oier/PatataLauncher
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Began working on launching minecraft process. Implementing hash validation for asset downloads. Full integration for the latter will be complete soon.

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This commit is contained in:
Daniel Scalzi
2017-04-28 03:59:28 -04:00
parent ef420d4ba6
commit cf0afeb957
4 changed files with 108 additions and 17 deletions
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47
app/assets/js/assetdownload.js
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@@ -3,11 +3,13 @@ const request = require('request')
const path = require('path')
const mkpath = require('mkdirp');
const async = require('async')
const crypto = require('crypto')
function Asset(from, to, size){
function Asset(from, to, size, hash){
this.from = from
this.to = to
this.size = size
this.hash = hash
}
function AssetIndex(id, sha1, size, url, totalSize){
@@ -213,22 +215,26 @@ exports.downloadAssets = function(versionData, basePath){
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'])
const ast = new Asset(resourceURL + urlName, path.join(objectPath, assetName), ob['size'], hash)
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(){
if(!validateLocalIntegrity(asset.to, 'sha1', asset.hash)){
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()
})
} else {
cb()
})
}
}, function(err){
if(err){
console.log('An asset failed to process');
@@ -238,4 +244,23 @@ exports.downloadAssets = function(versionData, basePath){
})
})
})
}
validateLocalIntegrity = function(filePath, algo, hash){
if(fs.existsSync(filePath)){
let fileName = path.basename(filePath)
console.log('Validating integrity of local file', fileName)
let shasum = crypto.createHash(algo)
let content = fs.readFileSync(filePath)
shasum.update(content)
let localhash = shasum.digest('hex')
if(localhash === hash){
console.log('Hash value of ' + fileName + ' matches the index hash, woo!')
return true
} else {
console.log('Hash value of ' + fileName + ' (' + localhash + ')' + ' does not match the index hash. Redownloading..')
return false
}
}
return false;
}