simpleDownloader.h

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#ifndef BALL_SYSTEM_SIMPLEDOWNLOADER_H
#define BALL_SYSTEM_SIMPLEDOWNLOADER_H

#ifndef BALL_DATATYPE_STRING_H
  #include <BALL/DATATYPE/string.h>
#endif

#include <QtCore/QThread>
#include <QtCore/QFile>
#include <QtNetwork/QFtp>

#include <QtNetwork/QNetworkReply>

class QByteArray;

namespace BALL
{
  namespace SimpleDownloaderHelper
  {
    class HelperThread;
  }

  class BALL_EXPORT SimpleDownloader
    : public QObject
  {
    Q_OBJECT

    public:
      /*
       * Default Constructor.
       *
       * @param url The URL to download.
       * @param timeout The maximum number of milliseconds the download is allowed to take.
       *                default: infinite
       */
      SimpleDownloader(const String& url, unsigned int timeout = UINT_MAX);

      /*
       * Default Constructor.
       *
       * @param url The URL to download.
       * @param timeout The maximum number of milliseconds the download is allowed to take.
       *                default: infinite
       */
      SimpleDownloader(const QUrl& url, unsigned int timeout = UINT_MAX);

      int downloadToBuffer(std::vector<char>& buffer);

      int downloadToFile(const String& path);

      int uploadStringToBuffer(const String& data, std::vector<char>& response);

      int uploadStringToFile(const String& data, const String& response);

      int uploadFileToBuffer(const String& path, std::vector<char>& response);

      int uploadFileToFile(const String& path, const String& response);

      void setTimeout(unsigned int timeout);

      void setURL(const String& url);

      void setURL(const QUrl& url);

      const QUrl& getURL() const;

    private:
      int download_(SimpleDownloaderHelper::HelperThread& thread);
      int qftpDownloadHack_(QIODevice* iodev);

      QUrl url_;
      unsigned int timeout_;
  };

  namespace SimpleDownloaderHelper
  {
    class HelperThread : public QThread
    {
      public:
        HelperThread(const QUrl& url, QByteArray* result, SimpleDownloader* parent);
        HelperThread(const QUrl& url, const String& path, SimpleDownloader* parent);

        int getStatus();

      protected:
        virtual QNetworkReply* getReply_(QNetworkAccessManager* man) = 0;

        void run();

        int err_;
        QUrl url_;
        QByteArray* result_;
        String path_;
        SimpleDownloader* parent_;
    };

    class DLThread : public HelperThread
    {
      public:
        DLThread(const QUrl& url, QByteArray* result, SimpleDownloader* parent);
        DLThread(const QUrl& url, const String& path, SimpleDownloader* parent);

      protected:
        virtual QNetworkReply* getReply_(QNetworkAccessManager* man);
    };

    class UPThread : public HelperThread
    {
      public:
        UPThread(const QUrl& url, const QByteArray* data, QByteArray* result, SimpleDownloader* parent);
        UPThread(const QUrl& url, const QByteArray* data, const String& path, SimpleDownloader* parent);
        UPThread(const QUrl& url, QIODevice* file, QByteArray* result, SimpleDownloader* parent);
        UPThread(const QUrl& url, QIODevice* file, const String& path, SimpleDownloader* parent);

      protected:
        virtual QNetworkReply* getReply_(QNetworkAccessManager* man);

        const QByteArray* data_;
        QIODevice* file_;
    };

    class BasicHelper : public QObject
    {
      Q_OBJECT

      public:
        BasicHelper(HelperThread* caller, QNetworkReply* reply);
        virtual ~BasicHelper(){}

      public slots:
        void error(QNetworkReply::NetworkError error);
#ifndef QT_NO_OPENSSL
        void sslErrors(const QList<QSslError>& errors);
#endif
        virtual void finished() = 0;

      protected:
        HelperThread* caller_;
        QNetworkReply* reply_;
    };

    class DLArrayHelper : public BasicHelper
    {
      Q_OBJECT

      public:
        DLArrayHelper(HelperThread* caller, QNetworkReply* reply, QByteArray* result);

      public slots:
        void finished();

      private:
        QByteArray* result_;
    };

    class DLHelper : public BasicHelper
    {
      Q_OBJECT

      public:
        DLHelper(HelperThread* caller, QNetworkReply* reply, const String& path);

      public slots:
        void finished();
        void receivedData();

      private:
        QFile file_;
    };


    // We need this due to a bug in QNetworkAccessManager that basically
    // screws up the FTP download code. This should be fixed upstream with
    // the advent of Qt5

    class QFtpHackHelper;

    class QFtpHackThread : public QThread
    {
      Q_OBJECT

      public:
        QFtpHackThread(const QUrl& url, QIODevice* iodev, SimpleDownloader* parent);
        ~QFtpHackThread();

      protected:
        void run();

      private:
        QFtp* ftp_;
        QFtpHackHelper* helper_;
        QUrl url_;
        QIODevice* iodev_;
        SimpleDownloader* parent_;
    };

    class QFtpHackHelper : public QObject
    {
      Q_OBJECT

      public:
        QFtpHackHelper(QFtpHackThread* th);

      public slots:
        void done(bool error);

      private:
        QFtpHackThread* th_;
    };

  }
}

#endif //BALL_SYSTEM_SIMPLEDOWNLOADER_H

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