/// <reference types="node" />
import type { IObjectStorage } from './objectStorage';
import type { ObjectData, ObjectItem, AliOSSConfig, ObjectMetadata } from '../../types';
export declare class OSSStorage implements IObjectStorage {
    private config?;
    private ossClient;
    private tokenExpiration;
    constructor(config?: AliOSSConfig | undefined);
    private buildOSSClient;
    private isTokenExpiration;
    private getClient;
    append(objectName: string, content: string): Promise<any>;
    getObjectToBuffer(objectName: string): Promise<Buffer>;
    getObjectToStream(objectName: string): Promise<any>;
    getObjectToString(objectName: string): Promise<string>;
    getObjectToJSON(objectName: string): Promise<any>;
    putObject(objectName: string, data: ObjectData, metaData?: ObjectMetadata): Promise<void>;
    fPutObject(objectName: string, filePath: string, metaData?: ObjectMetadata): Promise<void>;
    fGetObject(objectName: string, filePath: string): Promise<void>;
    presignedGetObject(objectName: string): Promise<string>;
    presignedPutObject(objectName: string): Promise<string>;
    listObjects(prefix: string, recursive?: boolean, maxKeys?: number): Promise<ObjectItem[]>;
    deleteObject(objectName: string): Promise<void>;
    deleteMultiObjects(objectNames: string[]): Promise<void>;
    checkObjectNameExist(objectName: string): Promise<boolean>;
    getLastModified(objectName: string): Promise<Date>;
}