title: How to stream big files (like CSV/XML) in rails 3.1?
body: <p>In Rails 3.0 it was possible to stream big files, like CSV or XML, with the self.response_body hack.</p>
  
  <p>Rails 3.1 killed this feature and added streaming. Only that streaming doesn't seem to work, or there isn't documentation on how to send large files. I tried with partials, without partials, with html.erb view instead of csv.erb, and nothing works.</p>
  
  <p>How can you stream large files in rails 3.1?</p>