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<?php |
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require_once dirname( __FILE__ ) . '/class.jetpack-sync-json-deflate-codec.php'; |
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/** |
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* Simple version of a Jetpack Sync Server - just receives arrays of events and |
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* issues them locally with the 'jetpack_sync_remote_action' action. |
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*/ |
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class Jetpack_Sync_Server { |
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private $codec; |
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const MAX_TIME_PER_REQUEST_IN_SECONDS = 15; |
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const BLOG_LOCK_TRANSIENT_PREFIX = 'jp_sync_req_lock_'; |
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const BLOG_LOCK_TRANSIENT_EXPIRY = 60; // seconds |
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// this is necessary because you can't use "new" when you declare instance properties >:( |
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function __construct() { |
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$this->codec = new Jetpack_Sync_JSON_Deflate_Codec(); |
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} |
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function set_codec( iJetpack_Sync_Codec $codec ) { |
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$this->codec = $codec; |
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} |
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function attempt_request_lock( $blog_id, $expiry = self::BLOG_LOCK_TRANSIENT_EXPIRY ) { |
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$transient_name = $this->get_concurrent_request_transient_name( $blog_id ); |
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$locked_time = get_site_transient( $transient_name ); |
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if ( $locked_time ) { |
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return false; |
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} |
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set_site_transient( $transient_name, microtime( true ), $expiry ); |
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return true; |
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} |
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private function get_concurrent_request_transient_name( $blog_id ) { |
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return self::BLOG_LOCK_TRANSIENT_PREFIX . $blog_id; |
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} |
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function remove_request_lock( $blog_id ) { |
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delete_site_transient( $this->get_concurrent_request_transient_name( $blog_id ) ); |
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} |
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function receive( $data, $token = null, $sent_timestamp = null, $queue_id = null ) { |
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$start_time = microtime( true ); |
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if ( ! is_array( $data ) ) { |
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return new WP_Error( 'action_decoder_error', 'Events must be an array' ); |
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} |
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if ( $token && ! $this->attempt_request_lock( $token->blog_id ) ) { |
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/** |
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* Fires when the server receives two concurrent requests from the same blog |
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* |
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* @since 4.2.0 |
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* |
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* @param token The token object of the misbehaving site |
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*/ |
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do_action( 'jetpack_sync_multi_request_fail', $token ); |
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return new WP_Error( 'concurrent_request_error', 'There is another request running for the same blog ID' ); |
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} |
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$events = wp_unslash( array_map( array( $this->codec, 'decode' ), $data ) ); |
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$events_processed = array(); |
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/** |
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* Fires when an array of actions are received from a remote Jetpack site |
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* |
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* @since 4.2.0 |
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* |
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* @param array Array of actions received from the remote site |
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*/ |
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do_action( 'jetpack_sync_remote_actions', $events, $token ); |
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foreach ( $events as $key => $event ) { |
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list( $action_name, $args, $user_id, $timestamp ) = $event; |
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/** |
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* Fires when an action is received from a remote Jetpack site |
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* |
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* @since 4.2.0 |
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* |
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* @param string $action_name The name of the action executed on the remote site |
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* @param array $args The arguments passed to the action |
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* @param int $user_id The external_user_id who did the action |
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* @param double $timestamp Timestamp (in seconds) when the action occurred |
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* @param double $sent_timestamp Timestamp (in seconds) when the action was transmitted |
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* @param string $queue_id ID of the queue from which the event was sent (sync or full_sync) |
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* @param array $token The auth token used to invoke the API |
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*/ |
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do_action( 'jetpack_sync_remote_action', $action_name, $args, $user_id, $timestamp, $sent_timestamp, $queue_id, $token ); |
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$events_processed[] = $key; |
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if ( microtime( true ) - $start_time > self::MAX_TIME_PER_REQUEST_IN_SECONDS ) { |
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break; |
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} |
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} |
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if ( $token ) { |
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$this->remove_request_lock( $token->blog_id ); |
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} |
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return $events_processed; |
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} |
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} |
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Automattic /
jetpack
