code: function stringToArrayBuffer(string) {
              var
                  buffer = new ArrayBuffer(string.length),
                  int8Array = new Uint8Array(buffer);
              
              for (var i = 0; i < string.length; i++) {
                  int8Array[i] = string.charCodeAt(i);
              }
              
              return buffer;
          }
docs: Convert a raw binary string (one character = one output byte) to an ArrayBuffer