CODEWITHSUNDEEP
node.jsreactjsexpresssocketssocket.io
Darkpsinight
Darkpsinight

Reputation: 659

socket.io - Failed to load resource: net::ERR_CONNECTION_REFUSED

I'm building a forum where two users after connections can post a status then comment on them. For comments, i used socket.io .

In console i'm getting this error each few seconds :

Failed to load resource: net::ERR_CONNECTION_REFUSED
GET http://localhost/socket.io/?EIO=4&transport=polling&t=O05nump net::ERR_CONNECTION_REFUSED

How to fix this error ?

I installed express, nodemon and socket.io in my socket server:

package.json

{
"name": "socket",
"version": "1.0.0",
"description": "",
"main": "app.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
  "express": "^4.17.3",
  "nodemon": "^2.0.15",
  "socket.io": "^4.4.1"
  }
}

app.js

const io = require("socket.io")(4000, {
cors: {
    origin: "http//localhost:3000",
},
});


io.on('connection', (socket) => {
  console.log('A new user is connected !');
})
io.on('disconnect', () => {
  console.log('User has left !');
});

Also, i installed socket.io-client in client (front), then in my web page, i added this code :

import { io } from 'socket.io-client'
export default () => {

  //implement socket
  const socket = useRef()

  useEffect(() => {
      socket.current = io("ws://localhost/4000")
  }, [])

return (
  //some html code
)
}

Project Forum

├── back     
├── client
   └──index.jsx
└── socket
   └──package.json
   └──app.js

Upvotes: 1

Views: 3977

Answers (2)

Serap
Serap

Reputation: 1

const socketio = require("socket.io");
const express = require("express");
const http = require("http");
const app = express();

const PORT = process.env.PORT || 2018;

const server = http.createServer(app);

const io = socketio(server, {
  cors: {
    origin: "*",
    methods: ["GET", "POST", "OPTIONS"]
  }
});

server.listen(PORT, () => {
  io.on("connection", socket => {
    console.log("ok");
    console.log(socket.id);
    // io.in(roomID).emit()
    socket.emit("WELCOME_MESSAGE", ` ${socket.id} welcome!! `);
  });
});

Upvotes: 0

Alexandru DuDu
Alexandru DuDu

Reputation: 1044

You added a slash instead of semi-colon:
socket.current = io("ws://localhost:4000")

Upvotes: 1

Related Questions