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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>helper.js - Documentation</title>
<script src="scripts/prettify/prettify.js"></script>
<script src="scripts/prettify/lang-css.js"></script>
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link type="text/css" rel="stylesheet" href="styles/prettify.css">
<link type="text/css" rel="stylesheet" href="styles/jsdoc.css">
<script src="scripts/nav.js" defer></script>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<input type="checkbox" id="nav-trigger" class="nav-trigger" />
<label for="nav-trigger" class="navicon-button x">
<div class="navicon"></div>
</label>
<label for="nav-trigger" class="overlay"></label>
<nav class="wrap">
<input type="text" id="nav-search" placeholder="Search" />
<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="module-api-FormUrlEncoded.html">FormUrlEncoded</a><ul class='methods'><li data-type='method'><a href="module-api-FormUrlEncoded.html#set">set</a></li><li data-type='method'><a href="module-api-FormUrlEncoded.html#append">append</a></li><li data-type='method'><a href="module-api-FormUrlEncoded.html#delete">delete</a></li><li data-type='method'><a href="module-api-FormUrlEncoded.html#str">str</a></li><li data-type='method'><a href="module-api-FormUrlEncoded.html#url">url</a></li></ul></li><li><a href="module-api-TeraBoxApp.html">TeraBoxApp</a><ul class='methods'><li data-type='method'><a href="module-api-TeraBoxApp.html#updateAppData">updateAppData</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#setVipDefaults">setVipDefaults</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#doReq">doReq</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getSysCfg">getSysCfg</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#checkLogin">checkLogin</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#passportPreLogin">passportPreLogin</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#passportLogin">passportLogin</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#regSendCode">regSendCode</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#regVerify">regVerify</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#regFinish">regFinish</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#passportGetInfo">passportGetInfo</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#userMembership">userMembership</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getCurrentUserInfo">getCurrentUserInfo</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getUserInfo">getUserInfo</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getQuota">getQuota</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getCoinsCount">getCoinsCount</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getRemoteDir">getRemoteDir</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getCategoryList">getCategoryList</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getRecycleBin">getRecycleBin</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#clearRecycleBin">clearRecycleBin</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#precreateFile">precreateFile</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#rapidUpload">rapidUpload</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#remoteUpload">remoteUpload</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getUploadHost">getUploadHost</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#uploadChunk">uploadChunk</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#createDir">createDir</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#createFile">createFile</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#filemanager">filemanager</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#shareList">shareList</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#shareSet">shareSet</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#shareCancel">shareCancel</