Updates

wp-admin/admin-post.php

@@ -1,31 +1,71 @@
 <?php
 /**
- * WordPress Administration Generic POST Handler.
+ * WordPress Generic Request (POST/GET) Handler
+ *
+ * Intended for form submission handling in themes and plugins.
  *
  * @package WordPress
  * @subpackage Administration
  */
 
 /** We are located in WordPress Administration Screens */
-define('WP_ADMIN', true);
+if ( ! defined( 'WP_ADMIN' ) ) {
+	define( 'WP_ADMIN', true );
+}
 
 if ( defined('ABSPATH') )
 	require_once(ABSPATH . 'wp-load.php');
 else
-	require_once('../wp-load.php');
+	require_once( dirname( dirname( __FILE__ ) ) . '/wp-load.php' );
+
+/** Allow for cross-domain requests (from the frontend). */
+send_origin_headers();
 
 require_once(ABSPATH . 'wp-admin/includes/admin.php');
 
 nocache_headers();
 
-do_action('admin_init');
+/** This action is documented in wp-admin/admin.php */
+do_action( 'admin_init' );
 
-$action = 'admin_post';
+$action = empty( $_REQUEST['action'] ) ? '' : $_REQUEST['action'];
 
-if ( !wp_validate_auth_cookie() )
-	$action .= '_nopriv';
-
-if ( !empty($_REQUEST['action']) )
-	$action .= '_' . $_REQUEST['action'];
-
-do_action($action);
+if ( ! wp_validate_auth_cookie() ) {
+	if ( empty( $action ) ) {
+		/**
+		 * Fires on a non-authenticated admin post request where no action was supplied.
+		 *
+		 * @since 2.6.0
+		 */
+		do_action( 'admin_post_nopriv' );
+	} else {
+		/**
+		 * Fires on a non-authenticated admin post request for the given action.
+		 *
+		 * The dynamic portion of the hook name, `$action`, refers to the given
+		 * request action.
+		 *
+		 * @since 2.6.0
+		 */
+		do_action( "admin_post_nopriv_{$action}" );
+	}
+} else {
+	if ( empty( $action ) ) {
+		/**
+		 * Fires on an authenticated admin post request where no action was supplied.
+		 *
+		 * @since 2.6.0
+		 */
+		do_action( 'admin_post' );
+	} else {
+		/**
+		 * Fires on an authenticated admin post request for the given action.
+		 *
+		 * The dynamic portion of the hook name, `$action`, refers to the given
+		 * request action.
+		 *
+		 * @since 2.6.0
+		 */
+		do_action( "admin_post_{$action}" );
+	}
+}