eclipse paho 中的 MQTT 无法连接
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MQTT in paho can't connect in connection
提问by user824624
I am trying to use the MQTT javascript client from Paho. I see a example from HiveMQ, you can check it here - - http://www.hivemq.com/demos/websocket-client/
我正在尝试使用 Paho 的 MQTT javascript 客户端。我看到一个来自 HiveMQ 的例子，你可以在这里查看 - - http://www.hivemq.com/demos/websocket-client/
It seems to be working, however when I set the host as: test.mosquitto.org:1883, which is a mqtt broker service at mosquitto, it fails.
它似乎正在工作，但是当我将主机设置为：时test.mosquitto.org:1883，它是 mosquitto 的 mqtt 代理服务，它失败了。
When I tried to connect to this mosquitto service, it gives me a error on connection - connect failed: AMQJS0007E, Socket error: undefined.
当我尝试连接到这个 mosquitto 服务时，它给了我一个连接错误 - connect failed: AMQJS0007E, Socket error: undefined.
回答by hardillb
Mosquitto does not support MQTT over WebSockets out of the box. So Roger is using lighttpd with the mod_websocket module to forward.
Mosquitto 不支持开箱即用的基于 WebSocket 的 MQTT。所以 Roger 使用了带有 mod_websocket 模块的 lighttpd 来转发。
This means that the port will be port 80 not 1883
这意味着端口将是端口 80 而不是 1883
But having just had a quick look at http://test.mosquitto.org/ws.htmlit seams that the lighttpd instance may be down at the moment as the demo is not working.
但是刚刚快速浏览了http://test.mosquitto.org/ws.html，可以看出 lighttpd 实例目前可能已关闭，因为演示无法正常工作。
If you want to run your own local copy of mosquitto for testing there is a link on that page with instructions on how to build mod_websocket for lighttpd or a ubuntu ppa to download it from.
如果您想运行自己的 mosquitto 本地副本进行测试，该页面上有一个链接，其中包含有关如何为 lighttpd 或 ubuntu ppa 构建 mod_websocket 的说明以从中下载它。
回答by ralight
As hardillb says, you need to use port 80. The full url you should use is
正如hardillb所说，您需要使用端口80。您应该使用的完整网址是
ws://test.mosquitto.org/mqtt
ws://test.mosquitto.org/mqtt
If you are using m2m.eclipse.org as Andy suggests (which is actually using apache with websockets support) then you should use
如果您按照安迪的建议使用 m2m.eclipse.org（实际上是使用具有 websockets 支持的 apache），那么您应该使用
ws://m2m.eclipse.org/ws
ws://m2m.eclipse.org/ws
回答by Andy Piper
You could try the same thing against m2m.eclipse.org which I think has websocket support switched on via lighthttpd as well.
你可以对 m2m.eclipse.org 尝试同样的事情，我认为它也通过 lighthttpd 开启了 websocket 支持。
