Get My IP Golang

myip.go

package main

/*
URL: https://github.com/mccoyst/myip/blob/master/myip.go
URL: http://changsijay.com/2013/07/28/golang-get-ip-address/
*/

import (
	"net"
	"os"
)

func main() {
	addrs, err := net.InterfaceAddrs()
	if err != nil {
		os.Stderr.WriteString("Oops: " + err.Error() + "\n")
		os.Exit(1)
	}

	for _, a := range addrs {
		if ipnet, ok := a.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				os.Stdout.WriteString(ipnet.IP.String() + "\n")
			}
		}
	}
}

Might be easier to do something like this:

package main

import "net"

func main() {
    conn, err := net.Dial("udp", "8.8.8.8:80")
    // handle err...

     defer conn.Close()
     localAddr := conn.LocalAddr().(*net.UDPAddr)
}

This will give you the primary IP address used by your system (great for machines that have multiple ips, interfaces etc).

China cannot access google dns 8.8.8.8

Does not matter, its a UDP connection therefore there is no handshake, works offline

Thanks! very simple and powerful!

Thanks! very simple and powerful!

牛批的很