Laboratory

Module 15 - Interattività sul Web

For this module we'll use Netkit4TIC with the connettivity with the real network (read README file).

For ours purpose we'll use Wikipedia extensively. We follow chapter 35, 36 and 37 of Douglas Comer "Computer Networks and Internet".

• The Network Architecture Client/Server is the base for the Browser, e.g. a User agent that retrives a Web page and interprets HyperText documents with Hypermedia.
• URI is used to identify a resource and URL provides means of acting upon.
• The language used is based on HTML element or a more recent XHTML.
• The protocol is Hypertext Transfer Protocol where it uses MIME to encode/decode data. Inside the protocol there are hook for Web cache.
• Usually different client are included in Browser as Plugin.

• Server-side scripting
  
  • Common Gateway Interface
    Remember that during apache installation you can choose to configure a feature of apache where CGI scripts are run by the user who owns the script. It is useful if your users have CGI access and don't trust each other. (Other important files: /etc/apache/httpd.conf, /etc/apache/modules.conf)
  • Perl
    
• Client-side scripting
  
  • JavaScript
    
  • PHP
    

See VMWare to read LAMP descriptions

Start the experience with:

realHost$ lstart

To test a simple CGI program that prints the date and time at which is was run (date.sh):

realhost$ mozilla-firefox http://192.168.77.2/cgi-bin/date.sh

To test the Long-Term State information CGI program (ipaddr.sh):

realhost$ mozilla-firefox http://192.168.77.2/cgi-bin/ipaddr.sh

To test the Short-Term State information CGI program: which is was run (counter.sh):

realhost$ mozilla-firefox http://192.168.77.2/cgi-bin/counter.sh

• Java Programming Language
  

To test the example applet (clickcount.html, clickcount.java):

realhost$ mozilla-firefox http://192.168.77.2/clickcount.html

To test the example of interaction with a browser (buttons.html, buttons.java):

realhost$ mozilla-firefox http://192.168.77.2/buttons.html

To test the example of JavaScipt (js.html):

realhost$ mozilla-firefox http://192.168.77.2/js.html