How to get the raw request using a web handler?

// Convert the API to a web handler
const webHandler = HttpApiBuilder.toWebHandler(
    Layer.mergeAll(MyApiLive, SwaggerLayer, HttpServer.layerContext),
);

export default {
    async fetch(request: Request) {
        return webHandler.handler(request);
    },
};

.handle("ws", ({request}) => {
         Effect.gen(function* () {
      const req = yield* HttpServerRequest.HttpServerRequest
      const raw = NodeHttpServerRequest.toIncomingMessage(req)