Question

在python中有任何支持在mqtt代理上订阅端口8080

 import sys
 import paho.mqtt.client as mqtt

 def on_connect(mqttc, obj, flags, rc):
     print("rc: "+str(rc))

 def on_message(mqttc, obj, msg):
     print(msg.topic+" "+str(msg.qos)+" "+str(msg.payload))

 def on_publish(mqttc, obj, mid):
     print("mid: "+str(mid))

 def on_subscribe(mqttc, obj, mid, granted_qos):
     print("Subscribed: "+str(mid)+" "+str(granted_qos))

 def on_log(mqttc, obj, level, string):
     print(string)

 mqttc = mqtt.Client()   
 mqttc.on_message = on_message
 mqttc.on_connect = on_connect
 mqttc.on_publish = on_publish
 mqttc.on_subscribe = on_subscribe
 mqttc.connect("test.mosquitto.org", 8080, 60)
 mqttc.subscribe("test/iot", 0)

 mqttc.loop_forever()

我无法连接此代码。 Mosquitto在端口8080上有websocket支持，但是这个paho库不能用于它。任何python的解决方案？我在Windows 10上使用python 2.7。

Answer 1

Paho MQTT模块几天前引入了websocket支持。我认为它尚未发布，但您可以使用

从Linux分支机构下安装

function my_scripts_loader() {
    wp_enqueue_script('myjquerylib-js', get_template_directory_uri() . '/assets/js/myjquerylib.js');

}
add_action('wp_enqueue_scripts', 'my_scripts_loader');

也适用于Windows。（感谢评论中的信息）

您可以通过连接

将websockets用作传输

pip install git+git://github.com/eclipse/paho.mqtt.python.git

<强>更新

如果您尝试将websocket协议与python客户端一起使用，因为您还需要连接浏览器客户端（例如MQTT.js），那么您还可以配置mosquitto来监听 websockets 和正常 mqtt协议。

只需创建一个配置文件，例如

mqttc = mqtt.Client(transport="websockets")

具有以下内容：

/etc/mosquitto/mosquitto.conf

然后你可以用

运行mosquitto

listener 1883
protocol mqtt

listener 9001
protocol websockets

你应该看到类似的输出：

mosquitto -c /etc/mosquitto/mosquitto.conf

然后您的python客户端连接到端口1883，浏览器客户端连接到9001

您可以使用what-mqtt browser client来测试websocket侦听器。只需将其指向1469015320: mosquitto version 1.4.8 (build date 2016-05-3112:07:40+0200) starting 1469015320: Config loaded from /etc/mosquitto/mosquitto1.conf. 1469015320: Opening ipv4 listen socket on port 1883. 1469015320: Opening ipv6 listen socket on port 1883. 1469015320: Opening websockets listen socket on port 9001.

即可

Answer 2

2月到现在，paho.mqtt.python代码库已得到修复。只需添加transport='websockets'作为Fl0v0建议，它就可以了。以下是订阅$SYS/下所有内容或全部内容的完整代码。测试的代码在2016年6月3日的主分支上使用提交哈希e56f913。

#!/usr/bin/python

import sys
import paho.mqtt.client as mqtt

def on_connect(mqttc, obj, flags, rc):
    print("rc: "+str(rc))

def on_message(mqttc, obj, msg):
    print(msg.topic+" "+str(msg.qos)+" "+str(msg.payload))

def on_publish(mqttc, obj, mid):
    print("mid: "+str(mid))

def on_subscribe(mqttc, obj, mid, granted_qos):
    print("Subscribed: "+str(mid)+" "+str(granted_qos))

def on_log(mqttc, obj, level, string):
    print(string)

mqttc = mqtt.Client(transport='websockets')   
mqttc.on_message = on_message
mqttc.on_connect = on_connect
mqttc.on_publish = on_publish
mqttc.on_subscribe = on_subscribe

mqttc.connect("test.mosquitto.org", 8080, 60)

mqttc.subscribe("#", 0)
#mqttc.subscribe("$SYS/#", 0)

mqttc.loop_forever()

更新：通过从一个版本的Cygwin（不是cygwin python）调用，上面的代码在我测试过的带有python 2.7.6的Windows 7上不起作用。主题"#"或"$SYS/#"都没有给出任何已发布的消息。

相反，pub或sub到solid主题的工作方式如下所示。修补程序paho.mqtt.python examples/pub-single.py和examples/sub-simple.py。然后在一个终端中运行sub-simple.py。在另一个终端中运行pub-single.py两次。订户终端将打印出发布者发布的两条消息。

补丁到examples/pub-single.py：

-publish.single("paho/test/single", "boo", hostname="test.mosquitto.org")
+publish.single("/HelloWorld", "boo", hostname="test.mosquitto.org",
+               port=8080, transport='websockets')

补丁到examples/sub-simple.py：

-topics = ['#']
+topics = ['/HelloWorld']

-m = subscribe.simple(topics, hostname="iot.eclipse.org", retained=False, msg_count=2)
+m = subscribe.simple(topics, hostname="test.mosquitto.org",
+                         retained=False, msg_count=2,
+                         port=8080, transport='websockets')

Answer 3

不，Paho库的Python版本不支持基于Websockets的MQTT。

事实上，我认为唯一支持基于Websockets的MQTT的本机客户端（不在浏览器中）MQTT库是NodeJS模块（https://www.npmjs.com/package/mqtt）

在python中

3 个答案: