Ohh... nice little snippet. Building on this, you can use this snippit in the cgiapp_prerun method of a CGI::Application module to have all of your run modes cache-free. :) 
package TestApp;
use strict;
use warnings;
use base 'CGI::Application';
use POSIX;

sub setup {
    my $self = shift;
    $self->start_mode('index');
    $self->run_modes(index  =>  'TestAppIndex');
}

sub cgiapp_prerun {
    my $self = shift;
    $self->header_props(
        # date in the past
        -expires       => 'Sat, 26 Jul 1997 05:00:00 GMT',
        # always modified
        -Last_Modified => strftime('%a, %d %b %Y %H:%M:%S GMT', gmtime
+),
        # HTTP/1.0
        -Pragma        => 'no-cache',
        # HTTP/1.1
        -Cache_Control => join(', ', qw(
                no-store
                no-cache
                must-revalidate
                post-check=0
                pre-check=0
        )),
    );
}

sub TestAppIndex {
    return 'Hello, world!';
}
1;

[download]

In reply to Re: overkill anti-caching CGI headers by webratta
in thread overkill anti-caching CGI headers by Aristotle

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.