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Chengyu Sun California State University, Los Angeles

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Presentation on theme: "Chengyu Sun California State University, Los Angeles"— Presentation transcript:

1 Chengyu Sun California State University, Los Angeles
CS320 Web and Internet Programming Introduction to Web Application Development Chengyu Sun California State University, Los Angeles

2 Browsing the Web

3 How the Web Works Browser HTTP Server HTTP?? HTTP request
HTTP response HTTP?? \htdocs welcome.html \cs320stu31 index.html … …

4 URL ?? ?? ?? ??

5 HTML <html> <head><title>CS320 Hello</title></head> <body> Welcome to <b>CS320</b>! </body> </html>

6 Dynamic Content Web search results Shopping cart …
Anything that need to be generated on the fly based on user request

7 Deliver Dynamic Content
Browser Application Server HTTP request HTTP response input output program

8 Terminology Application server
Servlet container Server-side programming vs. Client-side programming Browser Application Server HTTP request Client-side program HTTP response input output Server-side program

9 Server-side Technologies
CGI C, Perl Java Servlet/JSP ASP.NET VB, C# PHP Ruby Python old mainstream other

10 Client-side Technologies
HTML, CSS JavaScript Java Applet Rich Internet Application (RIA) technologies Adobe Flex and Flash Microsoft Silverlight

11 Why Web Applications? Take traditional businesses to larger audience
Amazon, Netflix Replace desktop applications Google Docs, MS Office Live Open up new opportunities Facebook, Twitter, Youtube

12 Advantages of Web Applications
Low publishing and distribution cost Potentially large user base Centralized administration No client side installation Professional maintenance Easy data backup Easy upgrade Available anywhere, anytime Piracy proof

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