HttpClient timeout

[pljakobs]

I use HttpClient::downloadString to send an api ping to other devices with the callback implemented as a lambda.
Since I send out a number of pings in parallel, the callbacks all use up memory for a time.
However, when using this scheme, I seem to be leaking memory, my assumption is those are pings that never get answered.

Does the HttpClient have a (configurable) request timeout? Is the callback called with an error if the timeout runs out?

I guess the more memory conscious way is to have a single callback for all responses looking at the response source (I think httpResponse has the ip.address) and mark those systems alive.