/** Functions for dealing with `Range` headers in requests.
 *
 * @module
 */
import * as dntShim from "./_dnt.shims.js";
import type { FileInfo } from "./etag.js";
/** A representation of range of bytes. */
export interface ByteRange {
    start: number;
    end: number;
}
/** Determine, by the value of an `If-Range` header, if a `Range` header should
 * be applied to a request, returning `true` if it should or otherwise
 * `false`. */
export declare function ifRange(value: string, mtime: number, entity: Uint8Array | FileInfo): Promise<boolean>;
/** Given a range header value and a current byte size of an asset, determine
 * what ranges of bytes are being requested. */
export declare function parseRange(value: string, size: number): ByteRange[];
/** A class that takes a file (either a Deno.FsFile or Uint8Array) and bytes
 * and streams the ranges as a multi-part encoded HTTP body.
 *
 * This is specifically used by the `.send()` functionality to fulfill range
 * requests it receives, and could be used by others when trying to deal with
 * range requests, but is generally a low level API that most users of oak
 * would not need to worry about. */
export declare class MultiPartStream extends ReadableStream<Uint8Array> {
    #private;
    constructor(file: (dntShim.Deno.Reader & dntShim.Deno.Seeker & dntShim.Deno.Closer) | Uint8Array, type: string, ranges: ByteRange[], size: number, boundary: string);
    /** The content length of the entire streamed body. */
    contentLength(): number;
}