Plack::Middleware::Proxy::Connect3pm

  use Plack::Builder;
  use Plack::App::Proxy;
  builder {
      enable "Proxy::Connect";
      enable sub {
          my $app = shift;
          return sub {
              my $env = shift;
              ($env->{'plack.proxy.url'} = $env->{REQUEST_URI}) =~ s|^/||;
              $app->( $env );
          };
      };
      Plack::App::Proxy->new->to_app;
  };