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Understanding Changes in Active Web Technology: Dynamic Content and User Interaction

This article delves into the evolution of active web technology, focusing on the dynamics of content presentation and user engagement. Key aspects include how changes in media streams and user-generated content occur, and the roles played by automatic site authors and users. We analyze the pace of change, security challenges, and the interaction between client-side and server-side processes. Additionally, the article explores socio-technical solutions for improved data security, implementation complexity, and feedback mechanisms in dynamic web applications.

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Understanding Changes in Active Web Technology: Dynamic Content and User Interaction

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  1. Active Web Technology Alan Dix http://www.hiraeth.com/alan/topics/web/ alan@hcibook.com

  2. user view • what changes? • media stream, presentation, content • by whom? • automatic, site author, user • other users - feedthrough • how often? • pace of change: days, months, seconds

  3. computation where does it happen client • applets, JavaScript, Shockwave, DHTML server • CGI scripts, active server pages, servlets, etc, other machine • authoring machine, database server, proxy people • socio-techncal solutions

  4. security • for computation • code and data at same place! • problem • data - needs to be secure • web-server - least secure machine • client machine even worse … and networks!

  5. architectural design • what happens where • affects: • complexity of implementation and maintenance • feedback • seeing results of one’s own actions • feedthrough • seeing effects of other people’s actions

  6. client side dynamism animation Java and JavaScript DHTML

  7. animated gif or movie • pros: simple • cons: predetermined sequence also … streaming audio/video

  8. Java applet or JavaScript running locally • pros: rapid feedback • cons: only local, no feedthrough

  9. server side dynamism CGI scripts searches

  10. searches • create indices off-line • fast lookup when needed see http://www.hcibook.com/

  11. database access client-side - JDBC server side - CGI etc.

  12. Java applet accesses database using JDBC • pros: interactive DB access • cons: bandwidth, security

  13. CGI script accesses database • pros: up-to-date, use existing DB • cons: not proxy/index friendly

  14. socio-technical solutions off-line generation people in the process

  15. batch pre-generation of web pages • pros: indexable, secure • cons: slower turnaround

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