QNetworkReply - connection established, first byte written, etc

Question

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

When the underlying socket connection is established
When the first byte of the request is sent
When the first byte of the response received
When the last byte of the response finished

(3) and (4) can be determined by listening for the downloadProgress 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.

Could you tell us why you need to know the first two things from your list? — Piotr Dobrogost, Jan 25 '11 at 23:38
I'm trying to model how long it takes to download a website. — marketer, Jan 26 '11 at 00:53

score 1 · Answer 1 · answered Feb 21 '11 at 05:24

1

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?

answered Feb 21 '11 at 05:24

Ariya Hidayat

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+1 Nice code. However I don't see how it gives answer to the second question - *When the first byte of the request is sent?* – Piotr Dobrogost Feb 27 '11 at 11:20
I believe that's fairly low level. It depends on how many HTTP connections are still available, caching, pipelining, etc... – Ariya Hidayat Mar 14 '11 at 06:02

score 0 · Answer 2 · answered Jan 25 '11 at 23:34

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.

QNetworkReply - connection established, first byte written, etc

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