limiter.js/dist/core/RateLimiter.js

limiter.js is a Node.js/TypeScript library that provides simple Rate limiter protection for Express applications. It tracks requests per IP address and enforces rate limits within a sliding time window. If an IP exceeds the allowed requests, limiter.js ca

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RateLimiter = void 0;
class RateLimiter {
    constructor(windowMs, maxHits) {
        this.windowMs = windowMs;
        this.maxHits = maxHits;
    }
    shouldBlock(ipTracker) {
        const hitCount = ipTracker.getHitCountInWindow(this.windowMs);
        return hitCount >= this.maxHits;
    }
    shouldBanPermanently(ipTracker, permanentBanThreshold) {
        if (permanentBanThreshold === undefined) {
            return false; // no permanent ban threshold set
        }
        // check if IP is already permanently banned
        if (ipTracker.getIsPermanentlyBanned()) {
            return false; // already permanently banned, no need to ban again
        }
        const hitCount = ipTracker.getHitCountInWindow(this.windowMs);
        const banCount = ipTracker.getBanCount();
        // Permanent ban if current hits exceed threshold OR if IP has been banned multiple times
        return hitCount >= permanentBanThreshold || banCount >= 3; // Ban permanently after 3 temporary bans
    }
    getWindowMs() {
        return this.windowMs;
    }
    getMaxHits() {
        return this.maxHits;
    }
}
exports.RateLimiter = RateLimiter;