Module punycode

punycode international domain name conversion module

Punycode is a character encoding scheme defined by RFC 3492 mainly used for internationalized domain names. Because the host name in the URL is limited to ASCII characters, host names including non-ASCII characters must be converted to ASCII using the punycode algorithm.

Instructions:

1
var punycode = require('punycode');

static function

encode

Convert a Unicode string to an equivalent Punycode string containing only ASCII characters

1
static String punycode.encode(String domain);

Call parameters:

• domain: String, given Unicode string

Return results:

• String, returns the encoded Punycode string containing only ASCII characters.

---

decode

Convert a Punycode string to the equivalent Unicode string

1
static String punycode.decode(String domain);

Call parameters:

• domain: String, given Unicode string

Return results:

• String, returns the decoded Unicode string

---

toASCII

Converts a Unicode string representing a domain name to a string containing only ASCII characters. Only non-ASCII strings representing portions of domain names are converted. In other words, if you call a string that has been converted to ASCII, there is no problem.

1
static String punycode.toASCII(String domain);

Call parameters:

• domain: String, given Unicode string

Return results:

• String, returns the encoded ASCII string

---

toUnicode

Converts a Punycode string representing a domain name to a Unicode string. Only the Punycode string representing the portion of the domain name will be converted. In other words, if you call a string that has been converted to Unicode, there is no problem.

1
static String punycode.toUnicode(String domain);

Call parameters:

• domain: String, given ASCII string

Return results:

• String, returns the decoded Unicode string