Re: CGI Image on localhost

The following is a image slideshow demo I wrote not long ago. Save the script as 'p109.pl' under /cgi-bin.

#!C:/Perl/bin/perl.exe -w
use strict;
use CGI;

my $q = new CGI;
my $q_image = $q->param('image');

my $image_url = "/images";
my @images = map { /([^\/]+)$/ }
                 <../htdocs$image_url/*.jpg>;
$q_image = $images[0] if ! defined $q_image;


my $html = do { local $/; <DATA> };

$html =~ s/%%([^%]*)%%/
                    if ($1 eq "IMAGE") {
                        image_link()
                    } elsif ($1 eq "PREV") {
                        prev_link()
                    } else {
                        next_link()
                    } /ge;

print $q->header, $html;

sub image_link {
    return qq{<img src="$image_url/$q_image" alt="$q_image">};
}

sub prev_link {
    return qq{<a href='/cgi-bin/p109.pl?image=}.get_prev_image().qq{'>
+PREV</a>};
}

sub next_link {
    return qq{<a href='/cgi-bin/p109.pl?image=}.get_next_image().qq{'>
+NEXT</a>};
}

sub get_prev_image {
    my %hash = map { $images[$_] => $_ } 0..$#images;
    return $images[$hash{$q_image}-1];
}

sub get_next_image {
    my %hash = map { $images[$_] => $_ } 0..$#images;
    my $next = $hash{$q_image}+1;
    $next = 0 if $next > $#images;
    return $images[$next];
}

__DATA__
<HTML>
<TITLE>Simple Image Slideshow CGI in Perl</TITLE>
<BODY>
<TABLE align=center>
<tr><td align=center>%%PREV%%</td><td align=center>%%NEXT%%</td></tr>
<tr><td colspan=2>%%IMAGE%%</td></tr>
</TABLE>
</BODY>
</HTML>
[download]

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