MQTT 版本 5 在 paho.mqtt.golang 中发布属性？

Question

我正在查看 MQTT v5 差异并注意到“header”信息可以在具有用户属性的消息的 body 之外发布。 paho.mqtt.golang 对此有支持吗？查看Publish功能，只支持client.Publish(topic, qos, retain, message_bytes).

Answer 1

paho.mqtt.golang only supports MQTT 3/3.1. If you want properties, which were introduced in v5, take a look at paho.golang which is a total rewrite that supports MQTT v5 (and v5 only). Support for properties is demonstrated in the chat example:

pb := &paho.Publish{
            Topic:   *topic,
            QoS:     byte(*qos),
            Payload: []byte(message),
            Properties: &paho.PublishProperties{
                User: map[string]string{
                    "chatname": *name,
                },
            },
        }

请注意，paho.golang is fairly stable it does not offer the same level of functionality as paho.mqtt.golang (for example persistence; see this issue 了解更多信息）。

MQTT 版本 5 在 paho.mqtt.golang 中发布属性？

MQTT version 5 publish properties in paho.mqtt.golang?

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mqtt

paho