Background: I'm trying to serve a server side rendered SPA from a poem backend. For this I wanted to wrap the StaticFilesEndpoint with my custom SpaEndpoint such that when the StaticFilesEndpoint fails to find a static asset at the given URL, I can fall back to loading and pre-rendering my SPA.

The problem arises from the fact, that I cannot clone a request and the endpoint moves the request, therefore once the StaticFilesEndpoint has processed the request, I have no access to the request anymore. Furthermore Request does not impl Clone, so that is also not an option.

Therefore my question: How can you wrap another endpoint, such that you can implement fallback logic. Or is there something I could do fundamentally different?