GZip Compression using Rails

application.rb

  after_filter :compress
  def compress
    if self.request.env['HTTP_ACCEPT_ENCODING'] and self.request.env['HTTP_ACCEPT_ENCODING'].match(/gzip/)
      if self.response.headers["Content-Transfer-Encoding"] != 'binary'
        begin
          ostream = StringIO.new
          gz = Zlib::GzipWriter.new(ostream)
          gz.write(self.response.body)
          self.response.body = ostream.string
          self.response.headers['Content-Encoding'] = 'gzip'
        ensure
          gz.close
        end
      end
    end
  end