/**
 * Express Server Application.
 * - standalone http service with express.
 *
 *
 * ```bash
 * #run-server (use lemon.yml:local)
 * $ npm install -g nodemon
 * $ ENV=lemon STAGE=local nodemon express.js
 * ```
 *
 * [TODO]
 * - [ ] 190801 proper content type `text/plain`
 * - [x] 190801 change router underscore char like `loopers_front` -> `loopers-front`
 *
 *
 * @author      Steve Jung <steve@lemoncloud.io>
 * @date        2019-07-31 support ECMA 2016.
 * @date        2019-08-01a auto register api with pattern. `/^[a-z][a-z0-9\-_]+$/`
 * @date        2019-08-07 ignore `engine.dt` function.
 * @date        2019-11-26 cleanup and optimized for `lemon-core#v2`
 * @date        2020-01-23 improve context information via headers.
 *
 * @copyright (C) lemoncloud.io 2019 - All Rights Reserved.
 */
import { LemonEngine } from '../engine/';
import { LambdaWEBHandler } from '../cores/lambda/lambda-web-handler';
import express from 'express';
export declare const buildHeaderGetter: (headers: any) => (name: string) => string;
export declare const buildExpress: ($engine: LemonEngine, $web: LambdaWEBHandler, options?: {
    argv?: string[];
    prefix?: string;
    genRequestId?: () => string;
}) => {
    express: () => any;
    app: any;
    createServer: () => any;
};