Question

我已经实现了一个角度的paho mqtt，用于来自AWS IOT主题的实时数据流。数据在桌面浏览器和android webview中出现。我还处理了网络断开连接和重新连接或aws身份验证令牌过期的情况。

这一切都在桌面浏览器上工作，网络断开连接停止数据更新，同时重新连接再次发送数据到页面。但是，断开并重新连接网络后，andoid webview无法将数据发送到页面。

这是mqtt连接的角度代码。

initClient(requestUrl: string) {
    const clientId = String(Math.random()).replace('.', '');

    const client = new Paho.MQTT.Client(requestUrl, clientId);

    const that = this;
    const connectOptions = {
        onSuccess: function () {
            console.log('connected');
            // subscribe to the topic
            client.subscribe('topicname', {});
        },
        useSSL: true,
        keepAliveInterval: 60 * 60,
        timeout: 10,
        mqttVersion: 4,
        onFailure: function (err: any) {
            that.isError = true;
            console.log(err);
            console.error('connect failed' + err);
        }
    };

    client.onConnectionLost = (responseObject: any) => {
        if (responseObject.errorCode !== 0) {
            console.log(' onConnectionLost:' + responseObject.errorCode + ' -- ' + responseObject.errorMessage);
            that.authenticateAWS();
        }
    };

    client.connect(connectOptions);
    // this.locations = [];

    // let i = 0;
    // setInterval(() => this.processMessage({ "payloadString" : this.testdata(i++)}), 10000);
    client.onMessageArrived = (message) => {
        this.processMessage(message);
    };
  }

我可以通过webview apis在android logcat上获得以下控制台错误。

[INFO:CONSOLE(1)] " onConnectionLost:8 -- AMQJS0008I Socket closed.", source: http://PAGEURL/vendor.hash.bundle.js (1)
[INFO:CONSOLE(1)] "WebSocket connection to 'wss://IOTURL' failed: Error in connection establishment: net::ERR_INTERNET_DISCONNECTED", source: http://PAGEURL/main.hash.bundle.js (1)
[INFO:CONSOLE(1)] "[object Object]", source: http://PAGEURL/vendor.hash.bundle.js (1)
[INFO:CONSOLE(1)] "connect failed[object Object]", source: http://PAGEURL/vendor.hash.bundle.js (1)

此后数据流在webview中停止。

但桌面浏览器在重新连接并继续数据传输后才会出现以下错误。

onConnectionLost:8 -- AMQJS0008I Socket closed.

更新：桌面Firefox浏览器也无法重新连接以下错误。

The connection to wss://IOTURL was interrupted while the page was loading.
onConnectionLost:7 -- AMQJS0007E Socket error:undefined.

在android webview上重新连接网络后，网络套接字连接没有重新连接

0 个答案: