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package Web::Machine::Util::BodyEncoding;
# ABSTRACT: Module to handle body encoding
use strict;
use warnings;
our $VERSION = '0.17';
use Scalar::Util qw/ weaken isweak /;
use Encode ();
use Web::Machine::Util qw[ first pair_key pair_value ];
use Sub::Exporter -setup => {
exports => [qw[
encode_body_if_set
encode_body
]]
};
sub encode_body_if_set {
my ($resource, $response) = @_;
encode_body( $resource, $response ) if $response->body;
}
sub encode_body {
my ($resource, $response) = @_;
my $metadata = $resource->request->env->{'web.machine.context'};
my $chosen_encoding = $metadata->{'Content-Encoding'};
my $encoder = $resource->encodings_provided->{ $chosen_encoding };
my $chosen_charset = $metadata->{'Charset'};
my $charsetter;
if ( $chosen_charset && $resource->charsets_provided ) {
my $match = first {
my $name = $_ && ref $_ ? pair_key($_) : $_;
$name && $name eq $chosen_charset;
}
@{ $resource->charsets_provided };
$charsetter
= ref $match
? pair_value($match)
: sub { Encode::encode( $match, $_[1] ) };
}
$charsetter ||= sub { $_[1] };
push @{ $resource->request->env->{'web.machine.content_filters'} ||= [] },
sub {
my $chunk = shift;
weaken $resource unless isweak $resource;
return unless defined $chunk;
return $resource->$encoder($resource->$charsetter($chunk));
};
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Web::Machine::Util::BodyEncoding - Module to handle body encoding
=head1 VERSION
version 0.17
=head1 SYNOPSIS
use Web::Machine::Util::BodyEncoding;
=head1 DESCRIPTION
This handles the body encoding.
=head1 FUNCTIONS
=over 4
=item C<encode_body_if_set ( $resource, $response, $metadata )>
If the C<$response> has a body, this will call C<encode_body>.
=item C<encode_body ( $resource, $response, $metadata )>
This will find the right encoding (from the 'Content-Encoding' entry
in the C<$metadata> HASH ref) and the right charset (from the 'Charset'
entry in the C<$metadata> HASH ref), then find the right transformers
in the C<$resource>. After that it will attempt to convert the charset
and encode the body of the C<$response>. Once completed it will set
the C<Content-Length> header in the response as well.
B<CAVEAT:> Note that currently this subroutine doesn't do anything when the
body is returned as a CODE ref. This is a bug to be remedied in the future.
=back
=head1 SUPPORT
bugs may be submitted through L<https://github.com/houseabsolute/webmachine-perl/issues>.
=head1 AUTHORS
=over 4
=item *
Stevan Little <stevan@cpan.org>
=item *
Dave Rolsky <autarch@urth.org>
=back
=head1 COPYRIGHT AND LICENCE
This software is copyright (c) 2016 by Infinity Interactive, Inc.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
