PubSubClient

基于 PubSubHub 的会话级门面（facade）。

该客户端将所有发布/订阅（pub/sub）操作绑定到同一个会话 ID，调用方因此无需在每次调用时显式传入自己的会话标识，即可发布和订阅消息。

方法

名称	类型	默认值	说明
send_all	—	—	Broadcasts a global message to all sessions. Args: message: Payload to publish.
send_all_on_topic	—	—	Broadcasts a topic message to all subscribers of topic. Args: topic: Topic name to publish on. message: Payload to publish.
send_others	—	—	Broadcasts a global message to all sessions except this client session. Args: message: Payload to publish.
send_others_on_topic	—	—	Broadcasts a topic message excluding this client session. Args: topic: Topic name to publish on. message: Payload to publish.
subscribe	—	—	Subscribes this session to global messages. The handler is invoked with one positional argument: message. Args: handler: Sync or async callback for global messages.
subscribe_topic	—	—	Subscribes this session to a topic. The handler is invoked with two positional arguments: (topic, message). Args: topic: Topic name to subscribe to. handler: Sync or async callback for topic messages.
unsubscribe	—	—	Removes global subscriptions for this session.
unsubscribe_topic	—	—	Removes this session's subscriptions for a specific topic. Args: topic: Topic to unsubscribe from.
unsubscribe_all	—	—	Removes all global and topic subscriptions for this session.