const fs = require('fs') const request = require('request') const path = require('path') const mkpath = require('mkdirp'); const async = require('async') function Asset(from, to, size){ this.from = from this.to = to this.size = size } function AssetIndex(id, sha1, size, url, totalSize){ this.id = id this.sha1 = sha1 this.size = size this.url = url this.totalSize = totalSize } function ClientDownload(){ } function ServerDownload(){ } function Library(){ } /** * This function will download the version index data and read it into a Javascript * Object. This object will then be returned. */ exports.parseVersionData = function(version, basePath){ const name = version + '.json' const baseURL = 'https://s3.amazonaws.com/Minecraft.Download/versions/' + version + '/' + name const versionPath = path.join(basePath, 'versions', version) return new Promise(function(fulfill, reject){ request.head(baseURL, function(err, res, body){ console.log('Preparing download of ' + version + ' assets.') mkpath.sync(versionPath) const stream = request(baseURL).pipe(fs.createWriteStream(path.join(versionPath, name))) stream.on('finish', function(){ fulfill(JSON.parse(fs.readFileSync(path.join(versionPath, name)))) }) }) }) } /** * Download the client for version. This file is 'client.jar' although * it must be renamed to '{version}'.jar. */ exports.downloadClient = function(versionData, basePath){ const dls = versionData['downloads'] const clientData = dls['client'] const url = clientData['url'] const size = clientData['size'] const version = versionData['id'] const targetPath = path.join(basePath, 'versions', version) const targetFile = version + '.jar' request.head(url, function(err, res, body){ console.log('Downloading ' + version + ' client..') mkpath.sync(targetPath) const stream = request(url).pipe(fs.createWriteStream(path.join(targetPath, targetFile))) stream.on('finish', function(){ console.log('Finished downloading ' + version + ' client.') }) }) } exports.downloadLogConfig = function(versionData, basePath){ const logging = versionData['logging'] const client = logging['client'] const file = client['file'] const version = versionData['id'] const targetPath = path.join(basePath, 'assets', 'log_configs') const name = file['id'] const url = file['url'] request.head(url, function(err, res, body){ console.log('Downloading ' + version + ' log config..') mkpath.sync(targetPath) const stream = request(url).pipe(fs.createWriteStream(path.join(targetPath, name))) stream.on('finish', function(){ console.log('Finished downloading ' + version + ' log config..') }) }) } exports.downloadLibraries = function(versionData, basePath){ const libArr = versionData['libraries'] const libPath = path.join(basePath, 'libraries') async.eachLimit(libArr, 1, function(lib, cb){ if(validateRules(lib['rules'])){ if(lib['natives'] == null){ const dlInfo = lib['downloads'] const artifact = dlInfo['artifact'] const libSize = artifact['size'] const to = path.join(libPath, artifact['path']) const from = artifact['url'] mkpath.sync(path.join(to, "..")) let req = request(from) let writeStream = fs.createWriteStream(to) req.pipe(writeStream) let acc = 0; req.on('data', function(chunk){ acc += chunk.length console.log('Progress', acc/libSize) }) writeStream.on('close', function(){ cb() }) } else { //TODO Perform native extraction. } } }, function(err){ if(err){ console.log('A file failed to process'); } else { console.log('All files have been processed successfully'); } }) } validateRules = function(rules){ if(rules == null) return true; rules.forEach(function(rule){ const action = rule['action'] if(action != null){ if(action === 'disallow'){ osName = action['os'] if(osName != null){ if(osName === mojangFriendlyOS()){ return false; } } } } }) return true; } mojangFriendlyOS = function(){ const opSys = process.platform if (opSys === 'darwin') { return 'osx' } else if (opSys === 'win32'){ return 'windows' } else if (opSys === 'linux'){ return 'linux' } else { return 'unknown_os' } } /** * Given an index url, this function will asynchonously download the * assets associated with that version. */ exports.downloadAssets = function(versionData, basePath){ //Asset index constants. const assetIndex = versionData['assetIndex'] const indexURL = assetIndex['url'] const datasize = assetIndex['totalSize'] const gameVersion = versionData['id'] const assetVersion = assetIndex['id'] const name = assetVersion + '.json' //Asset constants const resourceURL = 'http://resources.download.minecraft.net/' const localPath = path.join(basePath, 'assets') const indexPath = path.join(localPath, 'indexes') const objectPath = path.join(localPath, 'objects') request.head(indexURL, function (err, res, body) { console.log('Downloading ' + gameVersion + ' asset index.') mkpath.sync(indexPath) const stream = request(indexURL).pipe(fs.createWriteStream(path.join(indexPath, name))) stream.on('finish', function() { const data = JSON.parse(fs.readFileSync(path.join(indexPath, name), 'utf-8')) const assetArr = [] Object.keys(data['objects']).forEach(function(key, index){ const ob = data['objects'][key] const hash = String(ob['hash']) const assetName = path.join(hash.substring(0, 2), hash) const urlName = hash.substring(0, 2) + "/" + hash const ast = new Asset(resourceURL + urlName, path.join(objectPath, assetName), ob['size']) assetArr.push(ast) }) let acc = 0; async.eachLimit(assetArr, 5, function(asset, cb){ mkpath.sync(path.join(asset.to, "..")) let req = request(asset.from) let writeStream = fs.createWriteStream(asset.to) req.pipe(writeStream) req.on('data', function(chunk){ acc += chunk.length console.log('Progress', acc/datasize) }) writeStream.on('close', function(){ cb() }) }, function(err){ if(err){ console.log('A file failed to process'); } else { console.log('All files have been processed successfully'); } }) }) }) }