example

  sub your_handler {
      my $req = shift;
      $req->builder_options->{upload_tmp} = File::Temp->newdir;
      my $file = $req->upload('file');
      ...
  }

any options for File::Temp

  sub your_handler {
      my $req = shift;
      $req->builder_options->{upload_tmp} = File::Temp->newdir(
          'FOO_XXXX',
          DIR => '/tmp',
      );
      my $file = $req->upload('file');
      ...
  }

see File::Temp

like lazy option

  sub your_handler {
      my $req = shift;
      $req->builder_options->{upload_tmp} = sub { File::Temp->newdir };
      my $file = $req->upload('file');
      ...
  }

like keepalive option

  my $cache;
  sub your_handler {
      my $req = shift;
      $cache ||= File::Temp->newdir;
      $req->builder_options->{upload_tmp} = $cache;
      my $file = $req->upload('file');
      ...
  }

OLD SYNOPSIS

    my $mw = HTTP::Engine::Middleware->new;
    $mw->install( 'HTTP::Engine::Middleware::UploadTemp' => {
        keepalive => 0,          # generate temporary directory to 1 request only
        cleanup   => 1,          # CLEANUP option for File::Temp::tempdir
        tmpdir    => 1,          # TMPDIR option for File::Temp::tempdir
        base_dir  => '/tmp',     # DIR option for File::Temp::tempdir
        template  => 'FOO_XXXX', # template option for File::Temp::tempdir
        lazy      => 1,          # lazy generate for temporary directory
    });
    HTTP::Engine->new(
        interface => {
            module => 'YourFavoriteInterfaceHere',
            request_handler => $mw->handler( \&handler ),
        }
    )->run();