go 获取本地ip地址

获取外网ip

package main

import (
	"fmt"
	"net"
	"os"
)

func main() {

	addrs, err := net.InterfaceAddrs()

	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	for _, address := range addrs {

		// 检查ip地址判断是否回环地址
		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				fmt.Println(ipnet.IP.String())
			}

		}
	}

}

改为方法调用

func getClientIp() (string ,error) {
	addrs, err := net.InterfaceAddrs()

	if err != nil {
		return err
	}

	for _, address := range addrs {
		// 检查ip地址判断是否回环地址
		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				return ipnet.IP.String()
			}

		}
	}

	return "", errors.New("Can not find the client ip address!")

}