[PyQt] Subclassing QNetworkReply

[Detlev Offenbach]

On Montag, 2. März 2009, Phil Thompson wrote:
> On Mon, 2 Mar 2009 18:19:57 +0100, Detlev Offenbach
>
> <detlev at die-offenbachs.de> wrote:
> > Hi,
> >
> > I am trying to write a subclass of QNetworkReply. This subclass needs to
> > have
> > it's own variant of the readData protected method. However, it seems,
>
> that
>
> > this method doesn't work correctly. How do I have to do this correctly.
>
> My
>
> > code is shown below.
> >
> > --------------
> > class HelpNetworkReply(QNetworkReply):
> >     def __init__(self, request, fileData):
> >         QNetworkReply.__init__(self)
> >
> >         self.__data = QBuffer(fileData)
> >
> >         self.setRequest(request)
> >         self.setOpenMode(QIODevice.ReadOnly)
> >
> >         self.setHeader(QNetworkRequest.ContentTypeHeader,
> > 		       QVariant("text/html"))
> >         self.setHeader(QNetworkRequest.ContentLengthHeader,
> >                        QVariant(QByteArray.number(fileData.length())))
> >         QTimer.singleShot(0, self, SIGNAL("metaDataChanged()"))
> >         QTimer.singleShot(0, self, SIGNAL("readyRead()"))
> >
> >     def abort(self):
> >         # do nothing
> >         pass
> >
> >     def readData(self, buffer, maxlen):
> >         l = self.__data.readData(buffer, maxlen)
> >         if self.__data.bytesAvailable() == 0:
> >             QTimer.singleShot(0, self, SIGNAL("finished()"))
> >         return l
> > --------------
>
> The Python signature is slightly different as Python strings aren't
> mutable. There is no buffer argument and you should return the data as a
> Python string.
>
> Phil
> _______________________________________________
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So I have to "return l, buffer" with buffer being a Python string. Will this 
work even if the method is called from some C++ code of the Qt4 libraries 
(e.g. QWebView or QWebPage)?

Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de