/// <reference types="node" />
import { Request } from 'express';
export declare class ReqHelper {
    /**
     * 将 req 中的流转储到临时目录中
     * @param req
     * @param filename
     */
    static saveFileByReq(req: Request, filename: string): Promise<string>;
    static saveFile(fileStream: NodeJS.ReadableStream, filename: string): Promise<string>;
}