import { Options } from './proxy';
import { UpstreamOptions } from './upstream';
import { Storage } from './storage';
export interface Context {
    hostname: string;
    request: Request;
    response: Response;
    options: Options;
    storage: Storage;
    upstream: UpstreamOptions | null;
}
export declare type Middleware = (context: Context, next: () => Promise<void | null> | void | null) => Promise<void | null> | void | null;
export interface Pipeline {
    push: (...middlewares: Middleware[]) => void | null;
    execute: (context: Context) => Promise<void | null>;
}