CGI Programming Using Perl

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1. Course Introduction

Course Objectives Course Overview

Suggested References

2. The Internet and the Web

TCP/IP and Ports

DNS vs. Hosts Files Servers and Clients

Client/Server Protocols

3. Browsers and Servers

URLs

WEB Browsers and Servers

The Hypertext Transfer Protocol HTTP Requests and Responses HTTP Headers HTTP Requests Mime Types

4. Introduction to CGI

HTML Tag Structure

HTML Document Structure URLs and CGI CGI Programs

Running and Debugging from the

Command Line

Running and Debugging from a Browser Handling an HTML Form with CGI Generating HTML

5. CGI and Perl

Perl

Perl Programs

Why Use CGI.pm (and Where is It?)

Running and Debugging from the

Command Line

Generating HTML with CGI.pm

Running and Debugging from a Browser

6. Generating HTML

Introduction to CGI.pm

How to use CGI.pm’s Online

Documentation

CGI.pm’s Rules for General HTML Tags CGI.pm’s Rules for HTML Form Tags Named vs. Positional Parameters in

CGI.pm

7. Generating Forms

General Structure of HTML Forms Form Element Tags Pushbuttons Radiobuttons Checkboxes

Popups and Listboxes

Textfields, Passwords, and Textareas

8. CGI Data Flow Architecture

URL Encoding and Decoding

Data Flow between Browsers and

Servers GET vs. POST Which to Use?

CGI Environment Variables

Accessing CGI’s Environment Variables

9. Processing Form Data

Static Forms

Dynamic Forms

Controlling Flow with User Input

Accessing Form Data Using CGI.pm The param Method of CGI.pm Sticky Widgets

Validating Input from the Browser Command Line Debugging

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7. Loops The for Loop

The while Loop

break and continue

Reading Lines From Files Using Arrays with Loops

8. Special Variables

$$ – PID of Shell

Command-Line Arguments $# – Number of Arguments $* – All Arguments The shift Command The set Command Getting Options

9. Quoting Mechanisms

Single vs. Double Quotes What is a Here Document? Using a Here Document Here Document Quoting Ignoring Leading Tabs

10. Functions

Shell Functions

Passing Arguments to Functions Returning Values from Functions Function Declarations

11. Advanced Programming

Shell Arithmetic

The select Statement

Terminal Independence in Scripts The eval Command

12. Debugging Techniques

Using echo