/// <reference types="node" />
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import { BlockMapDataHolder, HttpExecutor } from "builder-util-runtime";
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import { BlockMap } from "builder-util-runtime/out/blockMapApi";
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import { OutgoingHttpHeaders, RequestOptions } from "http";
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import { ProgressInfo, CancellationToken } from "builder-util-runtime";
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import { Logger } from "../main";
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import { URL } from "url";
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export interface DifferentialDownloaderOptions {
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readonly oldFile: string;
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readonly newUrl: URL;
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readonly logger: Logger;
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readonly newFile: string;
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readonly requestHeaders: OutgoingHttpHeaders | null;
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readonly isUseMultipleRangeRequest?: boolean;
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readonly cancellationToken: CancellationToken;
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onProgress?: (progress: ProgressInfo) => void;
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}
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export declare abstract class DifferentialDownloader {
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protected readonly blockAwareFileInfo: BlockMapDataHolder;
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readonly httpExecutor: HttpExecutor<any>;
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readonly options: DifferentialDownloaderOptions;
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fileMetadataBuffer: Buffer | null;
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private readonly logger;
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constructor(blockAwareFileInfo: BlockMapDataHolder, httpExecutor: HttpExecutor<any>, options: DifferentialDownloaderOptions);
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createRequestOptions(): RequestOptions;
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protected doDownload(oldBlockMap: BlockMap, newBlockMap: BlockMap): Promise<any>;
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private downloadFile;
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private doDownloadFile;
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protected readRemoteBytes(start: number, endInclusive: number): Promise<Buffer>;
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private request;
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}
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