v3 - main to cut out

pkg/utils/get_server_ip.go

@@ -0,0 +1,26 @@
+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.Error())
+	}
+
+	defer conn.Close()
+	localAddr := conn.LocalAddr().(*net.UDPAddr)
+	ServerIP = localAddr.IP.String()
+}