Jabber Developer's Handbook

by Wright, William; Moore, Dana

• ISBN13: 9780672325366
• ISBN10: 0672325365
• Edition: 1st
• Format: Paperback
• Copyright: 2003-07-08
• Publisher: Sams Publishing

Summary

The Internet is evolving into an infrastructure where applications can converse with one another in a much different way than the traditional page-serving architectures of the first generation Web.Through examples and clear explanations,Jabber Developer¿s Handbookdemonstrates how Jabber, currently the world¿s most important open source messaging protocol, can be used to go beyond interactive chat and file sharing to build flexible, reliable, and powerful distributed software systems. Peer-to-peer applications using the Jabber open source toolkit, and leverage its use with other readily available and open source software and middleware. It explains how to use Jabber peer-to-peer technologies to solve troublesome reliability and interoperability issues with distributed systems. While peer-to-peer computing and Jabber are considered fairly new technologies, the authors have extensive hands-on experience in applying a variety of system messaging technologies.Jabber Developer¿s Handbookshows how to design, build, and integrate peer-to-peer applications using the Jabber open source toolkit, and leverage its use with other readily available and open source software and middleware. It explains how to use Jabber peer-to-peer technologies to solve troublesome reliability and interoperability issues with distributed systems. While peer-to-peer computing and Jabber are considered fairly new technologies, the authors have extensive hands-on experience in applying a variety of system messaging technologies.

Author Biography

Dana Moore is a senior scientist with BBN Technologies in Arlington, VA William Wright is a division engineer with BBN Technologies in Arlington, VA

