I have three different calendars syncing using caldav, one on fastmail and two on icloud. When I open the calendar view it’s often the case that one or more of these timeout (all of them are afflicted by this), so it seems that these calendars are not actually stored on the server but polled everytime I want to view them.
Are there any alternative integrations that will periodically sync the calendars and keep them on the server? Or can I self-host an app that does this and will never time out because it’s on my local network?
Sure there is! Look through the docs and make some test requests you can check with Curl or Python, and break down what is taking so long. Maybe have a look at the logs as a first step and see if there aren’t some warnings or errors that may point you in the right direction as well. Double check all your URL endpoints and check to ensure https and auth is all set properly. Lots of ways to attack it.
Don’t give up!