QNetworkRequest atribute

[mero]

How can I set atribute of network request ?
I use this:

...
    QNetworkRequest request;
    request.setUrl(QUrl(strUrl));
    request.setAttribute(QNetworkRequest::User, strTest1);
    request.setAttribute(QNetworkRequest::UserMax, strCategory);
    accessManager->get(request);
...
 
... net_finished(QNetworkReply *reply)
{
    reply->deleteLater();
 
    if (reply->error())
        return;
 
    QString strTest1 = reply->attribute(QNetworkRequest::User).toString();
    QString strCategory = reply->attribute(QNetworkRequest::UserMax).toString();
    QByteArray bData = reply->readAll();
...

...
    QNetworkRequest request;
    request.setUrl(QUrl(strUrl));
    request.setAttribute(QNetworkRequest::User, strTest1);
    request.setAttribute(QNetworkRequest::UserMax, strCategory);
    accessManager->get(request);
...

... net_finished(QNetworkReply *reply)
{
    reply->deleteLater();

    if (reply->error())
        return;

    QString strTest1 = reply->attribute(QNetworkRequest::User).toString();
    QString strCategory = reply->attribute(QNetworkRequest::UserMax).toString();
    QByteArray bData = reply->readAll();
...

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but in net_finished strTest1 and strCategory is empty .. why ?