diff --git a/lib/assets/libs/_base64.js b/lib/assets/libs/_base64.js
new file mode 100644
--- /dev/null
+++ b/lib/assets/libs/_base64.js
@@ -0,0 +1,163 @@
+var $module=(function($B){
+
+var _b_ = $B.builtins,
+    _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
+
+function make_alphabet(altchars){
+    var alphabet = _keyStr
+    if(altchars!==undefined && altchars!==_b_.None){
+        // altchars is an instance of Python bytes
+        var source = altchars.source
+        alphabet = alphabet.substr(0,alphabet.length-3)+
+            _b_.chr(source[0])+_b_.chr(source[1])+'='
+    }
+    return alphabet
+}
+
+var Base64 = {
+
+    encode: function(bytes, altchars) {
+
+        var input = bytes.source
+        var output = "";
+        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
+        var i = 0;
+
+        var alphabet = make_alphabet(altchars)
+
+        while (i < input.length) {
+
+            chr1 = input[i++];
+            chr2 = input[i++];
+            chr3 = input[i++];
+
+            enc1 = chr1 >> 2;
+            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
+            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
+            enc4 = chr3 & 63;
+
+            if (isNaN(chr2)) {
+                enc3 = enc4 = 64;
+            } else if (isNaN(chr3)) {
+                enc4 = 64;
+            }
+
+            output = output + alphabet.charAt(enc1) + 
+                alphabet.charAt(enc2) + 
+                alphabet.charAt(enc3) + 
+                alphabet.charAt(enc4);
+
+        }
+        return _b_.bytes(output, 'utf-8', 'strict');
+    },
+
+
+    decode: function(bytes, altchars, validate) {
+        var output = [];
+        var chr1, chr2, chr3;
+        var enc1, enc2, enc3, enc4;
+        
+        var alphabet = make_alphabet(altchars)
+        
+        var input = bytes.source
+
+        // If validate is set, check that all characters in input
+        // are in the alphabet
+        var _input = ''
+        for(var i=0, len=input.length;i<len;i++){
+            var car = String.fromCharCode(input[i])
+            if(alphabet.search(car)==-1){
+                if(validate){throw 'binascii_error'}
+            }else{_input+=car}
+        }
+        input = _input;
+
+        var i = 0;
+        while (i < input.length) {
+
+            enc1 = alphabet.indexOf(input.charAt(i++));
+            enc2 = alphabet.indexOf(input.charAt(i++));
+            enc3 = alphabet.indexOf(input.charAt(i++));
+            enc4 = alphabet.indexOf(input.charAt(i++));
+
+            chr1 = (enc1 << 2) | (enc2 >> 4);
+            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
+            chr3 = ((enc3 & 3) << 6) | enc4;
+
+            output.push(chr1);
+
+            if (enc3 != 64) {
+                output.push(chr2);
+            }
+            if (enc4 != 64) {
+                output.push(chr3);
+            }
+
+        }
+        // return Python bytes
+        return _b_.bytes(output, 'utf-8', 'strict')
+
+    },
+
+    _utf8_encode: function(string) {
+        string = string.replace(/\r\n/g, "\n");
+        var utftext = "";
+
+        for (var n = 0; n < string.length; n++) {
+
+            var c = string.charCodeAt(n);
+
+            if (c < 128) {
+                utftext += String.fromCharCode(c);
+            }
+            else if ((c > 127) && (c < 2048)) {
+                utftext += String.fromCharCode((c >> 6) | 192);
+                utftext += String.fromCharCode((c & 63) | 128);
+            }
+            else {
+                utftext += String.fromCharCode((c >> 12) | 224);
+                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
+                utftext += String.fromCharCode((c & 63) | 128);
+            }
+
+        }
+
+        return utftext;
+    },
+
+    _utf8_decode: function(utftext) {
+        var string = "";
+        var i = 0;
+        var c = c1 = c2 = 0;
+
+        while (i < utftext.length) {
+
+            c = utftext.charCodeAt(i);
+
+            if (c < 128) {
+                string += String.fromCharCode(c);
+                i++;
+            }
+            else if ((c > 191) && (c < 224)) {
+                c2 = utftext.charCodeAt(i + 1);
+                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
+                i += 2;
+            }
+            else {
+                c2 = utftext.charCodeAt(i + 1);
+                c3 = utftext.charCodeAt(i + 2);
+                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
+                i += 3;
+            }
+
+        }
+
+        return string;
+    }
+
+}
+
+return {Base64:Base64}
+}
+
+)(__BRYTHON__)
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