掌握Twisted网络编程2.0：实战构建高效应用

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"《Twisted网络编程基础2版》是一本介绍使用Python编写的事件驱动网络框架Twisted的入门指南。作者是Jessica McKellar和Abe Fettig。这本书旨在帮助读者掌握关键概念和设计模式，构建基于各种流行网络协议的客户端和服务器应用程序，如TCP、HTTP、IRC、邮件和SSH等。全书共分三部分：第一部分介绍了Twisted的基本概念，包括基本的TCP客户端和服务器的构建；第二部分讲解如何部署生产级别的Twisted服务，涉及日志管理、数据库访问、身份验证、多线程和进程、以及测试等实用技巧；第三部分则深入探讨了构建更多复杂协议和实践应用的方法。书中详细讲解了核心组件，如使用Deferred API编写异步代码，利用Twisted的高级Web API构建HTTP服务器，以及如何使用Agent API开发灵活的Web客户端。此外，还着重介绍了如何标准化地配置和部署Twisted服务，以及如何利用非阻塞接口与数据库交互。对于熟悉Python的读者来说，这是一本理想的指南，它不仅适合初学者，也适合有一定经验的开发者进一步提升他们的网络编程技能。《Twisted网络编程基础2版》共有194页，由O'Reilly Media出版，第二版于2013年3月发行。书中包含丰富的实例和实战项目，有助于读者在实践中理解和掌握Twisted框架。该书提供英文版，并提供在线电子版供读者选择。对于任何想要深入了解和使用Twisted进行网络编程的人来说，这本书是一个不可多得的资源。"

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What You’ll Need

This book assumes a familiarity with programming in Python. If you

’re looking for a

good introduction to Python, check out Learning Python, by Mark Lutz (O’Reilly), or

Dive Into Python, by Mark Pilgrim (Apress). You should have a Linux, Mac OS X, or

Windows computer with Python version 2.6 or 2.7 installed. Python 2.6 is included in

Mac OS X 10.6 (“Snow Leopard”) and higher and in many Linux distributions. If you

don’t already have Python installed, you can download it for free from the Python home

page.

Changes Since the Previous Edition

The first edition of Twisted Networking Essentials was released in 2005. Since then,

networking protocols have come in and out of fashion, and Twisted’s APIs have evolved

and matured. This second edition builds upon the excellent foundation first edition

author Abe Fettig crafted by trimming off aged protocols and Twisted APIs and covering

more Twisted subprojects and features.

In particular, this edition removes the chapter on NNTP and adds chapters on building

IRC clients and servers and testing your Twisted applications using the Trial framework.

The sections on deploying production-grade services using the Twisted application in‐

frastructure have been significantly expanded. In addition to a discussion and examples

of Twisted applications and Twisted plugins, logging, working with databases, and using

threads and processes all now get more coverage in their own chapters.

xvi | Preface

The focus of this book has also been sharpened to give you fluency in Twisted’s primitives

and idioms with minimal distraction from the nitty-gritty details of specific protocols.

Almost all of the exam

ples have been streamlined, and where reasonable, reworked so

that you have client and server pairs that can be run together to maximize experimen‐

tation value. Also, as part of building a solid conceptual foundation, the section on

Deferreds, a frequent source of confusion and frustration for developers new to event-

driven programming, has been expanded into its own chapter with many more

examples.

Since the structure and many of the examples have changed, it is hard to give a short

and complete enumeration of the differences between this edition and the last. I hope

this has given you some idea, though, and I welcome your thoughts and feedback.

Portions of Chapters 2, 3, and 6 were adapted from the author’s chapter on Twisted for

The Architecture of Open Source Applications, Volume II under a Creative Commons

Attribution 3.0 Unported license. You can find out more about this book at The Archi‐

tecture of Open Source Applications home page and about this license at the Creative

Commons website.

Using Code Examples

This book is here to help you get your job done. In general, if this book includes code

examples, you may use the code in your programs and documentation. You do not need

to contact us for permission unless you’re reproducing a significant portion of the code.

For example, writing a program that uses several chunks of code from this book does

not require permission. Selling or distributing a CD-ROM of examples from O’Reilly

books does require permission. Answering a question by citing this book and quoting

example code does not require permission. Incorporating a significant amount of ex‐

ample code from this book into your product’s documentation does require permission.

We appreciate, but do not require, attribution. An attribution usually includes the title,

author, publisher, and ISBN. For example: “Twisted Network Programming Essentials,

McKellar, 978-1-4493-2611-1.”

If you feel your use of code examples falls outside fair use or the permission given above,

feel free to contact us at permissions@oreilly.com.

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Safari Books Online (www.safaribooksonline.com) is an on-demand

digital librar

y that delivers expert content in both book and video

form from the world’s leading authors in technology and business.

Preface | xvii

Technology professionals, software developers, web designers, and business and crea‐

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How to Contact Us

Please address comments and questions concerning this book to the publisher:

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Acknowledgments

Twisted was my first-ever experience with open source contribution. I am so grateful

that as a naive and clueless intern way back when, Glyph, JP, Itamar, and others patiently

guided me through the contribution process and invested their time in making me a

core developer for the project. What I’ve learned from this wonderful community

xviii | Preface

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