Perl - The Common Gateway Interface

Perl module P403

The Common Gateway Interface

Exercises, examples and other material relating to training module P403. This topic is presented on public courses Deploying LAMP - Linux, Apache, MySQL, Perl/PHP, Linux Web Server, Using Perl on the Web

Deploying LAMP - Linux, Apache, MySQL Perl / PHP / Python - training course - Installing and supporting applications under Open Source technologies

Deploying LAMP - Linux, Apache, MySQL Perl / PHP / Python - Installing and supporting applications under Open Source technologies This course is intended ...

http://www.wellho.net/course/alfull.html [course]

Using Perl on the Web - training course - CGI, mod-Perl, and other standards. Sessions, cookies, content management, etc.

Using Perl on the Web - CGI, mod-Perl, and other standards. Sessions, cookies, content management, etc. This advanced course takes the Perl programmer ...

http://www.wellho.net/course/pwfull.html [course]

Linux Web Server - training course - Using your Linux system as a Web server with LAMP

Linux Web Server - Using your Linux system as a Web server with LAMP The major part of this course covers the installation and the configuration of the ...

http://www.wellho.net/course/lwfull.html [course]

Handling nasty characters - Perl, PHP, Python, Tcl, Lua

Are your writing or maintaining a web based application that uses forms? If so, you have better be aware of some of the nasty characters that are around! ...

http://www.wellho.net/mouth/2238_Han ... l-Lua.html [short article]

Perl and the Common Gateway Interface - out of fashion but still very useful?

Is the Common Gateway Interface dead? No - it isn't; although my first choice for a new web application these days would be something else (PHP, Java ...

http://www.wellho.net/mouth/2551_Per ... eful-.html [short article]

CGI v mod_perl

Just debunking a couple of myths today ... CGI (Common Gateway Interface) scripts are run on a web server computer under the control of a piece of web ...

http://www.wellho.net/mouth/45_CGI-v-mod-perl.html [short article]

URL decoding - training example

#!/bin/perl -- -*-perl-*- # form that decodes user entry # collect values from form $userdata = $ENV{"QUERY_STRING"}; ($field,$value) = ($userdata =~ ...

http://www.wellho.net/resources/ex.php4?item=p403/formurl.pl [code sample]

Applications often interface to the web through "CGI" Ð the Common Gateway Interface. This module introduces the fundamentals of CGI and how it's used within server-based Perl programs, taking special care to cover issues such as the security of the inputs and the handling and checking of data no matter what the user of your publicly visible website should enter.

This topic is presented on public courses Deploying LAMP - Linux, Apache, MySQL, Perl/PHP, Linux Web Server, Using Perl on the Web

Examples from our training material

area.pl	Single page ruggedised CGI form
first.html	First HTML page to call up CGI script
firstform.html	A first web form
formone.cgi	Running a script when a form has been submitted
formurl.pl	URL decoding - training example
logone.pl	Filtering an access log file from a browser
mydate.cgi	CGI first example - menu based on day of week
mypage.htp	HTML template for shoots.pl demo
perlcycle.pl	cycling through images using CGI
rf1.pl	Looking up an "A Road" - test program
roadfinder.pl	Looking up an "A road" on a web site
seedcalc.pl	Shows structure of a CGI script
seeding.html	Sample form - two boxes to submit to a CGI script
shoots.pl	CGI script - sets up form, also handles form response, in a single page
theywant.renew	Wedding list data
wedlist	Wedding list application
whc_filter.pm	utilities for CGI use
withval.cgi	CGI page with some data validation

Pictures

CGI scripting practical

Background information

Some modules are available for download as a sample of our material or under an Open Training Notes License for free download from http://www.training-notes.co.uk.

Topics covered in this module

The mechanism of the web.
The need for Server Side Programming.
The structure of the server.
Static documents.
Executable programs.
Your first CGI program.
Error Handling.
Use perl -c.
Check with your ISP.
Forms.
Error handling.
URL Encoding.
Input.
Output.

Complete learning

If you are looking for a complete course and not just a information on a single subject, visit our Listing and schedule page.

Well House Consultants specialise in training courses in Python, Perl, PHP, and MySQL. We run Private Courses throughout the UK (and beyond for longer courses), and Public Courses at our training centre in Melksham, Wiltshire, England. It's surprisingly cost effective to come on our public courses - even if you live in a different country or continent to us.

We have a technical library of over 700 books on the subjects on which we teach. These books are available for reference at our training centre. Also available is the Opentalk Forum for discussion of technical questions.