[Zope] get full pathname file from form

Hi all, I want to upload a file with this form. <FORM ACTION="upload_file" METHOD="POST" ENCTYPE="multipart/form-data"> <INPUT TYPE="FILE" NAME="FILE" > <INPUT TYPE="SUBMIT" VALUE="Upload" NAME="ACTION" > </FORM> To check the size with os.path.getsize(file) I need the filename with the whole path. How can I get this from the form variables ? Regards. Michael