add automatic localhost and local ip to allow origin

main.go

@@ -23,7 +23,7 @@ func main() {
 
 	//initialize new server
 	dbmHandler.Log.Debug("main", "initialize new server instance")
-	s := ws.NewServer(a.AllowOrigins)
+	s := ws.NewServer(a.AllowOrigins, 9000)
 
 	//set routes
 	dbmHandler.Log.Debug("main", "setting routes")

utils/utils.go

@@ -1,5 +1,10 @@
 package utils
 
+import (
+	"fmt"
+	"net"
+)
+
 func ListofA2ZZ() (list []string) {
 	for i := 'A'; i <= 'Z'; i++ {
 		list = append(list, string(i))
@@ -9,12 +14,21 @@ func ListofA2ZZ() (list []string) {
 			list = append(list, string(i)+string(j))
 		}
 	}
-	// for i := 'A'; i <= 'Z'; i++ {
-	// 	for j := 'A'; j <= 'Z'; j++ {
-	// 		for k := 'A'; k <= 'Z'; k++ {
-	// 			list = append(list, string(i)+string(j)+string(k))
-	// 		}
-	// 	}
-	// }
 	return
 }
+
+func GetLocalIP() (string, error) {
+	addrs, err := net.InterfaceAddrs()
+	if err != nil {
+		return "", err
+	}
+
+	for _, addr := range addrs {
+		if ipNet, ok := addr.(*net.IPNet); ok && !ipNet.IP.IsLoopback() {
+			if ipNet.IP.To4() != nil {
+				return ipNet.IP.String(), nil
+			}
+		}
+	}
+	return "", fmt.Errorf("no local IP address found")
+}

websocket/server.go

@@ -2,12 +2,14 @@ package websocket
 
 import (
 	"fmt"
+	"log"
 	"sync"
 	"time"
 
 	"github.com/gin-contrib/cors"
 	"github.com/gin-gonic/gin"
 	"github.com/tecamino/tecamino-dbm/cert"
+	"github.com/tecamino/tecamino-dbm/utils"
 	"github.com/tecamino/tecamino-logger/logging"
 )
 
@@ -19,8 +21,17 @@ type Server struct {
 }
 
 // initalizes new dbm server
-func NewServer(allowOrigins []string) *Server {
+func NewServer(allowOrigins []string, port uint) *Server {
 	r := gin.Default()
+
+	allowOrigins = append(allowOrigins, fmt.Sprintf("http://localhost:%d", port))
+
+	localIP, err := utils.GetLocalIP()
+	if err != nil {
+		log.Printf("get local ip : %s", err.Error())
+	} else {
+		allowOrigins = append(allowOrigins, fmt.Sprintf("http://%s:%d", localIP, port))
+	}
 	r.Use(cors.New(cors.Config{
 		AllowOrigins:     allowOrigins,
 		AllowMethods:     []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},