Tested 8 different obfuscators (except www.javascriptobfuscator.com), and was amazed by how much they all suck. Ended up writing my own obfuscator using regular expressions. Enjoy:
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;
}
