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wp-content/plugins/ewww-image-optimizer/classes/class-async-test-optimize.php

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+<?php
+/**
+ * Class for Background of Media Library images.
+ *
+ * @link https://ewww.io
+ * @package EWWW_Image_Optimizer
+ */
+
+namespace EWWW;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Handles a simulated async request used to test async requests for the debugger.
+ *
+ * @see EWWW\Async_Request
+ */
+class Async_Test_Optimize extends Async_Request {
+
+	/**
+	 * The action name used to trigger this class extension.
+	 *
+	 * @access protected
+	 * @var string $action
+	 */
+	protected $action = 'ewwwio_test_optimize';
+
+	/**
+	 * Handles the test async request.
+	 *
+	 * Called via a POST request to verify that nothing is blocking or altering requests from the server to itself.
+	 */
+	protected function handle() {
+		session_write_close();
+		ewwwio_debug_message( '<b>' . __METHOD__ . '()</b>' );
+		check_ajax_referer( $this->identifier, 'nonce' );
+		if ( empty( $_POST['ewwwio_test_verify'] ) ) {
+			return;
+		}
+	}
+}