Method handleMasterReadEvent

thirdparty/gotty/webtty/webtty.go:201–257

(data []byte)

}

func (wt *WebTTY) handleMasterReadEvent(data []byte) error {
	if len(data) == 0 {
		return errors.New("unexpected zero length read from master")
	}

	switch data[0] {
	case Input:
		if !wt.permitWrite {
			return nil
		}

		if len(data) <= 1 {
			return nil
		}
		_, err := wt.slave.Write(data[1:])
		if err != nil {
			return errors.Wrapf(err, "failed to write received data to slave")
		}

	case Ping:
		err := wt.masterWrite([]byte{Pong})
		wt.lastPingTime = time.Now()
		if err != nil {
			return errors.Wrapf(err, "failed to return Pong message to master")
		}

	case ResizeTerminal:
		if wt.columns != 0 && wt.rows != 0 {
			break
		}

		if len(data) <= 1 {
			return errors.New("received malformed remote command for terminal resize: empty payload")
		}

		var args argResizeTerminal
		err := json.Unmarshal(data[1:], &args)
		if err != nil {
			return errors.Wrapf(err, "received malformed data for terminal resize")
		}
		rows := wt.rows
		if rows == 0 {
			rows = int(args.Rows)
		}

		columns := wt.columns
		if columns == 0 {
			columns = int(args.Columns)
		}

		return wt.slave.ResizeTerminal(columns, rows)
	default:
		return errors.Errorf("unknown message type `%c`", data[0])
	}

	return nil
}