239 lines
8.2 KiB
JavaScript
239 lines
8.2 KiB
JavaScript
const fs = require('fs')
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const request = require('request')
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const path = require('path')
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const mkpath = require('mkdirp');
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const async = require('async')
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const crypto = require('crypto')
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const Library = require('./library.js')
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const {BrowserWindow} = require('electron')
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/**
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* PHASING THIS OUT, WILL BE REMOVED WHEN ASSET GUARD MODULE IS COMPLETE!
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*/
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function Asset(from, to, size, hash){
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this.from = from
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this.to = to
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this.size = size
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this.hash = hash
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}
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function AssetIndex(id, sha1, size, url, totalSize){
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this.id = id
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this.sha1 = sha1
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this.size = size
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this.url = url
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this.totalSize = totalSize
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}
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/**
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* This function will download the version index data and read it into a Javascript
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* Object. This object will then be returned.
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*/
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parseVersionData = function(version, basePath){
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const name = version + '.json'
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const baseURL = 'https://s3.amazonaws.com/Minecraft.Download/versions/' + version + '/' + name
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const versionPath = path.join(basePath, 'versions', version)
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return new Promise(function(fulfill, reject){
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request.head(baseURL, function(err, res, body){
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console.log('Preparing download of ' + version + ' assets.')
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mkpath.sync(versionPath)
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const stream = request(baseURL).pipe(fs.createWriteStream(path.join(versionPath, name)))
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stream.on('finish', function(){
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fulfill(JSON.parse(fs.readFileSync(path.join(versionPath, name))))
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})
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})
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})
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}
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/**
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* Download the client for version. This file is 'client.jar' although
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* it must be renamed to '{version}'.jar.
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*/
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downloadClient = function(versionData, basePath){
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const dls = versionData['downloads']
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const clientData = dls['client']
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const url = clientData['url']
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const size = clientData['size']
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const version = versionData['id']
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const sha1 = clientData['sha1']
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const targetPath = path.join(basePath, 'versions', version)
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const targetFile = version + '.jar'
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if(!validateLocalIntegrity(path.join(targetPath, targetFile), 'sha1', sha1)){
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request.head(url, function(err, res, body){
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console.log('Downloading ' + version + ' client..')
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mkpath.sync(targetPath)
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const stream = request(url).pipe(fs.createWriteStream(path.join(targetPath, targetFile)))
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stream.on('finish', function(){
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console.log('Finished downloading ' + version + ' client.')
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})
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})
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}
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}
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downloadLogConfig = function(versionData, basePath){
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const logging = versionData['logging']
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const client = logging['client']
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const file = client['file']
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const version = versionData['id']
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const sha1 = file['sha1']
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const targetPath = path.join(basePath, 'assets', 'log_configs')
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const name = file['id']
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const url = file['url']
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if(!validateLocalIntegrity(path.join(targetPath, name), 'sha1', sha1)){
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request.head(url, function(err, res, body){
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console.log('Downloading ' + version + ' log config..')
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mkpath.sync(targetPath)
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const stream = request(url).pipe(fs.createWriteStream(path.join(targetPath, name)))
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stream.on('finish', function(){
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console.log('Finished downloading ' + version + ' log config..')
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})
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})
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}
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}
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downloadLibraries = function(versionData, basePath){
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const libArr = versionData['libraries']
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const libPath = path.join(basePath, 'libraries')
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let win = BrowserWindow.getFocusedWindow()
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const libDlQueue = []
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let dlSize = 0
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//Check validity of each library. If the hashs don't match, download the library.
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libArr.forEach(function(lib, index){
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if(Library.validateRules(lib.rules)){
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let artifact = null
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if(lib.natives == null){
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artifact = lib.downloads.artifact
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} else {
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artifact = lib.downloads.classifiers[lib.natives[Library.mojangFriendlyOS()]]
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}
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const libItm = new Library(lib.name, artifact.sha1, artifact.size, artifact.url, path.join(libPath, artifact.path))
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if(!validateLocalIntegrity(libItm.to, 'sha1', libItm.sha1)){
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dlSize += libItm.size
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libDlQueue.push(libItm)
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}
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}
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})
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let acc = 0;
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//Download all libraries that failed validation.
