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Файл:Ajax In Action (2006).pdf
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- •preface
- •acknowledgments
- •about this book
- •Who should read this book?
- •Roadmap
- •Code conventions
- •Code downloads
- •Author Online
- •About the title
- •About the cover illustration
- •Rethinking the web application
- •A new design for the Web
- •1.1 Why Ajax rich clients?
- •1.1.1 Comparing the user experiences
- •1.1.2 Network latency
- •1.1.3 Asynchronous interactions
- •1.1.4 Sovereign and transient usage patterns
- •1.1.5 Unlearning the Web
- •1.2 The four defining principles of Ajax
- •1.2.1 The browser hosts an application, not content
- •1.2.2 The server delivers data, not content
- •1.2.3 User interaction with the application can be fluid and continuous
- •1.2.4 This is real coding and requires discipline
- •1.3 Ajax rich clients in the real world
- •1.3.1 Surveying the field
- •1.3.2 Google Maps
- •1.4 Alternatives to Ajax
- •1.4.2 Java Web Start and related technologies
- •1.5 Summary
- •1.6 Resources
- •First steps with Ajax
- •2.1 The key elements of Ajax
- •2.2 Orchestrating the user experience with JavaScript
- •2.3 Defining look and feel using CSS
- •2.3.1 CSS selectors
- •2.3.2 CSS style properties
- •2.3.3 A simple CSS example
- •2.4 Organizing the view using the DOM
- •2.4.1 Working with the DOM using JavaScript
- •2.4.2 Finding a DOM node
- •2.4.3 Creating a DOM node
- •2.4.4 Adding styles to your document
- •2.4.5 A shortcut: Using the innerHTML property
- •2.5 Loading data asynchronously using XML technologies
- •2.5.1 IFrames
- •2.5.2 XmlDocument and XMLHttpRequest objects
- •2.5.3 Sending a request to the server
- •2.5.4 Using callback functions to monitor the request
- •2.5.5 The full lifecycle
- •2.6 What sets Ajax apart
- •2.7 Summary
- •2.8 Resources
- •Introducing order to Ajax
- •3.1 Order out of chaos
- •3.1.1 Patterns: creating a common vocabulary
- •3.1.2 Refactoring and Ajax
- •3.1.3 Keeping a sense of proportion
- •3.1.4 Refactoring in action
- •3.2 Some small refactoring case studies
- •3.2.2 Managing event handlers: Observer pattern
- •3.2.3 Reusing user action handlers: Command pattern
- •3.2.4 Keeping only one reference to a resource: Singleton pattern
- •3.3 Model-View-Controller
- •3.4 Web server MVC
- •3.4.1 The Ajax web server tier without patterns
- •3.4.2 Refactoring the domain model
- •3.4.3 Separating content from presentation
- •3.5 Third-party libraries and frameworks
- •3.5.2 Widgets and widget suites
- •3.5.3 Application frameworks
- •3.6 Summary
- •3.7 Resources
- •Core techniques
- •The page as an application
- •4.1 A different kind of MVC
- •4.1.1 Repeating the pattern at different scales
- •4.1.2 Applying MVC in the browser
- •4.2 The View in an Ajax application
- •4.2.1 Keeping the logic out of the View
- •4.2.2 Keeping the View out of the logic
- •4.3 The Controller in an Ajax application
- •4.3.1 Classic JavaScript event handlers
- •4.3.2 The W3C event model
- •4.3.3 Implementing a flexible event model in JavaScript
- •4.4 Models in an Ajax application
- •4.4.1 Using JavaScript to model the business domain
- •4.4.2 Interacting with the server
- •4.5 Generating the View from the Model
- •4.5.1 Reflecting on a JavaScript object
- •4.5.2 Dealing with arrays and objects
- •4.5.3 Adding a Controller
- •4.6 Summary
- •4.7 Resources
- •The role of the server
- •5.1 Working with the server side
- •5.2 Coding the server side
- •5.2.1 Popular implementation languages
- •5.3 The big picture: common server-side designs
- •5.3.1 Naive web server coding without a framework
- •5.3.2 Working with Model2 workflow frameworks
- •5.4 The details: exchanging data
- •5.4.2 Introducing the planet browser example
- •5.5 Writing to the server
- •5.5.1 Using HTML forms
- •5.5.2 Using the XMLHttpRequest object
- •5.5.3 Managing user updates effectively
- •5.6 Summary
- •5.7 Resources
- •Professional Ajax
- •The user experience
- •6.1 Getting it right: building a quality application
- •6.1.1 Responsiveness
- •6.1.2 Robustness
- •6.1.3 Consistency
- •6.1.4 Simplicity
- •6.1.5 Making it work
- •6.2 Keeping the user informed
- •6.2.1 Handling responses to our own requests
- •6.2.2 Handling updates from other users
- •6.3 Designing a notification system for Ajax
- •6.3.1 Modeling notifications
- •6.3.2 Defining user interface requirements
- •6.4 Implementing a notification framework
- •6.4.1 Rendering status bar icons
- •6.4.2 Rendering detailed notifications
- •6.4.3 Putting the pieces together
- •6.5 Using the framework with network requests
- •6.6 Indicating freshness of data
- •6.6.1 Defining a simple highlighting style
- •6.6.2 Highlighting with the Scriptaculous Effects library
- •6.7 Summary
- •6.8 Resources
- •Security and Ajax
- •7.1 JavaScript and browser security
- •7.1.1 Introducing the “server of origin” policy
- •7.1.2 Considerations for Ajax
- •7.1.3 Problems with subdomains
- •7.2 Communicating with remote services
- •7.2.1 Proxying remote services
- •7.2.2 Working with web services
- •7.3 Protecting confidential data
- •7.3.1 The man in the middle
- •7.3.2 Using secure HTTP
- •7.3.3 Encrypting data over plain HTTP using JavaScript
- •7.4 Policing access to Ajax data streams
- •7.4.1 Designing a secure web tier
- •7.4.2 Restricting access to web data
- •7.5 Summary
- •7.6 Resources
- •Performance
- •8.1 What is performance?
