fix: fixing panic on pong write message

v1/client/client.go

@@ -220,19 +220,6 @@ func (wsClient *SafeWebsocketClient) connect() error {
 		return fmt.Errorf("failed to connect to %s: %w", wsClient.baseHost, err)
 	}
 
-	conn.SetPingHandler(func(pingData string) error {
-		if err := conn.WriteMessage(websocket.PongMessage, []byte(pingData)); err != nil {
-			if err == websocket.ErrCloseSent {
-				return nil
-			}
-			if netErr, ok := err.(interface{ Timeout() bool }); ok && netErr.Timeout() {
-				return nil
-			}
-			return err
-		}
-		return nil
-	})
-
 	pingCtx, pingCancel := context.WithCancel(context.Background())
 	wsClient.mu.WriteHandler(func() error {
 		wsClient.cancelFuncs = append(wsClient.cancelFuncs, pingCancel)
@@ -260,18 +247,24 @@ func (wsClient *SafeWebsocketClient) connect() error {
 			return nil
 		})
 
+		var c *websocket.Conn
+		wsClient.mu.ReadHandler(func() error {
+			c = conn
+			return nil
+		})
+
 		for {
 			select {
 			case <-ctx.Done():
 				log.Println("Writer stopped due to client shutdown")
 				return
 			case data := <-wsClient.writeChan:
-				if conn == nil {
+				if c == nil {
 					wsClient.triggerReconnect()
 					return
 				}
 
-				if err := conn.WriteMessage(int(data.MessageType), data.Data); err != nil {
+				if err := c.WriteMessage(int(data.MessageType), data.Data); err != nil {
 					log.Printf("error on write message: %v\n", err)
 					wsClient.triggerReconnect()
 					return
@@ -287,22 +280,28 @@ func (wsClient *SafeWebsocketClient) connect() error {
 			return nil
 		})
 
+		var c *websocket.Conn
+
+		wsClient.mu.ReadHandler(func() error {
+			c = conn
+			return nil
+		})
+		if c == nil {
+			wsClient.triggerReconnect()
+			return
+		}
 		for {
 			select {
 			case <-ctx.Done():
 				log.Println("Reader stopped due to client shutdown")
 				return
 			default:
-				if conn == nil {
-					wsClient.triggerReconnect()
-					return
-				}
-				if err := conn.SetReadDeadline(time.Now().Add(readDeadline)); err != nil {
+				if err := c.SetReadDeadline(time.Now().Add(readDeadline)); err != nil {
 					log.Printf("error on read deadline: %v\n", err)
 					return
 				}
 
-				messageType, data, err := conn.ReadMessage()
+				messageType, data, err := c.ReadMessage()
 				if err != nil {
 					log.Printf("error on read message: %v\n", err)
 					wsClient.triggerReconnect()
@@ -324,6 +323,23 @@ func (wsClient *SafeWebsocketClient) connect() error {
 		}
 	}()
 
+	conn.SetPingHandler(func(pingData string) error {
+		wsClient.writeChan <- Message{
+			MessageType: MessageTypePong,
+			Data:        []byte(pingData),
+		}
+		// if err := conn.WriteMessage(websocket.PongMessage, []byte(pingData)); err != nil {
+		// 	if err == websocket.ErrCloseSent {
+		// 		return nil
+		// 	}
+		// 	if netErr, ok := err.(interface{ Timeout() bool }); ok && netErr.Timeout() {
+		// 		return nil
+		// 	}
+		// 	return err
+		// }
+		return nil
+	})
+
 	return nil
 }