Custom QNetworkReply for WebView

Hi all,

I'm trying to create a processing tunnel for web-browser (based on demo's browser), which should translate XML data into HTML representation.

I have overriden QNetworkAccessManager::createRequest to create new replies.
Also I have subclassed QNetworkReply and implemented its virtual methods: bytesAvailable, readData, close and abort. But no one of them are called, even signals like readyRead() and finished() are emited. What is wrong?

Code:

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ProcessedReply::ProcessedReply(QNetworkAccessManager::Operation op, const QNetworkRequest &req, const QByteArray &data, QObject *parent)
				: QNetworkReply(parent), m_data(data), m_pos(0)
{
	setOperation(op);
	setRequest(req);
	emit readyRead();
	emit downloadProgress(0, m_data.size());
	emit downloadProgress(m_data.size(), m_data.size());
	emit finished();
}
 
qint64 ProcessedReply::bytesAvailable() const
{
	return m_data.size();
}
 
void ProcessedReply::close()
{
 
	QIODevice::close();
	m_pos = 0;
}
 
qint64 ProcessedReply::readData(char *data, qint64 maxlen)
{
	qint64 result = 0;
	QByteArray portion = m_data.mid(m_pos,maxlen);
	result = portion.size();
	strcpy(data, portion.data());
	emit readyRead();
	return result;
}
 
void ProcessedReply::abort()
{
	m_pos = 0;
}
 
QNetworkReply *NetworkAccessManager::createRequest(Operation op,const QNetworkRequest &req,QIODevice *outgoingData)
{
	QNetworkReply *reply = QNetworkAccessManager::createRequest(op,req,outgoingData);
	QString contentType = reply->header(QNetworkRequest::ContentTypeHeader).toString();
	QUrl url = reply->url();
	QString scheme = url.scheme();
	QString fileName = url.toLocalFile();
	bool localLpml = url.scheme()=="file" && fileName.endsWith(".lpml");
	if (contentType.contains("lpml") || localLpml) {
		QByteArray data = LPMLProcessor::instance()->handleXMLData(reply);
		QNetworkReply *newReply = new ProcessedReply(op, req, data, this);
		return newReply;
	}
	return reply;
}

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