def get(self):
sites_data = Site.query().fetch(keys_only=True)
sites_data = ndb.get_multi(sites_data)
context = {'data': sites_data}
content = self.jinja2.render_template('sites.html', **context)
self.response.headers.add_header('Access-Control-Allow-Origin', '*')
self.response.write(content)
