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qBittorrent/src/base/bittorrent/bencoderesumedatastorage.h
Vladimir Golovnev ed4570cb4d
Store minimal metadata for "restore torrent" purposes (#15191)
We can no longer save valid torrent files in the general case, because
for torrents of version 2, we need a full merkle tree to do it, but if
a torrent is added from magnet link, full merkle tree may not be available
even before the end of downloading all the data. Actually, we don't need
the full torrent file for the purposes of resuming the torrent, so we can
allow libtorrent to produce only a minimal part of the metadata as part
complete resume data, but we still want to store it in a separate file,
so we extract the resulting metadata from the complete resume data before
saving and merge it together before loading.
2021-07-19 07:59:06 +03:00

68 lines
2.6 KiB
C++

/*
* Bittorrent Client using Qt and libtorrent.
* Copyright (C) 2015, 2018 Vladimir Golovnev <glassez@yandex.ru>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* In addition, as a special exception, the copyright holders give permission to
* link this program with the OpenSSL project's "OpenSSL" library (or with
* modified versions of it that use the same license as the "OpenSSL" library),
* and distribute the linked executables. You must obey the GNU General Public
* License in all respects for all of the code used other than "OpenSSL". If you
* modify file(s), you may extend this exception to your version of the file(s),
* but you are not obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
#pragma once
#include <QDir>
#include <QVector>
#include "resumedatastorage.h"
class QByteArray;
class QThread;
namespace BitTorrent
{
class BencodeResumeDataStorage final : public ResumeDataStorage
{
Q_OBJECT
Q_DISABLE_COPY_MOVE(BencodeResumeDataStorage)
public:
explicit BencodeResumeDataStorage(const QString &path, QObject *parent = nullptr);
~BencodeResumeDataStorage() override;
QVector<TorrentID> registeredTorrents() const override;
std::optional<LoadTorrentParams> load(const TorrentID &id) const override;
void store(const TorrentID &id, const LoadTorrentParams &resumeData) const override;
void remove(const TorrentID &id) const override;
void storeQueue(const QVector<TorrentID> &queue) const override;
private:
void loadQueue(const QString &queueFilename);
std::optional<LoadTorrentParams> loadTorrentResumeData(const QByteArray &data, const QByteArray &metadata) const;
const QDir m_resumeDataDir;
QVector<TorrentID> m_registeredTorrents;
QThread *m_ioThread = nullptr;
class Worker;
Worker *m_asyncWorker = nullptr;
};
}