Open-IM-Server/pkg/utils/get_server_ip.go

package utils

import (
	"Open_IM/pkg/common/config"
	"net"
)

var ServerIP = ""

func init() {
	//fixme In the configuration file, ip takes precedence, if not, get the valid network card ip of the machine
	if config.Config.ServerIP != "" {
		ServerIP = config.Config.ServerIP
		return
	}

	// see https://gist.github.com/jniltinho/9787946#gistcomment-3019898
	conn, err := net.Dial("udp", "8.8.8.8:80")
	if err != nil {
		panic(err)
	}

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