Automattic / jetpack

				// Hack to preserve $HTTP_RAW_POST_DATA

				add_filter( 'xmlrpc_methods', array( $this, 'xmlrpc_methods' ) );

				if ( $this->verify_xml_rpc_signature() ) {

					// The actual API methods.

					add_filter( 'xmlrpc_methods', array( $this->xmlrpc_server, 'xmlrpc_methods' ) );

				} else {

					// The jetpack.authorize method should be available for unauthenticated users on a site with an

					// active Jetpack connection, so that additional users can link their account.

					add_filter( 'xmlrpc_methods', array( $this->xmlrpc_server, 'authorize_xmlrpc_methods' ) );

				}

			} else {

				// The bootstrap API methods.

				add_filter( 'xmlrpc_methods', array( $this->xmlrpc_server, 'bootstrap_xmlrpc_methods' ) );

					// active Jetpack connection, so that additional users can link their account.

					add_filter( 'xmlrpc_methods', array( $this->xmlrpc_server, 'authorize_xmlrpc_methods' ) );

				}

			} else {

				// The bootstrap API methods.

				add_filter( 'xmlrpc_methods', array( $this->xmlrpc_server, 'bootstrap_xmlrpc_methods' ) );

				if ( $this->verify_xml_rpc_signature() ) {

					// the jetpack Provision method is available for blog-token-signed requests

					add_filter( 'xmlrpc_methods', array( $this->xmlrpc_server, 'provision_xmlrpc_methods' ) );

				}

			}

			// Now that no one can authenticate, and we're whitelisting all XML-RPC methods, force enable_xmlrpc on.

			add_filter( 'pre_option_enable_xmlrpc', '__return_true' );