JavaScript端口扫描工具

var AttackAPI = {};
AttackAPI.PortScanner = {};
AttackAPI.PortScanner.scanPort = function (callback, target, port, timeout) {
  var timeout = timeout == null ? 100 : timeout;
  var msg = new Image();
  msg.onerror = function () {
    if (!msg) return;
    msg = undefined;
    callback(target, port, ' --- 开启');
  };

  msg.onload = msg.onerror;
  msg.src = 'http://' + target + ':' + port;

  setTimeout(function () {
    if (!msg) return;
    msg = undefined;
    callback(target, port, ' --- 关闭');
  }, timeout);
};
AttackAPI.PortScanner.scanTarget = function (callback, target, ports, timeout) {
  for (index = 0; index < ports.length; index++)
    AttackAPI.PortScanner.scanPort(callback, target, ports[index], timeout);
};
var result = document.getElementById('result');
var callback = function (target, port, status) {
  result.value += target + ':' + port + status + ' \n';
};
var scan = function (form) {
  // 清空结果
  var obj = document.getElementById('result');
  obj.value = '';
  AttackAPI.PortScanner.scanTarget(
    callback,
    form.target.value,
    form.port.value.split(','),
    form.timeout.value
  );
};