[undertow-dev] Download Bandwidth Throttling Handler

Hi I am looking for a handler that throttles downloads to a configurable download rate. As far as I can see, there is no such handler yet available. I can find good solution based on servlets but I would like to solve this requirement with a undertow handler. How difficult is it implement such a handler? May you can give just a little hint and I could proceed. That would be great. Ralf