AngularJS实现的base64编码与解码功能示例

更新时间：2020-07-10 02:30:01 作者：startmvc

本文实例讲述了AngularJS实现的base64编码与解码功能。分享给大家供大家参考，具体如下：<

本文实例讲述了AngularJS实现的base64编码与解码功能。分享给大家供大家参考，具体如下：


<!DOCTYPE HTML>
<html>
<head>
 <meta charset="utf-8">
 <title>base64加密</title>
 <script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
 <script>
 function Base64() {
 // private property
 _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
 // public method for encoding
 this.encode = function (input) {
 var output = "";
 var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
 var i = 0;
 input = _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 +
 _keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
 _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
 }
 return output;
 }
 // public method for decoding
 this.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 = _keyStr.indexOf(input.charAt(i++));
 enc2 = _keyStr.indexOf(input.charAt(i++));
 enc3 = _keyStr.indexOf(input.charAt(i++));
 enc4 = _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 = _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;
 }
 }
 </script>
</head>
<body>
<p id="p1">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</p>
<script>
 var b = new Base64();
 str = document.getElementById("p1").innerHTML;
 //解密
 str = b.decode(str);
 document.getElementById("p1").innerHTML = str;
</script>
</body>
</html>

运行效果如下：