/**
 * Raw request bodies and raw responses for the server adapters.
 *
 * The adapters parse JSON (and url-encoded forms) into `ctx.body`. Routes that
 * take uploads — `POST /v1/audio/transcriptions` takes `multipart/form-data`
 * the way OpenAI's API does — need the bytes instead, so for the content types
 * below every adapter hands the route the unparsed body as a `Buffer`, bounded
 * by `bodyParser.maxSize`. A route that must answer in a wire format other than
 * the adapters' `{ data, metadata }` envelope (an OpenAI-compatible route, a
 * plain-text response) returns a web `Response`, which every adapter sends as is.
 *
 * @module server/utils/rawBody
 */
/** `true` for a content type whose body the adapters pass through unparsed. */
export declare function isRawBodyContentType(contentType: unknown): boolean;
/** "10mb" / "512kb" / "1gb" / a byte count → bytes. Falls back to 10 MB. */
export declare function parseByteLimit(limit: string | number | undefined): number;
/** Thrown when a raw body grows past the adapter's `maxSize`. */
export declare class RawBodyTooLargeError extends Error {
    readonly status = 413;
    constructor(limit: number);
}
/** Read a Node request stream into one `Buffer`, refusing more than `maxBytes`. */
export declare function readRawBody(stream: AsyncIterable<Buffer | string>, maxBytes: number): Promise<Buffer>;
/** A web `Response` returned by a route handler. */
export declare function isWebResponse(value: unknown): value is Response;
/** Status, headers and body bytes of a web `Response`, for adapters that write to a Node response. */
export declare function readWebResponse(response: Response): Promise<{
    status: number;
    headers: Record<string, string>;
    body: Buffer;
}>;