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

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+<?php
+/**
+ * EWWW Async Request
+ *
+ * @link https://ewww.io
+ * @package EWWW_Image_Optimizer
+ */
+
+namespace EWWW;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Abstract EWWW\Async_Request class.
+ *
+ * @abstract
+ */
+abstract class Async_Request {
+
+	/**
+	 * Prefix
+	 *
+	 * (default value: 'wp')
+	 *
+	 * @var string
+	 * @access protected
+	 */
+	protected $prefix = 'wp';
+
+	/**
+	 * Action
+	 *
+	 * (default value: 'async_request')
+	 *
+	 * @var string
+	 * @access protected
+	 */
+	protected $action = 'async_request';
+
+	/**
+	 * Identifier
+	 *
+	 * @var mixed
+	 * @access protected
+	 */
+	protected $identifier;
+
+	/**
+	 * Data
+	 *
+	 * (default value: array())
+	 *
+	 * @var array
+	 * @access protected
+	 */
+	protected $data = array();
+
+	/**
+	 * Initiate new async request
+	 */
+	public function __construct() {
+		$this->identifier = $this->prefix . '_' . $this->action;
+
+		\add_action( 'wp_ajax_' . $this->identifier, array( $this, 'maybe_handle' ) );
+		\add_action( 'wp_ajax_nopriv_' . $this->identifier, array( $this, 'maybe_handle' ) );
+	}
+
+	/**
+	 * Set data used during the request
+	 *
+	 * @param array $data Data.
+	 *
+	 * @return $this
+	 */
+	public function data( $data ) {
+		$this->data = $data;
+
+		return $this;
+	}
+
+	/**
+	 * Dispatch the async request
+	 *
+	 * @return array|WP_Error
+	 */
+	public function dispatch() {
+		$url  = \add_query_arg( $this->get_query_args(), $this->get_query_url() );
+		$args = $this->get_post_args();
+
+		// Close up any loose sessions before we open another request.
+		\session_write_close();
+		return \wp_remote_post( \esc_url_raw( $url ), $args );
+	}
+
+	/**
+	 * Get query args
+	 *
+	 * @return array
+	 */
+	protected function get_query_args() {
+		if ( \property_exists( $this, 'query_args' ) ) {
+			return $this->query_args;
+		}
+
+		return array(
+			'action' => $this->identifier,
+			'nonce'  => \wp_create_nonce( $this->identifier ),
+		);
+	}
+
+	/**
+	 * Get query URL
+	 *
+	 * @return string
+	 */
+	protected function get_query_url() {
+		if ( \property_exists( $this, 'query_url' ) ) {
+			return $this->query_url;
+		}
+
+		return \admin_url( 'admin-ajax.php' );
+	}
+
+	/**
+	 * Get post args
+	 *
+	 * @return array
+	 */
+	protected function get_post_args() {
+		if ( \property_exists( $this, 'post_args' ) ) {
+			return $this->post_args;
+		}
+
+		return array(
+			'timeout'   => 0.01,
+			'blocking'  => false,
+			'body'      => $this->data,
+			'cookies'   => $_COOKIE,
+			'sslverify' => \apply_filters( 'https_local_ssl_verify', false ),
+		);
+	}
+
+	/**
+	 * Maybe handle
+	 *
+	 * Check for correct nonce and pass to handler.
+	 */
+	public function maybe_handle() {
+		// Don't lock up other requests while processing.
+		\session_write_close();
+
+		\check_ajax_referer( $this->identifier, 'nonce' );
+
+		$this->handle();
+
+		die;
+	}
+
+	/**
+	 * Handle
+	 *
+	 * Override this method to perform any actions required
+	 * during the async request.
+	 */
+	abstract protected function handle();
+}