sadgod/source/getCurrentSWF.js

SadGod helps you extract data from ROTMG's internal SWF files. Currently it allows you to read the names and values of all binary packet ids used in the network communication. This is helpful because the game often changes the packet ids.

const cheerio = require('cheerio')
const SWFData = require('./SWFData')
const fetch = require('node-fetch')
const {join} = require('path')

const indexURL = "https://www.realmofthemadgod.com/"
const gameVersionRegex = /(?<=^AGCLoader)[0-9]+$/gi
const downloadFolder = join(__dirname, '..', 'downloads')
const extractionFolder = join(__dirname, '..', 'extracted')
const cacheFolder = join(__dirname, '..', 'cache')

const applicationStorage = require('./applicationStorage')
const swfAccessTime = 1000 * 60 * 60 * 2 // 2 Hours

async function getCurrentSWF() {
  const indexPage = await (await fetch(indexURL)).text()
  const lastAccessed = isFinite(applicationStorage.lastAccessed) ? applicationStorage.lastAccessed : null
  if (!lastAccessed || Date.now() > (new Date(lastAccessed)).getTime() + swfAccessTime || !applicationStorage.hasOwnProperty('lastSWFData')) {
    delete applicationStorage.lastSWFData
    applicationStorage.lastAccessed = Date.now()
  } else {
    //console.log('returning cached data')
    return new SWFData(applicationStorage.lastSWFData)
  }
  const indexDOM = cheerio.load(indexPage, { xmlMode: true, decodeEntities: false })
  let loaderName = indexDOM('embed').filter((index, embed) => (embed.attribs.src || "").toLowerCase().startsWith("agcloader")).attr("src")
  if (!loaderName) throw new Error("Unable to find the game's swf entry point")
  loaderName = loaderName.substring(0, loaderName.lastIndexOf('.'))
  const version = parseInt(loaderName.match(gameVersionRegex)[0])
  const clientName = 'AssembleeGameClient' + version
  const downloadPath = join(downloadFolder, clientName + '.swf')
  const swfExtractionFolder = join(extractionFolder, clientName)
  const url = indexURL + clientName + '.swf'
  const cachePath = join(cacheFolder, version + '.json')
  const output = new SWFData({url, clientName, loaderName, version, downloadPath, extractionFolder: swfExtractionFolder, cachePath})
  applicationStorage.lastSWFData = output
  return output
}

module.exports = getCurrentSWF