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#include "downloadfilejob.h"
#include <QtNetwork/QNetworkReply>
#include <QtCore/QFile>
#include <QtCore/QTemporaryFile>
using namespace QMatrixClient;
class DownloadFileJob::Private
{
public:
Private() : tempFile(new QTemporaryFile()) { }
explicit Private(const QString& localFilename)
: targetFile(new QFile(localFilename))
, tempFile(new QFile(targetFile->fileName() + ".qmcdownload"))
{ }
QScopedPointer<QFile> targetFile;
QScopedPointer<QFile> tempFile;
};
DownloadFileJob::DownloadFileJob(const QString& serverName,
const QString& mediaId,
const QString& localFilename)
: GetContentJob(serverName, mediaId)
, d(localFilename.isEmpty() ? new Private : new Private(localFilename))
{
setObjectName("DownloadFileJob");
}
QString DownloadFileJob::targetFileName() const
{
return (d->targetFile ? d->targetFile : d->tempFile)->fileName();
}
void DownloadFileJob::beforeStart(const ConnectionData*)
{
if (d->targetFile && !d->targetFile->isReadable() &&
!d->targetFile->open(QIODevice::WriteOnly))
{
qCWarning(JOBS) << "Couldn't open the file"
<< d->targetFile->fileName() << "for writing";
setStatus(FileError, "Could not open the target file for writing");
return;
}
if (!d->tempFile->isReadable() && !d->tempFile->open(QIODevice::WriteOnly))
{
qCWarning(JOBS) << "Couldn't open the temporary file"
<< d->tempFile->fileName() << "for writing";
setStatus(FileError, "Could not open the temporary download file");
}
qCDebug(JOBS) << "Downloading to" << d->tempFile->fileName();
}
void DownloadFileJob::afterStart(const ConnectionData*, QNetworkReply* reply)
{
connect(reply, &QNetworkReply::metaDataChanged, this, [this,reply] {
auto sizeHeader = reply->header(QNetworkRequest::ContentLengthHeader);
if (sizeHeader.isValid())
{
auto targetSize = sizeHeader.value<qint64>();
if (targetSize != -1)
if (!d->tempFile->resize(targetSize))
{
qCWarning(JOBS) << "Failed to allocate" << targetSize
<< "bytes for" << d->tempFile->fileName();
setStatus(FileError,
"Could not reserve disk space for download");
}
}
});
connect(reply, &QIODevice::readyRead, this, [this,reply] {
auto bytes = reply->read(reply->bytesAvailable());
if (bytes.isEmpty())
{
qCWarning(JOBS)
<< "Unexpected empty chunk when downloading from"
<< reply->url() << "to" << d->tempFile->fileName();
} else {
d->tempFile->write(bytes);
}
});
}
void DownloadFileJob::beforeAbandon(QNetworkReply*)
{
if (d->targetFile)
d->targetFile->remove();
d->tempFile->remove();
}
BaseJob::Status DownloadFileJob::parseReply(QNetworkReply*)
{
if (d->targetFile)
{
d->targetFile->close();
if (!d->targetFile->remove())
{
qCWarning(JOBS) << "Failed to remove the target file placeholder";
return { FileError, "Couldn't finalise the download" };
}
if (!d->tempFile->rename(d->targetFile->fileName()))
{
qCWarning(JOBS) << "Failed to rename" << d->tempFile->fileName()
<< "to" << d->targetFile->fileName();
return { FileError, "Couldn't finalise the download" };
}
}
else
d->tempFile->close();
qCDebug(JOBS) << "Saved a file as" << targetFileName();
return Success;
}
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