if ( -f $file_hdr_raw ){
   open(RAW, "<$file_hdr_raw") or plog("Can NOT open <$SHA1_file_hdr_raw> for reading\n");
   my(@lines) = <RAW>;
   close(RAW);
   while ( @lines ){
      my $line = shift(@lines);
      my ($key, $value) = split(/:/, $line, 2);
      $headers->header( $key => $value );
      }
}
			    
# create response
    my $res = HTTP::Response->new($status_code, $status, $headers, $content);

# send back (short-circuit normal content fetching)
    $self->proxy()->response($res);