IO::Socket::SSL::PublicSuffix - provide access to Mozilla's list of effective TLD names


    # use builtin default
    use IO::Socket::SSL::PublicSuffix;
    $ps = IO::Socket::SSL::PublicSuffix->default;
    # load from string
    $ps = IO::Socket::SSL::PublicSuffix->from_string("*.uk\n*");
    # load from file or file handle
    $ps = IO::Socket::SSL::PublicSuffix->from_file($filename);
    $ps = IO::Socket::SSL::PublicSuffix->from_file(\*STDIN);
    # --- string in -> string out
    # $rest ->
    # $tld  ->
    my ($rest,$tld) = $ps->public_suffix('');
    my $tld = $ps->public_suffix('');
    # $root_domain ->
    my $root_domain = $ps->public_suffix('', 1);
    # --- array in -> array out
    # $rest -> [qw(whatever host)]
    # $tld  -> [qw(co uk)]
    my ($rest,$tld) = $ps->public_suffix([qw(whatever host co uk)]);
    # To update this file with the current list:
    perl -MIO::Socket::SSL::PublicSuffix -e 'IO::Socket::SSL::PublicSuffix::update_self_from_url()'


This module uses the list of effective top level domain names from the mozilla project to determine the public top level domain for a given hostname.



Returns object with builtin default. min_suffix can be given in %args to specify the minimal suffix, default is 1.


Returns object with configuration from string. See method default for %args.

class->from_file( file name| file handle, %args )

Returns object with configuration from file or file handle. See method default for %args.

$self->public_suffix( $host|\@host, [ $add ] )

In array context the function returns the non-tld part and the tld part of the given hostname, in scalar context only the tld part. It adds $add parts of the non-tld part to the tld, e.g. with $add=1 it will return the root domain.

If there were no explicit matches against the public suffix configuration it will fall back to a suffix of length 1.

The function accepts a string or an array-ref (e.g. host split by .). In the first case it will return string(s), in the latter case array-ref(s).

International hostnames or labels can be in ASCII (IDNA form starting with xn--) or unicode. In the latter case an IDNA handling library like Net::IDN:::Encode, Net::LibIDN or recent versions of URI need to be installed.


Returns true if IDN support is available.



Domain::PublicSuffix, Mozilla::PublicSuffix


 Q: Why yet another module, we already have L<Domain::PublicSuffix> and
 A: Because the public suffix data change more often than these modules do,
    IO::Socket::SSL needs this list and it is more easy this way to keep it


Steffen Ullrich