XMPP即时通信协议实战指南

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Xmpp 详细指导 XMPP（Extensible Messaging and Presence Protocol，扩展消息和存在协议）是一种基于XML的开放式即时通信协议，用于实时消息传递和在线状态共享。XMPP 协议允许用户在不同的服务器之间交换消息和状态信息，从而实现了跨平台的即时通信。 XMPP 的主要组件包括： 1. 服务器（Server）：负责管理用户账户、消息传递和状态共享的中心节点。 2. 客户端（Client）：用户使用的应用程序，用于与服务器通信和交换消息。 3. 节点（Node）：XMPP 网络中的一个实体，可能是一个服务器、客户端或其他类型的节点。 XMPP 协议的主要特点包括： 1. extensibility：XMPP 协议允许开发者根据需要添加新的功能和协议扩展。 2. flexibility：XMPP 协议支持多种类型的消息和状态共享，包括文本、音频、视频等。 3. scalability：XMPP 协议能够支持大量用户和服务器，满足大规模的即时通信需求。 XMPP 协议的应用场景包括： 1. 即时通信：XMPP 协议广泛应用于即时通信领域，如Google Talk、Skype 等。 2. 社交媒体：XMPP 协议用于社交媒体平台上的实时通信和状态共享。 3. 游戏开发：XMPP 协议用于游戏中的实时通信和状态共享，例如在线游戏中的聊天功能。《XMPP：The Definitive Guide》一书详细介绍了 XMPP 协议的技术细节和应用场景，对于想对 XMPP 有所了解的人来说是一本非常有价值的参考书籍。在本书中，作者 Peter Saint-Andre、Kevin Smith 和 Remko Tronçon 详细介绍了 XMPP 协议的历史发展、协议架构、服务器和客户端实现、安全机制等方面的技术细节。同时，本书还提供了许多实用的开发示例和应用场景，帮助读者更好地理解和应用 XMPP 协议。《XMPP：The Definitive Guide》是一本权威的 XMPP 协议参考书籍，对于 XMPP 开发者和使用者来说是一本非常有价值的资源。

In Part III, we intersperse protocol examples with software code showing one possible

implementation of several protocol interactions. This software code is written in the

Python programming language, a popular, easy-to-read language for scripting and ap-

plication development.

Using Code Examples

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

author, publisher, and ISBN. For example: “XMPP: The Definitive Guide, by Peter

Kevin Smith, and Remko Tronçon, 978-0-596-52126-4.”

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xvi | Preface

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We have a web page for this book, where we list errata, examples, and any additional

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Finally, the authors of this book can usually be found on the XMPP network in the

jdev@conference.jabber.org chat room.

Acknowledgments

We would like to thank Mary Treseler for her editorial guidance throughout this

project, and her patience with an enthusiastic but not entirely disciplined group of

authors. We’d also like to thank our technical reviewers for their thorough comments

on, and insight into, the contents of this book; it was greatly improved by their input.

Thank you Dave Cridland, Brian Dainton, Kellan Elliott-McCrea, Michelle Fisher,

Nathan Fritz, and Jack Moffitt.

Peter Saint-Andre

Thanks are due to the many developers who helped me understand these technologies

as they were being designed in the early days of the Jabber open source community. I

would like to especially recognize the help of my friend Peter Millard, who patiently

answered my never-ending questions about Jabber technologies from 1999 until his

death in 2006. I dedicate my work on this book to his memory.

I would not have been able to contribute to XMPP all these years without the generous

support of my employer, Jabber, Inc. (now part of Cisco Systems, Inc.).

Most fundamentally, my wife, Elisa, has always cheerfully tolerated my obsession with

XMPP despite countless hours working on specs, posting to discussion lists, writing

blog entries, traveling to conferences, and all the rest.

Kevin Smith

Many of the members of the XMPP community have been supportive over the last seven

or so years since my first involvement, and I’d like to acknowledge particularly those

people I’ve worked with in the Psi and Sleek projects, and those I’ve worked with on

the XMPP Council in expanding my knowledge of XMPP and software development.

Thanks to Peter and Remko especially, for all the fun we’ve had with this book.

Preface | xvii

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