How I'm creating a filehandle for my script

gistfile1.txt

  post '/upload' => sub 	{
  
  my $self = shift; 
  $self = $self->inactivity_timeout(3600);
  
  my $upload_path = "download/";
  my $filename = $upload_path . $upload->filename;
  $upload->move_to($filename);
  
  my $file_handle =  new FileHandle($filename);  
  my $report = Tools::Report->new( {'file_handle' => $file_handle} ); #Object
  die $report unless ref $report;
  
  $self->stash( report => $report ); #ObjRef
  $self->render('upload');
};