怎样使用AngularJS实现base64编码与解码

这次给大家带来怎样使用AngularJS实现base64编码与解码，使用AngularJS实现base64编码与解码的注意事项有哪些，下面就是实战案例，一起来看一下。

      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 > 2;     enc2 = ((chr1 & 3) <> 4);     enc3 = ((chr2 & 15) <> 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 <> 4);     chr2 = ((enc2 & 15) <> 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(//g, "");    var utftext = "";    for (var n = 0; n < string.length; n++) {     var c = string.charCodeAt(n);     if (c  127) && (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  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;   }  } 
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 var b = new Base64(); str = document.getElementById("p1").innerHTML; //解密 str = b.decode(str); document.getElementById("p1").innerHTML = str;

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