47 lines
880 B
Go
47 lines
880 B
Go
package gemini
|
|
|
|
import (
|
|
"net"
|
|
"unicode/utf8"
|
|
|
|
"golang.org/x/net/idna"
|
|
)
|
|
|
|
func isASCII(s string) bool {
|
|
for i := 0; i < len(s); i++ {
|
|
if s[i] >= utf8.RuneSelf {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// punycodeHostname returns the punycoded version of hostname.
|
|
func punycodeHostname(hostname string) (string, error) {
|
|
if net.ParseIP(hostname) != nil {
|
|
return hostname, nil
|
|
}
|
|
if isASCII(hostname) {
|
|
return hostname, nil
|
|
}
|
|
return idna.Lookup.ToASCII(hostname)
|
|
}
|
|
|
|
// punycodeHost returns the punycoded version of host.
|
|
// host may contain a port.
|
|
func punycodeHost(host string) (string, error) {
|
|
hostname, port, err := net.SplitHostPort(host)
|
|
if err != nil {
|
|
hostname = host
|
|
port = ""
|
|
}
|
|
hostname, err = punycodeHostname(hostname)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if port == "" {
|
|
return hostname, nil
|
|
}
|
|
return net.JoinHostPort(hostname, port), nil
|
|
}
|