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CurlDownload.h

/*
FatRat download manager
http://fatrat.dolezel.info

Copyright (C) 2006-2008 Lubos Dolezel <lubos a dolezel.info>

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

In addition, as a special exemption, Luboš Doležel gives permission
to link the code of FatRat with the OpenSSL project's
"OpenSSL" library (or with modified versions of it that use the; same
license as the "OpenSSL" library), and distribute the linked
executables. You must obey the GNU General Public License in all
respects for all of the code used other than "OpenSSL".
*/

#ifndef CURLDOWNLOAD_H
#define CURLDOWNLOAD_H
#include <Transfer.h>
#include <fatrat.h>
#include "engines/CurlUser.h"
#include <QHash>
#include <QUuid>
#include <QDir>
#include <QUrl>

class CurlDownload : public Transfer, public CurlUser
{
Q_OBJECT
public:
      CurlDownload();
      ~CurlDownload();
      
      virtual void init(QString source, QString target);
      virtual void changeActive(bool bActove);
      virtual void setObject(QString object);
      virtual QString object() const;
      virtual QString myClass() const { return "GeneralDownload"; }
      virtual QString message() const { return m_strMessage; }
      virtual QString name() const;
      virtual void speeds(int& down, int& up) const;
      virtual qulonglong total() const;
      virtual qulonglong done() const;
      virtual void load(const QDomNode& map);
      virtual void save(QDomDocument& doc, QDomNode& map) const;
      virtual void setSpeedLimits(int down, int up);
      
      static int acceptable(QString uri, bool);
      static QDialog* createMultipleOptionsWidget(QWidget* parent, QList<Transfer*>& transfers);
      static Transfer* createInstance() { return new CurlDownload; }
      static void globalInit();
      static void globalExit();
      
      virtual WidgetHostChild* createOptionsWidget(QWidget* w);
      virtual void fillContextMenu(QMenu& menu);
protected:
      virtual CURL* curlHandle();
      virtual bool writeData(const char* buffer, size_t bytes);
      virtual void transferDone(CURLcode result);
      QString filePath() const;
private slots:
      void switchMirror();
      void computeHash();
private:
      void generateName();
      void init2(QString uri, QString dest);
      void setTargetName(QString newFileName);
      void processHeaders();
      
      static int seek_function(int file, curl_off_t offset, int origin);
      static size_t process_header(const char* ptr, size_t size, size_t nmemb, CurlDownload* This);
      static int curl_debug_callback(CURL*, curl_infotype, char* text, size_t bytes, CurlDownload* This);
protected:
      CURL* m_curl;
      QDir m_dir;
      qulonglong m_nTotal;
      mutable qulonglong m_nStart;
      
      QString m_strFile, m_strMessage;
      int m_file;
      bool m_bAutoName;
      QHash<QByteArray, QByteArray> m_headers;
      
      char m_errorBuffer[CURL_ERROR_SIZE];
      
      struct UrlObject
      {
            QUrl url;
            QString strReferrer, strBindAddress;
            FtpMode ftpMode;
            QUuid proxy;
      };
      QList<UrlObject> m_urls;
      int m_nUrl;
      
      friend class HttpOptsWidget;
      friend class HttpUrlOptsDlg;
};

#endif

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