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system/Filters/Honeypot.php

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+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Filters;
+
+use CodeIgniter\Honeypot\Exceptions\HoneypotException;
+use CodeIgniter\HTTP\RequestInterface;
+use CodeIgniter\HTTP\ResponseInterface;
+use Config\Services;
+
+/**
+ * Honeypot filter
+ */
+class Honeypot implements FilterInterface
+{
+    /**
+     * Checks if Honeypot field is empty, if not then the
+     * requester is a bot
+     *
+     * @param array|null $arguments
+     *
+     * @throws HoneypotException
+     */
+    public function before(RequestInterface $request, $arguments = null)
+    {
+        if (Services::honeypot()->hasContent($request)) {
+            throw HoneypotException::isBot();
+        }
+    }
+
+    /**
+     * Attach a honeypot to the current response.
+     *
+     * @param array|null $arguments
+     */
+    public function after(RequestInterface $request, ResponseInterface $response, $arguments = null)
+    {
+        Services::honeypot()->attachHoneypot($response);
+    }
+}