2023-04-21 23:25:39 +02:00
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<?php
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namespace Activitypub\Rest;
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2023-05-22 11:31:46 +02:00
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use stdClass;
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2023-05-05 20:02:12 +02:00
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use WP_REST_Response;
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2023-04-21 23:25:39 +02:00
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use Activitypub\Signature;
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2023-06-01 11:45:07 +02:00
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use Activitypub\Model\Application_User;
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2023-04-21 23:25:39 +02:00
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/**
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* ActivityPub Server REST-Class
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*
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* @author Django Doucet
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*
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* @see https://www.w3.org/TR/activitypub/#security-verification
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*/
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class Server {
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/**
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* Initialize the class, registering WordPress hooks
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*/
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public static function init() {
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2023-05-05 20:02:12 +02:00
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\add_action( 'rest_api_init', array( self::class, 'register_routes' ) );
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2023-05-18 08:03:11 +02:00
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\add_filter( 'rest_request_before_callbacks', array( self::class, 'authorize_activitypub_requests' ), 10, 3 );
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2023-05-05 20:02:12 +02:00
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}
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/**
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* Register routes
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*/
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public static function register_routes() {
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\register_rest_route(
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2023-05-18 08:03:11 +02:00
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ACTIVITYPUB_REST_NAMESPACE,
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2023-05-05 20:09:12 +02:00
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'/application',
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2023-05-05 20:02:12 +02:00
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array(
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array(
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'methods' => \WP_REST_Server::READABLE,
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2023-05-05 20:09:12 +02:00
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'callback' => array( self::class, 'application_actor' ),
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2023-05-05 20:02:12 +02:00
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'permission_callback' => '__return_true',
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),
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)
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);
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}
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/**
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2023-05-05 20:09:12 +02:00
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* Render Application actor profile
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2023-05-05 20:02:12 +02:00
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*
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2023-05-12 10:17:36 +02:00
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* @return WP_REST_Response The JSON profile of the Application Actor.
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2023-05-05 20:02:12 +02:00
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*/
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2023-05-05 20:09:12 +02:00
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public static function application_actor() {
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2023-06-01 11:45:07 +02:00
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$user = new Application_User();
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$json = $user->to_array();
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2023-05-05 20:02:12 +02:00
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$response = new WP_REST_Response( $json, 200 );
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$response->header( 'Content-Type', 'application/activity+json' );
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return $response;
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2023-04-21 23:25:39 +02:00
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}
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/**
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* Callback function to authorize each api requests
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*
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2023-05-22 11:31:46 +02:00
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* @see WP_REST_Request
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*
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* @param WP_REST_Response|WP_HTTP_Response|WP_Error|mixed $response Result to send to the client.
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* Usually a WP_REST_Response or WP_Error.
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* @param array $handler Route handler used for the request.
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* @param WP_REST_Request $request Request used to generate the response.
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*
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* @return mixed|WP_Error The response, error, or modified response.
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*/
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public static function authorize_activitypub_requests( $response, $handler, $request ) {
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2023-05-06 07:44:15 +02:00
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$route = $request->get_route();
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2023-05-22 11:31:46 +02:00
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2023-05-22 13:35:46 +02:00
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// check if it is an activitypub request and exclude webfinger and nodeinfo endpoints
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2023-05-22 13:34:14 +02:00
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if (
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! str_starts_with( $route, '/' . ACTIVITYPUB_REST_NAMESPACE ) ||
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str_starts_with( $route, '/' . \trailingslashit( ACTIVITYPUB_REST_NAMESPACE ) . 'webfinger' ) ||
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str_starts_with( $route, '/' . \trailingslashit( ACTIVITYPUB_REST_NAMESPACE ) . 'nodeinfo' )
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) {
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return $response;
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}
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2023-05-22 13:35:46 +02:00
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// POST-Requets are always signed
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2023-05-09 11:57:43 +02:00
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if ( 'POST' === $request->get_method() ) {
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$verified_request = Signature::verify_http_signature( $request );
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if ( \is_wp_error( $verified_request ) ) {
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return $verified_request;
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}
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} elseif ( 'GET' === $request->get_method() ) { // GET-Requests are only signed in secure mode
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if ( ACTIVITYPUB_SECURE_MODE ) {
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$verified_request = Signature::verify_http_signature( $request );
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if ( \is_wp_error( $verified_request ) ) {
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return $verified_request;
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2023-05-05 22:39:33 +02:00
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}
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2023-04-21 23:25:39 +02:00
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}
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}
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2023-05-09 11:57:43 +02:00
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return $response;
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2023-04-21 23:25:39 +02:00
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}
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}
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