- •8.2 JavaScript execution speed
- •8.2.1 Timing your application the hard way
- •8.2.2 Using the Venkman profiler
- •8.2.3 Optimizing execution speed for Ajax
- •8.3 JavaScript memory footprint
- •8.3.1 Avoiding memory leaks
- •8.3.2 Special considerations for Ajax
- •8.4 Designing for performance
- •8.4.1 Measuring memory footprint
- •8.4.2 A simple example
- •8.5 Summary
- •8.6 Resources
- •Ajax by example
- •Dynamic double combo
- •9.1 A double-combo script
- •9.2 The client-side architecture
- •9.2.1 Designing the form
- •9.2.2 Designing the client/server interactions
- •9.3 Implementing the server: VB .NET
- •9.3.1 Defining the XML response format
- •9.4 Presenting the results
- •9.4.1 Navigating the XML document
- •9.4.2 Applying Cascading Style Sheets
- •9.5 Advanced issues
- •9.5.2 Moving from a double combo to a triple combo
- •9.6 Refactoring
- •9.6.1 New and improved net.ContentLoader
- •9.7 Summary
- •Type-ahead suggest
- •10.1 Examining type-ahead applications
- •10.1.2 Google Suggest
- •10.2.1 The server and the database
- •10.3 The client-side framework
- •10.3.1 The HTML
- •10.3.2 The JavaScript
- •10.3.3 Accessing the server
- •10.5 Refactoring
- •10.5.1 Day 1: developing the TextSuggest component game plan
- •10.5.3 Day 3: Ajax enabled
- •10.5.4 Day 4: handling events
- •10.5.6 Refactor debriefing
- •10.6 Summary
- •11.1 The evolving portal
- •11.1.1 The classic portal
- •11.1.2 The rich user interface portal
- •11.2 The Ajax portal architecture using Java
- •11.3 The Ajax login
- •11.3.1 The user table
- •11.4 Implementing DHTML windows
- •11.4.1 The portal windows database
- •11.4.3 Adding the JS external library
- •11.5 Adding Ajax autosave functionality
- •11.5.1 Adapting the library
- •11.5.2 Autosaving the information to the database
- •11.6 Refactoring
- •11.6.1 Defining the constructor
- •11.6.2 Adapting the AjaxWindows.js library
- •11.6.3 Specifying the portal commands
- •11.6.4 Performing the Ajax processing
- •11.6.5 Refactoring debrief
- •11.7 Summary
- •Live search using XSLT
- •12.1 Understanding the search techniques
- •12.1.1 Looking at the classic search
- •12.1.3 Examining a live search with Ajax and XSLT
- •12.1.4 Sending the results back to the client
- •12.2 The client-side code
- •12.2.1 Setting up the client
- •12.2.2 Initiating the process
- •12.3 The server-side code: PHP
- •12.3.1 Building the XML document
- •12.3.2 Building the XSLT document
- •12.4 Combining the XSLT and XML documents
- •12.4.1 Working with Microsoft Internet Explorer
- •12.4.2 Working with Mozilla
- •12.5 Completing the search
- •12.5.1 Applying a Cascading Style Sheet
- •12.5.2 Improving the search
- •12.5.3 Deciding to use XSLT
- •12.5.4 Overcoming the Ajax bookmark pitfall
- •12.6 Refactoring
- •12.6.1 An XSLTHelper
- •12.6.2 A live search component
- •12.6.3 Refactoring debriefing
- •12.7 Summary
- •Building stand-alone applications with Ajax
- •13.1 Reading information from the outside world
- •13.1.1 Discovering XML feeds
- •13.1.2 Examining the RSS structure
- •13.2 Creating the rich user interface
- •13.2.1 The process
- •13.2.3 Compliant CSS formatting
- •13.3 Loading the RSS feeds
- •13.3.1 Global scope
- •13.3.2 Ajax preloading functionality
- •13.4 Adding a rich transition effect
- •13.4.2 Implementing the fading transition
- •13.4.3 Integrating JavaScript timers
- •13.5 Additional functionality
- •13.5.1 Inserting additional feeds
- •13.5.2 Integrating the skipping and pausing functionality
