export type Stats = import("fs").Stats;
export type ReadStream = import("fs").ReadStream;
export type FunctionReturning<T> = (...args: EXPECTED_ANY) => T;
export type ExpectedIncomingMessage = {
  /**
   * get header extra method
   */
  getHeader?: ((name: string) => string | string[] | undefined) | undefined;
  /**
   * get method extra method
   */
  getMethod?: (() => string | undefined) | undefined;
  /**
   * get URL extra method
   */
  getURL?: (() => string | undefined) | undefined;
  /**
   * an extra option for `fastify` (and `@fastify/express`) to get original URL
   */
  originalUrl?: string | undefined;
  /**
   * an extra option for `fastify` (and `@fastify/express`) to get ID of request
   */
  id?: string | undefined;
};
export type ExpectedServerResponse = {
  /**
   * set status code
   */
  setStatusCode?: ((status: number) => void) | undefined;
  /**
   * get status code
   */
  getStatusCode?: (() => number) | undefined;
  /**
   * get header
   */
  getHeader: (name: string) => string | string[] | undefined | number;
  /**
   * set header
   */
  setHeader?:
    | ((
        name: string,
        value: number | string | Readonly<string[]>,
      ) => ExpectedServerResponse)
    | undefined;
  /**
   * remove header
   */
  removeHeader?: ((name: string) => void) | undefined;
  /**
   * send
   */
  send?: ((data: string | Buffer) => void) | undefined;
  /**
   * finish
   */
  finish?: ((data?: string | Buffer) => void) | undefined;
  /**
   * get response header
   */
  getResponseHeaders?: (() => string[]) | undefined;
  /**
   * get headers sent
   */
  getHeadersSent?: (() => boolean) | undefined;
  /**
   * stream
   */
  stream?: ((data: EXPECTED_ANY) => void) | undefined;
  /**
   * get outgoing
   */
  getOutgoing?: (() => EXPECTED_ANY) | undefined;
  /**
   * set state
   */
  setState?: ((name: string, value: EXPECTED_ANY) => void) | undefined;
};
export type IncomingMessage = import("./index").IncomingMessage;
export type ServerResponse = import("./index").ServerResponse;
export type OutputFileSystem = import("./index").OutputFileSystem;
export type EXPECTED_ANY = import("./index").EXPECTED_ANY;
/**
 * @param {string} filename filename
 * @param {OutputFileSystem} outputFileSystem output file system
 * @param {number} start start
 * @param {number} end end
 * @returns {{ bufferOrStream: (Buffer | import("fs").ReadStream), byteLength: number }} result with buffer or stream and byte length
 */
export function createReadStreamOrReadFile(
  filename: string,
  outputFileSystem: OutputFileSystem,
  start: number,
  end: number,
): {
  bufferOrStream: Buffer | import("fs").ReadStream;
  byteLength: number;
};
/**
 * @param {import("fs").ReadStream} stream stream
 * @param {boolean} suppress do need suppress?
 * @returns {void}
 */
export function destroyStream(
  stream: import("fs").ReadStream,
  suppress: boolean,
): void;
/**
 * @param {string} string raw HTML
 * @returns {string} escaped HTML
 */
export function escapeHtml(string: string): string;
/**
 * Create a simple ETag.
