获取Golang公网IP

package main

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

func main() {
	resp, err := http.Get("https://api.ipify.org")
	if err != nil {
		fmt.Println("Error:", err)
		return
	}
	defer resp.Body.Close()

	ip, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println("Error:", err)
		return
	}

	fmt.Println("Public IP:", string(ip))
}

package main

import (
	"fmt"
	"net"
)

func main() {
	conn, err := net.Dial("udp", "8.8.8.8:80")
	if err != nil {
		fmt.Println("Error:", err)
		return
	}
	defer conn.Close()

	localAddr := conn.LocalAddr().(*net.UDPAddr)

	fmt.Println("Public IP:", localAddr.IP)
}