/// <reference types="koa" />
import { GabResponse } from '@gabliam/web-core';
import { koa } from './koa';
export declare class KoaResponse implements GabResponse<koa.Response> {
    private context;
    private response;
    /**
     * Check if a header has been written to the socket.
     */
    readonly headersSent: boolean;
    /**
     * Get/Set response status code.
     */
    status: number;
    /**
     * Get/Set response status message
     */
    message: string;
    /**
     * Get/Set response body.
     */
    body: any;
    /**
     * Return the response mime type void of
     * parameters such as "charset".
     *
     * Set Content-Type response header with `type` through `mime.lookup()`
     * when it does not contain a charset.
     *
     * Examples:
     *
     *     this.type = '.html';
     *     this.type = 'html';
     *     this.type = 'json';
     *     this.type = 'application/json';
     *     this.type = 'png';
     */
    type: string;
    constructor(context: koa.Context, response: koa.Response);
    get originalResponse(): koa.Response;
    /**
     * Redirect to the given `url` with optional response `status`
     * defaulting to 302.
     *
     * The resulting `url` is determined by `res.location()`, so
     * it will play nicely with mounted apps, relative paths,
     * `"back"` etc.
     *
     * Examples:
     *
     *    res.redirect('/foo/bar');
     *    res.redirect('http://example.com');
     *    res.redirect('http://example.com', 301);
     *    res.redirect('../login'); // /blog/post/1 -> /blog/login
     */
    redirect(url: string, status?: number): void;
    /**
     * Transfer the file at the given `path`.
     *
     * Automatically sets the _Content-Type_ response header field.
     * The callback `fn(err)` is invoked when the transfer is complete
     * or when an error occurs. Be sure to check `res.sentHeader`
     * if you wish to attempt responding, as the header and some data
     * may have already been transferred.
     *
     * Options:
     *
     *   - `maxAge`   defaulting to 0 (can be string converted by `ms`)
     *   - `root`     root directory for relative filenames
     *   - `headers`  object of headers to serve with file
     *   - `dotfiles` serve dotfiles, defaulting to false; can be `"allow"` to send them
     *
     * Other options are passed along to `send`.
     *
     * Examples:
     *
     *  The following example illustrates how `res.sendFile()` may
     *  be used as an alternative for the `static()` middleware for
     *  dynamic situations. The code backing `res.sendFile()` is actually
     *  the same code, so HTTP cache support etc is identical.
     *
     *     app.get('/user/:uid/photos/:file', function(req, res){
     *       var uid = req.params.uid
     *         , file = req.params.file;
     *
     *       req.user.mayViewFilesFrom(uid, function(yes){
     *         if (yes) {
     *           res.sendFile('/uploads/' + uid + '/' + file);
     *         } else {
     *           res.send(403, 'Sorry! you cant see that.');
     *         }
     *       });
     *     });
     *
     * @api public
     */
    sendFile(path: string, options?: any): Promise<void>;
    /**
     * Append additional header `field` with value `val`.
     *
     * Examples:
     *
     * ```
     * this.append('Link', ['<http://localhost/>', '<http://localhost:3000/>']);
     * this.append('Set-Cookie', 'foo=bar; Path=/; HttpOnly');
     * this.append('Warning', '199 Miscellaneous warning');
     * ```
     */
    append(field: string, val: string | string[]): void;
    /**
     * Set Content-Disposition header to "attachment" with optional `filename`.
     */
    attachment(filename: string): void;
    /**
     * Set header `field` to `val`, or pass
     * an object of header fields.
     *
     * Examples:
     *
     *    this.set('Foo', ['bar', 'baz']);
     *    this.set('Accept', 'application/json');
     *    this.set({ Accept: 'text/plain', 'X-API-Key': 'tobi' });
     */
    set(field: {
        [key: string]: string;
    } | string, val?: string | string[]): void;
    /**
     * Vary on `field`.
     */
    vary(field: string): void;
}