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| 1 | <?php |
| 2 | /** |
| 3 | * WPCOMSH Log file. |
| 4 | * |
| 5 | * @package wpcomsh |
| 6 | */ |
| 7 | |
| 8 | /** |
| 9 | * Class WPCOMSH_Log |
| 10 | * |
| 11 | * This is an interface for logging arbitrary data to wpcom logstash cluster. |
| 12 | * This auto-initializes and provides a hook to log data: |
| 13 | * ``` |
| 14 | * do_action( 'wpcomsh_log', "test" ); |
| 15 | * ``` |
| 16 | * |
| 17 | * You can see logs in Kibana, log2logstash index, `feature:automated_transfer`. |
| 18 | * |
| 19 | * Note that logging must be enabled for the site for the logs to be sent, |
| 20 | * which involves enabling the `at_options_logging_on` site option on the |
| 21 | * Jetpack site. |
| 22 | */ |
| 23 | class WPCOMSH_Log { |
| 24 | /** |
| 25 | * Logging Endpoint URL. |
| 26 | * |
| 27 | * @var string |
| 28 | */ |
| 29 | protected static $log_endpoint = 'https://public-api.wordpress.com/rest/v1.1/automated-transfers/log'; |
| 30 | |
| 31 | /** |
| 32 | * Class instance. |
| 33 | * |
| 34 | * @var WPCOMSH_Log |
| 35 | */ |
| 36 | private static $instance; |
| 37 | |
| 38 | /** |
| 39 | * Queue of log messages. |
| 40 | * |
| 41 | * @var array |
| 42 | */ |
| 43 | private $log_queue = array(); |
| 44 | |
| 45 | /** |
| 46 | * Whether it has a shutdown hook. |
| 47 | * |
| 48 | * @var bool |
| 49 | */ |
| 50 | private $has_shutdown_hook = false; |
| 51 | |
| 52 | /** |
| 53 | * Site URL. |
| 54 | * |
| 55 | * @var string |
| 56 | */ |
| 57 | private $siteurl; |
| 58 | |
| 59 | /** |
| 60 | * This instantiates the logging system. Because constructor is private, it can be only set up with `init` or `unsafe_direct_log`. |
| 61 | * `init` respects `at_options_logging_on` option. This essentially turns logging on/off so that we don't flood |
| 62 | * endpoint with too many requests. |
| 63 | * This is to be hooked into wp `init` hook. |
| 64 | */ |
| 65 | public static function init() { |
| 66 | if ( ! get_option( 'at_options_logging_on' ) ) { |
| 67 | return; |
| 68 | } |
| 69 | |
| 70 | if ( self::$instance ) { |
| 71 | return; |
| 72 | } |
| 73 | |
| 74 | self::$instance = new self(); |
| 75 | self::$instance->add_hooks(); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * This method bypasses `at_options_logging_on` check. |
| 80 | * It is intended to be used when we are sure we want to send logs to logstash and |
| 81 | * we are sure that we don't fire it off frequently. Good example of when we want to use this |
| 82 | * is during the site setup process |
| 83 | * |
| 84 | * @param string $message Log message. |
| 85 | * @param array $extra Optional. Additional log data. Defaults to empty array. |
| 86 | */ |
| 87 | public static function unsafe_direct_log( $message, $extra = array() ) { |
| 88 | if ( ! self::$instance ) { |
| 89 | self::$instance = new self(); |
| 90 | } |
| 91 | self::$instance->log( $message, $extra ); |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Constructor. |
| 96 | */ |
| 97 | private function __construct() { |
| 98 | $this->siteurl = get_site_url(); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Adds the log action. |
| 103 | */ |
| 104 | private function add_hooks() { |
| 105 | add_action( 'wpcomsh_log', array( $this, 'log' ), 1 ); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Logs a log message. |
| 110 | * |
| 111 | * @param string $message Log message. |
| 112 | * @param array $extra Optional. Additional log data. Defaults to empty array. |
| 113 | */ |
| 114 | public function log( $message, $extra = array() ) { |
| 115 | $this->log_queue[] = array( |
| 116 | 'message' => $message, |
| 117 | 'extra' => $extra, |
| 118 | ); |
| 119 | if ( ! $this->has_shutdown_hook ) { |
| 120 | register_shutdown_function( array( $this, 'send_to_api' ) ); |
| 121 | $this->has_shutdown_hook = true; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Sends log messages to the API endpoint. |
| 127 | */ |
| 128 | public function send_to_api() { |
| 129 | if ( count( $this->log_queue ) > 0 ) { |
| 130 | $payload = array( |
| 131 | 'siteurl' => $this->siteurl, |
| 132 | 'messages' => $this->log_queue, |
| 133 | ); |
| 134 | |
| 135 | wp_remote_post( self::$log_endpoint, array( 'body' => array( 'error' => wp_json_encode( $payload, JSON_UNESCAPED_SLASHES ) ) ) ); |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | add_action( 'init', array( 'WPCOMSH_Log', 'init' ) ); |