void MainWindow::Pobierz()
{   manager = new QNetworkAccessManager(this);

    connect(manager, SIGNAL(finished(QNetworkReply*)),
            this, SLOT(replyFinished(QNetworkReply*)));
    //manager->get(QNetworkRequest(QUrl("http://www.nbp.pl/kursy/xml/LastA.xml")));
     manager->get(QNetworkRequest(QUrl("https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml")));


}

void MainWindow::replyFinished (QNetworkReply *reply)
{
     if (reply->error() == QNetworkReply::NoError)
        {

        QString filename = "walutkiy.xml";
          QFile file(filename);
         // Trying to open in WriteOnly and Text mode
         if(!file.open(QFile::WriteOnly |
         QFile::Text))
         {
         qDebug() << " Could not open file for writing";
         return;
         }
         // To write text, we use operator<<(),
         // which is overloaded to take
         // a QTextStream on the left
         // and data types (including QString) on the right
         QTextStream out(&file);
          out<<reply->readAll();
         file.flush();
         file.close();
       //  file.open(QIODevice::ReadOnly);
         //   doc.setContent(&file);
         //   file.close();

        }
        else
        {

            ui->komunikat_2->setText("nie dziala error przy pobieraniu");
        }

reply->deleteLater();

}