socket.io 服务器不断收到连接事件，但客户端从不连接

Question

I have the following code for client side in a node project

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

const socket = openSocket('http://localhost:2345');

console.log(socket.connected,socket.id)

socket.on('connect', function () { console.log('connect') });
socket.on('event', function (data) { console.log('event') });
socket.on('error', function (error) { console.log('error') });
socket.on('disconnect', function () { console.log('disconnect') });
socket.on('connection', (socket) => { console.log('connection') })
socket.on('fdaTrigger', (data) => { console.log('fdaTrigger') })

On the server side, I have socket.io running on port 2345

const io = require('socket.io')(server, {
  perMessageDeflate: false,
  pingInterval: 10000,
  pingTimeout: 5000,
});
var debug = require('debug')('socket.io');
var assetCounter = -1;
io.on('connection', function (socket) {
  assetCounter = -1;
  debug('Started');
  console.log('Got a connection', socket.connected, socket.id);
})

The connection event is fired every few seconds on server but my client refuses to connect. When I stop running the client code, the connections stop, so it's connecting but client side does not connect. Any insight would be appreciated.

Answer 1

Try Below Code

Client Side

const openSocket = require('socket.io-client');
const socket = openSocket('http://localhost:2345', {transports: ['websocket']});
setTimeout(() => {
  console.log(socket.connected,socket.id)
}, 100)
socket.on('connect', function () { console.log('connect') });
socket.on('event', function (data) { console.log('event') });
socket.on('error', function (error) { console.log('error') });
socket.on('disconnect', function () { console.log('disconnect') });
socket.on('connection', (socket) => { console.log('connection') })
socket.on('fdaTrigger', (data) => { console.log('fdaTrigger') })

Server Side

const server = require("http").createServer(app);
const io = require('socket.io')(server, {
   perMessageDeflate: false,
   pingInterval: 10000,
   pingTimeout: 5000,
});
var debug = require('debug')('socket.io');
var assetCounter = -1;
io.on('connection', function (socket) {
   assetCounter = -1;
   debug('Started');
   console.log('Got a connection', socket.connected, socket.id);
})
const port = 2345;
server.listen(port, () => console.log(`Listening on port ${port}`));