Function handlerToMiddleware

packages/start-server-core/src/createStartHandler.ts:331–345

* Wrap a route handler as middleware

(
  handler: RouteMethodHandlerFn<any, AnyRoute, any, any, any, any, any>,
  mayDefer: boolean = false,
)

 * Wrap a route handler as middleware
 */
function handlerToMiddleware(
  handler: RouteMethodHandlerFn<any, AnyRoute, any, any, any, any, any>,
  mayDefer: boolean = false,
): TODO {
  if (mayDefer) {
    return handler
  }
  return async (ctx: TODO) => {
    const response = await handler({ ...ctx, next: throwIfMayNotDefer })
    if (!response) {
      throwRouteHandlerError()
    }
    return response
  }
}

/**
 * Creates the TanStack Start request handler.