function getYSC () {
  const isInstance = createIS();
  const ciphertext = 'M1JyMHpsbXpPMUlUQWVZUQ==';
  const xhr = new XMLHttpRequest();
  if (typeof yscUrl === 'undefined') {
    window.location.href = globalLoginUrl;
    return false;
  }
  xhr.open('get', yscUrl, false);
  xhr.send(null);
  if (xhr.status === 200) {
    const data = JSON.parse(xhr.responseText)
    if (data.status === 0) {
      const dataType = Object.prototype.toString.call(data.data);
      if (dataType === '[object String]') {
        window.YISACONF = isInstance.aesUtil.decrypt(data.data, atob(ciphertext));
      } else {
        window.YISACONF = data.data;
      }
    }else if(data.status === 4){
      window.location.href = data.jumpUrl
    }else {
      window.location.href = globalLoginUrl;
    }
  } else {
    window.location.href = globalLoginUrl;
  }
}

getYSC();