validate_domain: Comprehensive domain name validation

In punycoder: Unicode and Punycode Domain Name Processing

Comprehensive domain name validation

Description

Validates domain names according to RFC standards, checking for proper format, length restrictions, and character requirements. Supports both Unicode and ASCII domain names.

Usage

validate_domain(x, strict = getOption("punycoder.strict", TRUE))

Arguments

x	Character vector of domain names to validate
strict	Logical; whether to apply strict validation. Defaults to getOption("punycoder.strict", TRUE).

Value

An object of class "punycoder_validation" (a named list) with components:

domains

Character vector of the input domain names.

valid

Logical vector indicating whether each domain is valid.

errors

List of character vectors, each containing error messages for the corresponding domain (empty for valid domains).

error_codes

List of character vectors, each containing stable machine-readable error codes for the corresponding domain (empty for valid domains). Missing input uses "domain_na".

See Also

puny_encode for encoding validated domains.

Examples

validate_domain("example.com")
validate_domain("caf\u00E9.example.com")
long_label <- paste(rep("x", 250), collapse = "")
validate_domain(c("valid.com", "invalid..com", long_label))

punycoder documentation built on July 20, 2026, 1:07 a.m.