rust-http-handle_request.rs

    fn handle_request(&self, _r: &Request, w: &mut ResponseWriter) {
        w.headers.date = Some(time::now_utc());
        w.headers.content_length = Some(14);
        w.headers.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")))
        });
        w.headers.server = Some(StrBuf::from_str("Example"));

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