std/streams/to_array_buffer.ts
123456789101112131415161718192021222324252627282930313233343536373839// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.import { concat } from "../bytes/concat.ts";/** * Converts a {@linkcode ReadableStream} of {@linkcode Uint8Array}s to an * {@linkcode ArrayBuffer}. Works the same as{@linkcode Response.arrayBuffer}. * * @example * ```ts * import { toArrayBuffer } from "https://deno.land/std@$STD_VERSION/streams/to_array_buffer.ts"; * * const stream = ReadableStream.from([ * new Uint8Array([1, 2]), * new Uint8Array([3, 4]), * ]); * await toArrayBuffer(stream); // ArrayBuffer { [Uint8Contents]: <01 02 03 04>, byteLength: 4 } * ``` */export async function toArrayBuffer( readableStream: ReadableStream<Uint8Array>,): Promise<ArrayBuffer> { const reader = readableStream.getReader(); const chunks: Uint8Array[] = []; while (true) { const { done, value } = await reader.read(); if (done) { break; } chunks.push(value); } return concat(chunks).buffer;}