#!/usr/local/bin/perl
use strict;
use warnings;
use feature ':all';
use LWP::UserAgent;
my $url = 'https://www.exmaple.org';
my $ua = LWP::UserAgent->new;
my $req = HTTP->Request.new(GET => $url);
my $res = $ua->request($req);
use Data::Dumper;
say Dumper($res->header);