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79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
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#ifndef REMOTE_FILE_HPP__
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#define REMOTE_FILE_HPP__
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#include <QObject>
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#include <QString>
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#include <QUrl>
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#include <QFileInfo>
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#include <QSaveFile>
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class QNetworkAccessManager;
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class QNetworkReply;
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//
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// Synchronize an individual file specified by a URL to the local file
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// system
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//
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class RemoteFile final
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: public QObject
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{
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Q_OBJECT
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public:
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//
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// Clients of RemoteFile must provide an instance of this
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// interface. It may be used to receive information and requests
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// from the RemoteFile instance as it does its work.
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//
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class ListenerInterface
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{
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protected:
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ListenerInterface () {}
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public:
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virtual void error (QString const& title, QString const& message) = 0;
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virtual bool redirect_request (QUrl const&) {return false;} // disallow
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virtual void download_progress (qint64 /* bytes_received */, qint64 /* total_bytes */) {}
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virtual void download_finished (bool /* success */) {}
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};
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explicit RemoteFile (ListenerInterface * listener, QNetworkAccessManager * network_manager
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, QString const& local_file_path, QObject * parent = nullptr);
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// true if local file exists or will do very soon
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bool local () const;
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// download/remove the local file
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bool sync (QUrl const& url, bool local = true, bool force = false);
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// abort an active download
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void abort ();
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// change the local location, this will rename if the file exists locally
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void local_file_path (QString const&);
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QString local_file_path () const {return local_file_.absoluteFilePath ();}
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QUrl url () const {return url_;}
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private:
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void download (QUrl const& url);
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void reply_finished ();
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Q_SLOT void store ();
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Q_SIGNAL void redirect (QUrl const&, unsigned redirect_count);
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Q_SIGNAL void downloadProgress (qint64 bytes_received, qint64 total_bytes);
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Q_SIGNAL void finished ();
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ListenerInterface * listener_;
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QNetworkAccessManager * network_manager_;
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QFileInfo local_file_;
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QUrl url_;
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QNetworkReply * reply_;
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bool is_valid_;
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unsigned redirect_count_;
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QSaveFile file_;
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};
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#endif
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