CGI Programming with Perl

Accelebrate
Atlanta, Georgia, United States

Course Format: Classroom | E-learning | Virtual Class | Online | On-site | Blended | Self-paced

Course Description:

'' Perl is a powerful scripting language that has been popular for more than a decade. In this engaging, hands-on class, attendees learn how to use Perl CGI (Common Gateway Interface) scripts to develop database-driven Web applications.

CGI Programming with Perl Training Objectives
To learn the fundamentals of the Perl programming language and how it can be used to write Web-based applications
To master the use of the CGI.pm module, which greatly streamlines development of Perl CGI scripts
To discover how to use of the DBI.pm module and related DBD (driver) files with Perl to build database-driven applications

CGI Programming with Perl Training Outline
Introduction
Introducing Perl and CGI
Origins of the language
The difference between Perl and CGI
The relationship between Perl and HTML
Understanding the Web browser-Web server relationship
Installing and configuring Perl for your environment
Will be customized to Windows, MacOS X, Linux, Solaris, or another operating system based on the attendees’ server platform
Extending Perl’s functionality with modules
The roles of CGI.pm and DBI.pm
Perl building blocks
Perl data
Operations and functions
Quotation marks
Quoting without quotes
Statements, blocks, and scope
Declaring private variables
The "shebang" line
Creating a Perl CGI script
Creating output for a browser
Documenting your script
Checking the script’s syntax
Getting data from visitors (can be accelerated or skipped if attendees are fluently familiar with HTML forms)
Labeling incoming data
Creating a form
Creating:
Text boxes
Password fields
Text areas
Radio buttons
Check boxes
Select lists and menus
Submit and reset buttons
Image buttons
Specifying the action of the form
Understanding form methods: GET vs. POST
How your script processes data from a form
How your script processes data passed via a hyperlink
Environment variables
Your visitor’s browser and platform
Viewing available environment variables
Storing data from environment variables
Getting data into the script
Getting single-value form data
Getting multiple-value form data
Getting the names of all form elements
Retrieving values from each of these elements
Simple operations with scalar variables
What is a scalar variable?
Assigning a value to a scalar
Multiplying, dividing, adding, subtracting
Using more than one operators
Raising a number to an exponential power
Using mathematical functions
Concatenating (joining) strings
Repeating a string
Operating and assigning in one step
Incrementing or decrementing a variable
Conditionals and loops
Comparing numbers
Comparing strings
Evaluating conditions without comparisons
Testing two or more comparisons at a time
Creating a basic conditional statement
Adding options for false conditions
Adding multiple, independent conditions
Using unless
Loop structures:
while and until
for
foreach
Using break to exit a loop
Using continue to start the next iteration of a loop
Working with arrays
Assigning a list to an array variable
Referring to a particular item in an array
Referring to multiple items from an array
Using shift(), unshift(), push(), pop(), and splice() to add, remove, or replace items in an array
Using sort() and reverse() to change the order of an array
Using length() to determine how many elements are in the array
Subroutines
Why create subroutines?
Using a simple subroutine
Creating and calling subroutines
Processing values passed to a subroutine
Returning a value from a subroutine
Storing subroutines in a separate file
Loading subroutines from a separate file
Working with hashes
Why use hashes?
Assigning a list to a hash
Getting a value using a key
Adding or replacing a key-value pair
Getting several values using keys
Getting all of a hash’s keys
Getting all of a hash’s values
Getting each key and value in a hash
Getting pairs in a specified order
Removing key-value pairs
Analyzing data and validating form submissions
Why analyze data?
In-depth primer on regular expressions, which enable simple or complex patterns to be detected within text strings
Finding something
Finding and replacing
Seeing and using what was found
Splitting a value into pieces
Constructing search patterns
Matching a single character
Matching a string of characters
Matching a character from a group
Matching a character that’s not in the group
Using class shorthands
Advanced regular expression techniques
Form validation
Client-side, server-side, or both?
Defining validation rules and analyzing submitted data
Returning messages back to the user about whether their form submission is valid or invalid
Remembering what visitors tell you
Overview of strategies for maintaining user information and application state
Using hidden fields to store and pass data
Using cookies to store and pass data
Setting a cookie
Restricting a cookie by domain and/or path
Setting the expiration of a cookie
Requiring the presence of a secure connection
Retrieving and working with cookie values
What to do when a user’s browser refuses to accept a cookie
Formatting output
Formatting output with Perl
Creating a format pattern for integers
Creating a format pattern for non-integers
Creating a pattern for strings
Changing case
Changing characters
Finding the length of a string
Extracting one string from another
Cleaning up the end of a string
Formatting output with HTML
Overview of CGI.pm’s capabilities for automatically-generating HTML
Generating the HTTP header
Using start_html() to generate the document head
Concluding the page with end_html()
Dynamically generating text and tables of text
Dynamically generating hyperlinks and images
Dynamically generating forms
Styling output with CSS
Introduction to CGI/Perl security
Reading the security FAQs
The problem with visitor input
Protecting calls to the system
Limiting access to files
Using CGI.pm to limit incoming data
Keeping information to yourself
Avoiding tainted data
Cleaning and using outside data
Files and directories
Opening a file
Verifying file and directory operations
Writing to an external file
Getting exclusive access to a file
Reading data from an external file
Closing a file
Renaming or removing a file
Checking a file’s status
Opening, reading from, and closing directories
Changing the working directory
Creating a directory
Changing permissions from within a script
Removing a directory
Generating email messages from your scripts
Routing data from Perl to mail, sendmail, or another application or module that will mail it
Important security considerations
Adding file attachments
Processing file uploads
Why upload files via HTML forms?
Setting the enctype and method of the form to facilitate uploads
Defining one or more file fields in the form
Controlling where the uploaded file is saved
Preventing common security issues that can arise when saving uploaded files
Database connectivity: introducing the DBI module
Origins of DBI, the database interface module
DBI architecture
Overview of available DBDs (database drivers)
Setting up and configuring DBI and DBDs
Selecting records from the database via ad hoc queries
Building a SQL SELECT statement
Sending the SQL statement to the database for execution
Displaying a single ...''

Phone:+1 877 849 1850

School Address:

925B Peachtree Street, NE
PMB 378
Atlanta, GA 30309-3918
USA

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