import type { EggContextHttpClient, HttpClientResponse } from 'egg';
export interface DownloadToTempfileOptionalConfig {
    retries?: number;
    ignoreDownloadStatuses?: number[];
    remoteAuthToken?: string;
}
export declare function createTempDir(dataDir: string, dirname?: string): Promise<string>;
export declare function createTempfile(dataDir: string, filename: string): Promise<string>;
export declare function downloadToTempfile(httpclient: EggContextHttpClient, dataDir: string, url: string, optionalConfig?: DownloadToTempfileOptionalConfig): Promise<Tempfile>;
export interface Tempfile {
    tmpfile: string;
    headers: HttpClientResponse['res']['headers'];
    timing: HttpClientResponse['res']['timing'];
}
export declare function ensureContentType(contentType: string): string;
export declare function mimeLookup(filepath: string): string;