Add rate limit with Exponential Backoff

This commit is contained in:
MCHost
2025-07-03 01:13:54 -04:00
parent 96c6211222
commit 28d9d8aff5
3 changed files with 48 additions and 7 deletions

View File

@ -1,12 +1,40 @@
const express = require('express');
const { promisify } = require('util');
const { exec } = require('child_process');
const rateLimit = require('express-rate-limit');
const app = express();
const port = 3066;
require('dotenv').config();
const execPromise = promisify(exec);
// Custom key generator to support Cloudflare's CF-Connecting-IP header
const getClientIp = (req) => {
return req.headers['cf-connecting-ip'] || req.ip;
};
// Rate limiter configuration: 1 request per second with exponential backoff
const limiter = rateLimit({
windowMs: 1000, // 1 second
max: 1, // 1 request per IP
standardHeaders: true, // Return rate limit info in headers
legacyHeaders: false, // Disable X-RateLimit headers
keyGenerator: getClientIp, // Use CF-Connecting-IP or fallback to req.ip
handler: (req, res) => {
// Calculate backoff time (exponential, starting at 2 seconds)
const retryAfter = Math.pow(2, Math.min(req.rateLimit.current - req.rateLimit.limit, 5));
res.setHeader('Retry-After', retryAfter);
res.status(429).json({
error: 'Too many requests, please try again later.',
retryAfter: retryAfter
});
}
});
// Apply rate limiting to API routes only
app.use('/java', limiter);
app.use('/bedrock', limiter);
async function checkConnectionStatus(hostname, port) {
try {
const command = `${process.env.STATUS_CHECK_PATH} -host ${hostname} -port ${port}`;
@ -55,7 +83,7 @@ app.get('/bedrock/:host/:port', async (req, res) => {
const { host, port } = req.params;
try {
const result = await checkGeyserStatus(host, port);
console.log(result)
console.log(result);
res.json(result);
} catch (error) {
res.status(500).json({ isOnline: false, error: `Server error: ${error.message}` });