import { AddressInfo } from "net";
import { Server } from "http";
import { Server as SecureServer } from "https";
export interface IListenOptions {
    server: Server | SecureServer;
    port: number;
    hostname: string;
}
/**
 * Utility class for handling common tasks for NodeJS HTTP/S server objects.
 */
export declare class Servers {
    /**
     * Returns with a promise that resolves when the server has been shut down. Rejects if anything goes wrong of if the
     * parameters are invalid.
     *
     * @param server The server object that will be shut down.
     */
    static shutdown(server: Server | SecureServer): Promise<void>;
    static listen(options: IListenOptions): Promise<AddressInfo>;
    /**
     * Start an HTTP server on the preferred port provided in the parameter if
     * possible, bind to a random (0) port otherwise.
     *
     * @param preferredPort The TCP port the caller would **prefer** to use if
     * possible. If the preferred port is taken, it will bind the server to port
     * zero instead which means that the operating system will randomly choose an
     * available port and use that.
     */
    static startOnPreferredPort(preferredPort?: number, host?: string): Promise<Server>;
    static startOnPort(port: number, host?: string): Promise<Server>;
}