title: Javascript: Uploading a file... without a file
body: <p>I am trying to fake a file upload without actually using a file input from the user. The file's content will be dynamically generated from a string.</p>
  
  <p>Is this possible? Have anyone ever done this before? Are there examples/theory available?</p>
  
  <p>To clarify, I know how to upload a file using AJAX techniques using a hidden iframe and friends - the problem is uploading a file that is not in the form.</p>
  
  <p>I am using ExtJS, but jQuery is feasible as well since ExtJS can plug into it (ext-jquery-base).</p>