import { Application } from 'express';
export declare function getIp(): string;
/** 获取公网ip地址 */
export declare function getPublicIPAddress(): Promise<string>;
export declare function corsMiddleware(app: Application): void;
export declare function getPort(basePort?: number): Promise<number>;
/**
 * @param {object} content
 * @returns the size of the content
 */
export declare function getByteSize(content: string): number;