req_rack_upgrade(agooReq r) {
    switch (r->upgrade) {
    case AGOO_UP_WS:	return websocket_sym;
    case AGOO_UP_SSE:	return sse_sym;
    default:		return Qnil;
    }
}
req_rack_upgrade(agooReq r) {
    switch (r->upgrade) {
    case AGOO_UP_WS:	return websocket_sym;
    case AGOO_UP_SSE:	return sse_sym;
    default:		return Qnil;
    }
}