import { Middleware } from './Middleware';
import { Request } from './Request';
import { Response } from './Response';
import { IRequestResponse } from './IRequestResponse';
/**
 * CORSMiddleware is used to enable CORS on APIs.
 * It will automatically add the necessary headers necessary to
 * communicate with CORS enabled clients.
 */
export declare class CORSMiddleware extends Middleware {
    private $allowedOrigin;
    private $allowedHeaders;
    private $allowedMethods;
    /**
     * @constructor
     * @param allowedOrigin     The allowed origin. By default it will use the request origin.
     * @param allowedHeaders    Array of allowed headers.
     * @param allowedMethods    Array of allowed HTTP methods.
     */
    constructor(allowedOrigin?: string, allowedHeaders?: string[], allowedMethods?: string[]);
    /**
     * Sets the allowed origin. By default,
     */
    getDefaultAllowedOrigin(): string;
    getDefaultAllowedHeaders(): string[];
    getDefaultAllowedMethods(): string[];
    protected _execute(request: Request, response: Response): Promise<IRequestResponse>;
}