Not getting reply for every Request sent.

R_cts

Hello I want to send data asynchronously to server and receive acknowledgement for every request. Whenever I am sending single request I am getting acknowledgement but if I am sending more than 1 then I am receiving response only for the last one.Thanks in advance.

m_pendingData.push_back(jsonObj);
  if(IsConnected())
  {
     if(m_pendingData.size() > 0)
     {
         QListIterator<QJsonObject> itr(m_pendingData);
         while(itr.hasNext())
         {
            QJsonObject localJsonObj = itr.next();
            m_ackData = localJsonObj.value("Result").toObject().value("AckData");
            output = QJsonDocument(localJsonObj).toJson(QJsonDocument::Compact);
            qDebug() << "output json data:" << localJsonObj;
               TestConnection(output);
         }
     }
void TestConnection(QByteArray output)
{

   m_manager = new QNetworkAccessManager(this);

   bool status = true;
   qDebug() << "Connection status:" << status;
   QNetworkRequest request(URL);

   request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");

   QNetworkReply *reply = m_manager->post(request,output);
   status &= static_cast<bool>(connect(m_manager, &QNetworkAccessManager::finished, [&]()
   {
      if(reply->error() == QNetworkReply::NoError)
      {
         QString answer = reply->readAll();

         if(m_ackData.toString() == answer)
         {
            qDebug() << "m_pendingData.size()" << m_pendingData.size();
            if(m_pendingData.size()>0)
            {
                m_pendingData.pop_front();
            }
         }
      }
      else
      {
         qDebug()<< "ERROR:" << reply->errorString();
      }
   }));

   status &= static_cast<bool>(connect(m_manager,SIGNAL(finished(QNetworkReply*)),this,SLOT(Finished(QNetworkReply*))));
   qDebug() << "Connection Status:" <<status;
}

Christian Ehrlicher

You create a new QNetworkAccessManager everytime you call TestConnection() which is wrong. Also your local reply variable goes out of scope due to the wrong usage of the lambda capture (&) - please read about lambda captures.