如何将QNetworkRequest输出到原始的Http请求？

#include <QCoreApplication>
#include <QNetworkRequest>
#include <QNetworkAccessManager>
#include <QUrl>
#include <QDebug>

void printRawHttpRequest(const QNetworkRequest& request)
{
    // 获取URL、请求方法和请求头信息
    QString url = request.url().toString();
    QString method = request.attribute(QNetworkRequest::CustomVerbAttribute).toString();
    QList<QByteArray> headerKeys = request.rawHeaderList();
    QString headers;

    // 构建请求头字符串
    foreach (const QByteArray& key, headerKeys) {
        QString value = request.rawHeader(key);
        headers += QString("%1: %2\n").arg(key.constData()).arg(value.constData());
    }

    // 构建原始的HTTP请求字符串
    QString httpRequest = QString("%1 %2 HTTP/1.1\n%3\n").arg(method, url, headers);

    // 输出原始的HTTP请求字符串
    qDebug() << httpRequest;
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QNetworkAccessManager manager;
    QNetworkRequest request(QUrl("https://www.example.com"));
    request.setRawHeader("User-Agent", "MyCustomUserAgent");

    printRawHttpRequest(request);

    return a.exec();
}

GET https://www.example.com HTTP/1.1
User-Agent: MyCustomUserAgent