如何从 QNetworkReply 读取数据？

Question

如何在 QWebPage 之前从特定 URL 的 QNetworkReply 响应中读取数据？但是当 finished() signal is emited the reply is read already by QWebPage, so connect readyRead() 或调用 reply->readAll() return 时什么都没有。我尝试在我自己的 QWebPage class 中重载 acceptNavigationRequest() 方法，像这样：

bool webPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, QWebPage::NavigationType type)
{
    //qDebug() << "filename = " << request.rawHeader("content-disposition");

    if(request.url().path() == QStringLiteral("download.php"))
    {
        QNetworkReply *reply = networkAccessManager()->get(request);
        QFile file;
        file.setFileName(filename);
        if(!file.open(QIODevice::ReadWrite))
        {
            /* handle error */
        }
        file.write(reply->readAll());
        file.close();
        return false;
    }

但我无法回复工作...returned 回复无效（甚至 return 一个 http 状态代码，我知道这意味着 http 请求已发送无效，但我不知道为什么）。

欢迎使用不同的方法来解决这个问题！

Answer 1

使用带有 lambda 表达式的已完成插槽，您可以这样做：-

QNetworkReply* reply = networkAccessManager()->get(request);

connect(reply, &QNetworkReply::finished, [=]() {

    if(reply->error() == QNetworkReply::NoError)
    {
        QByteArray response = reply->readAll();
        // do something with the data...
    }
    else // handle error
    {
      qDebug(pReply->errorString());
    }
});

如何从 QNetworkReply 读取数据？

How do I read the data from QNetworkReply?

c++

qt

qt5

qnetworkreply

windows-10