rust-http-handle_request-method-cascades.rs

    fn handle_request(&self, _r: &Request, w: &mut ResponseWriter) {
        w.headers
            .. date = Some(time::now_utc())
            .. content_length = Some(14)
            .. content_type = Some(MediaType {
                type_: StrBuf::from_str("text"),
            	subtype: StrBuf::from_str("plain"),
            	parameters: vec!((StrBuf::from_str("charset"), StrBuf::from_str("UTF-8")))
            })
            .. server = Some(StrBuf::from_str("Example"));

        w.write(bytes!("Hello, World!\n")).unwrap();
    }