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- /*
- * base64.js
- *
- * Licensed under the BSD 3-Clause License.
- * http://opensource.org/licenses/BSD-3-Clause
- *
- * References:
- * http://en.wikipedia.org/wiki/Base64
- */
- ;(function (global, factory) {
- typeof exports === 'object' && typeof module !== 'undefined'
- ? module.exports = factory(global)
- : typeof define === 'function' && define.amd
- ? define(factory) : factory(global)
- }((
- typeof self !== 'undefined' ? self
- : typeof window !== 'undefined' ? window
- : typeof global !== 'undefined' ? global
- : this
- ), function(global) {
- 'use strict';
- // existing version for noConflict()
- var _Base64 = global.Base64;
- var version = "2.4.9";
- // if node.js and NOT React Native, we use Buffer
- var buffer;
- if (typeof module !== 'undefined' && module.exports) {
- try {
- buffer = eval("require('buffer').Buffer");
- } catch (err) {
- buffer = undefined;
- }
- }
- // constants
- var b64chars
- = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
- var b64tab = function(bin) {
- var t = {};
- for (var i = 0, l = bin.length; i < l; i++) t[bin.charAt(i)] = i;
- return t;
- }(b64chars);
- var fromCharCode = String.fromCharCode;
- // encoder stuff
- var cb_utob = function(c) {
- if (c.length < 2) {
- var cc = c.charCodeAt(0);
- return cc < 0x80 ? c
- : cc < 0x800 ? (fromCharCode(0xc0 | (cc >>> 6))
- + fromCharCode(0x80 | (cc & 0x3f)))
- : (fromCharCode(0xe0 | ((cc >>> 12) & 0x0f))
- + fromCharCode(0x80 | ((cc >>> 6) & 0x3f))
- + fromCharCode(0x80 | ( cc & 0x3f)));
- } else {
- var cc = 0x10000
- + (c.charCodeAt(0) - 0xD800) * 0x400
- + (c.charCodeAt(1) - 0xDC00);
- return (fromCharCode(0xf0 | ((cc >>> 18) & 0x07))
- + fromCharCode(0x80 | ((cc >>> 12) & 0x3f))
- + fromCharCode(0x80 | ((cc >>> 6) & 0x3f))
- + fromCharCode(0x80 | ( cc & 0x3f)));
- }
- };
- var re_utob = /[\uD800-\uDBFF][\uDC00-\uDFFFF]|[^\x00-\x7F]/g;
- var utob = function(u) {
- return u.replace(re_utob, cb_utob);
- };
- var cb_encode = function(ccc) {
- var padlen = [0, 2, 1][ccc.length % 3],
- ord = ccc.charCodeAt(0) << 16
- | ((ccc.length > 1 ? ccc.charCodeAt(1) : 0) << 8)
- | ((ccc.length > 2 ? ccc.charCodeAt(2) : 0)),
- chars = [
- b64chars.charAt( ord >>> 18),
- b64chars.charAt((ord >>> 12) & 63),
- padlen >= 2 ? '=' : b64chars.charAt((ord >>> 6) & 63),
- padlen >= 1 ? '=' : b64chars.charAt(ord & 63)
- ];
- return chars.join('');
- };
- var btoa = global.btoa ? function(b) {
- return global.btoa(b);
- } : function(b) {
- return b.replace(/[\s\S]{1,3}/g, cb_encode);
- };
- var _encode = buffer ?
