| [15 Nov 2013] | Track C++ application with Google Analytics and Qt |
You can use Google Analytics to generate detailed statistics about visitors of a website or a mobile application. You can also use this service to track desktop offline applications as well. Following code snippet shows how to notify Google Analytics about usage of C++ application developed with Qt library. First, what you should do is to register Google Analytics account and add new property. To track desktop application you can add web-page property or mobile application property. This choise determines which parameters are required in a request to Google Analytics. Following code assumes that property is of web-page type. After registration, you will receive property identification code, like UA-12345678-1. It should be provided as tid parameter and encoded into the request.
Initialization of QNetworkAccessManager:
void Analytics::initialize()
{
// Create new QNetworkAccessManager
m_manager = new QNetworkAccessManager(this);
// Call slot_receive() when reply is received
QObject::connect(m_manager, SIGNAL(finished(QNetworkReply *)),
this, SLOT(slot_receive(QNetworkReply *)));
// Send requests to Google Analytics while app is running
QTimer * timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(slot_requestAnalyticsView()));
timer->start(5 * 60 * 1000); // send requests every 5 minutes
slot_requestAnalyticsView(); // send first request
}
Request to Google Analytics (more about paremeters is here):
void Analytics::slot_requestAnalyticsView()
{
// create request and set URL of receiver
QNetworkRequest request;
QUrl host("http://www.google-analytics.com/collect");
request.setUrl(host);
request.setHeader(QNetworkRequest::ContentTypeHeader,
"application/x-www-form-urlencoded");
// setup parameters of request
QString requestParams;
requestParams += "v=1"; // version of protocol
requestParams += "&t=pageview"; // type of request
requestParams += "&tid=UA-12345678-1"; // Google Analytics account
requestParams += "&cid=" + getMacAddress(); // unique user identifier
requestParams += "&dp=ApplicationName"); // name of page (or app name)
requestParams += "&ul=" + QLocale::system().name(); // language
// send request via post method
m_manager->post(request, requestParams.toStdString().c_str());
}
Get reply from Google Analytics:
void Analytics::slot_receive(QNetworkReply * reply)
{
// Output information about reply
qDebug()<<"RequestUrl:"<request().url();
qDebug()<<"Status:"<attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
qDebug()<<"Error:"<error();
QByteArray bytes=reply->readAll();
qDebug()<<"Contents" << QString::fromUtf8(bytes.data(), bytes.size());
}
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