Ajax for web application developers

289 Pages·2.37 MB·English

by  ProQuest., Hadlock, Kris

Ajax for Web
Application
Developers
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Ajax for Web
Application
Developers
Kris Hadlock
DEVELOPER’S
LIBRARY
Sams Publishing,800 East 96th Street,Indianapolis,Indiana 46240 USA
Ajax for Web Application Developers Acquisitions Editors
Copyright © 2007 by Sams Publishing Linda Harrison
Mark Taber
All rights reserved. No part of this book shall be reproduced,stored in a retrieval sys-
tem,or transmitted by any means,electronic,mechanical,photocopying,recording,or Development Editor
otherwise,without written permission from the publisher. No patent liability is Damon Jordan
assumed with respect to the use of the information contained herein. Although every
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damages resulting from the use of the information contained herein. Project Editor
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Printed in the United States of America Jessica McCarty
First Printing: October 2006 Indexer
09 08 07 06 4 3 2 1 Larry Sweazy
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❖
This book is dedicated to my wife,Lisa,who inadvertently
introduced me to the world of web design and development
and who also stood by me through endless hours of neglect
while I wrote this book.I also dedicate this book to my
late grandparents,who selflessly got me where I am today
by helping me through school.
❖
Contents at a Glance
Introduction 1
I: Getting Started
1 Introduction to Ajax 5
2 The Request 7
3 The Response 19
4 Rendering the Response with XHTML and CSS 33
II: Creating and Using the JavaScript Engine
5 Object-Oriented JavaScript 41
6 Creating the Engine 55
7 Using the Engine 61
8 Debugging 65
9 Extending the Engine 81
III: Creating Reusable Components
10 Accordion 101
11 Tree View 113
12 Client-Side Validation 125
13 Data Grid 141
IV: Ajax Patterns
14 Singleton Pattern 157
15 Model View Controller 163
16 The Observer Pattern 169
17 Data Reflection Pattern 179
18 Interaction Patterns 185
19 Usability Patterns 201
V: Interaction
20 Understanding Ajax Database Interaction 211
21 Interacting with a Database: The Server-Side 229
22 Advanced Ajax Database interaction 237
VI: Touches
23 Securing Your Application 245
24 Best Practices 253
Index 257
Table of Contents
Introduction 1
An Introduction to the Book Samples 2
I: Getting Started
1 Introduction to Ajax 5
The XML DOM 5
Measuring the Benefits 6
2 The Request 7
An In-Depth Look at XMLHttpRequest 7
A Standard XHR 8
A Database-Enabled XHR 9
Sending Data to a Database-Enabled XHR 9
Creating the Object 11
Asynchronous Data Transfers 13
The Ready State 14
HTTP Status Codes and Headers 16
3 The Response 19
XML 19
Elements 20
Attributes 21
CDATA 22
Parsing XML 23
JSON 27
The Syntax 28
Using JSON 29
Parsing JSON 30
4 Rendering the Response with XHTML and CSS 33
XHTML 33
CSS 36
II: Creating and Using the JavaScript Engine
5 Object-Oriented JavaScript 41
Object-Oriented Approaches 42
Using the new Operator 42
Literal Notation 43
Associative Arrays 43
JScript.NET 44
Object Constructors 45
Instances 45
Properties 46
Methods 47
Prototypes 49
Instances 50
Creating Properties 51
Overriding and Overwriting Properties 52
Property Protection 52
Methods 53
Extending Objects with Prototyped Methods 53
6 Creating the Engine 55
Creating a Custom Ajax Wrapper 55
Making Requests 56
The Ready State 57
The Response 58
Creating an Ajax Updater 59
Constructing the Object 59
Updating the Request Object 59
The Response 60
7 Using the Engine 61
Getting Started 61
Making a Request 62
Engine Methods and Properties 63