88 lines
2.9 KiB
TypeScript
88 lines
2.9 KiB
TypeScript
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import { CHUNKS_COMBINED_FOR_A_UPLOAD_PART, DataStream, MultipartUploadURLs, RANDOM_PERCENTAGE_PROGRESS_FOR_PUT } from './uploadService';
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import NetworkClient from './networkClient';
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import * as convert from 'xml-js';
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interface PartEtag{
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PartNumber:number;
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Etag:string;
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}
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export function calculatePartCount(encryptedChunkCount: number) {
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const partCount = Math.ceil(
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encryptedChunkCount / CHUNKS_COMBINED_FOR_A_UPLOAD_PART,
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);
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return partCount;
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}
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export async function uploadStreamUsingMultipart(filename:string, encryptedData:DataStream, progressTracker) {
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const { chunkCount, stream } = encryptedData;
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const uploadPartCount = calculatePartCount(chunkCount);
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const filePartUploadURLs = await NetworkClient.fetchMultipartUploadURLs(
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uploadPartCount,
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);
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const fileObjectKey = await uploadStreamInParts(
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filePartUploadURLs,
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stream,
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filename,
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uploadPartCount,
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progressTracker,
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);
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return fileObjectKey;
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}
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export async function uploadStreamInParts(
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multipartUploadURLs: MultipartUploadURLs,
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file: ReadableStream<Uint8Array>,
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filename: string,
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uploadPartCount: number,
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progressTracker,
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) {
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const encryptedFileStreamReader = file.getReader();
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const percentPerPart = getRandomProgressPerPartUpload(uploadPartCount);
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const partEtags:PartEtag[] = [];
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for (const [
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index,
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fileUploadURL,
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] of multipartUploadURLs.partURLs.entries()) {
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const uploadChunk = await combineChunksToFormUploadPart(encryptedFileStreamReader);
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const eTag= await NetworkClient.putFilePart(fileUploadURL, uploadChunk, progressTracker.bind(null, filename, percentPerPart, index));
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partEtags.push({ PartNumber: index+1, Etag: eTag });
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}
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await completeMultipartUpload(partEtags, multipartUploadURLs.completeURL);
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return multipartUploadURLs.objectKey;
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}
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export function getRandomProgressPerPartUpload(uploadPartCount:number) {
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const percentPerPart = Math.round(
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RANDOM_PERCENTAGE_PROGRESS_FOR_PUT() / uploadPartCount,
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);
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return percentPerPart;
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}
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export async function combineChunksToFormUploadPart(dataStreamReader:ReadableStreamDefaultReader<Uint8Array>) {
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const combinedChunks = [];
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for (let i = 0; i < CHUNKS_COMBINED_FOR_A_UPLOAD_PART; i++) {
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const { done, value: chunk } =
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await dataStreamReader.read();
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if (done) {
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break;
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}
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for (let index = 0; index < chunk.length; index++) {
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combinedChunks.push(chunk[index]);
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}
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}
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return Uint8Array.from(combinedChunks);
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}
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async function completeMultipartUpload(partEtags:PartEtag[], completeURL:string) {
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const options = { compact: true, ignoreComment: true, spaces: 4 };
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const body = convert.js2xml(
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{ CompleteMultipartUpload: { Part: partEtags } },
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options,
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);
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await NetworkClient.completeMultipartUpload(completeURL, body);
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}
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