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%# BEGIN BPS TAGGED BLOCK {{{
%#
%# COPYRIGHT:
%#
%# This software is Copyright (c) 1996-2025 Best Practical Solutions, LLC
%# <sales@bestpractical.com>
%#
%# (Except where explicitly superseded by other copyright notices)
%#
%#
%# LICENSE:
%#
%# This work is made available to you under the terms of Version 2 of
%# the GNU General Public License. A copy of that license should have
%# been provided with this software, but in any event can be snarfed
%# from www.gnu.org.
%#
%# This work is distributed in the hope that it will be useful, but
%# WITHOUT ANY WARRANTY; without even the implied warranty of
%# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%# General Public License for more details.
%#
%# You should have received a copy of the GNU General Public License
%# along with this program; if not, write to the Free Software
%# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
%# 02110-1301 or visit their web page on the internet at
%# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html.
%#
%#
%# CONTRIBUTION SUBMISSION POLICY:
%#
%# (The following paragraph is not intended to limit the rights granted
%# to you to modify and distribute this software under the terms of
%# the GNU General Public License and is only of importance to you if
%# you choose to contribute your changes and enhancements to the
%# community by submitting them to Best Practical Solutions, LLC.)
%#
%# By intentionally submitting any modifications, corrections or
%# derivatives to this work, or any other work intended for use with
%# Request Tracker, to Best Practical Solutions, LLC, you confirm that
%# you are the copyright holder for those contributions and you grant
%# Best Practical Solutions, LLC a nonexclusive, worldwide, irrevocable,
%# royalty-free, perpetual, license to use, copy, create derivative
%# works based on those contributions, and sublicense and distribute
%# those contributions and any derivatives thereof.
%#
%# END BPS TAGGED BLOCK }}}
<%INIT>
# Since data in the DB can change at any time, the default headers
# for dynamic content (content generated from most Mason templates) is:
#
# Cache-control: no-cache
# Pragma: no-cache
# Expires: [a short time in the past to account for any time drift]
my $cache_control = 'no-cache';
my $expires = RT::Date->new(RT->SystemUser);
$expires->SetToNow;
if ( $MaxAgeSeconds && !RT->Config->Get('WebStrictBrowserCache') ) {
$expires->AddSeconds($MaxAgeSeconds);
# Expires is an older header and has been superseded by Cache-control
# and max-age, so set that also. New browsers will use max-age and
# ignore Expires.
# We're allowing a short cache, so replace no-cache with max-age.
$cache_control = "max-age=$MaxAgeSeconds, private"
}
else {
# Setting Expires to 0, a common approach to "immediately expired"
# doesn't send an Expires header from Mason, so set a little in the past.
$expires->AddSeconds(-30);
$cache_control .= ', max-age=0';
}
# Pragma is deprecated and usually ignored if Cache-control is sent.
# Should only be used by HTTP/1.0 clients.
$r->headers_out->{'Pragma'} = 'no-cache' if $cache_control eq 'no-cache';
$r->headers_out->{'Expires'} = $expires->RFC2616;
if ( RT->Config->Get('WebStrictBrowserCache') ) {
# Instruct the browser not to cache or store anything
$cache_control .= ', no-store, must-revalidate, s-maxage=0';
}
$r->headers_out->{'Cache-control'} = $cache_control;
$m->callback( %ARGS, CallbackName => 'End' );
</%INIT>
<%ARGS>
$MaxAgeSeconds => undef # Time in seconds to allow for cache
</%ARGS>
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