Open Source Web Technologies

`Q 1Q Starting the learning curve with Open Source Web Technologies Zend-Framework GoogleGears

Zend FrameWork
Zend Framework is an open source object oriented web application framework impelmented in PHP5.
This frameworks seeks to promote web developement best practices among the php community
Zend provides Zend engine for PHP for free

Key Features
Simplicity
Maintainability & extensibility-->reusing components .
Fully Documented .
Simple & rapid development .
.Follows MVC pattern .
Showcase Current Trends
Web Services
Ajax
Search

Zend components Classification

Zend Framework Installation
Switch to user
Sudo apt-get install zend-framework
Add to include_path in php.ini file
php_value include_path '.:/usr/share/php/libzend-framework-php'
cd /var/www/
Test on command line
Zf create project Places

What is MVC?
Model : The ”stuff” you are using in the application data, web services, feeds etc.
View: The display returned to the user
Controller : Manages the request & determines what
happens

User Enters in the form Controller directs to db Db searches out Finds the reqd. And sends back the data MVC module in real time User to The view Controller Model database View to the user

MVC Flow

Zend-framework Anatomy
Top level Directories
Application
Library
Public
tests

Zend bootstrap File

From Online to Offline
Browser – plugin
Cost
Open Source
Lightweight installation necessary
Application stays completely in the browser, no extra app/start up
Offline are also Necessary
Internet unavailable?
Don’t want the data in the clouds?
Response time?
Fill the gaps between online and offline

Offline Architecture Text

Offline Tools
In the past
Dojo Storage, Derby/JavaDB, Zimbra
Today
Adobe AIR
Google Gears
Microsoft Silverlight
Coming Soon
FireFox 3
HTML5 Working Draft
Client-side database storage

Detecting & Installing Gears
<script src="gears_init.js"></script>
<script>
if (!window.google || !google.gears) {
location.href = "http://gears.google.com/?action=install&message=<your welcome message>" +
"&return=<your website url>";
}
</script>

Components Local Sever Let web applications interact naturally with your desktop Database Store data locally in a fully-searchable database WorkerPool Run JavaScript in the background to improve performance

LocalServer
Specialized URL Cache
Requests for URLs in the LocalServer’s cache are intercepted and served locally from the user’s disk
RecourseStore (Manual Update)
ManagedResourceStore
(Automatic Update)
Manifest File

DataBase
Open source SQLite Database
Simplified SQL Syntax
Full-text Search

Workerpool
Time-intensive processes can be run in the background
UI stays responsive/browser doesn’t block
No warning dialog “Unresponsive Script”

Example

Applications Gmail Calendar Maps SpreadSheet Reader Google Gears Docs

Conclusions
It opens a lot of doors to developers looking to bridge the narrowing gap between desktop and web-based applications.
Google Gears is an open source plugin that aims to push the Web forward
• The components are simple to use
• You need to think about your architecture
http://code.google.com/apis/gears/
http://gears.google.com/
Thanks for your time : )

Thank You !

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Open Source Web Technologies

by SrishAkaTux on Sep 04, 2010

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