Transcript AJAX: Building Today`s Web Application

Jeevan Kumar Gogineni
Instructor,
Dr. Khalili Bahram
 History of Web Applications
 What is Ajax?
 Two real Applications of Ajax
 Why Ajax in Web Applications?
 Different Technologies in Ajax
 How each Technology interacts in Ajax Applications
 Important Notes about Ajax
 The fundamental purpose of all web applications is to
facilitate the completion of one or more tasks.”
 User at browser interacts with application at Web
Server
 Web Server Application sends HTML to Web user
agents for human display using HTTP.
 Using traditional methods, the whole content would
have to be reloaded on every request.
 AJAX is Asynchronous JavaScript And XML
 Ajax is not a new programming language but only a
new technique which combines mature programming
languages for web applications.
 Ajax Technologies to improve web application
responsiveness, performance as well as interactivity.
 Ajax applications are used to build Rich Internet
Application’s (RIA).
 The Rich Internet Application’s can also be created
using Adobe Flash, JavaFX and Microsoft Silverlight.
 Gmail
 Google Map
 Google Suggest Page
 The Future Application will follow this pattern.
http://www.dewspot.com/
http://monket.net/wiki-v2/Main_Page
 In Ajax applications, page reloading is not required.
 Ajax minimizes the Network traffic because it just requests
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what the user needs instead of the whole document.
Ajax makes the web applications look like a normal
desktop application.
Terrific Interaction.
Ajax application’s generally have higher response time than
Traditional HTML applications
It was worth mentioning that Ajax works across platforms
and it works regardless of any platform because it uses only
basic languages like HTML, Java etc.
 Java Script
 XMLHttpRequest
 DOM
 XHTML & CSS
 XML & XSLT
 XMLHttpRequest –For Asynchronous Communication
 DOM – Dynamic Display & Data Interaction
 XHTML & CSS – Look on the Browser
 XML & XSLT – For Data Processing
 Java Script - Gets all these Technologies together
 The technology was brought in early 1990’s and was used to full
extent only from mid 2000’s.
 Google was the one which spotted this technology and used in
different applications like Gmail, Google Maps, etc which
provided user interface that was much more like a web
application.
 Old applications like Calendar applications are all now getting
converted in to Ajax applications.
 Security aspects in Ajax and normal web applications are same
and which needs a good focus on.
 Do we only need JavaScript for Making Ajax
Applications:
No VBScript, .NET etc. also be used.
 Do we only need XML for data transfer and Manipulation
in Ajax Applications:
No, JavaScript Object Notation (JSON) etc.
 Can Rich Internet Applications are only built with Ajax.
No. Adobe Flash, JavaFX and Microsoft Silverlight.
 So Don’t mention as Acronym AJAX but as term Ajax.