File Coverage

blib/lib/Net/Domain/Registration/Check.pm

Criterion	Covered	Total	%
statement	23	42	54.7
branch	0	10	0.0
condition	0	3	0.0
subroutine	8	9	88.8
pod	0	1	0.0
total	31	65	47.6

package Net::Domain::Registration::Check;

use 5.006;
use strict;
use warnings;
use utf8;
use Carp;
use Net::DNS;
use Net::Domain::TLD qw(tld_exists);
use base qw(Exporter);

our @EXPORT = qw(domain_on_parent);



=head1 NAME

Net::Domain::Registration::Check - Fast check on availability of domain registration

=head1 VERSION

Version 0.01

=cut

our $VERSION = '0.01';


=head1 SYNOPSIS

This module takes a quick check on domain registration, if the domain is available or not.

It doesn't query to whois server, just checks if domain exists on its parent nameservers.

So it gets a quick check.

For domain which is redemptionPeriod status, it does not get listed on parent nameservers, but you can't register it from the registrar this time. See: https://icann.org/epp#redemptionPeriod

It doesn't make sense on second-level ccTLDs, such as com.cn, co.uk etc. For IANA official root zone DB please see: https://www.iana.org/domains/root/db

该模块用来快速检查域名是否可以被注册。

它并不查询whois服务器，而是检查该域名是否存在于父一级的名字服务器上。

所以它的查询非常迅速，远快于whois.

某些待删除的域名处于redemptionPeriod状态，它确实不存在于父一级名字服务器上，但是这个时候你还不能注册。请见：https://icann.org/epp#redemptionPeriod

请注意：该模块并不能查询到ccTLD里，各国自己设置的二级域名，比如com.cn，co.uk。IANA官方定义的顶级域名gTLD和国家级域名ccTLD请见：https://www.iana.org/domains/root/db


    use Net::Domain::Registration::Check;

	print domain_on_parent($domain) ? "domain has been taken" : "domain may not be taken";



=head1 EXPORT

This module exports only one method, domain_on_parent(), to check if domain exists on its parent nameservers.

该模块输出唯一的方法，domain_on_parent()，用来检查域名是否存在于父一级名字服务器上。


=cut

sub domain_on_parent {

	my $domain = shift || croak "no domain provided";
	my $tld;

	if ($domain =~ /^(.*?)\.(.*)$/) {
        $tld = $2;
	}

	croak "domain TLD not exists" unless tld_exists($tld);

	my $res = Net::DNS::Resolver->new;
    my $answer = $res->query($tld, 'NS');
	my @nameservers;

    if (defined $answer) {
        my @rr= $answer->answer;
        for (@rr) {
            my $ns = $_->rdatastr;
			push @nameservers, $ns;
        }
    }

    $res  = Net::DNS::Resolver->new(nameservers => [@nameservers]);
    $answer = $res->send($domain);

    if ( $answer->header->rcode eq 'NXDOMAIN' ) {
        return 0;
    } elsif ( $answer->header->rcode eq 'NOERROR') {
        return 1;
    } else {
       croak "unsure on domain status: $answer->header->rcode";
    }
}


=head1 AUTHOR

Peng Yonghua

=head1 BUGS

Please report any bugs or feature requests to , I will respond it quickly.




=head1 SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc Net::Domain::Registration::Check


You can also look for information at:

=over 4

=item * RT: CPAN's request tracker (report bugs here)

L

=item * AnnoCPAN: Annotated CPAN documentation

L

=item * CPAN Ratings

L

=item * Search CPAN

L

=back


=head1 ACKNOWLEDGEMENTS


=head1 LICENSE AND COPYRIGHT

Copyright 2017 Peng Yonghua.

This program is free software; you can redistribute it and/or modify it
under the terms of the the Artistic License (2.0). You may obtain a
copy of the full license at:

L

Any use, modification, and distribution of the Standard or Modified
Versions is governed by this Artistic License. By using, modifying or
distributing the Package, you accept this license. Do not use, modify,
or distribute the Package, if you do not accept this license.

If your Modified Version has been derived from a Modified Version made
by someone other than you, you are nevertheless required to ensure that
your Modified Version complies with the requirements of this license.

This license does not grant you the right to use any trademark, service
mark, tradename, or logo of the Copyright Holder.

This license includes the non-exclusive, worldwide, free-of-charge
patent license to make, have made, use, offer to sell, sell, import and
otherwise transfer the Package with respect to any patent claims
licensable by the Copyright Holder that are necessarily infringed by the
Package. If you institute patent litigation (including a cross-claim or
counterclaim) against any party alleging that the Package constitutes
direct or contributory patent infringement, then this Artistic License
to you shall terminate on the date that such litigation is filed.

Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER
AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY
YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR
CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


=cut

1; # End of Net::Domain::Registration::Check