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/****************************************************************************
** Copyright (C) 2001-2010 Klaralvdalens Datakonsult AB. All rights reserved.
**
** This file is part of the KD Tools library.
**
** Licensees holding valid commercial KD Tools licenses may use this file in
** accordance with the KD Tools Commercial License Agreement provided with
** the Software.
**
**
** This file may be distributed and/or modified under the terms of the
** GNU Lesser General Public License version 2 and version 3 as published by the
** Free Software Foundation and appearing in the file LICENSE.LGPL included.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** Contact info@kdab.com if any conditions of this licensing are not
** clear to you.
**
**********************************************************************/
#include "kdupdaterufuncompressor_p.h"
#include "kdupdaterufcompresscommon_p.h"
#include <QCryptographicHash>
#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QFSFileEngine>
#include <QDebug>
using namespace KDUpdater;
class UFUncompressor::Private
{
public:
QString ufFileName;
QString destination;
QString errorMessage;
void setError(const QString& msg);
};
void UFUncompressor::Private::setError(const QString& msg)
{
errorMessage = msg;
}
UFUncompressor::UFUncompressor()
{
}
UFUncompressor::~UFUncompressor()
{
}
QString UFUncompressor::errorString() const
{
return d->errorMessage;
}
void UFUncompressor::setFileName(const QString& fileName)
{
d->ufFileName = fileName;
}
QString UFUncompressor::fileName() const
{
return d->ufFileName;
}
void UFUncompressor::setDestination(const QString& dest)
{
d->destination = dest;
}
QString UFUncompressor::destination() const
{
return d->destination;
}
bool UFUncompressor::uncompress()
{
d->errorMessage.clear();
// First open the uf file for reading
QFile ufFile( d->ufFileName );
if( !ufFile.open(QFile::ReadOnly) ) {
d->setError(tr("Couldn't open file for reading: %1").arg( ufFile.errorString() ));
return false;
}
QDataStream ufDS( &ufFile );
ufDS.setVersion( QDataStream::Qt_4_2 );
QCryptographicHash hash( QCryptographicHash::Md5 );
// Now read the header.
UFHeader header;
ufDS >> header;
if( ufDS.status() != QDataStream::Ok || !header.isValid() )
{
d->setError( tr( "Couldn't read the file header." ) );
return false;
}
header.addToHash(hash);
// Some basic checks.
if( header.magic != QLatin1String( KD_UPDATER_UF_HEADER_MAGIC ) ) {
d->setError(tr("Wrong file format (magic number not found)"));
return false;
}
// Lets get to the destination directory
const QDir dir(d->destination);
QFSFileEngine fileEngine;
// Lets create the required directory structure
int numExpectedFiles = 0;
for(int i=0; i<header.fileList.count(); i++)
{
const QString fileName = header.fileList[i];
// qDebug("ToUncompress %s", qPrintable(fileName));
if( header.isDirList[i] )
{
if ( !dir.mkpath( fileName ) )
{
d->setError(tr("Could not create folder: %1/%2").arg( d->destination, fileName ));
return false;
}
fileEngine.setFileName( QString(QLatin1String( "%1/%2" )).arg(d->destination, fileName) );
fileEngine.setPermissions( header.permList[i] | QAbstractFileEngine::ExeOwnerPerm );
} else {
++numExpectedFiles;
}
}
// Lets now create files within these directories
int numActualFiles = 0;
while( !ufDS.atEnd() && numActualFiles < numExpectedFiles )
{
UFEntry ufEntry;
ufDS >> ufEntry;
if( ufDS.status() != QDataStream::Ok || !ufEntry.isValid() )
{
d->setError( tr( "Could not read information for entry %1." ).arg( numActualFiles ) );
return false;
}
ufEntry.addToHash(hash);
const QString completeFileName = QString(QLatin1String( "%1/%2" )).arg(d->destination, ufEntry.fileName);
const QByteArray ba = qUncompress( ufEntry.fileData );
// check the size
QDataStream stream( ufEntry.fileData );
stream.setVersion( QDataStream::Qt_4_2 );
qint32 length = 0;
stream >> length;
if( ba.length() != length ) // uncompress failed
{
d->setError(tr("Could not uncompress entry %1, corrupt data").arg( ufEntry.fileName ) );
return false;
}
QFile ufeFile( completeFileName );
if ( !ufeFile.open( QFile::WriteOnly ) )
{
d->setError(tr("Could not open file %1 for writing: %2").arg( completeFileName, ufeFile.errorString() ));
return false;
}
const char* const data = ba.constData();
const qint64 total = ba.size();
qint64 written = 0;
while ( written < total )
{
const qint64 num = ufeFile.write( data+written, total-written );
if ( num == -1 )
{
d->setError( tr("Failed writing uncompressed data to %1: %2").arg( completeFileName, ufeFile.errorString() ) );
return false;
}
written += num;
}
ufeFile.close();
const QFile::Permissions perm = static_cast< QFile::Permissions >( ufEntry.permissions );
ufeFile.setPermissions( perm );
if ( ufeFile.error() != QFile::NoError )
{
ufeFile.remove();
d->setError( tr("Failed writing uncompressed data to %1: %2").arg( completeFileName, ufeFile.errorString() ) );
return false;
}
qDebug("Uncompressed %s", qPrintable(completeFileName));
++numActualFiles;
}
if( numExpectedFiles != numActualFiles ) {
d->errorMessage = tr("Corrupt file (wrong number of files)");
return false;
}
QByteArray hashdata;
ufDS >> hashdata;
if( hashdata != hash.result() ) {
d->errorMessage = tr("Corrupt file (wrong hash)");
return false;
}
return true;
}
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