Gentlemen,
I posted a huge problem some time ago and I assume it was too long.
I made some examinations and I am pretty sure that it has the same roots as the situation I describe below.

PROBLEM
Let us have a program that uses QFtp to download some file.
This applies to the program below:
Qt Code: 
  1. #ifndef FTPGET_H
  2. #define FTPGET_H
  3.  
  4. #include <QFile>
  5. #include <QFtp>
  6.  
  7. class QUrl;
  8.  
  9. class FtpGet : public QObject
  10. {
  11.     Q_OBJECT
  12.  
  13. public:
  14.     FtpGet(QObject *parent = 0);
  15.  
  16.     bool getFile(const QUrl &url);
  17.  
  18. signals:
  19.     void done();
  20.  
  21. private slots:
  22.     void ftpDone(bool error);
  23.  
  24. private:
  25.     QFtp ftp;
  26.     QFile file;
  27. };
  28.  
  29. #endif
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Qt Code: 
  1. #include <QtCore>
  2. #include <QtNetwork>
  3. #include <iostream>
  4.  
  5. #include "ftpget.h"
  6.  
  7. using namespace std;
  8.  
  9. FtpGet::FtpGet(QObject *parent)
  10.     : QObject(parent)
  11. {
  12.     connect(&ftp, SIGNAL(done(bool)), this, SLOT(ftpDone(bool)));
  13. }
  14.  
  15. bool FtpGet::getFile(const QUrl &url)
  16. {
  17.     if (!url.isValid()) {
  18.         cerr << "Error: Invalid URL" << endl;
  19.         return false;
  20.     }
  21.  
  22.     if (url.scheme() != "ftp") {
  23.         cerr << "Error: URL must start with 'ftp:'" << endl;
  24.         return false;
  25.     }
  26.  
  27.     if (url.path().isEmpty()) {
  28.         cerr << "Error: URL has no path" << endl;
  29.         return false;
  30.     }
  31.  
  32.     QString localFileName = QFileInfo(url.path()).fileName();
  33.     if (localFileName.isEmpty())
  34.         localFileName = "ftpget.out";
  35.  
  36.     file.setFileName(localFileName);
  37.     if (!file.open(QIODevice::WriteOnly)) {
  38.         cerr << "Error: Cannot open " << qPrintable(file.fileName())
  39.              << " for writing: " << qPrintable(file.errorString())
  40.              << endl;
  41.         return false;
  42.     }
  43.  
  44.     ftp.connectToHost(url.host(), url.port(21));
  45.     ftp.login();
  46.     ftp.get(url.path(), &file);
  47.     ftp.close();
  48.     return true;
  49. }
  50.  
  51. void FtpGet::ftpDone(bool error)
  52. {
  53.     if (error) {
  54.         cerr << "Error: " << qPrintable(ftp.errorString()) << endl;
  55.     } else {
  56.         cerr << "File downloaded as " << qPrintable(file.fileName())
  57.              << endl;
  58.     }
  59.     file.close();
  60.     emit done();
  61. }
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Qt Code: 
  1. #include <QtCore>
  2. #include <iostream>
  3.  
  4. #include "ftpget.h"
  5.  
  6. using namespace std;
  7.  
  8. int main(int argc, char *argv[])
  9. {
  10.     QCoreApplication app(argc, argv);
  11.     QStringList args = app.arguments();
  12.  
  13.     if (args.count() != 2) {
  14.         cerr << "Usage: ftpget url" << endl
  15.              << "Example:" << endl
  16.              << "    ftpget ftp://ftp.trolltech.com/mirrors" << endl;
  17.         return 1;
  18.     }
  19.  
  20.     FtpGet getter;
  21.     if (!getter.getFile(QUrl(args[1])))
  22.         return 1;
  23.  
  24.     QObject::connect(&getter, SIGNAL(done()), &app, SLOT(quit()));
  25.  
  26.     return app.exec();
  27. }
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This is an example application from one of the QT devoted books.

It runs smoothly when the user is on-line.

The problem arises when the user has some connection problems.
Try to run the application while off-line.
The console becomes blocked and it will be until we connect ourselves to web or kill the process.

My question:
How to make our application quit with a certain warning for example after 10 seconds of unsuccessful trials to connect to the web?

PS. I tried to use QFtp::abort() with QTimer but it did not work!