QNetworkProxy

[becrux]

Hi everybody,

I'm fighting with QNetworkProxy all day, without solving my issue.

I commented step-by-step pieces of code all day, and at the end I found out that I cannot initialize my QHttp objects with QNetworkProxy correctly.

Briefly, my app starts, initialize widgets, it loads settings, and of course proxy settings.

void MainWidget::updateProxy()
{
  QList<Engine *>::const_iterator engine;
 
  if (rbProxyConnection->isChecked())
  {
    switch (cbProxyType->currentIndex())
    {
      case 0: proxy->setType(QNetworkProxy::HttpProxy);
              break;
 
      case 1: proxy->setType(QNetworkProxy::Socks5Proxy);
              break;
    }
 
    proxy->setHostName(leProxyHost->text());
    proxy->setPort(sbProxyPort->value());
    proxy->setUser(leProxyUsername->text());
    proxy->setPassword(leProxyPassword->text());
  }
  else
    proxy->setType(QNetworkProxy::NoProxy);
 
  for (engine = engines.constBegin(); engine != engines.constEnd(); ++engine)
    (*engine)->setProxy(proxy);
}

void MainWidget::updateProxy()
{
  QList<Engine *>::const_iterator engine;

  if (rbProxyConnection->isChecked())
  {
    switch (cbProxyType->currentIndex())
    {
      case 0: proxy->setType(QNetworkProxy::HttpProxy);
              break;

      case 1: proxy->setType(QNetworkProxy::Socks5Proxy);
              break;
    }

    proxy->setHostName(leProxyHost->text());
    proxy->setPort(sbProxyPort->value());
    proxy->setUser(leProxyUsername->text());
    proxy->setPassword(leProxyPassword->text());
  }
  else
    proxy->setType(QNetworkProxy::NoProxy);

  for (engine = engines.constBegin(); engine != engines.constEnd(); ++engine)
    (*engine)->setProxy(proxy);
}

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"proxy" is a "QNetworkProxy *" internal object of MainWidget. It's initialized in this way:

proxy = new QNetworkProxy(QNetworkProxy::NoProxy);

proxy = new QNetworkProxy(QNetworkProxy::NoProxy);

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All "engines" have no proxy configuration at all, but one, and it executes the following code:

void Flickrs::setProxy(const QNetworkProxy *newProxy)
{
  sizeRequest.setProxy(*newProxy);
  searchRequest.setProxy(*newProxy);
  photoInfoRequest.setProxy(*newProxy);
  photoDownload.setProxy(*newProxy);
}

void Flickrs::setProxy(const QNetworkProxy *newProxy)
{
  sizeRequest.setProxy(*newProxy);
  searchRequest.setProxy(*newProxy);
  photoInfoRequest.setProxy(*newProxy);
  photoDownload.setProxy(*newProxy);
}

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Of course, sizeRequest and all others are QHttp objects.

If I don't comment this code, it produces the following output:

QColor::setSystemNamedColor: Cannot perform this operation because QApplication does not exist
Floating point exception

while, if it's empty, everything is fine and my app is usable.

I really cannot understand the meaning of the error code. QColor?? Why?

Can you provide me some suggestions? I'm really lost

Thank you so much.

Tony.