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package Plack::Middleware::Runtime;
use strict;
use parent qw(Plack::Middleware);
use Plack::Util;
use Plack::Util::Accessor qw(header_name);
use Time::HiRes;
sub call {
my($self, $env) = @_;
my $start = [ Time::HiRes::gettimeofday ];
my $res = $self->app->($env);
my $header = $self->header_name || 'X-Runtime';
$self->response_cb($res, sub {
my $res = shift;
my $req_time = sprintf '%.6f', Time::HiRes::tv_interval($start);
Plack::Util::header_set($res->[1], $header, $req_time);
});
}
1;
__END__
=head1 NAME
Plack::Middleware::Runtime - Sets an X-Runtime response header
=head1 SYNOPSIS
enable "Runtime";
=head1 DESCRIPTION
Plack::Middleware::Runtime is a Plack middleware component that sets
the application's response time (in seconds) in the I<X-Runtime> HTTP response
header.
=head1 OPTIONS
=over 4
=item header_name
Name of the header. Defaults to I<X-Runtime>.
=back
=head1 AUTHOR
Tatsuhiko Miyagawa
=head1 SEE ALSO
L<Time::HiRes> Rack::Runtime
=cut
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