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/***************************************************************************
sq_downloader.cpp - description
-------------------
begin : Fri Jun 07 2007
copyright : (C) 2007 by Baryshev Dmitry
email : ksquirrel.iv@gmail.com
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include <tqfile.h>
#include <kio/job.h>
#include <kfileitem.h>
#include <ktempfile.h>
#include "sq_libraryhandler.h"
#include "sq_downloader.h"
#ifndef KSQUIRREL_PART
#include "sq_archivehandler.h"
#endif
#define SQ_PREDOWNLOAD_SIZE 50
SQ_Downloader::SQ_Downloader(TQObject *parent, const char *name) : TQObject(parent, name), job(0), m_error(false)
{
tmp = new KTempFile;
tmp->setAutoDelete(true);
tmp->close();
}
SQ_Downloader::~SQ_Downloader()
{
clean();
delete tmp;
}
void SQ_Downloader::start(KFileItem *fi)
{
m_error = false;
mURL = fi->url();
emitPercents = false;
startTime = TQTime::currentTime();
size = 0;
totalSize = fi->size();
#ifndef KSQUIRREL_PART
nomime = SQ_ArchiveHandler::instance()->findProtocolByMime(fi->mimetype()).isEmpty();
#else
nomime = true;
#endif
job = KIO::get(mURL, false, false);
clean();
continueDownload = false;
connect(job, TQT_SIGNAL(data(KIO::Job *, const TQByteArray &)), this, TQT_SLOT(slotData(KIO::Job *, const TQByteArray &)));
connect(job, TQT_SIGNAL(result(KIO::Job *)), this, TQT_SLOT(slotDataResult(KIO::Job *)));
}
void SQ_Downloader::slotData(KIO::Job *job, const TQByteArray &ba)
{
size += ba.size();
TQFile f(tmp->name());
if(f.open(IO_WriteOnly | IO_Append))
{
f.writeBlock(ba);
f.close();
}
if(emitPercents || startTime.msecsTo(TQTime::currentTime()) > 1000)
{
emit percents(size);
emitPercents = true;
}
// 50 bytes are enough to determine file type
if(size >= SQ_PREDOWNLOAD_SIZE && !continueDownload && totalSize != size)
{
// cancel download (file type is not supported)
SQ_LIBRARY *lib = SQ_LibraryHandler::instance()->libraryForFile(tmp->name());
if(nomime && !lib)
{
job->kill(false); // kill job & emit result
}
else
{
// nice, we can open this image/archive - continue download
continueDownload = true;
}
}
}
void SQ_Downloader::slotDataResult(KIO::Job *cpjob)
{
job = 0;
// job error
if(cpjob->error() && cpjob->error() != KIO::ERR_USER_CANCELED)
{
m_error = true;
emit result(mEmptyURL);
}
else if(cpjob->error() == KIO::ERR_USER_CANCELED) // not supported image/archive type -
// emit empty url without errors
{
emit result(mEmptyURL);
}
else // supported image type/archive type (no errors or job killed)
{
emit result(KURL::fromPathOrURL(tmp->name()));
}
}
void SQ_Downloader::clean()
{
TQFile f(tmp->name());
if(f.open(IO_WriteOnly))
f.close();
}
void SQ_Downloader::kill()
{
if(job) job->kill();
}
#include "sq_downloader.moc"
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