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#include "downloadManager.h"
#include "fbgui.h"
#include <QFileInfo>
#include <QByteArray>
int downloadManager::downloaded = 0;
// ----------------------------------------------------------------------------------------
downloadManager::downloadManager()
{
//logView->write(QString("testing @ DM init"));
qnam = new QNetworkAccessManager();
dip = false;
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));
if (debug) 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)
{
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);
/* check if filename exists on target file system */
QFileInfo fi(downloadPath + "/" + tmp);
if (fi.exists()){
QString qs = QString(fi.absoluteFilePath() + ".\%1").arg(downloaded);
outfile.setFileName(qs);
}
else
outfile.setFileName(downloadPath + "/" + tmp);
if (!outfile.open(QIODevice::WriteOnly)){
if (debug) qDebug() << "Couldn't open file! Skipping...";
return;
}
/* send the request for the file */
QNetworkRequest request(url);
currentDownload = qnam->get(request);
lastProgress = 0;
currentProgress = 0;
dip = true;
dltime.start();
QObject::connect(currentDownload, SIGNAL(readyRead()), this, SLOT(downloadReady()));
QObject::connect(currentDownload, SIGNAL(metaDataChanged()), this, SLOT(processMetaInfo()));
QObject::connect(currentDownload, SIGNAL(downloadProgress(qint64, qint64)),
this, SLOT(downloadProgress(qint64, qint64)));
QObject::connect(currentDownload, SIGNAL(finished()), this, SLOT(downloadFinished()));
}
// ----------------------------------------------------------------------------------------
// Private slots
// ----------------------------------------------------------------------------------------
void downloadManager::processMetaInfo(){
/* fetch filesize from header & filename from url (for now) */
const QByteArray cltag = "Content-Length";
QByteArray clinfo = currentDownload->rawHeader(cltag);
QFileInfo fi(outfile);
emit downloadInfo(outfile.fileName(), clinfo.toDouble());
}
// ----------------------------------------------------------------------------------------
void downloadManager::downloadReady()
{
/* data ready, save it */
outfile.write(currentDownload->readAll());
}
// ----------------------------------------------------------------------------------------
void downloadManager::downloadProgress(qint64 bytesIn, qint64 bytesTotal)
{
// "fix" for the weird bytesTotal = -1 initial reading...
if (bytesIn > bytesTotal)
return;
/* calculate current speed */
double speed = bytesIn * 1000 / dltime.elapsed();
QString unit;
if (speed < 1024) {
unit = "bytes/sec";
}
else if (speed < 1024*1024) {
speed /= 1024;
unit = "KB/s";
}
else {
speed /= 1024*1024;
unit = "MB/s";
}
/* update progress only if difference higher than the updateInterval setting */
currentProgress = ((bytesIn * 100) / bytesTotal);
if (currentProgress - lastProgress >= updateInterval){
lastProgress = currentProgress;
emit updateProgress(currentProgress, speed, unit);
if (debug) qDebug() << "Download progress of " << currentDownload->url().toString()
<< ": " << bytesIn << "/" << bytesTotal << "(" << currentProgress << "\%)";
}
return;
}
// ----------------------------------------------------------------------------------------
void downloadManager::downloadFinished()
{
/* check for errors */
if (currentDownload->error()){
if (debug) qDebug() << "Download of" << currentDownload->url().toString()
<< "failed with status code: " << currentDownload->error();
currentDownload->deleteLater();
outfile.remove();
return;
}
// TODO Handle errors.
if (debug) qDebug() << "NetworkCode: " << currentDownload->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
/* end download */
outfile.close();
currentDownload->deleteLater();
downloaded++;
dip = false;
if (debug) qDebug() << "Download of " << currentDownload->url().toString()
<< "finished. (dlcount = "<< downloaded << ")";
if (dlQ.isEmpty()){
emit downloadQueueEmpty();
if (debug) qDebug() << "Download manager ready. (2)";
return;
}
startNextDownload();
}
/* ----------------------------------------------------------------------------------------
*
** dead code: Header filename fetching & renaming **
const QByteArray cd = "Content-Disposition";
QByteArray cdc = currentDownload->rawHeader(cd);
int x = cdc.indexOf("filename=\"") + 10;
cdc.remove(0, x).chop(1);
if (!cdc.isEmpty())
currentTargetFilename = cdc;
else
currentTargetFilename = QString("download.\%1").arg(downloaded);
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!";
}
*/
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