package idna

Import Path
	vendor/ (on

Dependency Relation
	imports 7 packages, and imported by 3 packages

Involved Source Files go118.go Package idna implements IDNA2008 using the compatibility processing defined by UTS (Unicode Technical Standard) #46, which defines a standard to deal with the transition from IDNA2003. IDNA2008 (Internationalized Domain Names for Applications), is defined in RFC 5890, RFC 5891, RFC 5892, RFC 5893 and RFC 5894. UTS #46 is defined in See for a visualization of the differences between these two standards. punycode.go tables15.0.0.go trie.go trie13.0.0.go trieval.go
Package-Level Type Names (total 12, in which 2 are exported)
/* sort exporteds by: | */
An Option configures a Profile at creation time. func BidiRule() Option func CheckHyphens(enable bool) Option func CheckJoiners(enable bool) Option func MapForLookup() Option func RemoveLeadingDots(remove bool) Option func StrictDomainName(use bool) Option func Transitional(transitional bool) Option func ValidateForRegistration() Option func ValidateLabels(enable bool) Option func VerifyDNSLength(verify bool) Option func New(o ...Option) *Profile
A Profile defines the configuration of an IDNA mapper. String reports a string with a description of the profile for debugging purposes. The string format may change with different versions. ToASCII converts a domain or domain label to its ASCII form. For example, ToASCII("bü") is "", and ToASCII("golang") is "golang". If an error is encountered it will return an error and a (partially) processed result. ToUnicode converts a domain or domain label to its Unicode form. For example, ToUnicode("") is "bü", and ToUnicode("golang") is "golang". If an error is encountered it will return an error and a (partially) processed result. *Profile : fmt.Stringer func New(o ...Option) *Profile var Display *Profile var Lookup *Profile var Punycode *Profile var Registration *Profile
Package-Level Functions (total 27, in which 13 are exported)
BidiRule enables the Bidi rule as defined in RFC 5893. Any application that relies on proper validation of labels should include this rule. This option corresponds to the CheckBidi flag in UTS #46.
CheckHyphens sets whether to check for correct use of hyphens ('-') in labels. Most web browsers do not have this option set, since labels such as "r3---sn-apo3qvuoxuxbt-j5pe" are in common use. This option corresponds to the CheckHyphens flag in UTS #46.
CheckJoiners sets whether to check the ContextJ rules as defined in Appendix A of RFC 5892, concerning the use of joiner runes. This option corresponds to the CheckJoiners flag in UTS #46.
MapForLookup sets validation and mapping options such that a given IDN is transformed for domain name lookup according to the requirements set out in Section 5 of RFC 5891. The mappings follow the recommendations of RFC 5894, RFC 5895 and UTS 46. It does not add the Bidi Rule. Use the BidiRule option to add this check. The mappings include normalization and mapping case, width and other compatibility mappings.
New creates a new Profile. With no options, the returned Profile is the most permissive and equals the Punycode Profile. Options can be passed to further restrict the Profile. The MapForLookup and ValidateForRegistration options set a collection of options, for lookup and registration purposes respectively, which can be tailored by adding more fine-grained options, where later options override earlier options.
RemoveLeadingDots removes leading label separators. Leading runes that map to dots, such as U+3002 IDEOGRAPHIC FULL STOP, are removed as well.
StrictDomainName limits the set of permissible ASCII characters to those allowed in domain names as defined in RFC 1034 (A-Z, a-z, 0-9 and the hyphen). This is set by default for MapForLookup and ValidateForRegistration, but is only useful if ValidateLabels is set. This option is useful, for instance, for browsers that allow characters outside this range, for example a '_' (U+005F LOW LINE). See for more details. This option corresponds to the UseSTD3ASCIIRules flag in UTS #46.
ToASCII is a wrapper for Punycode.ToASCII.
ToUnicode is a wrapper for Punycode.ToUnicode.
Transitional sets a Profile to use the Transitional mapping as defined in UTS #46. This will cause, for example, "ß" to be mapped to "ss". Using the transitional mapping provides a compromise between IDNA2003 and IDNA2008 compatibility. It is used by some browsers when resolving domain names. This option is only meaningful if combined with MapForLookup.
ValidateForRegistration sets validation options to verify that a given IDN is properly formatted for registration as defined by Section 4 of RFC 5891.
ValidateLabels sets whether to check the mandatory label validation criteria as defined in Section 5.4 of RFC 5891. This includes testing for correct use of hyphens ('-'), normalization, validity of runes, and the context rules. In particular, ValidateLabels also sets the CheckHyphens and CheckJoiners flags in UTS #46.
VerifyDNSLength sets whether a Profile should fail if any of the IDN parts are longer than allowed by the RFC. This option corresponds to the VerifyDnsLength flag in UTS #46.
Package-Level Variables (total 18, in which 4 are exported)
Display is the recommended profile for displaying domain names. The configuration of this profile may change over time.
Lookup is the recommended profile for looking up domain names, according to Section 5 of RFC 5891. The exact configuration of this profile may change over time.
Punycode is a Profile that does raw punycode processing with a minimum of validation.
Registration is the recommended profile for checking whether a given IDN is valid for registration, according to Section 4 of RFC 5891.
Package-Level Constants (total 48, in which 1 is exported)
UnicodeVersion is the Unicode version from which the tables in this package are derived.