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Diffstat (limited to 'Master/tlpkg/tlperl/lib/URI/_idna.pm')
-rwxr-xr-x | Master/tlpkg/tlperl/lib/URI/_idna.pm | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/URI/_idna.pm b/Master/tlpkg/tlperl/lib/URI/_idna.pm new file mode 100755 index 00000000000..39366e5b831 --- /dev/null +++ b/Master/tlpkg/tlperl/lib/URI/_idna.pm @@ -0,0 +1,78 @@ +package URI::_idna; + +# This module implements the RFCs 3490 (IDNA) and 3491 (Nameprep) +# based on Python-2.6.4/Lib/encodings/idna.py + +use strict; +use URI::_punycode qw(encode_punycode decode_punycode); +use Carp qw(croak); + +my $ASCII = qr/^[\x00-\x7F]*\z/; + +sub encode { + my $idomain = shift; + my @labels = split(/\./, $idomain, -1); + my @last_empty; + push(@last_empty, pop @labels) if @labels > 1 && $labels[-1] eq ""; + for (@labels) { + $_ = ToASCII($_); + } + return join(".", @labels, @last_empty); +} + +sub decode { + my $domain = shift; + return join(".", map ToUnicode($_), split(/\./, $domain, -1)) +} + +sub nameprep { # XXX real implementation missing + my $label = shift; + $label = lc($label); + return $label; +} + +sub check_size { + my $label = shift; + croak "Label empty" if $label eq ""; + croak "Label too long" if length($label) > 63; + return $label; +} + +sub ToASCII { + my $label = shift; + return check_size($label) if $label =~ $ASCII; + + # Step 2: nameprep + $label = nameprep($label); + # Step 3: UseSTD3ASCIIRules is false + # Step 4: try ASCII again + return check_size($label) if $label =~ $ASCII; + + # Step 5: Check ACE prefix + if ($label =~ /^xn--/) { + croak "Label starts with ACE prefix"; + } + + # Step 6: Encode with PUNYCODE + $label = encode_punycode($label); + + # Step 7: Prepend ACE prefix + $label = "xn--$label"; + + # Step 8: Check size + return check_size($label); +} + +sub ToUnicode { + my $label = shift; + $label = nameprep($label) unless $label =~ $ASCII; + return $label unless $label =~ /^xn--/; + my $result = decode_punycode(substr($label, 4)); + my $label2 = ToASCII($result); + if (lc($label) ne $label2) { + croak "IDNA does not round-trip: '\L$label\E' vs '$label2'"; + } + return $result; +} + +1; |