import java.util.HashMap;

import java.util.Map;

import java.util.concurrent.ConcurrentHashMap;

import java.util.concurrent.atomic.AtomicInteger;

public class SessionCookieValidator {

private static final int MAX_REQUESTS_PER_MINUTE = 100; // Rate limit

private static final Map<String, AtomicInteger> requestCounts = new ConcurrentHashMap<>(); // Track requests per host

private static final Map<String, Long> lastRequestTimes = new ConcurrentHashMap<>(); // Track last request time

public static boolean validateSessionCookie(String requestHost, String sessionCookie) {

// Get current time

long currentTime = System.currentTimeMillis();

// Check rate limit

if (requestCounts.containsKey(requestHost)) {

long lastTime = lastRequestTimes.get(requestHost);

if (lastTime != null && currentTime - lastTime < 60000) { // 60000ms = 1 minute

// Rate limit exceeded

return false;

}

}

// Update request count and last request time

requestCounts.computeIfAbsent(requestHost, k -> new AtomicInteger(0)).incrementAndGet();

lastRequestTimes.put(requestHost, currentTime);

// Validate session cookie (replace with your actual validation logic)

if (sessionCookie == null || sessionCookie.isEmpty()) {

return false; // Invalid cookie

}

// Example validation: Check for specific attributes or expiration

if (!sessionCookie.contains("valid_session")) {

return false; // Invalid cookie format

}

// Reset request count after a certain time (e.g., 1 minute)

// This can be done periodically in a separate thread.

// For simplicity, we don't do it here.

return true; // Cookie is valid

}

public static void main(String[] args) {

// Example Usage

String host = "staging.example.com";

String cookie1 = "valid_session=true;other=value";

String cookie2 = null;

String cookie3 = "invalid_session";

System.out.println("Cookie 1 is valid: " + validateSessionCookie(host, cookie1)); // Expected: true

System.out.println("Cookie 2 is valid: " + validateSessionCookie(host, cookie2)); // Expected: false

System.out.println("Cookie 3 is valid: " + validateSessionCookie(host, cookie3)); // Expected: false

// Simulate rate limiting

for (int i = 0; i < MAX_REQUESTS_PER_MINUTE + 5; i++) {

System.out.println("Request " + (i + 1) + ": " + validateSessionCookie(host, cookie1));

}

}

}