Modular fallback policy for requests

[coderanger@…]

Attached is a patch against r3356 to implement modular fallback handlers. This allows customizations beyond the simple 404 response. An example handler that uses the wiki is included as WikiFallbackModule.

[coderanger@…]

Fallback handler patch

[coderanger@…]

This idea could probably now be done using the pre/post request processors, if a suitable call was added before rejecting the request.

[athomas]

Actually I don't think any changes are required. Something like this should do the job:

class DefaultHandler(Component):
    implements(IRequestFilter)

    def pre_process_request(self, req, handler):
        from trac.wiki.model import WikiPage
        name = req.path_info.lstrip('/')
        page = WikiPage(self.env, name)
        if page.exists:
            req.redirect(req.href.wiki(name))
        else:
            return handler

    def post_process_request(self, req, template, content_type):
                return (template, content_type)

Then in trac.ini:

[trac]
request_filters = DefaultHandler

[athomas]

Err, insert appropriate check for handler is None