Golang获取本地ip

func GetLocalIP() string {
	ip := "127.0.0.1"
	addrs, err := net.InterfaceAddrs()
	if err != nil {
		return ip
	}
	for _, a := range addrs {
		if ipnet, ok := a.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				ip = ipnet.IP.String()
				break
			}
		}
	}
	return ip
}