- buffer.from && Uint8Array && buffer.from !== Uint8Array.from
- ? function (u) {
- return (u.constructor === buffer.constructor ? u : buffer.from(u))
- .toString('base64')
- }
- : function (u) {
- return (u.constructor === buffer.constructor ? u : new buffer(u))
- .toString('base64')
- }
- : function (u) { return btoa(utob(u)) }
- ;
- var encode = function(u, urisafe) {
- return !urisafe
- ? _encode(String(u))
- : _encode(String(u)).replace(/[+\/]/g, function(m0) {
- return m0 == '+' ? '-' : '_';
- }).replace(/=/g, '');
- };
- var encodeURI = function(u) { return encode(u, true) };
- // decoder stuff
- var re_btou = new RegExp([
- '[\xC0-\xDF][\x80-\xBF]',
- '[\xE0-\xEF][\x80-\xBF]{2}',
- '[\xF0-\xF7][\x80-\xBF]{3}'
- ].join('|'), 'g');
- var cb_btou = function(cccc) {
- switch(cccc.length) {
- case 4:
- var cp = ((0x07 & cccc.charCodeAt(0)) << 18)
- | ((0x3f & cccc.charCodeAt(1)) << 12)
- | ((0x3f & cccc.charCodeAt(2)) << 6)
- | (0x3f & cccc.charCodeAt(3)),
- offset = cp - 0x10000;
- return (fromCharCode((offset >>> 10) + 0xD800)
- + fromCharCode((offset & 0x3FF) + 0xDC00));
- case 3:
- return fromCharCode(
- ((0x0f & cccc.charCodeAt(0)) << 12)
- | ((0x3f & cccc.charCodeAt(1)) << 6)
- | (0x3f & cccc.charCodeAt(2))
- );
- default:
- return fromCharCode(
- ((0x1f & cccc.charCodeAt(0)) << 6)
- | (0x3f & cccc.charCodeAt(1))
- );
- }
- };
- var btou = function(b) {
- return b.replace(re_btou, cb_btou);
- };
- var cb_decode = function(cccc) {
- var len = cccc.length,
- padlen = len % 4,
- n = (len > 0 ? b64tab[cccc.charAt(0)] << 18 : 0)
- | (len > 1 ? b64tab[cccc.charAt(1)] << 12 : 0)
- | (len > 2 ? b64tab[cccc.charAt(2)] << 6 : 0)
- | (len > 3 ? b64tab[cccc.charAt(3)] : 0),
- chars = [
- fromCharCode( n >>> 16),
- fromCharCode((n >>> 8) & 0xff),
- fromCharCode( n & 0xff)
- ];
- chars.length -= [0, 0, 2, 1][padlen];
- return chars.join('');
- };
- var atob = global.atob ? function(a) {
- return global.atob(a);
- } : function(a){
- return a.replace(/[\s\S]{1,4}/g, cb_decode);
- };
- var _decode = buffer ?
- buffer.from && Uint8Array && buffer.from !== Uint8Array.from
- ? function(a) {
- return (a.constructor === buffer.constructor
- ? a : buffer.from(a, 'base64')).toString();
- }
- : function(a) {
- return (a.constructor === buffer.constructor
- ? a : new buffer(a, 'base64')).toString();
- }
- : function(a) { return btou(atob(a)) };
- var decode = function(a){
- return _decode(
- String(a).replace(/[-_]/g, function(m0) { return m0 == '-' ? '+' : '/' })
- .replace(/[^A-Za-z0-9\+\/]/g, '')
- );
- };
- var noConflict = function() {
- var Base64 = global.Base64;
- global.Base64 = _Base64;
- return Base64;
- };
- // export Base64
- global.Base64 = {
- VERSION: version,
- atob: atob,
- btoa: btoa,
- fromBase64: decode,
- toBase64: encode,
- utob: utob,
- encode: encode,
- encodeURI: encodeURI,
- btou: btou,
- decode: decode,
- noConflict: noConflict,
- __buffer__: buffer
- };
- // if ES5 is available, make Base64.extendString() available
- if (typeof Object.defineProperty === 'function') {
- var noEnum = function(v){
- return {value:v,enumerable:false,writable:true,configurable:true};
- };
- global.Base64.extendString = function () {
- Object.defineProperty(
- String.prototype, 'fromBase64', noEnum(function () {
- return decode(this)
- }));
- Object.defineProperty(
- String.prototype, 'toBase64', noEnum(function (urisafe) {
- return encode(this, urisafe)
- }));
- Object.defineProperty(
- String.prototype, 'toBase64URI', noEnum(function () {
- return encode(this, true)
- }));
- };
- }
- //
- // export Base64 to the namespace
- //
- if (global['Meteor']) { // Meteor.js
- Base64 = global.Base64;
- }
- // module.exports and AMD are mutually exclusive.
- // module.exports has precedence.
- if (typeof module !== 'undefined' && module.exports) {
- module.exports.Base64 = global.Base64;
- }
- else if (typeof define === 'function' && define.amd) {
- // AMD. Register as an anonymous module.
- define([], function(){ return global.Base64 });
- }
- // that's it!
- return {Base64: global.Base64}
- }));
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