index.js

import SocketManager from "./socketManager";

import http from "http";
import express from "express";
import cors from "cors";
import path from "path";
import SocketIO from "socket.io";
import helmet from "helmet";
import compression from "compression";
import dotenv from "dotenv";
import { RateLimiterMemory } from "rate-limiter-flexible";

dotenv.config();

const app = express();
const server = http.createServer(app);
const io = SocketIO(server, {
	path: "/api",
	serveClient: false,
	cookie: false
});

const rateLimiter = new RateLimiterMemory({
	points: 5,
	duration: 1,
	blockDuration: 600
});

const rateLimiterMiddleware = async (req, res, next) => {
	try {
		await rateLimiter.consume(req.connection.remoteAddress);
		next();
	} catch (error) {
		res.status(429).send("Too many requests. Please try again later.");
	}
};

server.listen(process.env.PORT || 3001, () => {
	const { port } = server.address();
	console.log(`${new Date().toUTCString()} Server: Listening on port ${port}.`);
	SocketManager(io);
});

app.use(compression());
app.use(rateLimiterMiddleware);
app.use(helmet());

if (process.env.NODE_ENV === "development") {
	app.use(cors({ origin: process.env.CLIENT_URL }));
} else {
	app.use(express.static(path.join(__dirname, "client/dist")));

	app.get("*", (req, res) => {
		res.sendFile(path.join(__dirname, "client/dist", "index.html"));
	});
}