title: ExtJS4 File upload - How the get my file content not just the location
body: <p>I know how to create a form that browses and selects a file, that's not my question. What I need is to get the content of the selected file, to send it to a server and proccess it. For now I only can get the file location.</p>
  
  <p>I think it will be better if I get my file on client side (extjs), then send it to server, but I have no idea how to do this.</p>
  
  <pre><code>{
      xtype: 'fileuploadfield',
      hideLabel: true,
      emptyText: 'Select a file to upload...',
      id: 'upfile',
      //name:'file',
      width: 220
  },
  buttons:
  [
      {
          text: 'Upload',
          handler: function () {
              obj.Import(Ext.getCmp('upfile').getValue())
          }
      }
  ]
  </code></pre>
  
  <p><code>Import(...)</code> is my server function. I need to give it the file not only its path!!</p>
  
  <p>Thank you in advance for your time</p>