Can't serve encoded (e.g. gzip) resources

There's this code in server.Request.process:

        try:
            resrc = self.site.getResourceFor(self)
            if resource._IEncodingResource.providedBy(resrc):
                encoder = resrc.getEncoder(self)
                if encoder is not None:
                    self._encoder = encoder
            self.render(resrc)
        except:
            self.processingFailed(failure.Failure())

And since Klein resources don't provide _IEncodingResource the resource is never asked for an encoder. So things like this serve but aren't gzipped:

class GzipFile(File):        
    def getChild(self, path, request):
        child = File.getChild(self, path, request)
        return EncodingResourceWrapper(child, [GzipEncoderFactory()])

class MainApp(object):

    app = Klein()

    @app.route('/static', branch=True)
    def static(self, request):
        return GzipFile('/tmp')

I'm not sure where the code goes that would allow serving gzipped data. I can easily duplicate what the GzipEncoder does in my own code, but it seems like a useful thing for klein to provide (or at least facilitate).

I'm happy to do the work if someone can point me toward where the code should go.

Start at server.Request.process, where Klein resources are checked for _IEncodingResource and rendered, and compare that path with the EncodingResourceWrapper and GzipEncoderFactory example in the issue. Trace how a routed resource reaches this code and determine how encoded resources should be recognized or supported; done means the example serves gzip-encoded data through Klein.