Hi Davide, unfortunately it is not possible to do this server-side. Kinvey's service is not involved in the upload itself, so we don't know when it finishes, however you can have the client trigger the server code as you mentioned.
about 5 years ago
Thanks Ivan, okay... I'll go for the client then.
Actually, since what I have to do is to call an app engine service to process the uploaded file, I'll try to see if there's a way to handle things from there... maybe with a timeout function trying a few retries till the file is fully uploaded, and the processing it.
Not a very elegant solution :D I'll think more into this.