Chapter 9 Comparing Web Technologies. Agenda Browser Hypertext Markup Language (HTML) Common Gateway Interface Web Application Server Plug-in.

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Presentation transcript:

Chapter 9 Comparing Web Technologies

Agenda Browser Hypertext Markup Language (HTML) Common Gateway Interface Web Application Server Plug-in

Browser Selection Criteria Popular Browser Next generation

Selection Criteria OS platform –Unix –Windows –Lynx Standards –World Wide Web Consortium (W3C) –Backward-compatible –Forward-compatible

Selection Criteria Functions –Frames –Forms –Tables –Fonts –Cascade style sheet (CSS) –JavaScript –Java

Selection Criteria Functions –Plug-ins –News –Mail –HTML editor Reliability Cost

Selection Criteria Support –Vendor –Third party Hardware requirement –Server side –Client side Speed/performance

Selection Criteria Types –Text-based –Multimedia-based –Online –Offline (Offline Explorer) Standard compliance Can you think any other selection criteria for browser?

Popular Browser Netscape Communicator Internet Explorer Opera Lynx Amaya Arachne HotJava

Next Generation Desired features –Integrated Internet service –Open source code for quality and portability –Real-time communication for chat –Small and modular programs –Speed –Standards Compliance –Anything else?

Next Generation Reality –Incompatible/proprietary feature –Complexity/more memory requirement –Unreliable/more bug/more insecure What do you think about the reality?

Agenda Browser Hypertext Markup Language (HTML) Common Gateway Interface Web Application Server Plug-in

Hypertext Markup Language HTML 4.0 Dynamic HTML Extensible markup language

Agenda Browser Hypertext Markup Language (HTML) Common Gateway Interface Web Application Server Plug-in

Common Gateway Interface General concepts Languages Language selection criteria

General Concept Common gateway interface (CGI) enables interaction between a web server and a browser using the hypertext transfer protocol (HTTP) CGI handles information requests and return the appropriate document or generate a dynamic document CGI is a gateway between database and web browser

Languages C C++ Java JavaScript Jscript ECMAScript Perl Python VisualBasic Script

Language Selection Criteria Hardware-independent Browser-independent Fast prototyping Easy to use and read Efficient and complete Object-oriented Portable Multi-platform environment Event handling and client-side execution Create and read cookies

Agenda Browser Hypertext Markup Language (HTML) Common Gateway Interface Web Application Server Plug-in

Web Application Server General Concepts Selection Criteria Products

General Concepts Three-tier architecture –Client –Database server –Web application server Functions of web application server –Transaction management –Clustering and load balancing

Selection Criteria Easy to use Functions –File, proxy, redirect and virtual hosting Interaction with heterogeneous databases Availability Security Scalability

Selection Criteria Performance Transaction Integrity Speed Quality of service Rapid application development Platform-independent

Selection Criteria Manageability Portability Integration with legacy systems Can you think any other selection criteria for web application server?

Products Avenida Web Server Bea WebLogic Enterprise Cold Fusion Enterprise Application Server eXcelon Inprise Application Server Lotus Domino Application Server

Products Netwcape Application Server SilverStream WebObjects WebSphere Application Server Sope

Agenda Browser Hypertext Markup Language (HTML) Common Gateway Interface Web Application Server Plug-in

Purpose Products

Purpose Interact with browser, web pages, local and Internet resources Native application for a certain processor, hardware and operating system

Products Adobe Acrobat Reader –Acrobat portable document format (PDF) –Distribute online brochure and technical documentation via Internet Apple Quicktime –Maximum exposure and viewing multimedia CD-ROM on the web

Products Platinum Cosmoplayer –Display documents in the virtual reality markup language (VRML) –3D world Macromedia Shockwave –Standard plug-in for multimedia on Internet Do you have any experience with these products?

Points to Remember Browser Hypertext Markup Language (HTML) Common Gateway Interface Web Application Server Plug-in