import { IncomingMessage, ServerResponse } from './proxy-params';
import { ProxyRequest } from './proxy-request';
export type ResponseHandler = (proxyRes: IncomingMessage, req: ProxyRequest, res: ServerResponse) => Promise<boolean | undefined> | boolean | undefined;
export declare class HttpProxyMiddleware {
    static run(options: {
        targetPort: number;
        proxyPort: number;
        responseHandlers: ResponseHandler[];
    }): void;
}