META-INF.resources.asset.ajaxjs-ui.js.libs.base64.js Maven / Gradle / Ivy
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AJAXJS Web aims to full-stack, not only the server-side framework, but also integrates the front-end library. It's written in HTML5 + Java, a successor to the JVM platform, efficient, secure, stable, cross-platform and many other advantages, but it abandoned the traditional enterprise architecture brought about by the large and bloated, emphasizing the lightweight, and fast, very suitable for the Internet fast application.
/**
* BASE64 Encode and Decode By UTF-8 unicode 可以和java的BASE64编码和解码互相转化
* @author [email protected]
*/
;(function() {
this.base64 = {
encode : btoa ? function(str) {
return btoa(unescape(encodeURIComponent(str)));
} : encode,
decode : atob ? function(str) {
return decodeURIComponent(escape(atob(str)));
} : decode
};
(function() {
var BASE64_MAPPING = [ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U',
'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4',
'5', '6', '7', '8', '9', '+', '/' ];
/**
* ascii convert to binary
*/
var _toBinary = function(ascii) {
var binary = new Array();
while (ascii > 0) {
var b = ascii % 2;
ascii = Math.floor(ascii / 2);
binary.push(b);
}
/*
* var len = binary.length; if(6-len > 0){ for(var i = 6-len ; i > 0 ;
* --i){ binary.push(0); } }
*/
binary.reverse();
return binary;
};
/**
* binary convert to decimal
*/
var _toDecimal = function(binary) {
var dec = 0;
var p = 0;
for (var i = binary.length - 1; i >= 0; --i) {
var b = binary[i];
if (b == 1) {
dec += Math.pow(2, p);
}
++p;
}
return dec;
};
/**
* unicode convert to utf-8
*/
var _toUTF8Binary = function(c, binaryArray) {
var mustLen = (8 - (c + 1)) + ((c - 1) * 6);
var fatLen = binaryArray.length;
var diff = mustLen - fatLen;
while (--diff >= 0) {
binaryArray.unshift(0);
}
var binary = [];
var _c = c;
while (--_c >= 0) {
binary.push(1);
}
binary.push(0);
var i = 0, len = 8 - (c + 1);
for (; i < len; ++i) {
binary.push(binaryArray[i]);
}
for (var j = 0; j < c - 1; ++j) {
binary.push(1);
binary.push(0);
var sum = 6;
while (--sum >= 0) {
binary.push(binaryArray[i++]);
}
}
return binary;
};
var __BASE64 = {
/**
* BASE64 Encode
*/
encoder : function(str) {
var base64_Index = [];
var binaryArray = [];
for (var i = 0, len = str.length; i < len; ++i) {
var unicode = str.charCodeAt(i);
var _tmpBinary = _toBinary(unicode);
if (unicode < 0x80) {
var _tmpdiff = 8 - _tmpBinary.length;
while (--_tmpdiff >= 0) {
_tmpBinary.unshift(0);
}
binaryArray = binaryArray.concat(_tmpBinary);
} else if (unicode >= 0x80 && unicode <= 0x7FF) {
binaryArray = binaryArray.concat(_toUTF8Binary(2,
_tmpBinary));
} else if (unicode >= 0x800 && unicode <= 0xFFFF) {// UTF-8
// 3byte
binaryArray = binaryArray.concat(_toUTF8Binary(3,
_tmpBinary));
} else if (unicode >= 0x10000 && unicode <= 0x1FFFFF) {// UTF-8
// 4byte
binaryArray = binaryArray.concat(_toUTF8Binary(4,
_tmpBinary));
} else if (unicode >= 0x200000 && unicode <= 0x3FFFFFF) {// UTF-8
// 5byte
binaryArray = binaryArray.concat(_toUTF8Binary(5,
_tmpBinary));
} else if (unicode >= 4000000 && unicode <= 0x7FFFFFFF) {// UTF-8
// 6byte
binaryArray = binaryArray.concat(_toUTF8Binary(6,
_tmpBinary));
}
}
var extra_Zero_Count = 0;
for (var i = 0, len = binaryArray.length; i < len; i += 6) {
var diff = (i + 6) - len;
if (diff == 2) {
extra_Zero_Count = 2;
} else if (diff == 4) {
extra_Zero_Count = 4;
}
// if(extra_Zero_Count > 0){
// len += extra_Zero_Count+1;
// }
var _tmpExtra_Zero_Count = extra_Zero_Count;
while (--_tmpExtra_Zero_Count >= 0) {
binaryArray.push(0);
}
base64_Index.push(_toDecimal(binaryArray.slice(i, i + 6)));
}
var base64 = '';
for (var i = 0, len = base64_Index.length; i < len; ++i) {
base64 += BASE64_MAPPING[base64_Index[i]];
}
for (var i = 0, len = extra_Zero_Count / 2; i < len; ++i) {
base64 += '=';
}
return base64;
},
/**
* BASE64 Decode for UTF-8
*/
decoder : function(_base64Str) {
var _len = _base64Str.length;
var extra_Zero_Count = 0;
/**
* 计算在进行BASE64编码的时候，补了几个0
*/
if (_base64Str.charAt(_len - 1) == '=') {
// alert(_base64Str.charAt(_len-1));
// alert(_base64Str.charAt(_len-2));
if (_base64Str.charAt(_len - 2) == '=') {// 两个等号说明补了4个0
extra_Zero_Count = 4;
_base64Str = _base64Str.substring(0, _len - 2);
} else {// 一个等号说明补了2个0
extra_Zero_Count = 2;
_base64Str = _base64Str.substring(0, _len - 1);
}
}
var binaryArray = [];
for (var i = 0, len = _base64Str.length; i < len; ++i) {
var c = _base64Str.charAt(i);
for (var j = 0, size = BASE64_MAPPING.length; j < size; ++j) {
if (c == BASE64_MAPPING[j]) {
var _tmp = _toBinary(j);
/* 不足6位的补0 */
var _tmpLen = _tmp.length;
if (6 - _tmpLen > 0) {
for (var k = 6 - _tmpLen; k > 0; --k) {
_tmp.unshift(0);
}
}
binaryArray = binaryArray.concat(_tmp);
break;
}
}
}
if (extra_Zero_Count > 0) {
binaryArray = binaryArray.slice(0, binaryArray.length
- extra_Zero_Count);
}
var unicode = [];
var unicodeBinary = [];
for (var i = 0, len = binaryArray.length; i < len;) {
if (binaryArray[i] == 0) {
unicode = unicode.concat(_toDecimal(binaryArray.slice(
i, i + 8)));
i += 8;
} else {
var sum = 0;
while (i < len) {
if (binaryArray[i] == 1) {
++sum;
} else {
break;
}
++i;
}
unicodeBinary = unicodeBinary.concat(binaryArray.slice(
i + 1, i + 8 - sum));
i += 8 - sum;
while (sum > 1) {
unicodeBinary = unicodeBinary.concat(binaryArray
.slice(i + 2, i + 8));
i += 8;
--sum;
}
unicode = unicode.concat(_toDecimal(unicodeBinary));
unicodeBinary = [];
}
}
return unicode;
}
};
window.BASE64 = __BASE64;
})();
})();