url: 'localhost:8084/Calk/j_spring_security_check',
   params: {j_username: 'ali', j_password: '123456',
   method: 'POST',
   headers: {
      'Content-Type': 'application/x-www-form-urlencoded'
   },
   success: ...,
   faiulure: ...,
});

Ext.define('Calk.store.Calk', {
   extend: '...',
   model: '...',
   proxy: {
      type: 'ajax',
      url: 'localhost:8084/Calk/calk/all',
      withCredentials: true,
      useDefaultXhrHeader: false,
      reader: ...,
      method: 'POST'
});