perl - 我可以通过 Perl 确定给定的“主机名”是否是 CNAME

Question

在工作中我有这样的事情......

$ host www.something.com
www.something.com is an alias for some.other.address
some.other.address is an alias for one.more.address
one.more.address has address xxx.xxx.xxx.xxx

我想要一种方法，在 Perl 中输入www.something.com并确定它是否是 CNAME、A 记录等。

Answer 1

use Net::DNS qw();
my $query = Net::DNS::Resolver->new->search('conferences.yapceurope.org');

if ($query) {
    foreach my $rr ($query->answer) {
        next unless 'CNAME' eq $rr->type;
        print $rr->cname;
    }
} else {
    warn sprintf "query failed: %s\n", $res->errorstring;
}