Replacing QNetworkAccessManager for the great good

Everybody using Qt for networking for small tasks will sometimes face oddities of QNetworkAccessManager. This class aims to be useful and convenient while having few quite sensible drawbacks. First one of couse is inability to use it in blocking way. What you should do instead is to create instance of QEventLoop and connect it’s quit() signal with network manager.

QNetworkAccessManager networkManager;
QEventLoop loop;
QNetworkReply *netReply = networkManager.get(resource);
connect(netReply, SIGNAL(finished()), &loop, SLOT(quit()));

This is overkill and overengineering of course. This inconveniency strikes also when you try to use it from background thread for downloading something – QNetworkAccessManager needs an event loop and it will launch one more thread – it’s own to do all the operations required.

Also it has a lot of data, methods and abilities not needed for “everyday simple network operations” like querying some API or downloading files. I don’t know anybody who wasn’t looking for a substitude for it at least once. But fortunately the solution exists.