gistfile1.py

class Tile(webapp.RequestHandler):
  def post(self):
    self.get()
 
  def get(self):
    url = self.request.path_info
    png_data = TileService.get_png_tile(url)
    if png_data:
      self.response.headers['Content-Type'] = 'image/png'
      self.response.out.write(png_data.getvalue())        
    else:
      return 200