downloadmanager.h Example File

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  #ifndef DOWNLOADMANAGER_H
  #define DOWNLOADMANAGER_H

  #include <QtNetwork>
  #include <QtCore>

  #include "textprogressbar.h"

  class DownloadManager: public QObject
  {
      Q_OBJECT
  public:
      explicit DownloadManager(QObject *parent = nullptr);

      void append(const QUrl &url);
      void append(const QStringList &urls);
      static QString saveFileName(const QUrl &url);

  signals:
      void finished();

  private slots:
      void startNextDownload();
      void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);
      void downloadFinished();
      void downloadReadyRead();

  private:
      bool isHttpRedirect() const;
      void reportRedirect();

      QNetworkAccessManager manager;
      QQueue<QUrl> downloadQueue;
      QNetworkReply *currentDownload = nullptr;
      QFile output;
      QTime downloadTime;
      TextProgressBar progressBar;

      int downloadedCount = 0;
      int totalCount = 0;
  };

  #endif