什么是最好的JavaScript混淆器？

Question

我正在寻找使用JavaScript混淆器。什么是一些最受欢迎的产品，它们对性能有什么影响？

Answer 1

雅虎有一个很不错的。它在技术上是一个缩小器，但它在这个过程中做了一个很好的混淆处理。

YUI Compressor

Answer 2

好吧，谷歌提出了这个作为第一个链接：

http://www.javascriptobfuscator.com

但我不知道的JavaScript良好的混淆一样。无论你在JavaScript中做什么需要混淆，都应该在服务器端完成，对吗？

Answer 3

我从来没有在生产中使用混淆器，但我测试过JavaScript Utility，似乎很不错。

至于性能，混淆代码必须在每次加载页面时，在每次加载页面时动态解压缩。对于小脚本可能不是问题，但拆包时间对于更大的文件会很重要。另一方面，缩小的代码可以直接由浏览器执行。

某些混淆器可能会产生不能在较旧或较不常见的浏览器中运行的输出。您应该仔细测试您计划支持的浏览器。

Answer 4

你也可以试试Dean Edwards写的JavaScript Compressor。

Answer 5

我不得不说Hackvertor（不记得我写了）它是免费的，它支持基于标签的转换。退房的例子： -

http://www.businessinfo.co.uk/labs/hackvertor/hackvertor.php#PEBoYXNlZ2F3YV83KCKqwMHCw8TGyMnKy8zNzs%2FQ0dLT1NXW2Nna29zd3t%2Fg4eLj5OXm5%2Bjp6uvs7e7v8PHy8%2FT19vj5%2Bvv8%2Ff4kXyIpPmFsZXJ0KCJJJ2Qgc2F5IEhhY2t2ZXJ0b3IiKTxAL2hhc2VnYXdhXzc%2B

Answer 6

测试8个不同的模糊处理（除www.javascriptobfuscator.com），并通过他们都多少吸惊讶。最终用正则表达式编写自己的混淆器。享受：

static Dictionary<string, string> names = new Dictionary<string, string>(); 
static bool testing = false; 
static string[] files1 = 
    @"a.js,b.js,c.js" 
    .Split(new string[] { Environment.NewLine, " ", "\t", "," }, StringSplitOptions.RemoveEmptyEntries); 
static string[] ignore_names = 
    @"sin,cos,order,min,max,join,round,pow,abs,PI,floor,random,index,http, 
    __defineGetter__,__defineSetter__,indexOf,isPrototypeOf,length,clone,toString,split,clear,erase 
    RECT,SIZE,Vect,VectInt,vectint,vect,int,double,canvasElement,text1,text2,text3,textSizeTester,target,Number 
    number,TimeStep,images,solid,white,default,cursive,fantasy,". 
    Split(new string[] { Environment.NewLine, " ", "\t", "," }, StringSplitOptions.RemoveEmptyEntries); 
string[] extra_names = @"a,b,c".Split(new string[] { Environment.NewLine, " ", "\t", "," }, StringSplitOptions.RemoveEmptyEntries); 
string src = @"C:\temp"; 
string dest1 = src + "\\all1.js"; 
string dest2 = src + "\\all2.js"; 

static void Main() 
{ 
    File.Delete(dest1); 
    File.Delete(dest2); 
    foreach (string s in files1) 
    File.AppendAllText(dest1, File.ReadAllText(src + "\\" + s) + Environment.NewLine + Environment.NewLine + Environment.NewLine + Environment.NewLine + Environment.NewLine + Environment.NewLine, Encoding.UTF8); 

    string all = File.ReadAllText(dest1); 
    int free_index = 0; 

    foreach (string s in extra_names) 
    { 
    free_index++; 
    string free_name = "" + (char)('A' + (free_index % 25)) + (char)('A' + ((free_index/25) % 25)); 
    Debug.Assert(free_name != "AA"); 
    names.Add(s, free_name); 
    } 

    Regex reg1 = new Regex("(var |function |\\.prototype\\.)([a-zA-Z0-9_]+)"); 

    int startat = 0; 
    while (startat < all.Length) 
    { 
    Match match = reg1.Match(all, startat); 
    if (!match.Success) 
     break; 

    string key = all.Substring(match.Groups[2].Index, match.Groups[2].Length); 
    if (!ignore_names.Contains(key)) 
    { 
     free_index++; 
     string free_name = "" + (char)('A' + (free_index % 25)) + (char)('A' + ((free_index/25) % 25)); 
     Debug.Assert(free_name != "AA"); 
     if (!names.ContainsKey(key)) 
     names.Add(key, testing ? key + free_name : free_name); 
    } 
    startat = match.Groups[0].Index + match.Groups[0].Length; 
    } 

    Regex reg2 = new Regex(@"/\*.*\*/", RegexOptions.Multiline); 
    Regex reg3 = new Regex("([^:\\\\])//.*\r\n"); 
    Regex reg4 = new Regex("([a-zA-Z0-9_]+)"); 
    Regex reg5 = new Regex("(\r\n)*[ \t]+"); 
    Regex reg6 = new Regex("(\r\n)+"); 
    all = reg2.Replace(all, eval2); 
    all = reg3.Replace(all, eval3); 
    all = reg4.Replace(all, eval4); 
    all = reg5.Replace(all, eval5); 
    all = reg6.Replace(all, eval6); 
    File.WriteAllText(dest2, all); 
} 

public static string eval4(Match match) 
{ 
    return names.ContainsKey(match.Groups[1].Value) ? names[match.Groups[1].Value] : match.Groups[0].Value; 
} 
public static string eval5(Match match) 
{ 
    return string.IsNullOrEmpty(match.Groups[1].Value) ? " " : Environment.NewLine; 
} 
public static string eval6(Match match) 
{ 
    return Environment.NewLine; 
} 
public static string eval2(Match match) 
{ 
    return " "; 
} 
public static string eval3(Match match) 
{ 
    return match.Groups[1].Value + Environment.NewLine; 
} 

Answer 7

帕克用base62

http://dean.edwards.name/packer/
https://github.com/jcoglan/packr < =红宝石版本