How to automate the iCal import in Plone 5.2

Can someone give me a short description how to automate the iCal import?
I know there are two possible ways with a cronjob script with wget or with a python script. But can someone post me the URL or a python code to trigger this "Save&Import" event? THX

I would assume that you can do this using plone.restapi. The upload of the iCal should not be different from uploading a standard File through plone.restapi...