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async.eachLimit(libDlQueue, 1, function(lib, cb){
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mkpath.sync(path.join(lib.to, '..'))
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let req = request(lib.from)
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let writeStream = fs.createWriteStream(lib.to)
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req.pipe(writeStream)
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req.on('data', function(chunk){
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acc += chunk.length
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//console.log('Progress', acc/dlSize)
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win.setProgressBar(acc/dlSize)
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})
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writeStream.on('close', cb)
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}, function(err){
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if(err){
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console.log('A library failed to process');
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} else {
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console.log('All libraries have been processed successfully');
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}
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win.setProgressBar(-1)
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})
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}
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/**
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* Given an index url, this function will asynchonously download the
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* assets associated with that version.
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*/
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downloadAssets = function(versionData, basePath){
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//Asset index constants.
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const assetIndex = versionData.assetIndex
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const indexURL = assetIndex.url
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const gameVersion = versionData.id
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const assetVersion = assetIndex.id
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const name = assetVersion + '.json'
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//Asset constants
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const resourceURL = 'http://resources.download.minecraft.net/'
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const localPath = path.join(basePath, 'assets')
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const indexPath = path.join(localPath, 'indexes')
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const objectPath = path.join(localPath, 'objects')
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let win = BrowserWindow.getFocusedWindow()
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const assetIndexLoc = path.join(indexPath, name)
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/*if(!fs.existsSync(assetIndexLoc)){
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}*/
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console.log('Downloading ' + gameVersion + ' asset index.')
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mkpath.sync(indexPath)
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const stream = request(indexURL).pipe(fs.createWriteStream(assetIndexLoc))
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stream.on('finish', function() {
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const data = JSON.parse(fs.readFileSync(assetIndexLoc, 'utf-8'))
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const assetDlQueue = []
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let dlSize = 0;
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Object.keys(data.objects).forEach(function(key, index){
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const ob = data.objects[key]
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const hash = ob.hash
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const assetName = path.join(hash.substring(0, 2), hash)
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const urlName = hash.substring(0, 2) + "/" + hash
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const ast = new Asset(resourceURL + urlName, path.join(objectPath, assetName), ob.size, String(ob.hash))
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if(!validateLocalIntegrity(ast.to, 'sha1', ast.hash)){
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dlSize += ast.size
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assetDlQueue.push(ast)
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}
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})
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let acc = 0;
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async.eachLimit(assetDlQueue, 5, function(asset, cb){
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mkpath.sync(path.join(asset.to, ".."))
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let req = request(asset.from)
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let writeStream = fs.createWriteStream(asset.to)
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req.pipe(writeStream)
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req.on('data', function(chunk){
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acc += chunk.length
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console.log('Progress', acc/dlSize)
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win.setProgressBar(acc/dlSize)
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})
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writeStream.on('close', cb)
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}, function(err){
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if(err){
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console.log('An asset failed to process');
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} else {
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console.log('All assets have been processed successfully');
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}
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win.setProgressBar(-1)
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})
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})
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}
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validateLocalIntegrity = function(filePath, algo, hash){
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if(fs.existsSync(filePath)){
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let fileName = path.basename(filePath)
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console.log('Validating integrity of local file', fileName)
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let shasum = crypto.createHash(algo)
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let content = fs.readFileSync(filePath)
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shasum.update(content)
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let localhash = shasum.digest('hex')
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if(localhash === hash){
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console.log('Hash value of ' + fileName + ' matches the index hash, woo!')
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return true
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} else {
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console.log('Hash value of ' + fileName + ' (' + localhash + ')' + ' does not match the index hash. Redownloading..')
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return false
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}
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}
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return false;
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}
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module.exports = {
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parseVersionData,
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downloadClient,
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downloadLogConfig,
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downloadLibraries,
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downloadAssets
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} |