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#shortUrlInfo">shortUrlInfo</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#shortUrlList">shortUrlList</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#fileDiff">fileDiff</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#genPanToken">genPanToken</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getHomeInfo">getHomeInfo</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#download">download</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getStream">getStream</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getFileMeta">getFileMeta</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getRecentUploads">getRecentUploads</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#querySurlTransfer">querySurlTransfer</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#shareTransfer">shareTransfer</a></li><li data-type='method'><a href="module-api-TeraBoxApp.html#getPublicKey">getPublicKey</a></li></ul></li></ul><h3>Modules</h3><ul><li><a href="module-api.html">api</a><ul class='methods'><li data-type='method'><a href="module-api.html#~signDownload">signDownload</a></li><li data-type='method'><a href="module-api.html#~checkMd5val">checkMd5val</a></li><li data-type='method'><a href="module-api.html#~checkMd5arr">checkMd5arr</a></li><li data-type='method'><a href="module-api.html#~decodeMd5">decodeMd5</a></li><li data-type='method'><a href="module-api.html#~changeBase64Type">changeBase64Type</a></li><li data-type='method'><a href="module-api.html#~decryptAES">decryptAES</a></li><li data-type='method'><a href="module-api.html#~encryptRSA">encryptRSA</a></li><li data-type='method'><a href="module-api.html#~prandGen">prandGen</a></li></ul></li><li><a href="module-helper.html">helper</a><ul class='methods'><li data-type='method'><a href="module-helper.html#~getChunkSize">getChunkSize</a></li><li data-type='method'><a href="module-helper.html#~hashFile">hashFile</a></li><li data-type='method'><a href="module-helper.html#~uploadChunks">uploadChunks</a></li><li data-type='method'><a href="module-helper.html#~unwrapErrorMessage">unwrapErrorMessage</a></li></ul></li></ul><h3>Global</h3><ul><li><a href="global.html#TeraBoxAppParams">TeraBoxAppParams</a></li><li><a href="global.html#TeraBoxAppParamsApp">TeraBoxAppParamsApp</a></li><li><a href="global.html#CheckLoginResponse">CheckLoginResponse</a></li></ul>
</nav>
<div id="main">
<h1 class="page-title">helper.js</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>import fs from 'node:fs';
import crypto from 'node:crypto';
import readline from 'node:readline';
import crc32 from 'crc-32';
import { filesize } from 'filesize';
/**
* Utility helper functions for TeraBox API requests
* @module helper
*/
/**
* Calculate proper chunk size for upload process
* @param {integer} fileSize - File size in bytes
* @param {Boolean} is_vip - VIP user flag
* @returns {integer} Calculated chunk size
*/
function getChunkSize(fileSize, is_vip = true) {
const MiB = 1024 * 1024;
const GiB = 1024 * MiB;
const limitSizes = [4, 8, 16, 32, 64, 128];
if(!is_vip){
return limitSizes.at(0) * MiB;
}
for (const limit of limitSizes) {
if (fileSize <= limit * GiB) {
return limit * MiB;
}
}
return limitSizes.at(-1) * MiB;
}
/**
* Calculate hashes for specific local file
* @param {string} filePath - Path to local file
* @returns {Object} Calculated hashes for specific local file
*/
async function hashFile(filePath) {
const stat = fs.statSync(filePath);
const sliceSize = 256 * 1024;
const splitSize = getChunkSize(stat.size);
const hashedData = newProgressData();
let crcHash = 0;
const fileHash = crypto.createHash('md5');
const sliceHash = crypto.createHash('md5');
let chunkHash = crypto.createHash('md5');
const hashData = {
crc32: 0,
slice: '',
file: '',
etag: '',
chunks: []
};
let bytesRead = 0;
let allBytesRead = 0;
const stream = fs.createReadStream(filePath);
try {
for await (const data of stream) {
fileHash.update(data);
