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View Full Version : Anything I can use before unsupportedContent signal?



linxlad
10th December 2012, 16:46
I am looking for a way to fire the downloadProgress(qint64,qint64) signal to display download progress before all the file bytes are received and the unsupportedContent() is emitted. I get a pause and then it goes straight to unsupportedContent() but I need to intercept the reply as it's happening.

There is a QWebPage::downloadRequested() signal but that only works on right click -> save link as...

Any suggestions?


void MainWindow::unsupportedContent(QNetworkReply *reply) {

qDebug() << "Left click - download!";
qDebug() << "Bytes to download: " << reply->bytesAvailable();

QString str = reply->rawHeader("Content-Disposition");

QString end = str.mid(21);
end.chop(1);

qDebug() << "File name: " << end;
qDebug() << "File type: " << reply->rawHeader("Content-Type");
qDebug() << "File size (bytes): " << reply->bytesAvailable();
QString defaultFileName = QFileInfo(end).fileName();
QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"), defaultFileName);
if (fileName.isEmpty()) return;

file = new QFile(fileName);
if(!file->open(QIODevice::WriteOnly))
{
QMessageBox::information(this, "Downloader",
tr("Unable to save the file %1: %2.")
.arg(fileName).arg(file->errorString()));
delete file;
file = NULL;
return;
}

downloadRequestAborted = false;

connect(reply, SIGNAL(finished()), this, SLOT(downloadFinished()));
connect(reply, SIGNAL(readyRead()), this, SLOT(downloadReadyRead()));
connect(reply, SIGNAL(downloadProgress(qint64,qint64)), this, SLOT(downloadProgress(qint64,qint64)));
connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));
progressDialog->setLabelText(tr("Downloading %1...").arg(fileName));
//downloadButton->setEnabled(false);
progressDialog->exec();


//QFile file(fileName);
//file.open( QIODevice::WriteOnly );
//file.write(reply->read(reply->bytesAvailable()));
//file.close();
}

void MainWindow::downloadProgress(qint64 bytesReceived, qint64 bytesTotal)
{
qDebug() << bytesReceived << bytesTotal;
if(downloadRequestAborted)
return;
progressDialog->setMaximum(bytesTotal);
progressDialog->setValue(bytesReceived);
}

void MainWindow::downloadReadyRead()
{
if(file)
file->write(reply->read(reply->bytesAvailable()));
}

void MainWindow::downloadFinished()
{
qDebug() << "Download finished!";
if(downloadRequestAborted)
{
if(file)
{
file->close();
file->remove();
delete file;
file = NULL;
}
reply->deleteLater();
progressDialog->hide();
//downloadButton->setEnabled(true);
return;
}

downloadReadyRead();
progressDialog->hide();
//downloadButton->setEnabled(true);
file->flush();
file->close();

if(reply->error())
{
//Download failed
QMessageBox::information(this, "Download failed", tr("Failed: %1").arg(reply->errorString()));
}

reply->deleteLater();
reply = NULL;
delete file;
file = NULL;
}

void MainWindow::cancelDownload()
{
downloadRequestAborted = true;
reply->abort();
progressDialog->hide();
//downloadButton->setEnabled(true);
}