title: Downloaded filename with Google App Engine Blobstore
body: <p>I'm using the Google App Engine Blobstore to store a range of file types (PDF, XLS, etc) and am trying to find a mechanism by which the original filename of the uploaded file - as stored in blob_info - can be used to name the downloaded file i.e. so that the user sees 'some_file.pdf' in the save dialogue rather than 'very_long_db_key.pdf'.</p>
  
  <p>I can't see anything in the docs that would allow this:</p>
  
  <p><a href="http://code.google.com/appengine/docs/python/blobstore/overview.html">http://code.google.com/appengine/docs/python/blobstore/overview.html</a></p>
  
  <p>I've seen hints in other posts that you could use the information in blob_info to set the content-disposition header. Is this the best approach to achieving the desired end?</p>