title: Is it possible to attach file in POST Json?
body: <p>I have a heap of data in format JSON(Serialized object).
  I send this data to server by <code>POST</code> method with header: <code>Content-Type: application/json</code>.</p>
  
  <p>Is it possible to attach file to body request and send at once. Or JSON data sugggests sending only text data?</p>