add write ping before pinghandler starts

websocket/models/client.go

@@ -20,7 +20,7 @@ const (
 	writeWait = 30 * time.Second
 
 	// Time allowed to read the next pong message from the peer.
-	pongWait = 30 * time.Second
+	pongWait = 40 * time.Second
 
 	// Send pings to peer with this period. Must be less than pongWait.
 	pingPeriod = (pongWait * 9) / 10
@@ -162,6 +162,10 @@ func (c *Client) PingInterval(interval time.Duration) {
 	ticker := time.NewTicker(interval)
 	defer ticker.Stop()
 
+	if err := c.conn.WriteControl(websocket.PingMessage, []byte("ping"), time.Now().Add(pongWait)); err != nil {
+		c.OnError(err)
+		return
+	}
 	for range ticker.C {
 		if c.OnPing != nil {
 			c.OnPing()