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我像这样使用 aedes 创建服务器:

const aedes = require('aedes')()
const httpServer = require('http').createServer()
const ws = require('websocket-stream')
const port = 8888

ws.createServer({ server: httpServer }, aedes.handle)

httpServer.listen(port, function () {
  console.log('websocket server listening on port ', port)
})

这段代码在端口 8888 上运行正常。在 Reactjs 中使用 mqtt-react-hooks 之后,我创建了文件:

import React from 'react';

import { Connector } from 'mqtt-react-hooks';
import { useMqttState } from 'mqtt-react-hooks';

export default function App() {
const { connectionStatus } = useMqttState();
  return (
    <Connector brokerUrl="mqtt://domain.com:8888">
        <h1>{`Status: ${connectionStatus}`}</h1>
    </Connector>
  );
}

发生错误:它显示状态:未定义。网络损坏和超载。我尝试在网络浏览器上通过 websocket 使用 MQTT,所以需要另一个设置吗?

更新:我使用 tls,所以它必须与密钥、证书、ca 一起使用。使用上面的代码,浏览器发送状态强制使用 wss。我更改服务器文件如下:

const fs = require('fs');
const aedes = require('aedes')();
var wsSslPort = 8888;
var ws = require('websocket-stream');
// WsSsl server
var wsSslServer = require('https').createServer({
    key: fs.readFileSync("cert/key.pem"),
    cert: fs.readFileSync("cert/crt.pem"),
    requestCert: false, // client send their certificate
    rejectUnauthorized: false,
    ca: [ fs.readFileSync("cert/ca.ca") ]
}, aedes.handle);

wsSslServer.listen(wsSslPort, "domain.com", function () {
  console.log('MQTT websocket tls server listening on port', wsSslPort)
});

此代码运行正常。

我还更改了客户端文件:

    import React from 'react'; 
    var optionsMqtt={
      clientId: uuidv4(),
      rejectUnauthorized : false,
      ca: cert_mqtt.ca_mqtt,
      key: cert_mqtt.key_mqtt,
      cert: cert_mqtt.crt_mqtt
    }
    const websocketUrl = "wss://domain.com:8888";
    export default function App() {
      const client = mqtt.connect(websocketUrl,optionsMqtt);
      client.stream.on("error", (err) => {
        console.log(`Connection to ${websocketUrl} failed`);
        client.end();
      });
    client.on('connect', function () {
      console.log('Connected');
    });
    return (
        <>
            <h1>TEST</h1>
        <>
      );
    }

仍然错误:

ws.js:108 WebSocket 连接到“wss://domain.com:8888/”失败:连接建立错误:net::ERR_CONNECTION_REFUSED

我也关闭了防火墙,打开了8888端口。

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1 回答 1

2

mqtt://您已通过使用URL 中的模式明确告诉客户端使用本机 MQTT 。

将其更改为ws://

于 2021-05-18T06:51:02.483 回答