AngularJS实现的base64编码与解码功能示例

2019-11-19 13:49:31

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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：