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package Plack::Middleware::BufferedStreaming;
use strict;
no warnings;
use Carp;
use Plack::Util;
use Scalar::Util qw(weaken);
use parent qw(Plack::Middleware);
sub call {
my ( $self, $env ) = @_;
my $caller_supports_streaming = $env->{'psgi.streaming'};
$env->{'psgi.streaming'} = Plack::Util::TRUE;
my $res = $self->app->($env);
return $res if $caller_supports_streaming;
if ( ref($res) eq 'CODE' ) {
my $ret;
$res->(sub {
my $write = shift;
if ( @$write == 2 ) {
my @body;
$ret = [ @$write, \@body ];
return Plack::Util::inline_object(
write => sub { push @body, $_[0] },
close => sub { },
);
} else {
$ret = $write;
return;
}
});
return $ret;
} else {
return $res;
}
}
1;
__END__
=head1 NAME
Plack::Middleware::BufferedStreaming - Enable buffering for non-streaming aware servers
=head1 SYNOPSIS
enable "BufferedStreaming";
=head1 DESCRIPTION
Plack::Middleware::BufferedStreaming is a PSGI middleware component
that wraps the application that uses C<psgi.streaming> interface to
run on the servers that do not support the interface, by buffering the
writer output to a temporary buffer.
This middleware doesn't do anything and bypass the application if the
server supports C<psgi.streaming> interface.
=head1 AUTHOR
Yuval Kogman
Tatsuhiko Miyagawa
=cut
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