qt rest api example

Example 1: qt rest api

QUrl url;
url.setScheme(“http”);
url.setHost(“api.thingspeak.com”);
url.setPath(“/channels/”+CHNum+”/feeds.json”);
url.setQuery(“api_key=”+RDKey+”&results=10”);
request.setUrl(url);
reply=nwManager->get(request);

Example 2: qt rest api

QJsonDocument jsdoc;
jsdoc = QJsonDocument::fromJson(reply->readAll());
QJsonObject jsobj = jsdoc.object();
QJsonArray jsarr = jsobj[“feeds”].toArray();
foreach (const QJsonValue &value, jsarr) {
QJsonObject jsob = value.toObject();
qDebug() << jsob[“entry_id”].toInt();
qDebug() << jsob[“field1”].toString();
qDebug() << jsob[“field2”].toString();
qDebug() << jsob[“field3”].toString();
qDebug() << jsob[“created_at”].toString();
}
reply->deleteLater();

Example 3: qt rest api

//Prepare querystr similar to above steps
request.setHeader(QNetworkRequest::ContentTypeHeader, “application/x-www-form-urlencoded”);
QByteArray postdata = Qvariant(querystr).toByteArray();
restclient->post(myurl,postdata);

Example 4: qt rest api

QVariantMap feed;
feed.insert(“api_key”,WRKey);
feed.insert(“field1”,QVariant(tval).toString());
feed.insert(“field2”,QVariant(hval).toString());
feed.insert(“field3”,Qvariant(pval).toString());
QByteArray payload=QJsonDocument::fromVariant(feed).toJson();