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// SPDX-FileCopyrightText: 2018 Kitsune Ral <Kitsune-Ral@users.sf.net>
// SPDX-License-Identifier: LGPL-2.1-or-later
#include "downloadfilejob.h"
#include <QtCore/QFile>
#include <QtCore/QTemporaryFile>
#include <QtNetwork/QNetworkReply>
#ifdef Quotient_E2EE_ENABLED
# include <QtCore/QCryptographicHash>
# include "events/encryptedfile.h"
#endif
using namespace Quotient;
class DownloadFileJob::Private {
public:
Private() : tempFile(new QTemporaryFile()) {}
explicit Private(const QString& localFilename)
: targetFile(new QFile(localFilename))
, tempFile(new QFile(targetFile->fileName() + ".qtntdownload"))
{}
QScopedPointer<QFile> targetFile;
QScopedPointer<QFile> tempFile;
#ifdef Quotient_E2EE_ENABLED
Omittable<EncryptedFile> encryptedFile;
#endif
};
QUrl DownloadFileJob::makeRequestUrl(QUrl baseUrl, const QUrl& mxcUri)
{
return makeRequestUrl(std::move(baseUrl), mxcUri.authority(),
mxcUri.path().mid(1));
}
DownloadFileJob::DownloadFileJob(const QString& serverName,
const QString& mediaId,
const QString& localFilename)
: GetContentJob(serverName, mediaId)
, d(localFilename.isEmpty() ? makeImpl<Private>()
: makeImpl<Private>(localFilename))
{
setObjectName(QStringLiteral("DownloadFileJob"));
}
#ifdef Quotient_E2EE_ENABLED
DownloadFileJob::DownloadFileJob(const QString& serverName,
const QString& mediaId,
const EncryptedFile& file,
const QString& localFilename)
: GetContentJob(serverName, mediaId)
, d(localFilename.isEmpty() ? makeImpl<Private>()
: makeImpl<Private>(localFilename))
{
setObjectName(QStringLiteral("DownloadFileJob"));
d->encryptedFile = file;
}
#endif
QString DownloadFileJob::targetFileName() const
{
return (d->targetFile ? d->targetFile : d->tempFile)->fileName();
}
void DownloadFileJob::doPrepare()
{
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::ReadWrite)) {
qCWarning(JOBS) << "Couldn't open the temporary file"
<< d->tempFile->fileName() << "for writing";
setStatus(FileError, "Could not open the temporary download file");
return;
}
qCDebug(JOBS) << "Downloading to" << d->tempFile->fileName();
}
void DownloadFileJob::onSentRequest(QNetworkReply* reply)
{
connect(reply, &QNetworkReply::metaDataChanged, this, [this, reply] {
if (!status().good())
return;
auto sizeHeader = reply->header(QNetworkRequest::ContentLengthHeader);
if (sizeHeader.isValid()) {
auto targetSize = sizeHeader.toLongLong();
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] {
if (!status().good())
return;
auto bytes = reply->read(reply->bytesAvailable());
if (!bytes.isEmpty())
d->tempFile->write(bytes);
else
qCWarning(JOBS) << "Unexpected empty chunk when downloading from"
<< reply->url() << "to" << d->tempFile->fileName();
});
}
void DownloadFileJob::beforeAbandon()
{
if (d->targetFile)
d->targetFile->remove();
d->tempFile->remove();
}
BaseJob::Status DownloadFileJob::prepareResult()
{
if (d->targetFile) {
#ifdef Quotient_E2EE_ENABLED
if (d->encryptedFile.has_value()) {
d->tempFile->seek(0);
QByteArray encrypted = d->tempFile->readAll();
EncryptedFile file = *d->encryptedFile;
auto decrypted = file.decryptFile(encrypted);
d->targetFile->write(decrypted);
d->tempFile->remove();
} else {
#endif
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" };
}
#ifdef Quotient_E2EE_ENABLED
}
#endif
} else {
#ifdef Quotient_E2EE_ENABLED
if (d->encryptedFile.has_value()) {
d->tempFile->seek(0);
auto encrypted = d->tempFile->readAll();
EncryptedFile file = *d->encryptedFile;
auto decrypted = file.decryptFile(encrypted);
d->tempFile->write(decrypted);
} else {
#endif
d->tempFile->close();
#ifdef Quotient_E2EE_ENABLED
}
#endif
}
qCDebug(JOBS) << "Saved a file as" << targetFileName();
return Success;
}
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