NAME
Convert::RACE - Conversion between Unicode and RACE
SYNOPSIS
use Convert::RACE;
$domain = to_race($utf16str);
$utf16str = from_race($domain);
DESCRIPTION
This module provides functions to convert between RACE (Row-based ASCII-Compatible Encoding) and Unicode Encodings.
RACE converts strings with internationalized characters into strings of US-ASCII that are acceptable as host name parts in current DNS host naming usage.
See http://www.ietf.org/internet-drafts/draft-ietf-idn-race-03.txt for more details.
FUNCTION
Following functions are provided; they are all in @EXPORT array. See Exporter for details.
- to_race($utf16)
-
to_race() takes UTF-16 encoding and returns RACE-encoded strings such as 'bq--aewrcsy'.
This function throws an exception such as 'String includes no internationalized characters', 'String too long' and 'Invalid encoding to compress'. Exceptions are thrown with Carp::croak(), so you can cath 'em with eval {};
- from_race($domain_name)
-
from_race() takes 'bq--' prefixed string and returns original UTF-16 string.
This function throws an exception such as 'String not begin with bq--', 'Decoded string includes no internationalized characters' and ' Invalid format to decompress'. Exceptions are thrown with Carp::croak(), so you can cath 'em with eval {};
See Unicode::String, Unicode::Map8, Jcode for Unicode conversions.
CLASS METHOD
Following class methods are provided to change the behaviour of Convert::RACE.
EXAMPLES
use Jcode;
use Unicode::String 'latin1';
use Convert::RACE 'to_race';
# EUC-japanese here
$name = to_race(Jcode->new('ÆüËܸì','euc')->ucs2);
# or, Latin here
$name = to_race(latin1($latin_string)->utf16);
# in doubt of exception
eval { $name = to_race($utf); };
if ($@) {
warn "Can't encode to RACE: $@";
}
# change the prefix
Convert::RACE->prefix_tag('xx--');
BIG FAT CAVEAT
This module does NOT implement Nameprep phase. See mDNkit (http://www.nic.ad.jp/jp/research/idn/mdnkit/download/) for complete implementations.
AUTHOR
Tatsuhiko Miyagawa <[email protected]>, with much help from Eugen SAVIN <[email protected]>, Philip Newton <[email protected]>, Michael J Schout <[email protected]>.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
There comes NO WARRANTY with this module.
SEE ALSO
http://www.i-d-n.net/, http://www.ietf.org/internet-drafts/draft-ietf-idn-race-03.txt, RFC 1035, Unicode::String, Jcode, Convert::Base32.
1 POD Error
The following errors were encountered while parsing the POD:
- Around line 268:
Non-ASCII character seen before =encoding in 'to_race(Jcode->new('ÆüËܸì','euc')->ucs2);'. Assuming CP1252