[Interest] QNetwork classes for submitting google forms

Nicholas Yue yue.nicholas at gmail.com
Fri Jun 11 22:22:12 CEST 2021


I am trying to submit google forms programmatically via C++ and Qt classes

I am basing my study on the following


I got the Python version running and returned a 200 response.

I tried converting the code to C++ and Qt but was not successful. I get a
response of '0' zero

I would like to know if I am using the Qt QNetwork classes correctly to
submit a post to a URL that is a Google form

#include <QtNetwork/QNetworkRequest>
#include <QtNetwork/QNetworkAccessManager>
#include <QUrlQuery>
#include <QDebug>
#include <QNetworkReply>

int main()

    QUrlQuery postData;
    postData.addQueryItem("emailAddress", "abc.xyz at gmail.com");
    postData.addQueryItem("entry.2020959411", "Qt Query");

    url = '
    form_data = {'entry.2020959411': '18+ sollte absolute Pflicht sein',
                 #'entry.2020959411': 'Alter sollte garkeine Rolle spielen',
                 #'entry.2020959411': '17+ wäre für mich vertretbar',
                 #'entry.2020959411': '16+ wäre für mich vertretbar',
                 #'entry.2020959411': '15+ wäre für mich vertretbar',
                 #'entry.2020959411': 'Ausnahmen von der Regel - Dafür?',
                 #'entry.2020959411': 'Ausnahmen von der Regel - Dagegen?',
                 #'entry.2020959411': '__other_option__',
                 #'entry.2020959411.other_option_response': 'test',
                 'draftResponse': [],
                 'pageHistory': 0}     *

    QUrl serviceUrl("

    // ...
    QNetworkRequest request(serviceUrl);
    //    "application/x-www-form-urlencoded");
    QNetworkAccessManager networkManager;
    QNetworkReply* reply;
    reply = networkManager.post(request,
    QVariant statusCode = reply->attribute(
QNetworkRequest::HttpStatusCodeAttribute );
    int status = statusCode.toInt();
    qDebug() << status;
    if ( status != 200 )
        QString reason = reply->attribute(
QNetworkRequest::HttpReasonPhraseAttribute ).toString();
        qDebug() << reason;

return 0;

Nicholas Yue
Graphics - Arnold, Alembic, RenderMan, OpenGL, HDF5
Custom Dev - C++ porting, OSX, Linux, Windows
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