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64 lines
2.2 KiB
JavaScript
64 lines
2.2 KiB
JavaScript
3 years ago
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/**
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*
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* Base64 encode / decode
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* http://www.webtoolkit.info/
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*
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**/
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(function() {
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// private property
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var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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// private method for UTF-8 encoding
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function utf8Encode(string) {
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string = string.replace(/\r\n/g,"\n");
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var utftext = "";
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for (var n = 0; n < string.length; n++) {
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var c = string.charCodeAt(n);
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if (c < 128) {
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utftext += String.fromCharCode(c);
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}
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else if((c > 127) && (c < 2048)) {
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utftext += String.fromCharCode((c >> 6) | 192);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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else {
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utftext += String.fromCharCode((c >> 12) | 224);
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utftext += String.fromCharCode(((c >> 6) & 63) | 128);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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}
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return utftext;
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}
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Ext.define("Ext.ux.exporter.Base64", {
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statics: {
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//This was the original line, which tries to use Firefox's built in Base64 encoder, but this kept throwing exceptions....
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// encode : (typeof btoa == 'function') ? function(input) { return btoa(input); } : function (input) {
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encode : function (input) {
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var output = "";
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var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
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var i = 0;
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input = utf8Encode(input);
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while (i < input.length) {
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chr1 = input.charCodeAt(i++);
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chr2 = input.charCodeAt(i++);
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chr3 = input.charCodeAt(i++);
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enc1 = chr1 >> 2;
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enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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enc4 = chr3 & 63;
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if (isNaN(chr2)) {
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enc3 = enc4 = 64;
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} else if (isNaN(chr3)) {
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enc4 = 64;
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}
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output = output +
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keyStr.charAt(enc1) + keyStr.charAt(enc2) +
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keyStr.charAt(enc3) + keyStr.charAt(enc4);
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}
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return output;
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}}
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});
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})();
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