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-rw-r--r--js/webtoolkit.base64.js142
1 files changed, 142 insertions, 0 deletions
diff --git a/js/webtoolkit.base64.js b/js/webtoolkit.base64.js
new file mode 100644
index 000000000..5fa3c1ed7
--- /dev/null
+++ b/js/webtoolkit.base64.js
@@ -0,0 +1,142 @@
+/**
+*
+* Base64 encode / decode
+* http://www.webtoolkit.info/
+*
+**/
+
+var Base64 = {
+
+ // private property
+ _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
+
+ // public method for encoding
+ encode : function (input) {
+ var output = "";
+ var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
+ var i = 0;
+
+ input = Base64._utf8_encode(input);
+
+ while (i < input.length) {
+
+ chr1 = input.charCodeAt(i++);
+ chr2 = input.charCodeAt(i++);
+ chr3 = input.charCodeAt(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 +
+ this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
+ this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
+
+ }
+
+ return output;
+ },
+
+ // public method for decoding
+ decode : function (input) {
+ var output = "";
+ var chr1, chr2, chr3;
+ var enc1, enc2, enc3, enc4;
+ var i = 0;
+
+ input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
+
+ while (i < input.length) {
+
+ enc1 = this._keyStr.indexOf(input.charAt(i++));
+ enc2 = this._keyStr.indexOf(input.charAt(i++));
+ enc3 = this._keyStr.indexOf(input.charAt(i++));
+ enc4 = this._keyStr.indexOf(input.charAt(i++));
+
+ chr1 = (enc1 << 2) | (enc2 >> 4);
+ chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
+ chr3 = ((enc3 & 3) << 6) | enc4;
+
+ output = output + String.fromCharCode(chr1);
+
+ if (enc3 != 64) {
+ output = output + String.fromCharCode(chr2);
+ }
+ if (enc4 != 64) {
+ output = output + String.fromCharCode(chr3);
+ }
+
+ }
+
+ output = Base64._utf8_decode(output);
+
+ return output;
+
+ },
+
+ // private method for UTF-8 encoding
+ _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;
+ },
+
+ // private method for UTF-8 decoding
+ _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;
+ }
+
+}