mesg-foundation/core

package xnet

import (
    "net"
    "strconv"
)

// Maximum and minimum ports number.
const (
    MinPort = 0
    MaxPort = 65535
)

// JoinHostPort combines host and port into a network address of the
// form "host:port" or, if host contains a colon or a percent sign,
// "[host]:port".
func JoinHostPort(host string, port int) string {
    return net.JoinHostPort(host, strconv.FormatInt(int64(port), 10))
}

// SplitHostPort splits a network address of the form "host:port",
// "host%zone:port", "[host]:port" or "[host%zone]:port" into host or
// host%zone and port.
func SplitHostPort(hostport string) (string, int, error) {
    host, portStr, err := net.SplitHostPort(hostport)
    if err != nil {
        return "", 0, err
    }

    port, err := strconv.ParseInt(portStr, 10, 64)
    if err != nil {
        return "", 0, &net.AddrError{Err: "can't parse port", Addr: hostport}
    }

    if port < MinPort || port > MaxPort {
        return "", 0, &net.AddrError{Err: "port out of range", Addr: hostport}
    }

    return host, int(port), nil
}