Interface HttpxHandlerResponse

Elements in other namespaces to carry inside the , verbatim.

Defaults to 200.

CONNECT only: turns a 2xx answer into a tunnel (design §4.2). The response carries no body; instead one IBB stream, opened by this server after the reply, carries bytes both ways, and this callback receives it. The library does not dial anything — the handler connects to the destination first (so it can answer 502/504 instead), then returns 2xx with this callback and pipes the two together.

It is called exactly once for a 2xx response, and never for any other status. If the stream cannot be opened (the requester has gone, or refuses the ), it is still called, with a tunnel that is already dead: readable errors and write() rejects — so the handler's ordinary error path is also where it closes the destination socket.