我正在使用Redis以及我的Tornado应用程序与asyc客户端Brukva,当我查看Brukva站点上的示例应用程序时,他们正在websocket中的“ init ”方法上建立新连接
class MessagesCatcher(tornado.websocket.WebSocketHandler):
def __init__(self, *args, **kwargs):
super(MessagesCatcher, self).__init__(*args, **kwargs)
self.client = brukva.Client()
self.client.connect()
self.client.subscribe('test_channel')
def open(self):
self.client.listen(self.on_message)
def on_message(self, result):
self.write_message(str(result.body))
def close(self):
self.client.unsubscribe('test_channel')
self.client.disconnect()
在websocket的情况下很好但是如何在常见的Tornado RequestHandler post方法中处理它说长轮询操作(发布 - 订阅模型) 。 我在更新处理程序的每个post方法中创建新的客户端连接这是正确的方法吗? 当我在redis控制台上检查时,我看到每个新的post操作都会增加客户端。
这是我的代码示例。
c = brukva.Client(host = '127.0.0.1')
c.connect()
class MessageNewHandler(BaseHandler):
@tornado.web.authenticated
def post(self):
self.listing_id = self.get_argument("listing_id")
message = {
"id": str(uuid.uuid4()),
"from": str(self.get_secure_cookie("username")),
"body": str(self.get_argument("body")),
}
message["html"] = self.render_string("message.html", message=message)
if self.get_argument("next", None):
self.redirect(self.get_argument("next"))
else:
c.publish(self.listing_id, message)
logging.info("Writing message : " + json.dumps(message))
self.write(json.dumps(message))
class MessageUpdatesHandler(BaseHandler):
@tornado.web.authenticated
@tornado.web.asynchronous
def post(self):
self.listing_id = self.get_argument("listing_id", None)
self.client = brukva.Client()
self.client.connect()
self.client.subscribe(self.listing_id)
self.client.listen(self.on_new_messages)
def on_new_messages(self, messages):
# Closed client connection
if self.request.connection.stream.closed():
return
logging.info("Getting update : " + json.dumps(messages.body))
self.finish(json.dumps(messages.body))
self.client.unsubscribe(self.listing_id)
def on_connection_close(self):
# unsubscribe user from channel
self.client.unsubscribe(self.listing_id)
self.client.disconnect()
如果您提供类似案例的示例代码,我将不胜感激。