qt5base-lts/examples/network/torrent/metainfo.cpp

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "bencodeparser.h"
#include "metainfo.h"
#include <QDateTime>
#include <QMetaType>
#include <QString>
MetaInfo::MetaInfo()
{
clear();
}
void MetaInfo::clear()
{
errString = "Unknown error";
content.clear();
infoData.clear();
metaInfoMultiFiles.clear();
metaInfoAnnounce.clear();
metaInfoAnnounceList.clear();
metaInfoCreationDate = QDateTime();
metaInfoComment.clear();
metaInfoCreatedBy.clear();
metaInfoName.clear();
metaInfoPieceLength = 0;
metaInfoSha1Sums.clear();
}
bool MetaInfo::parse(const QByteArray &data)
{
clear();
content = data;
BencodeParser parser;
if (!parser.parse(content)) {
errString = parser.errorString();
return false;
}
infoData = parser.infoSection();
QMap<QByteArray, QVariant> dict = parser.dictionary();
if (!dict.contains("info"))
return false;
QMap<QByteArray, QVariant> info = qvariant_cast<Dictionary>(dict.value("info"));
if (info.contains("files")) {
metaInfoFileForm = MultiFileForm;
QList<QVariant> files = info.value("files").toList();
for (int i = 0; i < files.size(); ++i) {
QMap<QByteArray, QVariant> file = qvariant_cast<Dictionary>(files.at(i));
QList<QVariant> pathElements = file.value("path").toList();
QByteArray path;
foreach (QVariant p, pathElements) {
if (!path.isEmpty())
path += "/";
path += p.toByteArray();
}
MetaInfoMultiFile multiFile;
multiFile.length = file.value("length").toLongLong();
multiFile.path = QString::fromUtf8(path);
multiFile.md5sum = file.value("md5sum").toByteArray();
metaInfoMultiFiles << multiFile;
}
metaInfoName = QString::fromUtf8(info.value("name").toByteArray());
metaInfoPieceLength = info.value("piece length").toInt();
QByteArray pieces = info.value("pieces").toByteArray();
for (int i = 0; i < pieces.size(); i += 20)
metaInfoSha1Sums << pieces.mid(i, 20);
} else if (info.contains("length")) {
metaInfoFileForm = SingleFileForm;
metaInfoSingleFile.length = info.value("length").toLongLong();
metaInfoSingleFile.md5sum = info.value("md5sum").toByteArray();
metaInfoSingleFile.name = QString::fromUtf8(info.value("name").toByteArray());
metaInfoSingleFile.pieceLength = info.value("piece length").toInt();
QByteArray pieces = info.value("pieces").toByteArray();
for (int i = 0; i < pieces.size(); i += 20)
metaInfoSingleFile.sha1Sums << pieces.mid(i, 20);
}
metaInfoAnnounce = QString::fromUtf8(dict.value("announce").toByteArray());
if (dict.contains("announce-list")) {
// ### unimplemented
}
if (dict.contains("creation date"))
metaInfoCreationDate.setTime_t(dict.value("creation date").toInt());
if (dict.contains("comment"))
metaInfoComment = QString::fromUtf8(dict.value("comment").toByteArray());
if (dict.contains("created by"))
metaInfoCreatedBy = QString::fromUtf8(dict.value("created by").toByteArray());
return true;
}
QByteArray MetaInfo::infoValue() const
{
return infoData;
}
QString MetaInfo::errorString() const
{
return errString;
}
MetaInfo::FileForm MetaInfo::fileForm() const
{
return metaInfoFileForm;
}
QString MetaInfo::announceUrl() const
{
return metaInfoAnnounce;
}
QStringList MetaInfo::announceList() const
{
return metaInfoAnnounceList;
}
QDateTime MetaInfo::creationDate() const
{
return metaInfoCreationDate;
}
QString MetaInfo::comment() const
{
return metaInfoComment;
}
QString MetaInfo::createdBy() const
{
return metaInfoCreatedBy;
}
MetaInfoSingleFile MetaInfo::singleFile() const
{
return metaInfoSingleFile;
}
QList<MetaInfoMultiFile> MetaInfo::multiFiles() const
{
return metaInfoMultiFiles;
}
QString MetaInfo::name() const
{
return metaInfoName;
}
int MetaInfo::pieceLength() const
{
return metaInfoPieceLength;
}
QList<QByteArray> MetaInfo::sha1Sums() const
{
return metaInfoSha1Sums;
}
qint64 MetaInfo::totalSize() const
{
if (fileForm() == SingleFileForm)
return singleFile().length;
qint64 size = 0;
foreach (MetaInfoMultiFile file, multiFiles())
size += file.length;
return size;
}