 * @param {Buffer | ReadStream | Stats} entity entity
 * @returns {Promise<{ hash: string, buffer?: Buffer }>} etag
 */
export function etag(entity: Buffer | ReadStream | Stats): Promise<{
  hash: string;
  buffer?: Buffer;
}>;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @param {(string | Buffer)=} data data
 */
export function finish<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response, data?: (string | Buffer) | undefined): void;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @returns {boolean} true when headers were sent, otherwise false
 */
export function getHeadersSent<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response): boolean;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @returns {Response} res res
 */
export function getOutgoing<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response): Response;
/**
 * @typedef {object} ExpectedIncomingMessage
 * @property {((name: string) => string | string[] | undefined)=} getHeader get header extra method
 * @property {(() => string | undefined)=} getMethod get method extra method
 * @property {(() => string | undefined)=} getURL get URL extra method
 * @property {string=} originalUrl an extra option for `fastify` (and `@fastify/express`) to get original URL
 * @property {string=} id an extra option for `fastify` (and `@fastify/express`) to get ID of request
 */
/**
 * @typedef {object} ExpectedServerResponse
 * @property {((status: number) => void)=} setStatusCode set status code
 * @property {(() => number)=} getStatusCode get status code
 * @property {((name: string) => string | string[] | undefined | number)} getHeader get header
 * @property {((name: string, value: number | string | Readonly<string[]>) => ExpectedServerResponse)=} setHeader set header
 * @property {((name: string) => void)=} removeHeader remove header
 * @property {((data: string | Buffer) => void)=} send send
 * @property {((data?: string | Buffer) => void)=} finish finish
 * @property {(() => string[])=} getResponseHeaders get response header
 * @property {(() => boolean)=} getHeadersSent get headers sent
 * @property {((data: EXPECTED_ANY) => void)=} stream stream
 * @property {(() => EXPECTED_ANY)=} getOutgoing get outgoing
 * @property {((name: string, value: EXPECTED_ANY) => void)=} setState set state
 */
/**
 * @template {IncomingMessage & ExpectedIncomingMessage} Request
 * @param {Request} req req
 * @param {string} name name
 * @returns {string | string[] | undefined} request header
 */
export function getRequestHeader<
  Request extends IncomingMessage & ExpectedIncomingMessage,
>(req: Request, name: string): string | string[] | undefined;
/**
 * @template {IncomingMessage & ExpectedIncomingMessage} Request
 * @param {Request} req req
 * @returns {string | undefined} request method
 */
export function getRequestMethod<
  Request extends IncomingMessage & ExpectedIncomingMessage,
>(req: Request): string | undefined;
/**
 * @template {IncomingMessage & ExpectedIncomingMessage} Request
 * @param {Request} req req
 * @returns {string | undefined} request URL
 */
export function getRequestURL<
  Request extends IncomingMessage & ExpectedIncomingMessage,
>(req: Request): string | undefined;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @param {string} name name
 * @returns {string | string[] | undefined | number} header
 */
export function getResponseHeader<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response, name: string): string | string[] | undefined | number;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @returns {string[]} header names
 */
export function getResponseHeaders<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response): string[];
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @returns {number} status code
 */
export function getStatusCode<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response): number;
/**
 * @param {"bytes"} type type
 * @param {number} size size
 * @param {import("range-parser").Range=} range range
 * @returns {string} value of content range header
 */
export function getValueContentRangeHeader(
  type: "bytes",
  size: number,
  range?: import("range-parser").Range | undefined,
): string;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 */
export function initState<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response): void;
/**
 * @template T
 * @typedef {(...args: EXPECTED_ANY) => T} FunctionReturning
 */
/**
 * @template T
 * @param {FunctionReturning<T>} fn memorized function
 * @param {({ cache?: Map<string, { data: T }> } | undefined)=} cache cache
 * @param {((value: T) => T)=} callback callback
 * @returns {FunctionReturning<T>} new function
 */
export function memorize<T>(
  fn: FunctionReturning<T>,
  {
    cache,
  }?:
    | (
        | {
            cache?: Map<
              string,
              {
                data: T;
              }
            >;
          }
        | undefined
      )
    | undefined,
  callback?: ((value: T) => T) | undefined,
): FunctionReturning<T>;
/** @typedef {import("fs").Stats} Stats */
/** @typedef {import("fs").ReadStream} ReadStream */
/**
 * Parse an HTTP Date into a number.
 * @param {string} date date
 * @returns {number} timestamp
 */
export function parseHttpDate(date: string): number;
/**
 * Parse a HTTP token list.
 * @param {string} str str
 * @returns {string[]} tokens
 */
export function parseTokenList(str: string): string[];
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @param {import("fs").ReadStream} bufferOrStream buffer or stream
 */
export function pipe<Response extends ServerResponse & ExpectedServerResponse>(
  res: Response,
  bufferOrStream: import("fs").ReadStream,
): void;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @param {string} name name
 * @returns {void}
 */
export function removeResponseHeader<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response, name: string): void;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @param {string | Buffer} bufferOrString buffer or string
 * @returns {void}
 */
export function send<Response extends ServerResponse & ExpectedServerResponse>(
  res: Response,
  bufferOrString: string | Buffer,
): void;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @param {string} name name
 * @param {number | string | Readonly<string[]>} value value
 * @returns {Response} response
 */
export function setResponseHeader<
  Response extends ServerResponse & ExpectedServerResponse,
>(
  res: Response,
  name: string,
  value: number | string | Readonly<string[]>,
): Response;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @param {string} name name
 * @param {EXPECTED_ANY} value state
 * @returns {void}
 */
export function setState<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response, name: string, value: EXPECTED_ANY): void;
/**
 * @template {ServerResponse & ExpectedServerResponse} Response
 * @param {Response} res res
 * @param {number} code code
 * @returns {void}
 */
export function setStatusCode<
  Response extends ServerResponse & ExpectedServerResponse,
>(res: Response, code: number): void;