Beispiel #1
0
func pumpStdout(ws *websocket.Conn, r io.Reader, done chan struct{}) {
	defer func() {
		ws.Close()
		close(done)
	}()
	s := bufio.NewScanner(r)
	for s.Scan() {
		ws.SetWriteDeadline(time.Now().Add(writeWait))
		if err := ws.WriteMessage(websocket.TextMessage, s.Bytes()); err != nil {
			break
		}
	}
	if s.Err() != nil {
		log.Println("scan:", s.Err())
	}
}
Beispiel #2
0
func writer(ws *websocket.Conn, lastMod time.Time) {
	lastError := ""
	pingTicker := time.NewTicker(pingPeriod)
	fileTicker := time.NewTicker(filePeriod)
	defer func() {
		pingTicker.Stop()
		fileTicker.Stop()
		ws.Close()
	}()
	for {
		select {
		case <-fileTicker.C:
			var p []byte
			var err error

			p, lastMod, err = readFileIfModified(lastMod)

			if err != nil {
				if s := err.Error(); s != lastError {
					lastError = s
					p = []byte(lastError)
				}
			} else {
				lastError = ""
			}

			if p != nil {
				ws.SetWriteDeadline(time.Now().Add(writeWait))
				if err := ws.WriteMessage(websocket.TextMessage, p); err != nil {
					return
				}
			}
		case <-pingTicker.C:
			ws.SetWriteDeadline(time.Now().Add(writeWait))
			if err := ws.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
				return
			}
		}
	}
}