Table of Contents

Introduction: Let's Jabber	p. 1
Jabber Enables Peer-to-Peer Computing	p. 1
Jabber Enables an Evolved System Architecture	p. 2
Jabber In-Depth	p. 5
What Is Jabber Technology?	p. 7
Traditional Applications and How They Got That Way	p. 7
The Nature of Traditional Tools	p. 8
Shortcomings of Traditional Tools	p. 9
Jabber Is...	p. 11
...Built-in Services...	p. 11
Service Discovery	p. 13
Server and Client Interactions	p. 14
...Client-Based Services...	p. 17
...Open...	p. 19
...Asynchronous...	p. 19
...Extensible...	p. 20
...Decentralized...	p. 21
...Secure...	p. 22
...XML Protocol...	p. 22
Riding on TCP/IP	p. 22
Provides Real-time Exchange of Messages	p. 22
...And Presence Information	p. 23
...Between Two Endpoints on the Open Internet	p. 23
...And a Corporate Intranet	p. 24
A Useful Application to Jump-Start Your Interest	p. 24
A Practical User Creation Script (Java version)	p. 25
A Practical User Creation Script (Python version)	p. 30
Jabber's Open Source Development Heritage (And Its Implications)	p. 33
Conclusion (or Rather, The Beginning)	p. 33
Installing and Configuring Jabber Software	p. 35
Downloading the Server Software	p. 35
Installing the Server Software	p. 36
Linux and Unix	p. 36
Windows	p. 39
Initial Server Configuration	p. 40
Jabberd Command-line Arguments	p. 40
The jabber.xml File	p. 40
Starting jabberd	p. 43
Service Configuration Details	p. 44
Service XDB	p. 44
Service io	p. 46
Service c2s	p. 48
Service s2s	p. 49
Service dnsrv	p. 51
Log Services	p. 51
The Sessions Service	p. 53
Common Optional Services	p. 61
Jabber User Directory (JUD)	p. 61
Conferencing	p. 63
Instant Messaging Clients	p. 66
Summary	p. 68
All About Jabber Clients	p. 69
What Is a Jabber Client?	p. 70
Session Mechanics	p. 70
Protocol Mechanics	p. 70
Protocol Details	p. 78
The [left angle bracket]stream:stream[right angle bracket] Tag	p. 78
The [left angle bracket]iq[right angle bracket] Element	p. 78
Jabber Presence	p. 84
Presence Attributes	p. 87
The [left angle bracket]presence[right angle bracket] Element	p. 87
The [left angle bracket]message[right angle bracket] Element	p. 91
The [left angle bracket]body/[right angle bracket] Subelement	p. 93
Additional [left angle bracket]message/[right angle bracket] Subelements	p. 95
Using [left angle bracket]message/[right angle bracket] to Convey Arbitrary Data	p. 99
Summary	p. 122
Jabber Server Architecture	p. 123
High-Level Architecture	p. 123
Messages and Sessions	p. 125
Remote Messaging	p. 127
Client Initialization	p. 130
Browsable Agents	p. 142
Instant Messaging Gateways	p. 148
Summary	p. 153
Extending the Jabber Server	p. 155
A Database Service	p. 156
Configuring the Service	p. 156
Code Listing	p. 158
Connecting to the Server	p. 166
JDBC Survival Skills	p. 167
Browsing	p. 169
Searching	p. 174
A Report Service	p. 179
Code Listing	p. 180
Registration	p. 186
A Small Digression: A Custom Packet Type for JabberBeans	p. 188
Custom Storage in XDB	p. 193
Timed Report Generation	p. 196
An Inventory Management Service	p. 198
Decomposing the Inventory Management Service	p. 208
Summary	p. 224
Jabber Security	p. 225
Client Registration	p. 226
Disabling Automatic Registration	p. 231
Registration Data	p. 232
Client Authentication	p. 233
Plain Authentication	p. 236
Digest Authentication	p. 238
Zero-Knowledge Authentication	p. 242
A Custom Authentication Component	p. 245
Connecting the Authentication Service	p. 246
Handling Authorization Packets	p. 247
Using SSL for Client Connections	p. 258
SSL Overview	p. 258
Enabling SSL in the Jabber Server	p. 260
Server-to-Server Connection Authentication (Dialback)	p. 265
Summary	p. 268
Jabber-Based Networked Applications	p. 271
What's in a Name: Web Services	p. 273
First-Generation Applications: Servers and Glass Terminals	p. 273
Second-Generation Applications: Servers and Clients	p. 274
Third Generation Applications: Enter the Web	p. 275
Fourth-Generation Applications: XML and Web Services	p. 276
XML-RPC	p. 278
SOAP	p. 283
WSDL	p. 284
UDDI	p. 285
Jabber and XML-RPC	p. 286
Jabber-Based RPC	p. 287
Jabber RPC Invoker	p. 287
Jabber RPC Service Provider (First Version)	p. 289
Jabber RPC Service Provider (Second Version)	p. 292
Jabber-RPC Object Lessons	p. 296
Summary	p. 296
Jabber and Conversational Software Agents	p. 299
Motivating This Application	p. 300
Accomplishing the Objective	p. 300
What Is Alice?	p. 300
Why Alice Appears to Work	p. 301
Alice Design Principles	p. 301
The Alicebot Server	p. 302
AIML Folder--Alice's Built-in Knowledge	p. 302
Lib Folder--Alice ProgramD's Java Library	p. 303
Alice Configuration Files	p. 303
ALICE Static Knowledge (AIML) Files	p. 306
The Category Tag	p. 306
The Pattern Tag	p. 306
The Template Tag	p. 306
The Topic Tag	p. 306
Fitting the Pieces Together	p. 316
The AliceJabber Mux Code	p. 318
Running ALICE with Jabber	p. 324
Summary	p. 325
Jabber and System Control and Administration	p. 327
Jabber for System Event Monitoring	p. 327
Jabber for Version Management	p. 338
Jabber for Distributed Control	p. 341
Jabber for Application Monitoring	p. 350
Summary	p. 363
Jabber and JXTA	p. 365
JXTA Technology Introduction	p. 365
Elements of JXTA Technology	p. 366
Identifiers	p. 366
Advertisements	p. 366
Messages	p. 368
Peers	p. 368
Peer Groups	p. 369
Pipes	p. 369
Modules (Services)	p. 369
Roles for JXTA Peers	p. 370
Rendezvous Peers	p. 370
Relay Peers	p. 370
Proxy Peers	p. 370
Trying Out JXTA	p. 370
The JXTA Java Binding API	p. 375
Example: A Jabber-to-JXTA Bridge	p. 376
Details of the talk Protocol	p. 379
Summary: Jabber and JXTA as Complimentary Technologies	p. 397
Jabber Libraries for Popular Languages	p. 399
Jabber-Net--Jabber for the .NET Environment	p. 399
Building the Examples	p. 407
iksemel--Jabber for C/C++	p. 408
JabberBeans--Jabber for Java	p. 413
JabberPy--Jabber for Python	p. 414
A Cross-Language Example	p. 414
Jabberlib--Jabber for TCL	p. 418
Net::Jabber--Jabber for Perl	p. 421
Jabber4R--Jabber for Ruby	p. 424
Summary	p. 427
Appendixes	p. 429
Glossary	p. 431
XML Basics	p. 435
A Simple Document	p. 435
Tag Attributes	p. 436
Comments	p. 436
XML Namespaces	p. 437
XML Streams	p. 438
Resources	p. 439
Jabber Servers	p. 439
Jabber Protocol	p. 439
Jabber Clients	p. 439
Jabber Libraries	p. 440
Macromedia Flash	p. 440
JabberBeans	p. 440
Alicebots	p. 440
JabberPy	p. 440
Miscellany	p. 441
Index	p. 443
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