Download Progress of the html-content of the webpage

Hello!

I want to watch the download progress of the html-content of the webpage. I use for it the QProgressBar.

But this function receives -1 for bytesTotal:

Code:

void Dialog::replyProgress(qint64 bytesReceived, qint64 bytesTotal)
{
    ui->progressBar->setValue( bytesReceived );
    ui->progressBar->setMaximum( bytesTotal );
 
    qDebug() << bytesReceived;
    qDebug() << bytesTotal;
}

This is my module which gets content from the webpage:

Code:

#ifndef DOWNLOADER_H
#define DOWNLOADER_H
 
#include <memory>
 
#include <QObject>
#include <QString>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QNetWorkAccessManager>
 
class Downloader : public QObject
{
    Q_OBJECT
 
public:
 
    void fetch( const QString &url )
    {
        m_reply.reset(m_manager->get( QNetworkRequest( QUrl( url ) ) ) );
        connect( m_reply.get( ), SIGNAL( finished( ) ),
                 this, SLOT( replyFinished( ) ) );
        connect( m_reply.get( ), SIGNAL( downloadProgress( qint64, qint64 ) ),
                 this, SLOT( slotDownloadProgress(qint64, qint64 ) ) );
    }
 
signals:
    void signalWithContent( QString * );
    void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);
 
private slots:
    void replyFinished( )
    {
        QByteArray data = m_reply->readAll( );
        QString content( data );
        emit signalWithContent( &content );
    }
 
    void slotDownloadProgress( qint64 bytesReceived, qint64 bytesTotal )
    {
        emit downloadProgress( bytesReceived, bytesTotal );
    }
 
private:
    std::shared_ptr<QNetworkAccessManager> m_manager =
            std::make_shared<QNetworkAccessManager>( this );
 
    std::shared_ptr<QNetworkReply> m_reply;
};
 
#endif // DOWNLOADER_H