[Interest] QNetwork classes for submitting google forms
Max Paperno
max-l at wdg.us
Fri Jun 11 23:10:57 CEST 2021
Hello Nicholas,
> 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
From the docs[1]: QNetworkAccessManager has an asynchronous API.
That means you have to wait for a finished() signal before trying to
determine the status or read response data. The call to post() returns
right away, probably before the request is even sent.
The docs have a pretty basic example, but to put it into your context,
it would look something like this:
// ...
QNetworkAccessManager networkManager;
bool gotResponse = false;
QObject::connect(&networkManager, &networkManager::finished,
[&gotResponse](QNetworkReply *reply) {
int status = reply->attribute(
QNetworkRequest::HttpStatusCodeAttribute).toInt();
qDebug() << status;
// etc....
gotResponse = true;
});
networkManager.post(request,
postData.toString(QUrl::FullyEncoded).toUtf8());
while (!gotResponse)
sleep(1) // or whatever sleep method, just waiting for a response.
return 0;
}
HTH,
-Max
[1]: https://doc.qt.io/qt-5/qnetworkaccessmanager.html
On 6/11/2021 4:22 PM, Nicholas Yue wrote:
> Hi,
>
> I am trying to submit google forms programmatically via C++ and Qt classes
>
> I am basing my study on the following
>
> https://stackoverflow.com/questions/17964429/google-forms-response-with-python#17965510
>
> 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
> <mailto:abc.xyz at gmail.com>");
> postData.addQueryItem("entry.2020959411", "Qt Query");
>
> /*
> *
> url =
> 'https://docs.google.com/forms/d/152CTd4VY9pRvLfeACOf6SmmtFAp1CL750Sx72Rh6HJ8/formResponse'
> 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("https://docs.google.com/forms/d/152CTd4VY9pRvLfeACOf6SmmtFAp1CL750Sx72Rh6HJ8/formResponse");
>
> // ...
> QNetworkRequest request(serviceUrl);
> //request.setHeader(QNetworkRequest::ContentTypeHeader,
> // "application/x-www-form-urlencoded");
> QNetworkAccessManager networkManager;
> QNetworkReply* reply;
> reply = networkManager.post(request,
> postData.toString(QUrl::FullyEncoded).toUtf8());
> 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
> http://au.linkedin.com/in/nicholasyue
> https://vimeo.com/channels/naiadtools
>
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>
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