[Qt-interest] Subclass QNetworkRequest

[Thiago Macieira]

Em Segunda-feira 22. Fevereiro 2010, às 23.20.14, Jason Wood escreveu:
> Hi,
> 
> Is it possible to subclass QNetworkRequest to throttle outgoing data?

No.

It's possible to subclass QNetworkRequest, but it won't do you any good. It 
doesn't contain any data.

Did you mean subclassing QNetworkReply?

> It
> doesn't seem to implement QIODevice so I'm not exactly sure how I could do
> it, does anyone have any ideas? I was originally using a throttled
> QIODevice as the data in the QNetworkAccessManager::post() method which is
> OK in Windows but OSX seems to have a much larger buffer size and so
> buffering to low speed (~5kB/s) causes the connection to timeout because
> the data is not sent until the internal buffer is full. Please correct me
> if I'm wrong but that does seem to be the case from my testing.

Your approach is correct.

Your QIODevice must emit readyRead() and supply with enough data to keep the 
transfer rate limited. There should be no buffering effects on sending data, so 
if you have a testcase showing it failing on Mac, we'll be interested.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
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