websocket readyState 0(连接)

Question

我正在尝试实现一个简单的web套接字应用程序。

const WebSocket = require("ws");

class SocketService {
  async connectService() {
    try {
      this.socket = await new WebSocket("wss://localhost:3000/", {
        origin: "https://localhost:3000",
        rejectUnauthorized: false,
      });
      return this.socket;
    } catch (err) {
      console.log(err);
      process.exit(0);
    }
  }

  async sendMessage() {
    try {
      await this.socket.send("test 123");
    } catch (err) {
      console.log(err);
      process.exit(0);
    }
  }
}

module.exports = new SocketService();

"use strict";

// Create an instance of a ws client
const socketService = require("./wss_client");

// Connect websocket
(async () => {
  try {
    // connectService works
    await socketService.connectService();
   // sendMessage doesn't work
    await socketService.sendMessage();    
    });

  } catch (err) {
    // err
  }
})();

但是当调用socketService.sendMessage()时，我会得到这个erorr。

错误: WebSocket未打开: readyState 0(连接)

有人能帮我找出我做错了什么吗。一如既往地提前感谢。

Answer 1

尝试一种callBack方法：

private async connectToWs(callback) {
    try {
        this.websocket = await new WebSocket(WIDGET_URL as string);
        this.websocket.onopen = callback;
        this.websocket.onerror = console.error;
        return this.websocket
    } catch (error) {
        console.error(error.message)
    }
}

"onopen“回调将跳闸发送：

await this.connectToWs(async () => await this.websocket.send(JSON.stringify(Entries)));