/// <reference types="node" />
import { IncomingMessage, ServerResponse } from 'http';
import { RAW_REQUEST, RAW_RESPONSE } from './constants/http/symbol.js';
import { mimeExtMap } from './constants/mime.js';
import { TunCookie } from './TunCookie.js';
export declare class TunResponse {
    #private;
    [RAW_REQUEST]: IncomingMessage;
    [RAW_RESPONSE]: ServerResponse;
    cookies: TunCookie[];
    constructor(req: IncomingMessage, res: ServerResponse);
    get header(): import("http").OutgoingHttpHeaders;
    get headers(): import("http").OutgoingHttpHeaders;
    get socket(): import("net").Socket | null;
    get status(): number;
    set status(val: number);
    /**
     * Get response status message.
     * By default, it is associated with response.status.
     */
    get message(): string;
    set message(val: string);
    set length(val: number);
    /**
     * Return response Content-Length as a number when present,
     * or deduce from ctx.body when possible, or undefined.
     */
    get length(): number;
    get body(): string | Buffer | import('stream').Stream | Object | Array<any> | null;
    set body(val: string | Buffer | import('stream').Stream | Object | Array<any> | null);
    /**
     * Get a response header field value with case-insensitive field.
     *
     * e.g. const etag = ctx.response.get('ETag');
     */
    get(field: string): string | number | string[] | undefined;
    /**
     * Set response header field to value:
     *
     * e.g. `ctx.request.set('Cache-Control', 'no-cache');`
     * ```
     * ctx.request.set({
     *   'Etag': '1234',
     *   'Last-Modified': date
     * })
     * ```
     */
    set(field: string, value: string | number | string[]): void;
    /**
     * Append additional header field with value val.
     */
    append(field: string, value: string | number | string[]): void;
    /**
     * Remove header field.
     */
    remove(field: string): void;
    /**
     * Get request Content-Type void of parameters such as "charset".
     */
    get type(): {
        mineType?: keyof typeof mimeExtMap;
        suffixType?: string;
        rawType?: string;
    };
    set type(val: {
        mineType?: keyof typeof mimeExtMap;
        suffixType?: string;
        rawType?: string;
    });
    /**
     * Very similar to ctx.request.is().
     * Check whether the response type is one of the supplied types.
     * This is particularly useful for creating middleware that manipulate responses.
     */
    is(...types: string[]): string | false;
    /**
     * Perform a [302] redirect to url.
     *
     * The string "back" is special-cased to provide Referrer support,
     * when Referrer is not present alt or "/" is used.
     */
    redirect(url: string, alt: string): void;
    /**
     * 设置 响应的 附件下载 Content-Disposition 头，并设置相应 Content-Type 头
     *
     * refers:
     * https://github.com/jshttp/content-disposition
     * https://github.com/jshttp/content-disposition/blob/master/index.js
     */
    attachment(filename: string): void;
    get headerSent(): boolean;
    /**
     * Return '' if header not exists
     *
     * Set the Last-Modified header as an appropriate UTC string.
     * You can either set it as a Date or date string.
     */
    get lastModified(): Date | string;
    set lastModified(date: Date | string);
    /**
     * Set the ETag of a response including the wrapped "s.
     * Note that there is no corresponding response.etag getter.
     *
     * e.g. `crypto.createHash('md5').update(ctx.body).digest('hex')`
     */
    get etag(): string;
    set etag(val: string);
    /**
     * 对向CDN缓存服务等 响应 说明区分某个字段的值做两份缓存(gzip|identity)？
     *
     * refers: https://imququ.com/post/vary-header-in-http.html
     */
    vary(field: string): void;
    /**
     * Flush any set headers, and begin the body.
     */
    flushHeaders(): void;
}