NAME

       Net::IDN::Punycode - A Bootstring encoding of Unicode for IDNA (RFC 3492)

SYNOPSIS

         use Net::IDN::Punycode qw(:all);
         $punycode = encode_punycode($unicode);
         $unicode  = decode_punycode($punycode);

DESCRIPTION

       This module implements the Punycode encoding. Punycode is an instance of a more general
       algorithm called Bootstring, which allows strings composed from a small set of "basic"
       code points to uniquely represent any string of code points drawn from a larger set.
       Punycode is Bootstring with particular parameter values appropriate for IDNA.

       Note that this module does not do any string preparation as specified by
       Nameprep/IDNA2008/PRECIS and does not add nor remove the ACE prefix ("xn--"). Thus, use
       Net::IDN::Encode if you want to convert domain names.

WARNING

       Usually, it is not a good idea to use this module directly. If you convert domain labels
       (or other strings) without proper prepration, you may end up with an ASCII encoding that
       is not interoperable or even poses security issues due to spoofing.

       Even if you think that your domain names are valid and already mapped to the correct form,
       you might be fooled by different Unicode normalization forms (for example, some
       environments might automatically convert your data to NFD, which breaks IDNA).

FUNCTIONS

       No functions are exported by default. You can use the tag ":all" or import them
       individually.

       The following functions are available:

       encode_punycode($input)
           Encodes $input with Punycode and returns the result.

           This function will throw an exception on invalid/unencodable input.

       decode_punycode($input)
           Decodes $input with Punycode and returns the result.

           This function will throw an exception on invalid input.

AUTHORS

       Tatsuhiko Miyagawa <miyagawa@bulknews.net> (versions 0.01 to 0.02)

       Claus Faerber <CFAERBER@cpan.org> (versions 1.000 and higher)

LICENSE

       Copyright 2002-2004 Tatsuhiko Miyagawa <miyagawa@bulknews.net>

       Copyright 2007-2013 Claus Faerber <CFAERBER@cpan.org>

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.

SEE ALSO

       RFC 3492 (<http://www.ietf.org/rfc/rfc3492.txt>), IETF::ACE, Convert::RACE