I'm trying to figure out a more flexible way to do QNetworkReply. Ideally this
would be through some async/await but I don't think Qt is "there" yet. (C++20
defines async/await, but there is not a library yet, and even Qt6 doesn't
target C++20). So the callback lambda handler looks like the best option for
now.
I have a QObject derived class, with a post() function. It takes an endpoint,
and object (to be converted to JSON) and a lambda. Example:
remoteCloud->post("/login", credentials, [=](QNetworkReply* reply){
if (reply->error() == QNetworkReply::NoError) {
update("cartridge",
{{"synced", QDateTime::currentDateTime()}},
{{"cartridgeId", map["cartridgeId"]}});
}
reply->deleteLater();
});
With an implementation of:
template<typename F>
QNetworkReply *RemoteCloud::post(const QString& endpoint, const QVariantMap&
item, F &lambda) {
QNetworkReply* reply = m_nam.post(QNetworkRequest(endpoint),
JSON(item));
connect(reply, &QNetworkReply::finished, lambda);
return reply;
}
Note that a lot of the Qt examples use a connect statement like this:
connect(reply, &QNetworkReply::finished, [request, reply](){ ... });
But when I tried to set this up, I either got static assert errors or l-value
errors.
However I am trying to go one better and have my RemoteCloud::post set up the
connect with the lambda. Is this possible?
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