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httpwindow.h Example File
network/http/httpwindow.h

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 #ifndef HTTPWINDOW_H
 #define HTTPWINDOW_H

 #include <QDialog>

 class QDialogButtonBox;
 class QFile;
 class QHttp;
 class QHttpResponseHeader;
 class QLabel;
 class QLineEdit;
 class QProgressDialog;
 class QPushButton;
 class QSslError;
 class QAuthenticator;

 class HttpWindow : public QDialog
 {
     Q_OBJECT

 public:
     HttpWindow(QWidget *parent = 0);

 private slots:
     void downloadFile();
     void cancelDownload();
     void httpRequestFinished(int requestId, bool error);
     void readResponseHeader(const QHttpResponseHeader &responseHeader);
     void updateDataReadProgress(int bytesRead, int totalBytes);
     void enableDownloadButton();
     void slotAuthenticationRequired(const QString &, quint16, QAuthenticator *);
 #ifndef QT_NO_OPENSSL
     void sslErrors(const QList<QSslError> &errors);
 #endif

 private:
     QLabel *statusLabel;
     QLabel *urlLabel;
     QLineEdit *urlLineEdit;
     QProgressDialog *progressDialog;
     QPushButton *downloadButton;
     QPushButton *quitButton;
     QDialogButtonBox *buttonBox;

     QHttp *http;
     QFile *file;
     int httpGetId;
     bool httpRequestAborted;
 };

 #endif