/// <reference types="node" />
import * as http from 'http';
import * as WebSocket from 'ws';
import * as net from 'net';
/**
 * Assume `wsServer` to be created with `noServer: true` option.
 * `httpHandler` can be accessed as `app.handler` in `express` or as `app.callback()` in `koa`.
 *
 * Create http server.
 * Handle 'request' events via `httpHandler`.
 * On 'upgrade' event call `wsServer.handleUpgrade` and emit 'connection' event from `wsServer`.
 */
export declare function createHttpWsServer(): {
    httpServer: http.Server;
    wsServer: WebSocket.Server;
};
/**
 * Register `reject` as 'error' events handler.
 * Try to `server.listen`.
 * If successfull then unregister `reject` as 'error' events handler and `resolve`.
 */
export declare function listen(server: http.Server, port: number): Promise<void>;
export declare function close(server: http.Server): Promise<void>;
export declare class HttpWsServer {
    protected port: number;
    httpServer: http.Server;
    wsServer: WebSocket.Server;
    protected sockets: Set<net.Socket>;
    constructor(port: number);
    listen(): Promise<void>;
    destroyAllSockets(): void;
    close({ force }?: {
        force?: boolean;
    }): Promise<void>;
}