jsはbase64暗号化を実装します

encode64: function(input)

{

var keyStr = "ABCDEFGHIJKLMNOP" +"QRSTUVWXYZabcdef" +"ghijklmnopqrstuv" +"wxyz0123456789+/" + "=";

var 出力 = "";

var chr1、chr2 , chr3 = "";

var enc1, enc2, enc3, enc4 = "";

var i = 0;

do

chr1 = input.char CodeAt(i++);

chr2 = 入力。 charCodeAt(i++);

chr3 = input.charCodeAt(i++);

enc1 = chr1 >> 2;

enc2 = ((chr1 & 3)

enc3 = ((chr2 & 15)

enc4 = chr3 & 63;

if (isNaN(chr2)){

enc3 = enc4 = 64;

}else if (isNaN( chr3)){

enc4 = 64;

}

出力 = 出力 +

keyStr.charAt(enc1) +

keyStr.charAt(enc2) +

keyStr.charAt(enc3)