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....@gmail.com
<mailto:abc....@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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