Javascript Sencha触摸获取响应标题

我想在存储加载后获取响应头。我正在这样装我的商店

var storectn = Ext.getStore('Contactsstore');
storectn.loadPage(1,{
                    callback: function (records, operation, success, response) {
                        if (success==1) {
                           // Ext.Msg.alert('success');
                           // console.log('response contact api',response);
                           //var responseheader =  response.getResponseHeader('Content-Type');
                            //console.log('response header',responseheader);
                        } else {

                             var responsestatus = operation.error['status'];
                             Ext.Viewport.setMasked(false);


                        }
                    }
                });

但我在加载我的存储后没有收到响应，响应变量在我的控制台中打印为未定义

我试过这个

var Location = response.getResponseHeader();

---

但是没有得到回复，请帮我解决这个问题，谢谢

我已经按照以下方式解决了这个问题

var storectn = Ext.getStore('Contactsstore');
storectn.loadPage(1,{
                    callback: function (records, operation, success) {
                        if (success==1) {
                           console.log(operation.getResponse())
                            console.log(operation.getResponse().getResponseHeader('content-type')) // here i will get the response header
                        } else {

                             var responsestatus = operation.error['status'];
                             Ext.Viewport.setMasked(false);


                        }
                    }
                });

谢谢