[Zope] Product that catches webdav PUTs and does something else

Folks, I'm trying to create a product (dtml-documentish) that will allow me to catch PUT requests from Netscape Composer so that I can clean up the mess that Composer makes of dtml before the upload is actually added to the ZODB. Is this feasible idea *without patching and Zope source*? Will Zope let me define a 'PUT' method in the product that gets invoked when an upload is tried? Or is the procedure pre-defined in the guts of Zope? Any help is much appreciated. Cheers Tim