1 /*
2 * Bittorrent Client using Qt and libtorrent.
3 * Copyright (C) 2017 Vladimir Golovnev <glassez@yandex.ru>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 *
19 * In addition, as a special exception, the copyright holders give permission to
20 * link this program with the OpenSSL project's "OpenSSL" library (or with
21 * modified versions of it that use the same license as the "OpenSSL" library),
22 * and distribute the linked executables. You must obey the GNU General Public
23 * License in all respects for all of the code used other than "OpenSSL". If you
24 * modify file(s), you may extend this exception to your version of the file(s),
25 * but you are not obligated to do so. If you do not wish to do so, delete this
26 * exception statement from your version.
27 */
28
29 #include "asyncfilestorage.h"
30
31 #include <QDebug>
32 #include <QMetaObject>
33 #include <QSaveFile>
34
AsyncFileStorage(const QString & storageFolderPath,QObject * parent)35 AsyncFileStorage::AsyncFileStorage(const QString &storageFolderPath, QObject *parent)
36 : QObject(parent)
37 , m_storageDir(storageFolderPath)
38 , m_lockFile(m_storageDir.absoluteFilePath(QStringLiteral("storage.lock")))
39 {
40 if (!m_storageDir.mkpath(m_storageDir.absolutePath()))
41 throw AsyncFileStorageError
42 {tr("Could not create directory '%1'.")
43 .arg(m_storageDir.absolutePath())};
44
45 // TODO: This folder locking approach does not work for UNIX systems. Implement it.
46 if (!m_lockFile.open(QFile::WriteOnly))
47 throw AsyncFileStorageError {m_lockFile.errorString()};
48 }
49
~AsyncFileStorage()50 AsyncFileStorage::~AsyncFileStorage()
51 {
52 m_lockFile.close();
53 m_lockFile.remove();
54 }
55
store(const QString & fileName,const QByteArray & data)56 void AsyncFileStorage::store(const QString &fileName, const QByteArray &data)
57 {
58 QMetaObject::invokeMethod(this, [this, data, fileName]() { store_impl(fileName, data); }
59 , Qt::QueuedConnection);
60 }
61
storageDir() const62 QDir AsyncFileStorage::storageDir() const
63 {
64 return m_storageDir;
65 }
66
store_impl(const QString & fileName,const QByteArray & data)67 void AsyncFileStorage::store_impl(const QString &fileName, const QByteArray &data)
68 {
69 const QString filePath = m_storageDir.absoluteFilePath(fileName);
70 QSaveFile file(filePath);
71 qDebug() << "AsyncFileStorage: Saving data to" << filePath;
72 if (file.open(QIODevice::WriteOnly))
73 {
74 file.write(data);
75 if (!file.commit())
76 {
77 qDebug() << "AsyncFileStorage: Failed to save data";
78 emit failed(filePath, file.errorString());
79 }
80 }
81 }
82