QNetworkReply: how to know when data is sent?

[wysota]

QHttp should work fine. It has a dataSendProgress() signal.

[mentalmushroom]

Ok, i thought to use it from the very beginning, I didn't just because I read the following in the Qt documentation: "This class is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code."

[wysota]

Yes, that's true but your requirement is somewhat different from what people use HTTP for in their apps. I don't know why you don't want to wait for the server's response -- you might get a 404 or 500 or some other fault. I think it's worth knowing if your request went to /dev/null or not.

[mentalmushroom]

I may want to upload some data or send logout. Sometimes it takes a several seconds (depending on connection, network problems etc). In my application it is more important to proceed quickly than know whether the data was uploaded or not. I don't care much how successful was logout sent to some third party server, but I want my app to be closed quickly, so users won't need to wait until slow server responds.

[wysota]

So why do you want to send the logout at all if you don't care if it works or not?

[mentalmushroom]

I send logout because it is better to send than not to send (third party server recommends to send it). Also I upload some data that may be useful, but if it fails it is not critical. Moreover if logout fails in most cases I can't do anything with that, so result can be only logged somewhere and it is not that important for users. But as long as it doesn't make my application inconvenient to users I think it is better to call logout and upload all the data that may be useful.

[wysota]

Then don't wait for anything, send the data and start closing your app. With a bit of luck, the request will go through. If not then you don't care anyway... If you do care, then wait a predefined amount of time for a response and if you don't get it during this period, abandon the request and close your app.

[mentalmushroom]

Well, eventually I came to the same approach. I can afford it to wait for let's say 1 second, the only bad side is that waiting for data sent in most cases would take less time, but with this approach I still have to wait 1 second that is for the worst case. My question: is there any place where I can ask to add this feature? To my mind having dataSent signal would be useful.

[wysota]

Qt is open-source, add the feature yourself. It should be just a couple lines of code.