[Node.js] Create a program that receives data from websockets on the Network tab of Chrome developer tools on a specific home page

Hello.

I'm posting a question like this because I got curious while writing the current program.

If you go to Chrome Developer Tools -> Network tab on a specific homepage, you can find information related to the web socket, so I'm writing a program that receives it as Node.js.

on the General tab of the Header Request URL: wss://(url):(port)/socket.io/?streams=(streams)&EIO=(EIO)&transport=websocket&sid=(sid)
It says so, so I'm writing a program with wss://(url):(port)/ as the url criterion. Also on the Query String Parameters tab, parentheses are provided above streams: (streams)
EIO: (EIO)
transport: websocket
sid: (sid)
Contains values.

Below is the program I wrote.

const socket = require('socket.io-client');

let url = 'wss://(url):(port)';
let io = socket.connect(url);

io.on('connect',(err)=>{
    console.log('Connect!');
    io.send({
        query:{
            'path': '/socket.io',
            'streams': (streams),
            'EIO': (EIO),
            'transport': 'websocket',
            'sid': (sid)
        }
    });
});

io.on('error',(error)=>{
    console.log('err: ',error);
});

io.on('message',(data)=>{
    console.log(data);
});

I thought the contents of the message would come out in io.on('message') because the contents of the message were stacked on the Frames tab on the web socket, but the contents did not come out and only the error kept coming out.

Below is the error content.

err:  { Error: xhr post error
    at XHR.Transport.onError (G:\dev\js\bsx\node_modules\engine.io-client\lib\transport.js:64:13)
    at Request.<anonymous> (G:\dev\js\bsx\node_modules\engine.io-client\lib\transports\polling-xhr.js:109:10)
    at Request.Emitter.emit (G:\dev\js\bsx\node_modules\component-emitter\index.js:133:20)
    at Request.onError (G:\dev\js\bsx\node_modules\engine.io-client\lib\transports\polling-xhr.js:309:8)
    at Timeout._onTimeout (G:\dev\js\bsx\node_modules\engine.io-client\lib\transports\polling-xhr.js:256:18)
    at ontimeout (timers.js:498:11)
    at tryOnTimeout (timers.js:323:5)
    at Timer.listOnTimeout (timers.js:290:5) type: 'TransportError', description: 403 }

I couldn't understand the error because only the contents related to Ajax and jquery came out.

I would really appreciate it if you could tell me what went wrong. ㅠ<

node.js websocket socket.io

2022-09-22 19:57