1. CGI and Perl MSc Publishing on the WWW

2. What is CGI ? (1) User Buying and selling Playing games Customised web pages Developer Means to run external programs Incorporate output into web pages Interaction with users Create dynamic pages with sound and video

3. What is CGI ? (2) Set of protocols that specify how programs interface with the web server. Not a programming language ! CGI programs/scripts can be written in Perl, AppleScript etc.

4. The Web Server p.o.v. To a web server one CGI program performs like another regardless of the programming language. Every CGI program must: Accept data (from the server) Process the data Send documents to the client according to the CGI protocol.

5. Running a CGI Script 5 6 3 4 2 1

6. Applications of CGI HTML Form processing e.g. orders, requests for info. Server Side image maps E-Commerce Databases e.g. search engines

7. Educational Applications Quizzes Course Management COSE DIY

8. Adding CGI to a Web Page Create in Notepad Save as a.pl Use forms to trigger script.