All the Code Security You Need

Lots of beginning JS coders seem to have this idea that the web is all about having your cake and eating it too. I want to participate in the glorious Internet revolution, I just don't want to share my ideas or information with anybody else. I'm writing rich internet applications that are so great, just so unique, that I want to make sure nobody else can possibly look at my code and steal all those great juicy super-awesome proprietary ideas I've got. And maybe, just for bragging rights, I want my files to look HUGE as well. I've mocked up a handy little device that can take care of both tasks at once. Behold, the decompressJS module:

var decompressJS = (function () {
    var encoding = [' ', '\t', '\n', '\r'];
    var revEncoding = (function () {
        var ec = {};
        for (var i=0; i<encoding.length; i++) {
            ec[encoding[i]] = i;
        };
        return ec;
    })();

    return {
        encode: function (codeText) {
            var out = [], cc, i=0, len=codeText.length;

            while (i<len) {
                cc = codeText.charCodeAt(i++);

                // JS chars are actually 16-bit UTF-16 chars, 
                // so we need 4 chars encoded per source char
                // to fully encode
                for (var j=0; j<8; j+=2) {
                    out.push(encoding[(cc>>j)&3]);
                }

            }
            return out.join('');
        },

        decode: function (encodedText) {
            var out = [], cur, i=0, len=encodedText.length;
            while (i<len) {
                cur = 0;
                for (var j=0; j<8; j+=2) {
                    cur += revEncoding[encodedText.charAt(i++)]<<j;
                }
                out.push(String.fromCharCode(cur));
            }
            return out.join('');
        }
    };

})();

Like any mature programming paradigm, my decompressJS can even effectively encode and decode itself, the above 1225-character-long code example (including whitespace) decompressed neatly into an all-whitespace string with no fewer than 4900 characters! Just run your code through this baby and it'll come out the other end fully converted into only invisible whitespace characters! Transfer your JS code over the wire, making it look like nothing but an empty file with all whitespace! Magically increase your file size by a factor of 4! Impress your colleagues with your invisible code! Who's laughing now, code stealers?