import { CancellablePromise } from './Task';
export declare type RequestMethod = 'delete' | 'DELETE' | 'get' | 'GET' | 'head' | 'HEAD' | 'options' | 'OPTIONS' | 'post' | 'POST' | 'put' | 'PUT';
export interface RequestOptions {
    data?: any;
    followRedirects?: boolean;
    handleAs?: 'text' | 'json';
    headers?: {
        [key: string]: string | number;
    };
    method?: RequestMethod;
    password?: string;
    query?: string | {
        [key: string]: any;
    };
    proxy?: string;
    user?: string;
    username?: string;
    onDownloadProgress?: (progressEvent: any) => void;
}
export interface ProgressEvent {
    total: number;
    bytes: number;
    [index: string]: any;
}
export interface Headers {
    all: {
        [key: string]: string;
    };
    get(key: string): string;
}
export interface Response {
    headers: Headers;
    ok: boolean;
    status: number;
    statusText: string;
    arrayBuffer(): CancellablePromise<ArrayBuffer>;
    json<R = object>(): CancellablePromise<R>;
    text(): CancellablePromise<string>;
}
export default function request(url: string, options?: RequestOptions): CancellablePromise<Response>;