# -*- Mode: perl; tab-width: 4; indent-tabs-mode: nil; -*-
#
# This file is MPL/GPL dual-licensed under the following terms:
# 
# The contents of this file are subject to the Mozilla Public License
# Version 1.1 (the "License"); you may not use this file except in
# compliance with the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
# the License for the specific language governing rights and
# limitations under the License.
#
# The Original Code is PLIF 1.0.
# The Initial Developer of the Original Code is Ian Hickson.
#
# Alternatively, the contents of this file may be used under the terms
# of the GNU General Public License Version 2 or later (the "GPL"), in
# which case the provisions of the GPL are applicable instead of those
# above. If you wish to allow use of your version of this file only
# under the terms of the GPL and not to allow others to use your
# version of this file under the MPL, indicate your decision by
# deleting the provisions above and replace them with the notice and
# other provisions required by the GPL. If you do not delete the
# provisions above, a recipient may use your version of this file
# under either the MPL or the GPL.

package PLIF::Input::CGI::Head;
use strict;
use vars qw(@ISA);
use PLIF::Input::CGI;
@ISA = qw(PLIF::Input::CGI);
1;

sub applies {
    my $class = shift;
    return ($class->SUPER::applies(@_) and
            defined($ENV{'REQUEST_METHOD'}) and
            $ENV{'REQUEST_METHOD'} eq 'HEAD');
}

sub decodeHTTPArguments {
    my $self = shift;
    if (defined($ENV{'QUERY_STRING'})) {
        $self->dump(9, 'HTTP HEAD. Input was: ' . $ENV{'QUERY_STRING'});
        $self->splitURLEncodedForm($ENV{'QUERY_STRING'}, sub { $self->addArgument(@_); })
    } else {
        $self->dump(9, 'HTTP HEAD. No input.');
    }
    $self->app->addObject($self);
}

sub objectProvides {
    my $self = shift;
    my($service) = @_;
    return ($service eq 'output.filter' or 
            $self->SUPER::objectProvides($service));
}

sub filterOutput {
    my $self = shift;
    my($app, $session, $string) = @_;
    $string =~ s/\n\n.*$/\n\n/os; # strip out everything after the header
    return $string;
}

# return 1 if we are not allowed to have side effects
sub idempotent {
    return 1;
}