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Add support for exporting .torrent data to buffer

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Related: https://github.com/qbittorrent/qBittorrent/pull/16886#discussion_r855882018
PR #16931.
This commit is contained in:
Chocobo1 2022-04-27 12:29:00 +08:00 committed by GitHub
parent 7432c4dbfe
commit 9351f66c26
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3 changed files with 37 additions and 7 deletions
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2
src/base/bittorrent/torrent.h
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@ -40,6 +40,7 @@
#include "abstractfilestorage.h"
class QBitArray;
class QByteArray;
class QDateTime;
class QUrl;
@ -301,6 +302,7 @@ namespace BitTorrent
virtual void clearPeers() = 0;
virtual QString createMagnetURI() const = 0;
virtual nonstd::expected<QByteArray, QString> exportToBuffer() const = 0;
virtual nonstd::expected<void, QString> exportToFile(const Path &path) const = 0;
TorrentID id() const;

37
src/base/bittorrent/torrentimpl.cpp
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@ -45,6 +45,7 @@
#include <libtorrent/info_hash.hpp>
#endif
#include <QByteArray>
#include <QDebug>
#include <QFile>
#include <QStringList>
@ -2250,7 +2251,7 @@ QString TorrentImpl::createMagnetURI() const
return QString::fromStdString(lt::make_magnet_uri(m_nativeHandle));
}
nonstd::expected<void, QString> TorrentImpl::exportToFile(const Path &path) const
nonstd::expected<lt::entry, QString> TorrentImpl::exportTorrent() const
{
if (!hasMetadata())
return nonstd::make_unexpected(tr("Missing metadata"));
@ -2263,21 +2264,45 @@ nonstd::expected<void, QString> TorrentImpl::exportToFile(const Path &path) cons
#else
const std::shared_ptr<lt::torrent_info> torrentInfo = info().nativeInfo();
#endif
auto creator = lt::create_torrent(*torrentInfo);
lt::create_torrent creator {*torrentInfo};
for (const TrackerEntry &entry : asConst(trackers()))
creator.add_tracker(entry.url.toStdString(), entry.tier);
const lt::entry torrentEntry = creator.generate();
const nonstd::expected<void, QString> result = Utils::IO::saveToFile(path, torrentEntry);
if (!result)
return result.get_unexpected();
return creator.generate();
}
catch (const lt::system_error &err)
{
return nonstd::make_unexpected(QString::fromLocal8Bit(err.what()));
}
return nonstd::make_unexpected(tr("Unexpected error"));
}
nonstd::expected<QByteArray, QString> TorrentImpl::exportToBuffer() const
{
const nonstd::expected<lt::entry, QString> preparationResult = exportTorrent();
if (!preparationResult)
return preparationResult.get_unexpected();
// usually torrent size should be smaller than 1 MB,
// however there are >100 MB v2/hybrid torrent files out in the wild
QByteArray buffer;
buffer.reserve(1024 * 1024);
lt::bencode(std::back_inserter(buffer), preparationResult.value());
return buffer;
}
nonstd::expected<void, QString> TorrentImpl::exportToFile(const Path &path) const
{
const nonstd::expected<lt::entry, QString> preparationResult = exportTorrent();
if (!preparationResult)
return preparationResult.get_unexpected();
const nonstd::expected<void, QString> saveResult = Utils::IO::saveToFile(path, preparationResult.value());
if (!saveResult)
return saveResult.get_unexpected();
return {};
}

5
src/base/bittorrent/torrentimpl.h
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@ -229,7 +229,8 @@ namespace BitTorrent
void clearPeers() override;
QString createMagnetURI() const override;
nonstd::expected<void, QString> exportToFile(const Path &path) const;
nonstd::expected<QByteArray, QString> exportToBuffer() const override;
nonstd::expected<void, QString> exportToFile(const Path &path) const override;
bool needSaveResumeData() const;
@ -283,6 +284,8 @@ namespace BitTorrent
void endReceivedMetadataHandling(const Path &savePath, const PathList &fileNames);
void reload();
nonstd::expected<lt::entry, QString> exportTorrent() const;
Session *const m_session;
lt::session *m_nativeSession;
lt::torrent_handle m_nativeHandle;