QWebSocket closeCode always 1000 and QAbstractSocket::RemoteHostClosedError

[Xardas]

example server:

wsstestsrv::wsstestsrv(QObject *parent)
	: QObject(parent)
{
	srv = new QWebSocketServer(QStringLiteral("test"), QWebSocketServer::SecureMode, this);
	srv->setSslConfiguration(sslConf);

	if (srv->listen(QHostAddress::AnyIPv4, 13000))
	{
		qDebug() << QString("Listen on: %1 port: %2").arg(srv->serverAddress().toString()).arg(srv->serverPort());
		connect(srv, &QWebSocketServer::newConnection, this, &wsstestsrv::onNewConnection);
	}
	else
		qDebug() << srv->errorString();
}

void wsstestsrv::onNewConnection()
{
	QWebSocket *socket = srv->nextPendingConnection();

	connect(socket, &QWebSocket::connected, [=]() { qDebug() << "connected!"; });
	connect(socket, &QWebSocket::disconnected, [=]() { qDebug() << "disconnected!" << socket->closeCode();  });

	typedef void (QWebSocket:: *sslErrorsSignal)(const QList<QSslError> &);
	connect(socket, static_cast<sslErrorsSignal>(&QWebSocket::sslErrors),
		[&](const QList<QSslError> &errors) {
		for (const QSslError &e : errors)
			qDebug() << e; });
	connect(socket, QOverload<QAbstractSocket::SocketError>::of(&QWebSocket::error), [&](QAbstractSocket::SocketError e) {qDebug() << e; });
}

example client:

wssclient::wssclient(QObject *parent)
	: QObject(parent)
{
	socket = new QWebSocket();
	connect(socket, &QWebSocket::connected, [&]() { qDebug() << "connected!"; });
	connect(socket, &QWebSocket::disconnected, [&]() { qDebug() << "disconnected!"; });

	typedef void (QWebSocket:: *sslErrorsSignal)(const QList<QSslError> &);
	connect(socket, static_cast<sslErrorsSignal>(&QWebSocket::sslErrors),
		[&](const QList<QSslError> &errors) {
		for (const QSslError &e : errors)
			qDebug() << e;
		socket->ignoreSslErrors(); });
	connect(socket, QOverload<QAbstractSocket::SocketError>::of(&QWebSocket::error), [&](QAbstractSocket::SocketError e) {qDebug() << e; });

	socket->open(QUrl("wss://127.0.0.1:13000"));

	QTimer::singleShot(3000, [&]() {socket->close(QWebSocketProtocol::CloseCodeGoingAway); });
}

Hi,
First problem:
After remote client close, server socket randomly emit QAbstractSocket::RemoteHostClosedError (not every close)
Second:
closedCode always 1000(NORMAL)

any advices how to fix this?

P.S.(Qt 5.10/Windows 10 Pro)

[ARasotorguev]

@Xardas You find solution for this problem?
We has the same local ws and websocket closed with error RemoteHostClosedError

[wanjm]

I come across the same problem.
is it a bug?

[AlexGuo1998]

After some debugging it seems to be a bug fixed in Qt 6.4. (and backported in 6.2/6.3)
According to the old code, QWebSocketPrivate::processData used to be connected using Qt::QueuedConnection, so it may be called after QWebSocketPrivate::processStateChanged. This means the close frame can be unprocessed, leaving closedCode in 1000.
The commit fixing this is e1c92b57.