not show log by default

client.go

@@ -42,6 +42,7 @@ type ClientCommon struct {
 	heartbeatPeriod            time.Duration
 	wg                         stario.WaitGroup
 	netType                    NetType
+	showError                  bool
 	skipKeyExchange            bool
 	useHeartBeat               bool
 	sequenceDe                 func([]byte) (interface{}, error)
@@ -201,6 +202,12 @@ func (c *ClientCommon) Heartbeat() {
 	}
 }
 
+func (c *ClientCommon) ShowError(std bool) {
+	c.mu.Lock()
+	c.showError = std
+	c.mu.Unlock()
+}
+
 func (c *ClientCommon) readMessage() {
 	for {
 		select {
@@ -221,7 +228,9 @@ func (c *ClientCommon) readMessage() {
 			continue
 		}
 		if err != nil {
-			fmt.Println("client read error", err)
+			if c.showError {
+				fmt.Println("client read error", err)
+			}
 			c.alive.Store(false)
 			c.mu.Lock()
 			c.status = Status{
@@ -269,7 +278,9 @@ func (c *ClientCommon) loadMessage() {
 				//transfer to Msg
 				msg, err := c.sequenceDe(c.msgDe(c.SecretKey, data.Msg))
 				if err != nil {
-					fmt.Println("client decode data error", err)
+					if c.showError {
+						fmt.Println("client decode data error", err)
+					}
 					return
 				}
 				message := Message{
@@ -399,6 +410,8 @@ func (c *ClientCommon) sendWait(msg TransferMsg, timeout time.Duration) (Message
 		close(data.Reply)
 		c.noFinSyncMsgPool.Delete(data.TransferMsg.ID)
 		return Message{}, os.ErrDeadlineExceeded
+	case <-c.stopCtx.Done():
+		return Message{}, errors.New("Service shutdown")
 	case msg, ok := <-data.Reply:
 		if !ok {
 			return msg, os.ErrInvalid
@@ -420,6 +433,8 @@ func (c *ClientCommon) sendCtx(msg TransferMsg, ctx context.Context) (Message, e
 		close(data.Reply)
 		c.noFinSyncMsgPool.Delete(data.TransferMsg.ID)
 		return Message{}, os.ErrDeadlineExceeded
+	case <-c.stopCtx.Done():
+		return Message{}, errors.New("Service shutdown")
 	case msg, ok := <-data.Reply:
 		if !ok {
 			return msg, os.ErrInvalid