diff --git a/sysmodule/netmodule/wsmodule/WSModule.go b/sysmodule/netmodule/wsmodule/WSModule.go
index 163b4ef..ba2dd43 100644
--- a/sysmodule/netmodule/wsmodule/WSModule.go
+++ b/sysmodule/netmodule/wsmodule/WSModule.go
@@ -119,7 +119,6 @@ func (ws *WSModule) recyclerReaderBytes([]byte) {
 func (ws *WSModule) NewWSClient(conn *network.WSConn) network.Agent {
 	ws.mapClientLocker.Lock()
 	defer ws.mapClientLocker.Unlock()
-
 	pClient := &WSClient{wsConn: conn, id: primitive.NewObjectID().Hex()}
 	pClient.wsModule = ws
 	ws.mapClient[pClient.id] = pClient
@@ -159,6 +158,22 @@ func (ws *WSModule) GetProcessor() processor.IRawProcessor {
 	return ws.process
 }
 
+func (ws *WSModule) GetClientHeader(clientId string,key string) string {
+	ws.mapClientLocker.Lock()
+	defer ws.mapClientLocker.Unlock()
+
+	pClient, ok := ws.mapClient[clientId]
+	if ok == false || pClient.wsConn == nil {
+		return ""
+	}
+	
+	if pClient.wsConn.GetHeader() == nil {
+		log.Warn("clientId header is nil", log.String("clientId", clientId))
+	}
+
+	return pClient.wsConn.GetHeader().Get(key)
+}
+
 func (ws *WSModule) GetClientIp(clientId string) string {
 	ws.mapClientLocker.Lock()
 	defer ws.mapClientLocker.Unlock()
diff --git a/util/blueprint/graph.go b/util/blueprint/graph.go
index 5f91e7a..9413e96 100644
--- a/util/blueprint/graph.go
+++ b/util/blueprint/graph.go
@@ -144,7 +144,7 @@ func (gc *graphConfig) GetNodeByID(nodeID string) *nodeConfig {
 
 func (gr *Graph) GetAndCreateReturnPort() IPort {
 	p, ok := gr.globalVariables[ReturnVarial]
-	if ok {
+	if ok && p != nil {
 		return p
 	}
 
@@ -168,6 +168,8 @@ func (gr *Graph) Do(entranceID int64, args ...any) (Port_Array, error) {
 
 	if gr.globalVariables == nil {
 		gr.globalVariables = map[string]IPort{}
+	}else {
+		gr.globalVariables[ReturnVarial] = nil
 	}
 
 	err := entranceNode.Do(gr, args...)