// credit to github.com/dankogai/js-base64 (function(global){“use strict”;if(global.Base64)return;var version=“2.1.1”;var buffer;if(typeof module!==“undefined”&&module.exports){buffer=require(“buffer”).Buffer}var b64chars=“ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/”;var b64tab=function(bin){var t={};for(var i=0,l=bin.length;i=i;return t}(b64chars);var fromCharCode=String.fromCharCode;var cb_utob=function©{if(c.length<2){var cc=c.charCodeAt(0);return cc<128?c:cc<2048?fromCharCode(192|cc>>>6)+fromCharCode(128|cc&63):fromCharCode(224|cc>>>12&15)+fromCharCode(128|cc>>>6&63)+fromCharCode(128|cc&63)}else{var cc=65536+(c.charCodeAt(0)-55296)*1024+(c.charCodeAt(1)-56320);return fromCharCode(240|cc>>>18&7)+fromCharCode(128|cc>>>12&63)+fromCharCode(128|cc>>>6&63)+fromCharCode(128|cc&63)}};var re_utob=/[uDC00-uDFFFF]|/g;var utob=function(u){return u.replace(re_utob,cb_utob)};var cb_encode=function(ccc){var padlen=[b.replace(/{1,3}/g,cb_encode)};var _encode=buffer?function(u){return new buffer(u).toString(”base64“)}:function(u){return btoa(utob(u))};var encode=function(u,urisafe){return!urisafe?_encode(u):_encode(u).replace(//g,function(m0){return m0==”+“?”-“:”_“}).replace(/=/g,”“)};var encodeURI=function(u){return encode(u,true)};var re_btou=new RegExp([”[-¿]“,”[à-ï]{2}“,”[ð-÷]{3}“].join(”|“),”g“);var cb_btou=function(cccc){switch(cccc.length){case 4:var cp=(7&cccc.charCodeAt(0))<<18|(63&cccc.charCodeAt(1))<<12|(63&cccc.charCodeAt(2))<<6|63&cccc.charCodeAt(3),offset=cp-65536;return fromCharCode((offset>>>10)+55296)+fromCharCode((offset&1023)+56320);case 3:return fromCharCode((15&cccc.charCodeAt(0))<<12|(63&cccc.charCodeAt(1))<<6|63&cccc.charCodeAt(2));default:return fromCharCode((31&cccc.charCodeAt(0))<<6|63&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<<18:0)|(len>1?b64tab<<12:0)|(len>2?b64tab<<6:0)|(len>3?b64tab:chars.length-=[padlen];return chars.join(“”)};var atob=global.atob||function(a){return a.replace(/{1,4}/g,cb_decode)};var _decode=buffer?function(a){return new buffer(a,“base64”).toString()}:function(a){return btou(atob(a))};var decode=function(a){return _decode(a.replace(//g,function(m0){return m0==“-”?“+”:“/”}).replace(//g,“”))};global.Base64={VERSION:version,atob:atob,btoa:btoa,fromBase64:decode,toBase64:encode,utob:utob,encode:encode,encodeURI:encodeURI,btou:btou,decode:decode};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)}))}}})(this);