Javascript class 网络套接字过早停止执行

Question

我正在尝试构建一个 JavaScript class，它允许我通过网络套接字（ws 库）与我的 Home Assistant 服务器进行交互。脚本旨在 node.js环境。

const WebSocket = require('ws');

class HomeAssistantWebSocket {
  constructor(config = {}) {
    this.config = config;
    this.initialize();
  }

  config;
  initialized = false;
  initializeErrors = [];
  authenticated = false;
  ws = null;

  authenticate = () => {
    let {
      config,
      ws,
      serialize
    } = this;

    console.log("Attempting to authenticate...");
    ws.send(serialize({
      "type": "auth",
      "access_token": config["access_token"]
    }));
    return true;
  }

  openConnection = () =>  {
    let {
      ws
    } = this;

    ws.on('open', () => {
      console.log("Connection opened!");
    });

    ws.on('message', (data) => {
      this.handleMessage(data);
    });
  }

  deserialize = (string) => {
    try {
      return JSON.parse(string);
    } catch (error) {
      return false;
    }
  }

  handleMessage = (data) => {
    let {
      authenticate,
      deserialize,
      ws
    } = this;

    data = deserialize(data);
    console.log(data);

    if(data["type"] === "auth_required") {
      authenticate();      
    }
    if (data["type"] === "auth_ok" && !this.authenticated) {
      this.authenticated = true;
      console.log("Successfully authenticated");
    }
    if (data["type"] === "auth_ok") {
      ws.send(JSON.stringify({
        "id": 20,
        "type": "subscribe_events",
      }));
    }
  }

  initialize = () => {
    let {
      config,
      initialized,
      initializeErrors,
    } = this;

    if (Object.keys(config).length < 1) {
      initializeErrors.push("No config present.");
    } else if (!config.hasOwnProperty("access_token") && typeof config["access_token"] === "string") {
      initializeErrors.push("Config must contain a valid access_token.");
    } else if (!config.hasOwnProperty("home_assistant_url") && typeof config["home_assistant_url"] === "string") {
      initializeErrors.push("Config must contain a valid home_assistant_url");
    }

    if (this.initializeErrors.length === 0) {
      this.ws = new WebSocket(config["home_assistant_url"]);
      this.openConnection();
      initialized = true;
      console.log("Attempting to open connection...");
    } else {
      console.log("Failed to initialize:");
      this.initializeErrors.forEach((e) => {
        console.log(e);
      });
    }
    return true;
  }

  serialize = (json) => {
    try {
      return JSON.Stringify(json);
    } catch (error) {
      return false;
    }
  }

}

const haWS = new HomeAssistantWebSocket({
  "access_token": "redacted_access_token",
  "home_assistant_url": "ws://homeassistant.local:8123/api/websocket"
});

我运行遇到了一个问题，我的代码在身份验证阶段后停止执行。我的代码在控制台中打印以下内容，然后脚本停止执行。没有错误。

Connection opened!
{ type: 'auth_required', ha_version: '2021.2.3' }
Attempting to authenticate...

我已验证我的代码确实正确连接到网络套接字 api 并且正在与家庭助理服务器通信。有没有人看到我的代码有什么问题会导致脚本停止 execution/garbage 收集 ws on 消息以防止收到更多消息？

我有一个非常基本的示例，它在 class 之外按预期工作，使其通过身份验证阶段并保持套接字打开并按预期接收数据。任何帮助将不胜感激。

Answer 1

serialize = (json) => {
  try {
    return JSON.stringify(json);
  } catch (error) {
    return false;
  }
}

我在序列化函数中发现了问题。我对 JSON.stringify 函数的引用不正确。在我的代码中它是 JSON.Stringify。应该是 JSON.stringify.

总是小事...

Javascript class 网络套接字过早停止执行

Javascript class with web socket prematurely ceasing execution

javascript

node.js

ws

home-assistant