Not getting any response from post request in form url encoded format

ndiwan

Hi All,

I am trying to do a post request to a webservice with body containing user id , password and target info.
When i tried using PostMan , I am getting proper response, but when tried using Qt code,I am not getting response.
Below are the snap for the postman an Qt code. Could you please help. (For safety reason I am not posting real user id and password)

Thanks
Nitin

SGaist

Hi,

QNetworkAccessManager works asynchronously. You need to use signals and slots to properly handle the request and its answer,

ndiwan

Hi SGaist,

Do I need to do like this:

void HttpWorker::onPostAnswer(QNetworkReply* reply)
{
int statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
if(statusCode == 200)
{
const QJsonDocument response = QJsonDocument::fromJson(reply->readAll());
const QJsonObject response_json = QJsonDocument::fromVariant(response.object().value("smsession").toVariant()).object();
}
}

void HttpWorker::GetSiteminderToken()
{
QNetworkReply* reply;
QNetworkRequest request(QUrl("https://xxtest.employees.www.uprr.com/admin/login.fcc"));
request.setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded");

QUrlQuery postArray;
postArray.addQueryItem("TARGET" , "https://xxtest.employees.www.uprr.com/hmp/alert-handler/1.0/secure/jas/fetch-session-cookie");
postArray.addQueryItem("USER" , "abcd1234");
postArray.addQueryItem("PASSWORD" , "rfte123");

QNetworkAccessManager manager = new QNetworkAccessManager(this);
connect(manager, SIGNAL(finished(QNetworkReply)),
SLOT(onPostAnswer(QNetworkReply*)));
reply = manager->post(request, postArray.toString(QUrl::FullyEncoded).toUtf8());

}

But Still status code is 0. It should be 200.

Thanks

JonB

@ndiwan
I don't know, but maybe you should slot onto QNetworkReply::errorOccurred signal?

SGaist

Please use coding tags around your code to make it readable (the </> button on the toolbar).

That said the connect statement looks wrong since you have once a pointer for the signal and the other an object for the slot.

ndiwan

void HttpWorker::postFinished(QNetworkReply* rep)
{
QByteArray bts = rep->readAll();
QString str = QString::fromUtf8(bts);
qDebug().noquote() << "Reply:"<<str;
rep->deleteLater();
}

QString HttpWorker::GetSiteminderToken()
{

QNetworkReply* reply;
QNetworkRequest request(QUrl("https://xxtest.employees.www.uprr.com/admin/login.fcc"));
request.setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded");

QUrlQuery postArray;
postArray.addQueryItem("TARGET" , "https://xxtest.emp->oyees.www.uprr.com/hmp/alert-handler/1.0/secure/jas/fetch-session-cookie");
postArray.addQueryItem("USER" , "abcd1234");
postArray.addQueryItem("PASSWORD" , "frtg4567");
QNetworkAccessManager *manager = new QNetworkAccessManager(this);
connect(manager,SIGNAL(finished(QNetworkReply*)),this,SLOT(postFinished(QNetworkReply*)));
manager->post(request, postArray.toString(QUrl::FullyEncoded).toUtf8());

}

Still getting str as "" .

Thanks

JoeCFD

This may be helpful. Try to check your return in postFinished().
m_reply = m_networkAccessManager.post( request, byte_array );
if ( nullptr != m_reply ) {
    if ( m_reply->isRunning() ) {
        connect( m_reply, &QNetworkReply::finished,
                 this,    &MyClass::postFinished );
    }
    else { /* may be finished immediately*/
        postFinished();
    }
}

ndiwan

Sorry that didnt work.

JonB

@ndiwan
Put a breakpoint on entry to onPostAnswer(). Use the watch window to have a dig around in *reply to see what you can see there! Anything interesting? You say returned state code is 0, which I don't think is a code HTTP would return at all. I did also suggest you verify you do not get any error.

JoeCFD

print out the error message while m_reply has to be global in the class.
void MyClass::postFinished()
{
if ( nullptr != m_reply ) {
if ( QNetworkReply::NoError == m_reply->error() ) { /* update is successful */
}

JoeCFD

Try your QUrl with the following format:
http://user:password@domain.com/

ndiwan

HI All,

If you notice the body of my request, it has a target url that will return a cookie. That cookie should append to the final post request.
So is there any other way to handle cookies ?

Thanks