package xutil

import (
	"io"
	"net"
	"net/http"
)

// GetIntranetIP 获取内网 IP
func GetIntranetIP() string {
	addrs, err := net.InterfaceAddrs()
	if err != nil {
		return ""
	}
	for _, addr := range addrs {
		// 检查ip地址判断是否回环地址
		if ipnet, ok := addr.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				return ipnet.IP.String()
			}
		}
	}
	return ""
}

// GetExternalIP 获取公网 IP
func GetExternalIP() string {
	// http://icanhazip.com/
	resp, err := http.Get("http://myexternalip.com/raw")
	if err != nil {
		return ""
	}
	defer resp.Body.Close()
	b, _ := io.ReadAll(resp.Body)
	return string(b)
}