I'm about to program a file upload in a Grails app - using *g:form with* *"multipart/form-data"*. Before saving it to disk, I'll check if the file is bigger than a given number of bytes, in which situation it will be discarded. My concern is: is the temporary file stored in some directory before it is moved to the final destination ? Because if so, I'll need to program some cleaning script for deleting those files.