Esempio n. 1
0
// readPump reads from the websocket and sends to inbound channel.
// Expects to receive PONGs at specified interval, or logs an error and returns.
func (r *Remote) readPump(inbound chan<- []byte) {
	r.ws.SetReadDeadline(time.Now().Add(pongWait))
	r.ws.SetPongHandler(func(string) error { r.ws.SetReadDeadline(time.Now().Add(pongWait)); return nil })
	for {
		_, message, err := r.ws.ReadMessage()
		if err != nil {
			glog.Errorln(err)
			return
		}
		glog.V(2).Infoln(dump(message))
		r.ws.SetReadDeadline(time.Now().Add(pongWait))
		inbound <- message
	}
}
Esempio n. 2
0
// Consumes from the outbound channel and sends them over the websocket.
// Also sends PING messages at the specified interval.
// Returns when outbound channel is closed, or an error is encountered.
func (r *Remote) writePump(outbound <-chan interface{}) {
	ticker := time.NewTicker(pingPeriod)
	defer ticker.Stop()

	for {
		select {

		// An outbound message is available to send
		case message, ok := <-outbound:
			if !ok {
				r.ws.WriteMessage(websocket.CloseMessage, []byte{})
				return
			}

			b, err := json.Marshal(message)
			if err != nil {
				// Outbound message cannot be JSON serialized (log it and continue)
				glog.Errorln(err)
				continue
			}

			glog.V(2).Infoln(dump(b))
			if err := r.ws.WriteMessage(websocket.TextMessage, b); err != nil {
				glog.Errorln(err)
				return
			}

		// Time to send a ping
		case <-ticker.C:
			if err := r.ws.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
				glog.Errorln(err)
				return
			}
		}
	}
}