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Chapter 9

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

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Chapter 9

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  1. Chapter 9 Comparing Web Technologies

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

  3. Browser • Selection Criteria • Popular Browser • Next generation

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

  5. Selection Criteria • Functions • Frames • Forms • Tables • Fonts • Cascade style sheet (CSS) • JavaScript • Java

  6. Selection Criteria • Functions • Plug-ins • News • Mail • HTML editor • Reliability • Cost

  7. Selection Criteria • Support • Vendor • Third party • Hardware requirement • Server side • Client side • Speed/performance

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

  9. Popular Browser • Netscape Communicator • Internet Explorer • Opera • Lynx • Amaya • Arachne • HotJava

  10. 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?

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

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

  13. Hypertext Markup Language • HTML 4.0 • Dynamic HTML • Extensible markup language

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

  15. Common Gateway Interface • General concepts • Languages • Language selection criteria

  16. 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

  17. Languages • C • C++ • Java • JavaScript • Jscript • ECMAScript • Perl • Python • VisualBasic Script

  18. 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

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

  20. Web Application Server • General Concepts • Selection Criteria • Products

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

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

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

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

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

  26. Products • Netwcape Application Server • SilverStream • WebObjects • WebSphere Application Server • Sope

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

  28. Plug-in • Purpose • Products

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

  30. 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

  31. 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?

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

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