QNetworkReply - connection established, first byte written, etc

I'd like to log the lifetime of a QNetworkReply object. This includes:

1. When the underlying socket connection is established
2. When the first byte of the request is sent
3. When the first byte of the response received
4. When the last byte of the response finished

(3) and (4) can be determined by listening for the downloadProgress 开发者_C百科signal, but I'm not sure how to do (1) and (2). Is there a way to listen on the underlying socket of a QNetworkReply? The uploadprogress signal doesn't seem to be triggered for GET requests.

I have no idea if (1) is possible but the others are easy. Have you seen my network trace example? Does it not work for your case?

As far as I know Qt does not expose mechanism used by QNetworkAccessManager to get data so I think you can't accomplish neither the first nor the second task from your list.
Please remember that QNetworkAccessManager handles not only http(s): schemes but also local ones like file: and qrc: which do not require any socket connection.