Net::LibIDN(3pm)

1LibIDN(3)             User Contributed Perl Documentation            LibIDN(3)
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NAME

6       Net::LibIDN - Perl bindings for GNU Libidn
7

SYNOPSIS

9         use Net::LibIDN ':all';
10
11         idn_to_ascii("Räksmörgås.Josefßon.ORG") eq
12           idn_to_ascii(idn_to_unicode("xn--rksmrgs-5wao1o.josefsson.org"));
13
14         idn_prep_name("LibÜDN") eq "libüdn";
15
16         idn_punycode_encode("kistenmöhre") eq
17           idn_punycode_encode(idn_punycode_decode("kistenmhre-kcb"));
18
19         my $errpos;
20         tld_check("mèrle.se", $errpos) eq undef;
21           $errpos == 1;
22
23         tld_get("mainbase.mars") eq "mars";
24
25         my $hashref = Net::LibIDN::tld_get_table("de");
26
27         print "$hashref->{version}\n";
28         foreach (@{$hashref->{valid}})
29         {
30           print "Unicode range from ".$_->{start}." to ".$_->{end}."\n";
31         }
32

DESCRIPTION

34       Provides bindings for GNU Libidn, a C library for handling
35       Internationalized Domain Names according to IDNA (RFC 3490), in a way
36       very much inspired by Turbo Fredriksson's PHP-IDN.
37
38   Functions
39       Net::LibIDN::idn_to_ascii($clear_hostname, [$charset, [$flags]]);
40           Converts $clear_hostname which might contain characters outside the
41           range allowed in DNS names, to IDNA ACE. If $charset is specified,
42           treats string as being encoded in it, otherwise assumes it is
43           ISO-8859-1 encoded. If flag IDNA_ALLOW_UNASSIGNED is set in $flags,
44           accepts also unassigned Unicode characters, if
45           IDNA_USE_STD3_ASCII_RULES is set, accepts only ASCII LDH characters
46           (letter-digit-hyphen). Flags can be combined with ||. Returns
47           result of conversion or undef on error.
48
49       Net::LibIDN::idn_to_unicode($idn_hostname, [$charset, [$flags]]);
50           Converts ASCII $idn_hostname, which might be IDNA ACE encoded, into
51           the decoded form in $charset or ISO-8859-1. Flags are interpreted
52           as above. Returns result of conversion or undef on error.
53
54       Net::LibIDN::idn_punycode_encode($string, [$charset]);
55           Encodes $string into "punycode" (RFC 3492). If $charset is present,
56           treats $string as being in $charset, otherwise uses ISO-8859-1.
57           Returns result of conversion or undef on error.
58
59       Net::LibIDN::idn_punycode_decode($string, [$charset]);
60           Decodes $string from "punycode" (RFC 3492). If $charset is present,
61           result is converted to $charset, otherwise it is converted to
62           ISO-8859-1. Returns result of conversion or undef on error.
63
64       Net::LibIDN::idn_prep_name($string, [$charset]);
65       Net::LibIDN::idn_prep_kerberos5($string, [$charset]);
66       Net::LibIDN::idn_prep_node($string, [$charset]);
67       Net::LibIDN::idn_prep_resource($string, [$charset]);
68       Net::LibIDN::idn_prep_plain($string, [$charset]);
69       Net::LibIDN::idn_prep_trace($string, [$charset]);
70       Net::LibIDN::idn_prep_sasl($string, [$charset]);
71       Net::LibIDN::idn_prep_iscsi($string, [$charset]);
72           Performs "stringprep" (RFC 3454) on $string according to the named
73           profile (e.g. *_name -> "nameprep" (RFC 3491)).  If $charset is
74           present, converts from and to this charset before and after the
75           operation respectively. Returns result string, or undef on error.
76
77       Net::LibIDN::tdl_check($string, $errpos, [$charset, [$tld]]);
78           Checks whether or not $string conforms to the restrictions on the
79           sets of valid characters defined by TLD authorities around the
80           World. Treats $string as a hostname if $tld is not present,
81           determining the TLD from the hostname. If $tld is present, uses the
82           restrictions defined by the parties responsible for TLD $tld.
83           $charset may be used to specify the character set the $string is
84           in. Should an invalid character be detected, returns 0 and the
85           0-based position of the offending character in $errpos. In case of
86           other failure conditions, $errpos is not touched, and undef is
87           returned. Should $string conform to the TLD restrictions, 1 is
88           returned.
89
90       Net::LibIDN::tld_get($hostname);
91           Returns top level domain of $hostname, or undef if an error occurs
92           or if no top level domain was found.
93
94       Net::LibIDN::tld_get_table($tld);
95           Retrieves a hash reference with the TLD restriction info of given
96           TLD $tld, or undef if $tld is not found. The hash ref contains the
97           following fields:
98
99           ·   $h->{name} ... name of TLD
100
101           ·   $h->{version} ... version string of this restriction table
102
103           ·   $h->{nvalid} ... number of Unicode intervals
104
105           ·   $h->{valid} ...  [ {start => number, end => number}, ...] ...
106               Unicode intervals
107
108   Limitations
109       There is currently no support for Perl's unicode capabilities (man
110       perlunicode).  All input strings are assumed to be octet strings, all
111       output strings are generated as octet strings. Thus, if you require
112       Perl's unicode features, you will have to convert your strings
113       manually. For example:
114
115           use Encode;
116
117           use Data::Dumper;
118
119           print Dumper(Net::LibIDN::idn_to_unicode('xn--uro-j50a.com',
120           'utf-8'));
121
122           print Dumper(decode('utf-8',
123           Net::LibIDN::idn_to_unicode('xn--uro-j50a.com', 'utf-8')));
124

AUTHOR

126       Thomas Jacob, http://internet24.de
127

NAME

SYNOPSIS

DESCRIPTION

AUTHOR

SEE ALSO