first commit

2025-05-31 18:56:37 +02:00
commit 8c4798a5fd
1240 changed files with 190468 additions and 0 deletions
--- a/application/helpers/rate_limit_helper.php
+++ b/application/helpers/rate_limit_helper.php
@@ -0,0 +1,79 @@
+<?php defined('BASEPATH') or exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2020, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.1.0
+ * ---------------------------------------------------------------------------- */
+
+if (!function_exists('rate_limit')) {
+    /**
+     * Rate-limit the application requests.
+     *
+     * Example:
+     *
+     * rate_limit($CI->input->ip_address(), 100, 300);
+     *
+     * @link https://github.com/alexandrugaidei-atomate/ratelimit-codeigniter-filebased
+     *
+     * @param string $ip Client IP address.
+     * @param int $max_requests Number of allowed requests, defaults to 100.
+     * @param int $duration In seconds, defaults to 2 minutes.
+     */
+    function rate_limit(string $ip, int $max_requests = 100, int $duration = 120): void
+    {
+        /** @var EA_Controller $CI */
+        $CI = &get_instance();
+
+        $rate_limiting = $CI->config->item('rate_limiting');
+
+        if (!$rate_limiting || is_cli()) {
+            return;
+        }
+
+        $CI->load->driver('cache', ['adapter' => 'file']);
+
+        $cache_key = str_replace(':', '', 'rate_limit_key_' . $ip);
+
+        $cache_remain_time_key = str_replace(':', '', 'rate_limit_tmp_' . $ip);
+
+        $current_time = date('Y-m-d H:i:s');
+
+        if ($CI->cache->get($cache_key) === false) {
+            // First request
+            $current_time_plus = date('Y-m-d H:i:s', strtotime('+' . $duration . ' seconds'));
+
+            $CI->cache->save($cache_key, 1, $duration);
+
+            $CI->cache->save($cache_remain_time_key, $current_time_plus, $duration * 2);
+        }
+        // Consequent request
+        else {
+            $requests = $CI->cache->get($cache_key);
+
+            $time_lost = $CI->cache->get($cache_remain_time_key);
+
+            if ($current_time > $time_lost) {
+                $current_time_plus = date('Y-m-d H:i:s', strtotime('+' . $duration . ' seconds'));
+
+                $CI->cache->save($cache_key, 1, $duration);
+
+                $CI->cache->save($cache_remain_time_key, $current_time_plus, $duration * 2);
+            } else {
+                $CI->cache->save($cache_key, $requests + 1, $duration);
+            }
+
+            $requests = $CI->cache->get($cache_key);
+
+            if ($requests > $max_requests) {
+                header('HTTP/1.0 429 Too Many Requests');
+                exit();
+            }
+        }
+    }
+}