import {FetchHttpHandler, FetchHttpHandlerOptions} from '@aws-sdk/fetch-http-handler';
import {HttpHandlerOptions} from '@aws-sdk/types';
import {HttpResponse, HttpRequest} from '@aws-sdk/protocol-http';
import {Subject} from 'rxjs';

/**
 * 自定义aws sdk s3client的HttpHandler。代码hack自aws-sdk的FetchHttpHandler
 *
 * @author biming
 */
export declare class S3ClientHttpRequestHandler extends FetchHttpHandler {
    onProgress$: Subject<{
        path: string;
        progressEvent: ProgressEvent;
    }>;
    private xmlHttpRequest;
    private myRequestTimeout;

    constructor(xmlHttpRequest: XMLHttpRequest, {requestTimeout}?: FetchHttpHandlerOptions);

    handle(request: HttpRequest, {abortSignal}?: HttpHandlerOptions): Promise<{
        response: HttpResponse;
    }>;

    /**
     * handles a request by XHR instead of fetch
     * this is a copy the `handle` method of the `FetchHttpHandler` class of @aws-sdk/fetch-http-handler
     * replacing the `Fetch`part with XHR
     */
    private handleByXhr;
    private requestTimeoutFn;
}