Websocket 关闭代码：1006 Node Android okhttp3 AmazonEc2答案

【问题标题】：Websocket closed code: 1006 Node Android okhttp3 AmazonEc2Websocket 关闭代码：1006 Node Android okhttp3 AmazonEc2
【发布时间】：2020-09-06 16:28:58
【问题描述】：

我在使用 Websocket ws is closed with code: 1006 reason:时遇到问题

环境

Amazon EC2 Instance  : t2.micro Ubuntu 18.04
Node : v12.16.3
Websocket : https://github.com/websockets/ws : 7.3.0
MongoDb : shell version v4.2.6
MongoDriver : NodeJs 3.5.7
Okhhtp3 : implementation 'com.squareup.okhttp3:okhttp:4.6.0'

我正在从 Websockets -> MongoDb 获取数据并尝试填充到回收站视图中。如果我执行 log.d，数据会很好，但是当我填充到回收器视图时 - 它在应用程序启动时运行良好，并且在开始活动时再运行一次，但之后我开始收到 1006 错误。

NodeJs（服务器）

// Websocket variables
const WebSocket = require('ws');
const wss = new WebSocket.Server({ port: 8000 });
console.log('Websocket active on port 8000...');

// Connect To Mongo
MongoClient.connect(url, { useUnifiedTopology: true, authSource: 'admin' }, function (err, client) {
    if (err) {
        throw err;
    }

    const db = client.db(dbName);

    // New Connection
    wss.on('connection', function connection(ws) {

        // Message Received
        ws.on('message', function incoming(message) {

            // Json Parse String To Access Child Elements
            var iJson = JSON.parse(message);
            const c = db.collection('chats');
            c.find({ "owner": iJson.owner_id }).toArray(function (err, docs) {
                ws.send(JSON.stringify(docs));
            });
        });

        // Connection Closed
        ws.on('close', function close(code, reason) {
            console.log('ws is closed with code: ' + code + ' reason: ' + reason);
        });
    });
});

Android（客户端）

private WebSocket webSocket;

// Initiate The Socket Connection
private void initiateSocketConnection() {

    OkHttpClient client = new OkHttpClient();
    Request request = new Request.Builder().url(WebSocketClient.SERVER_PATH).build();
    webSocket = client.newWebSocket(request, new SocketListener());

}

// Private WebSocketListener Class
private class SocketListener extends WebSocketListener {

    public SocketListener() {
        super();
    }

    @Override
    public void onClosed(@NotNull WebSocket webSocket,
        int code,
        @NotNull String reason) {
        super.onClosed(webSocket,
            code,
            reason);

        Log.d("TAG",
            "onClosed: " + code + "-" + reason);

    }

    @Override
    public void onFailure(@NotNull WebSocket webSocket,
        @NotNull Throwable t,
        okhttp3.@org.jetbrains.annotations.Nullable Response response) {
        super.onFailure(webSocket,
            t,
            response);
    }

    @Override
    public void onMessage(@NotNull WebSocket webSocket,
        @NotNull String text) {
        super.onMessage(webSocket,
            text);

        String chat = "{\"chat\":" + text + "}";

        Log.d("TAG",
            "onMessage: " + chat);

        lIndividualChatList.clear();

        try {
            JSONObject jsonObject = new JSONObject(chat.trim());

            // Check If User Array Has Anything
            JSONArray returnArray = jsonObject.getJSONArray("chat");

            for (int l = 0; l < returnArray.length(); l++) {
                if (returnArray.length() > 0) {

                    // Get The Json Object
                    JSONObject returnJSONObject = returnArray.getJSONObject(l);

                    // Get Details
                    String owner = returnJSONObject.optString("owner");
                    lIndividualChatList.add(new IndividualListModel(owner));
                }
            }

            // Use The Adapter To Populate The Recycler View
            aIndividualChatList = new IndividualListAdapter(lIndividualChatList);
            rvList.setAdapter(aIndividualChatList);

            aIndividualChatList.notifyDataSetChanged();

        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onOpen(@NotNull WebSocket webSocket,
        okhttp3.@NotNull Response response) {
        super.onOpen(webSocket,
            response);
    }
}

【问题讨论】：

为帮助解决此问题，请设置ws.on('error',...) 事件处理程序。你有什么有趣的事情吗？
ws.on('error', function(e) { console.log("错误发生" +e); });不开火
@O.Jones 解决了感谢您指出记录更多错误，我在服务器和客户端记录了尽可能多的错误...谢谢

标签： android node.js amazon-web-services websocket okhttp

【解决方案1】：

奇怪的部分是它在失败之前工作了一两次，这导致了混乱。如果它总是失败并喜欢一个本来不错的 logcat。最好的方法是在服务器和客户端上记录所有可能的错误/故障并查看消息。

在失败时首先将日志放入内部

@Override
public void onFailure(@NotNull WebSocket webSocket, @NotNull Throwable t, okhttp3.@org.jetbrains.annotations.Nullable Response response) {
    super.onFailure(webSocket, t, response);

    Log.d("TAG", "websocket failure: " + t + response);
}

这给出了以下信息：

: `websocket failure: android.view.ViewRootImpl$CalledFromWrongThreadException: 
Only the original thread that created a view hierarchy can touch its views.null`

然后将recycler view的population包裹在这个

getActivity().runOnUiThread(new Runnable() {
public void run() {

  // Poplulate the recycler view here....

}

【讨论】：