開發(fā)微信公眾號(hào)的時(shí)候一直在循環(huán)重定向，怎么回事

大神幫我看看這是什么原因一直進(jìn)入不到success函數(shù)里面，一直alert（登錄失?。?，而且是循環(huán)的，因?yàn)檫M(jìn)入不到success里面所以存不了cookie，所以一直在重定向，崩潰了

let bind = Cookies.get("ptoken")
if (bind == undefined) {
  location.;

let json = {
  code:'001WYYaG1ffLF1038WdG1c81bG1WYYaa'
};
let url = location.hostname;
wx_login(json,function (res) {
  console.log(res);
  location.href = "http://" + url + "/dak/";
})
function wx_login(data, completion) {
  let time = Date.parse(new Date());
  let hash = hex_md5(time + "XXX");
  $.ajax({
    type: "post",
    url: "192.168.18.85:8080/weChatUserLogin",
    data: JSON.stringify(data),
    async: false,
    dataType: 'text',
    headers: {
      "token": "",
      "version": "1",
      "client_type": "3",
      "Timestamp": time,
      "SignInfo": hash,
      "Access-Control-Allow-Origin": "*",
    },
    contentType: "application/json;charset=UTF-8",
    success: function (res) {
      res = JSON.parse(res);
      Cookies.set('ptoken','wwwww');
      console.log(res);
      if (res.code == 0) { //登陸成功
        console.log(res);

      } else {
        console.log(res.message);
      }
    },
    error: function () {
      alert('登錄失敗');
    }
  })
}
}