crcHash = crc32.buf(data, crcHash);
let offset = 0;
while (offset < data.length) {
const remaining = data.length - offset;
const sliceRemaining = sliceSize - allBytesRead;
const chunkRemaining = splitSize - bytesRead;
const sliceAllowed = allBytesRead < sliceSize;
const readLimit = sliceAllowed
? Math.min(remaining, chunkRemaining, sliceRemaining)
: Math.min(remaining, chunkRemaining);
const chunk = data.subarray(offset, offset + readLimit);
chunkHash.update(chunk);
if (sliceAllowed) {
sliceHash.update(chunk);
}
offset += readLimit;
allBytesRead += readLimit;
bytesRead += readLimit;
if (bytesRead >= splitSize) {
hashData.chunks.push(chunkHash.digest('hex'));
chunkHash = crypto.createHash('md5');
bytesRead = 0;
}
}
hashedData.all = hashedData.parts[0] = allBytesRead;
printProgressLog('Hashing', hashedData, stat.size);
}
if (bytesRead > 0) {
hashData.chunks.push(chunkHash.digest('hex'));
}
hashData.crc32 = crcHash >>> 0;
hashData.slice = sliceHash.digest('hex');
hashData.file = fileHash.digest('hex');
hashData.etag = hashData.file;
if(hashData.chunks.length > 1){
const chunksJSON = JSON.stringify(hashData.chunks);
const chunksEtag = crypto.createHash('md5').update(chunksJSON).digest('hex');
hashData.etag = `${chunksEtag}-${hashData.chunks.length}`;
}
console.log();
return hashData;
}
catch (error) {
console.log();
throw error;
}
}
async function runWithConcurrencyLimit(data, tasks, limit) {
let index = 0;
let failed = false;
const runTask = async () => {
while (index < tasks.length && !failed) {
const currentIndex = index++;
await tasks[currentIndex]();
}
};
const workers = Array.from({ length: limit }, () => runTask());
try{
await Promise.all(workers);
}
catch(error){
console.error('\n[ERROR]', unwrapErrorMessage(error));
failed = true;
}
return {ok: !failed, data: data};
};
function printProgressLog(prepText, sentData, fsize){
readline.cursorTo(process.stdout, 0, null);
const uploadedBytesSum = Object.values(sentData.parts).reduce((acc, value) => acc + value, 0);
const uploadedBytesStr = filesize(uploadedBytesSum, {standard: 'iec', round: 3, pad: true, separator: '.'});
const filesizeBytesStr = filesize(fsize, {standard: 'iec', round: 3, pad: true});
const uploadedBytesFStr = `(${uploadedBytesStr}/${filesizeBytesStr})`;
const uploadSpeed = sentData.all * 1000 / (Date.now() - sentData.start) || 0;
const uploadSpeedStr = filesize(uploadSpeed, {standard: 'si', round: 2, pad: true, separator: '.'}) + '/s';
const remainingTimeInt = Math.max((fsize - uploadedBytesSum) / uploadSpeed, 0);
const remainingTimeSec = remainingTimeInt > 99*3636+35 ? 99*3636+35 : remainingTimeInt;
const remainingSeconds = Math.floor(remainingTimeSec % 60);
const remainingMinutes = Math.floor((remainingTimeSec % 3600) / 60);
const remainingHours = Math.floor(remainingTimeSec / 3600);
const [remH, remM, remS] = [remainingHours, remainingMinutes, remainingSeconds].map(t => String(t).padStart(2, '0'));
const remainingTimeStr = `${remH}h${remM}m${remS}s left...`;
const percentage = Math.floor((uploadedBytesSum / fsize) * 100);
const percentageFStr = `${percentage}% ${uploadedBytesFStr}`;
const uploadStatusArr = [percentageFStr, uploadSpeedStr, remainingTimeStr];
process.stdout.write(`${prepText}: ${uploadStatusArr.join(', ')}`);
readline.clearLine(process.stdout, 1);
}
function md5MismatchText(hash1, hash2, partnum, total){
return [
`MD5 hash mismatch for file (part: ${partnum} of ${total})`,
`[Actual MD5:${hash1} / Got MD5:${hash2}]`,
];
}
async function uploadChunkTask(app, data, file, partSeq, uploadData, externalAbort) {
const splitSize = getChunkSize(data.size);
const start = partSeq * splitSize;
const end = Math.min(start + splitSize, data.size) - 1;
const maxTries = uploadData.maxTries;
const uploadLog = (chunkSize) => {
uploadData.all += chunkSize;
uploadData.parts[partSeq] += chunkSize;
printProgressLog('Uploading', uploadData, data.size);
};
const blob_size = end + 1 - start;
const buffer = Buffer.alloc(blob_size);
