Hash me again

// https://ringzer0team.com/challenges/14/

function binaryAgent(str) {
    var binString = '';

    str.split(' ').map(function(bin) {
        binString += String.fromCharCode(parseInt(bin, 2));
      });
    return binString;
}
$.getScript("https://cdn.rawgit.com/emn178/js-sha512/master/src/sha512.js", function(){
        // selecting the message from SRC
        let selectorBox = $(".message").text();
        // Removing the unnecessary stuffs from the message
        let arr= [];
        selectorBox = selectorBox.split("\n")[2].substring(2,selectorBox.lenght);
        arr = selectorBox.match(/.{1,8}/g);
        res = '';
        for(var i=0;i<arr.length;i++){
         res += binaryAgent(arr[i]);
        }
        var encrypted_ = sha512(res);
        window.location.href += '/' + encrypted_;
});