XML-RPC: Emit an appropriate HTTP status code when an error is returned in response to an XML-RPC request.

This most notably affects the response when XML-RPC is disabled or when the supplied username and password is incorrect.

Props ericmann

Fixes #48213

Built from https://develop.svn.wordpress.org/trunk@49862


git-svn-id: http://core.svn.wordpress.org/trunk@49581 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/IXR/class-IXR-server.php

@@ -129,6 +129,11 @@ EOD;
         if ($message && !is_object($error)) {
             $error = new IXR_Error($error, $message);
         }
+
+		if ( function_exists( 'status_header' ) ) {
+			status_header( $error->code );
+		}
+
         $this->output($error->getXml());
     }
 

wp-includes/class-wp-xmlrpc-server.php

@@ -286,7 +286,7 @@ class wp_xmlrpc_server extends IXR_Server {
 			 *
 			 * @since 3.5.0
 			 *
-			 * @param string   $error The XML-RPC error message.
+			 * @param IXR_Error $error The XML-RPC error message.
 			 * @param WP_Error  $user  WP_Error object.
 			 */
 			$this->error = apply_filters( 'xmlrpc_login_error', $this->error, $user );

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-49860';
+$wp_version = '5.7-alpha-49862';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.