- •13.6 Avoiding the project’s restrictions
- •13.6.1 Overcoming Mozilla’s security restriction
- •13.6.2 Changing the application scope
- •13.7 Refactoring
- •13.7.1 RSS reader Model
- •13.7.2 RSS reader view
- •13.7.3 RSS reader Controller
- •13.7.4 Refactoring debrief
- •13.8 Summary
- •The Ajax craftsperson’s toolkit
- •A.1 Working smarter with the right toolset
- •A.1.1 Acquiring tools that fit
- •A.1.2 Building your own tools
- •A.1.3 Maintaining your toolkit
- •A.2 Editors and IDEs
- •A.2.1 What to look for in a code editor
- •A.2.2 Current offerings
- •A.3 Debuggers
- •A.3.1 Why we use a debugger
- •A.3.2 JavaScript debuggers
- •A.3.3 HTTP debuggers
- •A.3.4 Building your own cross-browser output console
- •A.4 DOM inspectors
- •A.4.1 Using the Mozilla DOM Inspector
- •A.4.2 DOM inspectors for Internet Explorer
- •A.4.3 The Safari DOM Inspector for Mac OS X
- •A.5 Installing Firefox extensions
- •A.6 Resources
- •JavaScript for object-oriented programmers
- •B.1 JavaScript is not Java
- •B.2 Objects in JavaScript
- •B.2.1 Building ad hoc objects
- •B.2.2 Constructor functions, classes, and prototypes
- •B.2.3 Extending built-in classes
- •B.2.4 Inheritance of prototypes
- •B.2.5 Reflecting on JavaScript objects
- •B.2.6 Interfaces and duck typing
- •B.3 Methods and functions
- •B.3.1 Functions as first-class citizens
- •B.3.2 Attaching functions to objects
- •B.3.3 Borrowing functions from other objects
- •B.3.4 Ajax event handling and function contexts
- •B.3.5 Closures in JavaScript
- •B.4 Conclusions
- •B.5 Resources
- •Ajax frameworks and libraries
- •Accesskey Underlining Library
- •ActiveWidgets
- •Ajax JavaServer Faces Framework
- •Ajax JSP Tag Library
- •Ajax.NET
- •AjaxAC
- •AjaxAspects
- •AjaxCaller
- •AjaxFaces
- •BackBase
- •Behaviour
- •Bindows
- •BlueShoes
- •CakePHP
- •CL-Ajax
- •ComfortASP.NET
- •Coolest DHTML Calendar
- •Dojo
- •DWR (Direct Web Remoting)
- •Echo 2
- •FCKEditor
- •Flash JavaScript Integration Kit
- •Google AjaxSLT
- •Guise
- •HTMLHttpRequest
- •Interactive Website Framework
- •Jackbe
- •JPSpan
- •jsolait
- •JSON
- •JSRS (JavaScript Remote Scripting)
- •LibXMLHttpRequest
- •Mochikit
- •netWindows
- •Oddpost
- •OpenRico
- •Pragmatic Objects
- •Prototype
- •Qooxdoo
- •RSLite
- •Ruby on Rails
- •Sack
- •SAJAX
- •Sarissa
- •Scriptaculous
- •SWATO…
- •Tibet
- •TinyMCE
- •TrimPath Templates
- •Walter Zorn’s DHTML Libraries
- •WebORB for .NET
- •WebORB for Java
- •XAJAX
- •x-Desktop
- •XHConn
- •index
- •Symbols
- •Numerics
Part 4
Ajax by example
The five complete Ajax projects in this section demonstrate the full process of building compelling interactive elements for your web applications. In each case, we’ve developed a straightforward example, step by step, so you can see how it works. We’ve then refactored the code so that the example can be dropped into your own projects easily. The examples cover the full spectrum of what Ajax can do, from enhancing form elements to developing complete portal solutions, communicating to both your own server-side processes and to standard Internet services. We’ve deliberately chosen a mixture of popular server-side programming languages in which to implement the server-side code, so you’ll find a medley of PHP, Java, VB.Net and C# in this section. The downloadable code available from the website will contain multiple implementations of the sever-side back-end for each chapter. Have fun!
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