new attempt from scratch

backend/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "backend",
+  "version": "1.0.0",
+  "description": "chat room app backend",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "sankhadip roy",
+  "license": "ISC",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.19.2",
+    "socket.io": "^4.7.5"
+  }
+}

backend/server.js

@@ -0,0 +1,34 @@
+const express = require('express')
+const app = express();
+const http = require("http");
+const cors = require('cors');
+const { Server } = require("socket.io");
+
+app.use(cors());
+
+const server = http.createServer(app);
+const io = new Server(server, {
+    cors: {
+        origin: 'http://localhost:5173',
+        methods: ['GET', 'POST'],
+    },
+});
+
+io.on("connection", (socket) => {
+    console.log(`User connected ${socket.id}`);
+
+    // Handle 'send_message' event
+    socket.on('send_message', (data) => {
+        console.log(`Received message: ${data.message}`);
+        // Broadcast the message to all connected clients
+        io.emit('recive_message', data);
+    });
+
+    socket.on('disconnect', () => {
+        console.log('User disconnected');
+    });
+});
+
+server.listen(3001, () => {
+    console.log(`Example app listening on port 3001`);
+});