chmike

// Please use the package https://github.com/chmike/domain as is it maintained up to date with tests. 

// checkDomain returns an error if the domain name is not valid.
// See https://tools.ietf.org/html/rfc1034#section-3.5 and
// https://tools.ietf.org/html/rfc1123#section-2.
func checkDomain(name string) error {
	switch {
	case len(name) == 0:
		return nil // an empty domain name will result in a cookie without a domain restriction
	case len(name) > 255: