The current implementation of handlers is a little bizarre, with each handler both having to register itself and check its own name. I'm not sure where that comes from, but I can't help thinking the ap_provider API might be a more rational way to declare handlers.
We have one frequently-requested feature that IMO we should support: cascaded/fallback handlers. The request for this typically says "if a document isn't there, then use my handler as backup". ErrorDocument offers a limited workaround, but (a) This shouldn't have to be an error path (b) This should be able to cascade So, how about AddHandler & friends taking a *list* of handlers as argument (let's call the new version AddHandlerByExt)? Then we can run each handler in turn until one returns a value other than DECLINED. That would be coupled with the default handler being assigned a name and being configurable to appear anywhere in the list, so "fall back to my CGI if there's no file of that name" becomes "AddHandlerByExt .html default cgi-script". ErrorDocuments are invoked when we fall off the end of the list. For a slightly bigger change, we can use ap_provider on top of that to declare and reference handlers. -- Nick Kew