Downloading a File with QNetworkAccessManager is 30 Times Slower than It Should Be

Qrqtow

This is the code I'm using

	QElapsedTimer* timer = new QElapsedTimer;
	timer->start();
	QNetworkAccessManager* manager = new QNetworkAccessManager;
	QObject::connect(manager, &QNetworkAccessManager::finished,
		this, [=](QNetworkReply* reply)
	{
			cout << timer->elapsed();
		}
	});
	std::string urlS = "https://someUrl/file.zip";
	QNetworkRequest req(QUrl(QString::fromStdString(urlS)));
	manager->get(req);

It takes about 150 seconds to download my file that way, while downloading it any other way (chrome, postman, curl, libcurl) takes 5 seconds. I guess it has something to do with tls because while experimenting I noticed the problem only happens for https requests.

I'm using Qt 6.2.2 on windows and the tls dlls I'm using are the ones that are installed by the qt installer.

jsulm

@Qrqtow You should also connect slots to
https://doc.qt.io/qt-5/qnetworkreply.html#error https://doc.qt.io/qt-5/qnetworkaccessmanager.html#sslErrors
https://doc.qt.io/qt-5/qnetworkreply.html#errorOccurred
https://doc.qt.io/qt-5/qnetworkreply.html#sslErrors

Check https://doc.qt.io/qt-5/qnetworkreply.html#error

Qrqtow

@jsulm None of them is emitted and the file is downloaded successfully. What else can I try?