javascript ArrayBuffer和String转换

eumnq8

function ab2str(buf) {
  return String.fromCharCode.apply(null, new Uint8Array(buf));
}
function str2ab(str) {
  var buf = new ArrayBuffer(str.length * 2); // 每个字符占用2个字节
  var bufView = new Uint16Array(buf);
  for (var i = 0, strLen = str.length; i < strLen; i++) {
    bufView[i] = str.charCodeAt(i);
  }
  return buf;
}