有谁会用QNetworkAccessManager啊？

[韭菜炒鸡蛋]

官方给的例子是

QNetworkRequest request;
request.setUrl(QUrl("http://qt.nokia.com"));
request.setRawHeader("User-Agent", "MyOwnBrowser 1.0");

QNetworkReply *reply = manager->get(request);
connect(reply, SIGNAL(readyRead()), this, SLOT(slotReadyRead()));
connect(reply, SIGNAL(error(QNetworkReply::NetworkError)),
this, SLOT(slotError(QNetworkReply::NetworkError)));
connect(reply, SIGNAL(sslErrors(QList<QSslError>)),
this, SLOT(slotSslErrors(QList<QSslError>)));

我想问的是如果在connect之前就完成数据传输的，还怎么触发readyRead信号啊？有大佬知道怎么回事不？