events {
  downstream_send_event {
    h2_frames {
      settings {
      }
    }
    h2_frames {
    }
    h2_frames {
      request {
        stream_index: 1
        host: "host"
        path: "/path/to/long/url"
      }
    }
  }
}
events {
}
events {
  downstream_send_event {
    h2_frames {
      generic {
        frame_bytes: "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      }
    }
  }
}