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96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
/*
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* WebResourceProvider.h - header file for WebResourceProvider
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*
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* Copyright (c) 2009-2010 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _WEB_RESOURCE_PROVIDER_H
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#define _WEB_RESOURCE_PROVIDER_H
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#include <QtXml/QDomNode>
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#include "ResourceProvider.h"
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#include "ResourceItem.h"
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#include "ProgressTrackingNetworkAccessManager.h"
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class QBuffer;
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class QNetworkReply;
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/*! \brief The WebResourceProvider class provides a ResourceProvider
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* implementation which serves data from the internet (currently
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* specific to LSP only).
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*
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* Most of this class is network management code (quite highlevel thanks to
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* QtNetwork though). Besides that it translates web resource index files into
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* a ResourceDB and fetches files by given hash.
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*/
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class WebResourceProvider : public ResourceProvider
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{
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Q_OBJECT
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public:
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WebResourceProvider( const QString & _url );
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virtual ~WebResourceProvider();
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virtual QString providerName() const
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{
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return "WebResourceProvider";
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}
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virtual void updateDatabase();
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virtual int dataSize( const ResourceItem * _item ) const
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{
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// asume that the size we have set before from the web
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// catalogue is correct
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return _item->size();
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}
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virtual QByteArray fetchData( const ResourceItem * _item,
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int _maxSize = -1 ) const;
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virtual bool isLocal() const
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{
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return false;
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}
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private slots:
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void finishDownload( QNetworkReply * _reply );
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private:
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ResourceItem::Relation * addRelation( ResourceItem::Relation * _parent,
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ResourceItem * _item );
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void importNodeIntoDB( const QDomNode & n,
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ResourceItem::Relation * _parent );
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void download( const QUrl & _url, QBuffer * _target ) const;
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void downloadAsync( const QUrl & _url, QBuffer * _target ) const;
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typedef QMap<QNetworkReply *, QBuffer *> DownloadMap;
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static DownloadMap m_downloads;
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} ;
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#endif
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