+ unless ( $self->result_code() ) { #additional logging information
+ $self->error_message($col[3].
+ " DEBUG: No x_response_code from server, ".
+ "(HTTPS response: $server_response) ".
+ "(HTTPS headers: ".
+ join(", ", map { "$_ => ". $headers{$_} } keys %headers ). ") "
+ "(Raw HTTPS content: $page)"
+ );
+ }