Wedding list application

The Common Gateway Interface example from a Well House Consultants training course
More on The Common Gateway Interface [link]

This example is described in the following article(s):
• Danny and Donna are getting married - [link]

This example references the following resources:
http://www.wellho.net/resources/ex.php4?item=p403/wedlist
http://www.wellho.net/resources/ex.php4?item=p403/theywant.renew

Source code: wedlist Module: P403

#!/usr/bin/env perl

if ($ENV{QUERY_STRING}) {
        open (FH,"theywant.txt");
        chomp(@gimme = <FH>);
        foreach $item(split(/&/,$ENV{QUERY_STRING})) {
                $item =~ /(.*)=(.*)/;
                $row = $1;
                $whom = $2;
                $whom =~ tr/+/ /;
                $whom =~ s/%(..)/pack("C",$1)/eg;
                $whom and $gimme[$row] .= "\t$whom";
                }
        open (FH,">theywant.txt");
        print FH (join("\n",@gimme),"\n");
        }

print <<"HEAD";
content-type: text/html

<html>
<head><title>Danny and Donna's Wedding</title></head>
<body><h1>Be generous!</h1>
Danny and Donna are getting married ("not before time"
som of you may say) and are taking a round the world
trip for their honeymoon. Please be generous and buy
the a really LONG special trip ... remember - the more
you buy, the longer it will be before they're back!<br>
<form>
HEAD

open (FH,"theywant.txt");
$row = 0;
while (<FH>) {
        chop;
        ($gift,$buyer)=split(/\t/);
        if ($buyer) {
                print "$buyer has spoken for the $gift<br>";
        } else {
                print "If you want to buy $gift enter name:";
                print " <input name=$row size=40><br>";
                $opts++;
        }
        $row++;
}
if ($opts == 0) {
        print "Too late - everything's spoken for ... <br>";
        print "Wait - they want to go again ... submit the form anyway<br>";
        open (FH,"theywant.renew");
        @gimme = <FH>;
        open (FH,">theywant.txt");
        print FH @gimme;
        }

print <<"TAIL";
<input type=submit><br>
Danny and Donna thank you for your generosity and look forward
to seeing you at their wedding next year.<br><br>
Web Page by Graham Ellis, Well House Consultants
<hr>
<a href=http://www.wellho.net/resources/ex.php4?item=p403/wedlist>See Source Code</a><br>
<a href=http://www.wellho.net/resources/ex.php4?item=p403/theywant.renew>Text file</a><br>
</body></html>
TAIL

Learn about this subject

This module and example are covered on the following public courses:
* Deploying LAMP - Linux, Apache, MySQL, Perl/PHP
* Linux Web Server
* Using Perl on the Web
Also available on on site courses for larger groups

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