Handshake fails with Chrome as client

It seems like QWebSocketHandshakeRequest::readHandshake() fails if cant read the whole GET http request right now.
When I'm using Chrome as client I see that first textStream.readLine()in QWebSocketHandshakeRequest::readHandshake() returns only "G" instead of full http request so function returns false.
If insert line:
if (pTcpSocket->bytesAvailable() < 150) return;
into the slot QWebSocketServerPrivate::handshakeReceived() before disconnect from QTcpSocket::readyRead() then connection was successfull.