Is it possible to implement the CONNECT HTTP method with the Snap framework?

Question

I'm looking into possibilities how to implement the CONNECT HTTP method that allows tunneling data over HTTP. However, I couldn't find a way how to implement bi-directional processing within one Snap request. The closest thing I found was transformRequestBody

transformRequestBodySource :: (forall a. Enumerator Builder IO a) -> Snap ()

but this only transforms request input into response output, while I need to process input and output simultaneously to relay data to the requested target resource.

Answer 1

I believe this is via escapeHttp. I discovered this by looking at the source for websockets-snap, which presumably is the right way to upgrade a connection.

For reference, in the WAI world this is handled via the responseRaw function.