def get(self, name):
a_obj = Photo.get_by_key_name(name)
if a_obj and a_obj.content:
self.header['Content-Type'] = "image/png"
self.header['Cache-Control'] = "max-age=172800, public, must-revalidate"
self.header['Expires'] = avatar_expires()
self.write(a_obj.content)
else:
self.error(404)
