Hi,
in your example code you do:
void FileDownloader::fileDownloaded(QNetworkReply* pReply)
{
qDebug()<<"Download successful!";
m_DownloadedData = pReply->readAll();
QFile file("D:\Test.jpg");
file.open(QIODevice::WriteOnly);
file.write(pReply->readAll());
//emit a signal
pReply->deleteLater();
emit downloaded();
}
the line “m_DownloadedData = pReply->readAll();” creates this issue,
after this line, the buffer of your network reply is empty, and the data is inside “m_DownloadedData”
a few lines lower, you try to save the image by doing: “file.write(pReply->readAll());”
but the buffer is already empty…
so you shoud do: “file.write( m_DownloadedData );”
i should do,
void FileDownloader::fileDownloaded(QNetworkReply* pReply)
{
qDebug()<<"Download successful!";
QFile file("D:\Test.jpg");
if( !file.open(QIODevice::WriteOnly) )
return; // file could not be created
file.write(pReply->readAll());
//emit a signal
pReply->deleteLater();
emit downloaded();
}
and remove the variable “m_DownloadedData”
for your second issue,
you also have to include the macro QML_DECLARE_TYPE(CLASSNAME)
in your header file, before you can use the qmlRegisterType method.
so:
//filedownloader.h
#ifndef FILEDOWNLOADER_H
#define FILEDOWNLOADER_H
#include <QtQml> // add for QML_DECLARE_TYPE macro !!!!!
#include <QObject>
#include <QByteArray>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
class FileDownloader : public QObject
{
Q_OBJECT
public:
explicit FileDownloader(QUrl imageUrl, QObject *parent = 0);
virtual ~FileDownloader();
QByteArray downloadedData() const;
signals:
void downloaded();
private slots:
void fileDownloaded(QNetworkReply* pReply);
private:
QNetworkAccessManager m_WebCtrl;
QByteArray m_DownloadedData;
};
QML_DECLARE_TYPE( FileDownloader ) // marco !!
#endif // FILEDOWNLOADER_H
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