请求xmlHttpRequest js通用“获取”方法的问题

Question

我有一个带有JavaScript的get方法的泛型类，当我尝试访问我的方法时，当我多次使用此get方法嵌套时，对于从get方法获得的电子邮件值已经存在相同的结果。

这是我的通用方法。

var client = new HttpClient();

client.get(API_PRESTASHOP_END_POINT + '/customers', function(response) {

  var response = JSON.parse(response);

  var arrIndex = response.customers;

  var i = 0;

  for(idx in arrIndex) {

    //console.log(idx + ':' + id); OK

    var http = new HttpClient();

    http.get(API_PRESTASHOP_END_POINT + '/customers/' + arrIndex[idx].id, function(res) {

    //console.log(res); OK

    var request = window.indexedDB.open("modullo", 1);

      request.onsuccess = function(ev) {

        db = ev.target.result;

        var transaction = db.transaction(['customers'], 'readonly');
        var objectStore = transaction.objectStore('customers');

        var index = objectStore.index('email');

        index.openCursor().onsuccess = function(event) {

          var cursor = event.target.result;

          if(cursor) {

            //console.log(cursor.key); cursor.continue(); OK
            var object = JSON.parse(res);
            var email = object.customer.email;
            //console.log(cursor.key + ':' + email); NOT OK (email already the same email value)

            //console.log(object);

            if(cursor.key == email) {

              //console.log(cursor.value.email + ':' + email); return;

              //console.log(cursor.primaryKey); return;

              var req = db.transaction(['customers'], 'readwrite').objectStore('customers').delete(Number(cursor.primaryKey));

              req.onsuccess = function (event) {

                i++;

                console.log('The user already has a Prestashop account...');

                console.log(i + ' deletion');
              }

            } else {

              cursor.continue();
            }
          }
        }
      }

    }, {"Output-Format": "JSON", "Authorization" : "Basic " + btoa(API_KEY_PRESTASHOP + ':' + API_KEY_PRESTASHOP)});
  }

}, {"Output-Format": "JSON", "Authorization" : "Basic " + btoa(API_KEY_PRESTASHOP + ':' + API_KEY_PRESTASHOP)});

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