QtWebkit:如何检查HTTP状态代码？

#include <QtNetwork>

// 槽函数，处理请求完成后的响应
void replyFinished(QNetworkReply *reply)
{
    // 检查网络错误
    if (reply->error() != QNetworkReply::NoError) {
        qDebug() << "Network error:" << reply->errorString();
        return;
    }

    // 获取HTTP状态代码
    QVariant statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
    if (statusCode.isValid()) {
        qDebug() << "HTTP status code:" << statusCode.toInt();
    }
}

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

    QNetworkAccessManager manager;

    // 发送HTTP请求
    QNetworkReply *reply = manager.get(QNetworkRequest(QUrl("http://example.com")));

    // 连接请求完成信号
    QObject::connect(reply, &QNetworkReply::finished, &app, [=]() {
        replyFinished(reply);
        reply->deleteLater();
        app.quit();
    });

    return app.exec();
}