect a complex network service, I hope that you will remember that the Internet is

an ecosystem that remains healthy so long as individual programmers honor public protocols and

support interoperability so that solutions can grow, compete, and thrive.

Writing even the simplest network program inducts you into the grand tradition started by the

inventors of the Internet, and I hope you enjoy the tools and the power that they have placed in our

hands. I like the encouragement that John Goerzen, the author of the first edition of this book, gave his

readers in his own introduction: “I want this to be your lab manual—your guide for inventing things that

make the Internet better.”

Assumptions

This book assumes that you know how to program in Python, but does not assume that you know

anything about networking. If you have used something like a web browser before, and are vaguely

aware that your computer talks to other computers in order to display web pages, then you should be

ready to start reading this book.

This book targets Python versions 2.5, 2.6, and 2.7, and in the text I have tried to note any differences

that you will encounter between these three versions of Python when writing network code.

As of this writing, the Python 2 series is still the workaday version of the language for programmers

who use Python in production. In fact, the pinnacle of that line of language development—Python 2.7—

was released just a few months ago, and a second bugfix release is now in testing. Interest in the

futuristic Python 3 version of the language is still mostly limited to framework authors and library

maintainers, as they embark on the community's several-year effort to port our code over to the new

version of the language.

If you are entirely new to programming, then an Amazon search will suggest several highly rated

books that use Python itself to teach you the basics. A long list of online resources, some of which are

complete e-books, is maintained at this link: wiki.python.org/moin/BeginnersGuide/NonProgrammers.

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