Function handle_request 

pub async fn handle_request<I, O, E, F, Fut, B, Err>(
    stdin: I,
    stdout: O,
    stderr: E,
    request_fn: F,
) -> Result<(), Error>
where
    I: AsyncRead + Unpin + 'static,
    O: AsyncWrite + Unpin,
    E: AsyncWrite + Unpin,
    F: FnOnce(Request<CgiIncoming<I>>, E) -> Fut,
    Fut: Future<Output = Result<Response<B>, Err>>,
    B: Body,
    B::Data: AsRef<[u8]> + Send + 'static,
    B::Error: Into<Error>,
    Err: Into<Error>,

Available on crate feature server only.

Handles a CGI request by converting it to an HTTP request, invoking the provided request function, and then converting the HTTP response back to a CGI response.