Question

我试图登录网页，然后下载只有会员可以下载的一些数据。

我已执行发布请求，然后执行 get 请求，由于某种原因 get 请求首先完成。< / p>

有没有办法等待帖子完成或先完成？

编辑：

void downloader::LoginToHost()
{
    QNetworkRequest request(QUrl("http://www.example.com/login.php"));
    request.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/x-www-form-urlencoded"));

    QByteArray data("email=example&password=");
    manager->post(request,data);
}

void  downloader::Do_Request(QUrl url)
{
    manager->get(QNetworkRequest(url));
}

void downloader::finished(QNetworkReply * reply)
{
    QMessageBox mess;

    if(reply->error() == QNetworkReply::NoError)
    {
        std::ofstream source("source-code.txt");
        QString content = reply->readAll();
        source << content.toStdString() << std::endl;
        source.close();

        mess.setText("Done download!");
    }
    else mess.setText(reply->errorString());

    mess.exec();
}

Answer 1

发送帖子，在帖子返回之前不发送get，并在QNetworkReply中触发finished信号。

假设有两个请求，一个用于帖子，一个用于get，你已经设置了，这里是你可以做的概述： -

QNetworkRequst postRequest;
QNetworkRequest getRequest;

发送postRequest返回QNetworkReply ...

QNetworkAccessManager* networkAccessManager = new QNetworkAccessManager;

QNetworkReply postReply = networkAccessManager->post(postRequest, someData);
QNetworkReply getReply = nullptr; // C++ 11 nullptr

然后您可以连接到postReply完成的信号： -

// using a connection to a lambda function, send the get request when post has finished
connect(postReply, &QNetworkReply::finished, [this, networkAccessManager, getRequest, getReply](){

    // handle the reply...
    ...
    // send the getRequest
    getReply = networkAccessManager->get(getRequest);

});

qt发布并获取请求

1 个答案: