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package Plack::Middleware::FixMissingBodyInRedirect;
use strict;
use warnings;
use parent qw( Plack::Middleware );
use Plack::Util;
use HTML::Entities;
use Scalar::Util qw(blessed);
# ABSTRACT: Plack::Middleware which sets body for redirect response, if it's not already set
our $VERSION = '0.12';
sub call {
my $self = shift;
return $self->response_cb($self->app->(@_), sub {
my $res = shift;
return unless $res->[0] >= 300 && $res->[0] < 400;
my $headers = Plack::Util::headers($res->[1]); # first index contains HTTP header
if( $headers->exists('Location') ) {
my $location = $headers->get("Location");
# checking if body (which is at index 2) is set or not
if (@$res == 3 && !_is_body_set($res->[2])) {
my $body = $self->_default_html_body($location);
$res->[2] = [$body];
my $content_length = Plack::Util::content_length([$body]);
$headers->set('Content-Length' => $content_length);
$headers->set('Content-Type' => 'text/html; charset=utf-8');
return;
}
elsif (@$res == 2 || blessed($res->[2])) {
if(! $headers->exists('Content-Type')) {
$headers->set('Content-Type' => 'text/html; charset=utf-8')
}
my $done;
return sub {
my $chunk = shift;
return $chunk if $done;
if (!defined $chunk) {
$done = 1;
return $self->_default_html_body($location);
}
elsif (length $chunk) {
$done = 1;
}
return $chunk;
};
}
}
});
}
sub _default_html_body {
my ($self_or_class, $location) = @_;
my $encoded_location = encode_entities($location);
return <<"EOF";
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Moved</title>
</head>
<body>
<p>This item has moved <a href="$encoded_location">here</a>.</p>
</body>
</html>
EOF
}
sub _is_body_set {
my $body = shift;
if (ref $body eq 'ARRAY') {
return grep { defined && length } @$body;
}
elsif (Plack::Util::is_real_fh($body) && -f $body && -z _) {
return 0;
}
return 1;
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Plack::Middleware::FixMissingBodyInRedirect - Plack::Middleware which sets body for redirect response, if it's not already set
=head1 VERSION
version 0.12
=head1 SYNOPSIS
use strict;
use warnings;
use Plack::Builder;
my $app = sub { ... };
builder {
enable "FixMissingBodyInRedirect";
$app;
};
=head1 DESCRIPTION
This module sets body in redirect response, if it's not already set.
=head1 CONTRIBUTORS
John Napiorkowski <jjn1056@yahoo.com>
Graham Knop <haarg@haarg.org>
n0body, Mark Ellis <m@rkellis.com>
ether, Karen Etheridge <ether@cpan.org>
=head1 AUTHOR
Upasana <me@upasana.me>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by Upasana.
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
|
