QNetworkReply::ProtocolUnknownError

如何解决QNetworkReply::ProtocolUnknownError

我有一个 qt 应用程序，我想用我的应用程序向 Web 服务发送请求。我的内容长度不是常数，所以我在另一个函数上计算它并在必要时调用它，我的主机是运行我的应用程序的同一网络上的 IIS 服务器。这是我的代码示例。

计算内容长度的函数：

uint32_t MainWindow::contentLenghtCalculator(QString unique_ID,bool status)
{

    QString status_str ;
    QString password = "password";

    if(status){
        status_str = "true";
    }
    else{
        status_str = "false";
    }

    this->globalRequest =
        "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
        "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" "
        "xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" "
        "xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
        "<soap:Body>"
        "<Control xmlns=\"http://www.tempuri.org\">"
        "<Number>";
    this->globalRequest.append(unique_ID).append("</Number><ConnStatus>");
    this->globalRequest.append(status_str).append("</ConnStatus><Pass>");
    this->globalRequest.append(password).append("</Pass>");
    this->globalRequest.append("</Control>"
                   "</soap:Body>"
                   "</soap:Envelope>");

    return this->globalRequest.size() ;

}

发送网络服务请求的函数：

void MainWindow::webServiceRequest()
{
    qnetworkrequest request;

    QNetworkAccessManager manager;


    int content_lenght = this->contentLenghtCalculator(this->unique_id,this->connectStatus);

    QString cont_length = QString::number(content_lenght);

    request.setRawHeader("Content-Type","text/xml; charset=utf-8");

    request.setRawHeader("Content-Lenght",cont_length.toUtf8());

    request.setRawHeader("SOAPAction","http://tempuri.org/Control");

    request.setUrl(QUrl("IISserverName.firm.firm/outsourceappfuncs/WebService.asmx"));

    QNetworkReply* reply = manager.post(request,this->globalRequest.toUtf8());

    QEventLoop eventLoop;

    QObject::connect(reply,SIGNAL(finished()),&eventLoop,SLOT(quit()));
    eventLoop.exec();

    if (reply->error() != QNetworkReply::NoError)
        qDebug() << "Network error: " << reply->error();
    else
        qDebug() << reply->readAll();

}

我对网络领域了解不多。我得到的错误是 QNetworkReply::ProtocolUnkNownError。我试图从那个问题中写出类似 QUrl 的答案：ProtocolUnknownError upon sending SOAP request in Qt 但我仍然遇到同样的错误。任何帮助都将得到认可。谢谢！