improve websocket ping and remodel for rename datapoint

websocket/models/client.go

@@ -17,10 +17,10 @@ var Broadcast Clients = make(Clients)
 
 const (
 	// Time allowed to write a message to the peer.
-	writeWait = 10 * time.Second
+	writeWait = 30 * time.Second
 
 	// Time allowed to read the next pong message from the peer.
-	pongWait = 10 * time.Second
+	pongWait = 30 * time.Second
 
 	// Send pings to peer with this period. Must be less than pongWait.
 	pingPeriod = (pongWait * 9) / 10
@@ -34,6 +34,7 @@ type Client struct {
 	OnMessage  func(data []byte)
 	OnClose    func(code int, reason string)
 	OnError    func(err error)
+	OnWarning  func(warn string)
 	OnPing     func()
 	OnPong     func()
 	send       chan []byte
@@ -177,7 +178,15 @@ func (c *Client) SendResponse(data []byte) {
 	if !c.Connected {
 		return
 	}
-	c.send <- data
+	select {
+	case c.send <- data:
+		// sent successfully
+	default:
+		// channel full, drop or log
+		if c.OnWarning != nil {
+			c.OnWarning("Dropping message: channel full")
+		}
+	}
 }
 
 func (c *Client) Close(code int, reason string) error {