Million Versus Online - Asset Downloader

!mvo-downloader.js

// Requires NPM package 'node-fetch'.
// npm install node-fetch@2
const fetch = require('node-fetch');
const fs = require('fs');
const http = require('http');
const util = require('util');
const pipeline = util.promisify(require('stream').pipeline);

// Import file list.
let filesGot = 0;
let filesTotal = 0;
const filesList = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 51, 52, 53, 54, 60, 61, 62, 63, 64, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 152, 153, 157, 159, 162, 163, 175, 176, 179, 180, 181, 182, 183, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199];

// Game server information.
const serverHost = 'http://m-versus.com/';
const serverUrl = `${serverHost}version/android/`;

http.createServer().listen(3000, '127.0.0.1', async () => {
  console.log(`[Million Versus Online - Assets Downloader]\n`);
  await getResources();
  //await getWebsite();
  console.log(`[DONE] ${filesGot}/${filesTotal} files.`);
  process.exit(0); // Terminate server process.
});

const getResources = async () => {
  console.log(`[RESOURCES]`);
  filesTotal += filesList.length;
  const pathResources = createPath('jp.co.ateam.mva/files');
  for (let [i, z] of filesList.entries()) {
    const zoneVersion = await fetch(`${serverUrl}get_zone_version.php?z=${z}`, { method: 'GET' });
    const $zoneVersion = hexNum(strHex((await zoneVersion.buffer()).toString('latin1')).slice(0, 8));
    if ($zoneVersion) {
      const fileName = `zone${z}`;
      const fileUrl = `${serverUrl}get_data.php?mode=zone&version=${$zoneVersion}&z=${z}`;
      console.log(`[${i + 1}/${filesList.length}] ${fileName}`);
      if (await fileDownload(fileName, fileUrl, pathResources)) { filesGot++; }; }
  } console.log();
}

const getWebsite = async () => {
  console.log(`[WEBSITE]`);
  filesTotal += 980;
  const pathWebsite = createPath('m-versus.com/bull/character_make/image_gif');
  const charSex = ['01', '02'];
  const charColor = ['00', '01', '02', '03', '04', '05', '06'];
  const charHair = ['00', '01', '02', '03', '04', '05', '06'];
  const charHColor = ['00', '01', '02', '03', '04', '05', '06', '07', '08', '09'];
  for (let s of charSex) {
    for (let c of charColor) {
      for (let h of charHair) {
        for (let hc of charHColor) {
          const fileName = `${c}_${s}_${h}_${hc}.gif`;
          const fileUrl = `${serverHost}bull/character_make/image_gif/${fileName}`;
          if (await fileDownload(fileName, fileUrl, pathWebsite)) { filesGot++; };
  }}}} console.log();
}

const createPath = (output) => {
  // Create output path if it doesn't exist.
  const outputPath = `./${output}/`;
  if (!fs.existsSync(outputPath)) { fs.mkdirSync(outputPath, { recursive: true }); }
  return outputPath;
}

const fileDownload = async (name, url, output) => {
  try { // Download data from url.
    const fileData = await fetch(url, { method: 'GET' });
    // Write downloaded data into a new file stream.
    await pipeline(fileData.body, fs.createWriteStream(output + name));
    console.log(`[OK] >>${output.slice(1)}${name}`); return 1;
  } catch { // Failed to download file.
    console.log(`[ERROR] ${output.slice(1)}${name} (${url})`); return 0;
  }
}

// Return number representation of the given byte string.
const hexNum = (s) => {
  const n = s.match(/../g).reverse().join('');
  return parseInt(`0x${n}`, 16);
}

// Return byte representation of the given string.
const strHex = (s) => {
  return Array.from(s, b => b.charCodeAt(0).toString(16).padStart(2, '0')).join('').toUpperCase();
}