fix: max connection error code and added missing reason

identification/identifier.go

@@ -10,5 +10,5 @@ type Identifier struct {
 }
 
 func (i Identifier) String() string {
-	return fmt.Sprintf("connection [%s] %s", i.Group, i.ID)
+	return fmt.Sprintf("[%s] %s", i.Group, i.ID)
 }

services/rest/websocket/connection/upgrader.go

@@ -69,17 +69,18 @@ func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request) (Conn, error)
 	}
 	err = u.Table.Store(identifier)
 	if errors.Is(err, errConnDuplicated) {
-		duplicateConnResp := createEmptyErrorResponse(pb.Code_CODE_MAX_USER_LIMIT_REACHED)
+		errMsg := fmt.Sprintf("%s: %s,", err.Error(), identifier)
+		duplicateConnResp := createEmptyErrorResponse(pb.Code_CODE_MAX_USER_LIMIT_REACHED, errMsg)
 
 		conn.WriteMessage(websocket.BinaryMessage, duplicateConnResp)
-		conn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(1008, "Duplicate connection"))
+		conn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(1008, "duplicate connection: "+identifier.ID))
 		metrics.Increment("user_connection_failure_total", fmt.Sprintf("reason=exists,conn_group=%s", identifier.Group))
 		conn.Close()
-		return Conn{}, fmt.Errorf("disconnecting %s: already connected", identifier)
+		return Conn{}, fmt.Errorf("disconnecting connection %s: already connected", identifier)
 	}
 	if errors.Is(err, errMaxConnectionReached) {
 		logger.Errorf("[websocket.Handler] Disconnecting %v, max connection reached", identifier)
-		maxConnResp := createEmptyErrorResponse(pb.Code_CODE_MAX_USER_LIMIT_REACHED)
+		maxConnResp := createEmptyErrorResponse(pb.Code_CODE_MAX_CONNECTION_LIMIT_REACHED, err.Error())
 		conn.WriteMessage(websocket.BinaryMessage, maxConnResp)
 		conn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(1008, "Max connection reached"))
 		metrics.Increment("user_connection_failure_total", fmt.Sprintf("reason=serverlimit,conn_group=%s", identifier.Group))
@@ -130,12 +131,12 @@ func (u *Upgrader) newIdentifier(h http.Header) identification.Identifier {
 	}
 }
 
-func createEmptyErrorResponse(errCode pb.Code) []byte {
+func createEmptyErrorResponse(errCode pb.Code, errMsg string) []byte {
 	resp := pb.SendEventResponse{
 		Status:   pb.Status_STATUS_ERROR,
 		Code:     errCode,
 		SentTime: time.Now().Unix(),
-		Reason:   "",
+		Reason:   errMsg,
 		Data:     nil,
 	}
 	duplicateConnResp, _ := proto.Marshal(&resp)

services/rest/websocket/handler.go

@@ -71,7 +71,7 @@ func (h *Handler) Table() *connection.Table {
 func (h *Handler) HandlerWSEvents(w http.ResponseWriter, r *http.Request) {
 	conn, err := h.upgrader.Upgrade(w, r)
 	if err != nil {
-		logger.Debugf("[websocket.Handler] %v", err)
+		logger.Errorf("[websocket.Handler] %v", err)
 		return
 	}
 	defer conn.Close()