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#include "downloadManager.h"
//#include <QDir>
#include <QFileInfo>
#include <QVariant>
#include <QByteArray>
int downloadManager::downloaded = 0;
// ----------------------------------------------------------------------------------------
downloadManager::downloadManager()
{
qnam = new QNetworkAccessManager();
dip = false;
// the whole QDir thing is questionable..
downloadDir = QDir(downloadPath);
// Check if downloadPath exists, if not create it.
if (!downloadDir.exists()){
if (debug) qDebug() << "Download directory: " << downloadDir.path() << "doesn't exist.";
QDir::current().mkdir(downloadPath);
if (downloadDir.exists() && debug)
qDebug() << "Created download directory: " << downloadDir.path();
}
else if (debug) qDebug() << "Download directory: " << downloadDir.path() << "exists.";
}
// ----------------------------------------------------------------------------------------
void downloadManager::downloadFile(QString& filename){
if (debug) qDebug() << "Received downloadFile signal for:" << filename;
QUrl fileUrl;
fileUrl = baseURL.resolved(QUrl(filename));
qDebug() << "fileUrl: " << fileUrl;
this->processDownloadRequest(fileUrl);
}
// ----------------------------------------------------------------------------------------
void downloadManager::downloadFile(QUrl& fileUrl){
if (debug) qDebug() << "Received downloadFile signal for:" << fileUrl;
this->processDownloadRequest(fileUrl);
}
// ----------------------------------------------------------------------------------------
void downloadManager::processDownloadRequest(QUrl& url)
{
// Test on empty URL in case such a call happens, which should not
// happen given how javascriptInterface::startDownload(..) is implemented.
if (url.isEmpty()){
if (debug) qDebug() << "No URL specified for download.";
return;
}
// If download in progress, enqueue file and return.
if (dip)
{
if (debug) qDebug() << "Download in progress! Enqueueing:" << url.toString()
<< "(" << dlQ.size() << "in queue)";
dlQ.enqueue(url);
return;
}
// No running downloads: enqueue and start next download.
dlQ.enqueue(url);
if (debug) qDebug() << "Enqueueing:" << url.toString() << endl;
startNextDownload();
}
// ----------------------------------------------------------------------------------------
void downloadManager::startNextDownload()
{
if (dlQ.isEmpty())
{
emit downloadQueueEmpty();
if (debug) qDebug() << "Download manager ready. (1)";
return;
}
if (debug) qDebug() << "Starting next download: " << dlQ.head().toString()
<< "(" << dlQ.size() << "in queue.)";
// Dequeue next URL to download.
QUrl url = dlQ.dequeue();
// Get temporary filename from URL.
QString tmp = url.path();
tmp.remove(0, tmp.lastIndexOf(QChar('/')) + 1);
if (debug) qDebug() << "Extracted " << tmp << "from " << url.toString();
// temp file name will be renamed to the filename parsed from the
// header ("Content-Disposition" --> filename)
outfile.setFileName(downloadPath + "/" + tmp);
if (!outfile.open(QIODevice::WriteOnly))
{
if (debug) qDebug() << "Couldn't open file! Skipping...";
return;
}
QNetworkRequest request(url);
currentDownload = qnam->get(request);
if (currentDownload->error() != QNetworkReply::NoError)
{
if (debug) qDebug() << "Network reply error, skipping download...";
return;
}
currentProgress = 0;
dip = true;
QObject::connect(currentDownload, SIGNAL(readyRead()), this, SLOT(downloadReady()));
QObject::connect(currentDownload, SIGNAL(downloadProgress(qint64, qint64)),
this, SLOT(downloadProgress(qint64, qint64)));
QObject::connect(currentDownload, SIGNAL(finished()), this, SLOT(downloadFinished()));
}
// ----------------------------------------------------------------------------------------
// Private slots
// ----------------------------------------------------------------------------------------
// This slot listens to readyRead() emmited when data is available for reading.
void downloadManager::downloadReady()
{
// this is done every signal call atm, to fix...
const QByteArray cd = "Content-Disposition";
QByteArray cdc = currentDownload->rawHeader(cd);
cdc.chop(1);
int x = cdc.indexOf("filename=\"") + 10;
cdc.remove(0, x);
// End file name = cdc.
currentTargetFilename = cdc;
// readyRead() fired, so save the readable data.
outfile.write(currentDownload->readAll());
}
// ----------------------------------------------------------------------------------------
// This triggers sends the update progress back to the site.
void downloadManager::downloadProgress(qint64 bytesIn, qint64 bytesTotal)
{
if (debug) qDebug() << "Download progress of " << currentDownload->url().toString()
<< ": " << bytesIn << "/" << bytesTotal;
int tmp = ((bytesIn * 100) / bytesTotal);
if (tmp > currentProgress){
currentProgress = tmp;
emit updateProgress(currentDownload->url().toString(), tmp);
}
// Progress difference < 1%
return;
}
// ----------------------------------------------------------------------------------------
// This slot listens to the finished() which is emmited
// when all the data from the reply has been read.
void downloadManager::downloadFinished()
{
// Close output file.
outfile.close();
QString tmp = outfile.fileName();
tmp.remove(0, tmp.lastIndexOf(QChar('/')) + 1);
qDebug() << "Trying to rename " << tmp << " to --> " << currentTargetFilename;
if (outfile.rename(downloadPath + "/" + currentTargetFilename)) {
if (debug) qDebug() << "Renamed file!";
}
else {
if (debug) qDebug() << "Failure to rename file!";
}
currentDownload->deleteLater();
downloaded++;
dip = false;
if (debug) qDebug() << "Download of " << currentDownload->url().toString()
<< "finished. (dlcount = "<< downloaded << ")";
// If queue is empty, we are done.
if (dlQ.isEmpty()){
emit downloadQueueEmpty();
if (debug) qDebug() << "Download manager ready. (2)";
return;
}
// Queue not empty: initialise next download.
startNextDownload();
}
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