await file.read(buffer, 0, blob_size, start);
const blob = new Blob([buffer], { type: 'application/octet-stream' });
let is_ok = false;
for (let i = 0; i < maxTries; i++) {
if (externalAbort.aborted) {
break;
}
try{
const res = await app.uploadChunk(data, partSeq, blob, null, externalAbort);
const chunkMd5 = data.hash.chunks[partSeq];
// check if we have chunks hash
if (app.CheckMd5Val(chunkMd5) && res.md5 !== chunkMd5){
const md5Err = md5MismatchText(chunkMd5, res.md5, partSeq+1, data.hash.chunks.length);
throw new Error(md5Err.join('\n\t'));
}
// check if we don't have chunk hash and data.hash_check not set to false
const skipChunkHashCheck = typeof data.hash_check === 'boolean' && data.hash_check === false;
if(!app.CheckMd5Val(chunkMd5) && !skipChunkHashCheck){
const calcChunkMd5 = crypto.createHash('md5').update(buffer).digest('hex');
if(calcChunkMd5 !== res.md5){
const md5Err = md5MismatchText(calcChunkMd5, res.md5, partSeq+1, data.hash.chunks.length);
throw new Error(md5Err.join('\n\t'));
}
}
// update chunkMd5 to res.md5
if(app.CheckMd5Val(res.md5) && chunkMd5 !== res.md5){
data.hash.chunks[partSeq] = res.md5;
}
// log uploaded
data.uploaded[partSeq] = true;
uploadLog(blob_size);
is_ok = true;
break;
}
catch(error){
if (externalAbort.aborted) {
break;
}
readline.clearLine(process.stdout, 0);
readline.cursorTo(process.stdout, 0, null);
let message = error.message;
if(error.cause){
message += ' Cause';
if(error.cause.errno){
message += ' #' + error.cause.errno;
}
if(error.cause.code){
message += ' ' + error.cause.code;
}
}
const uplFailedMsg1 = ' -> Upload failed for part #' + (partSeq+1);
const uplFailedMsg2 = `: ${message}`;
const doRetry = i+1 != maxTries ? `, retry #${i+1}` : '';
process.stdout.write(uplFailedMsg1 + uplFailedMsg2 + doRetry + '...\n');
uploadLog(0);
}
}
if(!is_ok){
throw new Error(`Upload failed! [PART #${partSeq+1}]`);
}
}
function newProgressData() {
return {
all: 0,
start: Date.now(),
parts: {},
};
}
/**
* Helper function for uploading chunks to TeraBox
* @param {TeraBoxApp} app - File size in bytes
* @param {Object} data - Upload data parameters
* @param {integer} maxTasks - maximum task for uploading
* @param {integer} maxTries - maximum tries for chunk uploading
* @returns {Object} Upload data parameters and status
*/
async function uploadChunks(app, data, filePath, maxTasks = 10, maxTries = 5) {
const splitSize = getChunkSize(data.size);
const totalChunks = data.hash.chunks.length;
const lastChunkSize = data.size - splitSize * (data.hash.chunks.length - 1);
const tasks = [];
const uploadData = newProgressData();
const externalAbortController = new AbortController();
uploadData.maxTries = maxTries;
if(data.uploaded.filter(pStatus => pStatus == false).length > 0){
for (let partSeq = 0; partSeq < totalChunks; partSeq++) {
uploadData.parts[partSeq] = 0;
if(data.uploaded[partSeq]){
const chunkSize = partSeq < totalChunks - 1 ? splitSize : lastChunkSize;
uploadData.parts[partSeq] = chunkSize;
}
}
const file = await fs.promises.open(filePath, 'r');
for (let partSeq = 0; partSeq < totalChunks; partSeq++) {
if(!data.uploaded[partSeq]){
tasks.push(() => {
return uploadChunkTask(app, data, file, partSeq, uploadData, externalAbortController.signal);
});
}
}
printProgressLog('Uploading', uploadData, data.size);
const cMaxTasks = totalChunks > maxTasks ? maxTasks : totalChunks;
const upload_status = await runWithConcurrencyLimit(data, tasks, cMaxTasks);
console.log();
externalAbortController.abort();
await file.close();
return upload_status;
}
return {ok: true, data};
}
/**
* Helper function unwraping Error Message
* @param {Object} err - Error object
* @returns {Object} Error data
*/
function unwrapErrorMessage(err) {
if (!err) {
return;
}
let e = err;
let res = err.message;
while (e.cause) {
e = e.cause;
if (e.message) {
res += ': ' + e.message;
}
}
return res;
}
export {
getChunkSize,
hashFile,
uploadChunks,
unwrapErrorMessage,
};
</code></pre>
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