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| 1 | <?php |
| 2 | /** |
| 3 | * IXR_Client |
| 4 | * |
| 5 | * @package automattic/jetpack-connection |
| 6 | * |
| 7 | * @since 1.7.0 |
| 8 | * @since-jetpack 1.5 |
| 9 | * @since-jetpack 7.7 Moved to the jetpack-connection package. |
| 10 | */ |
| 11 | |
| 12 | use Automattic\Jetpack\Connection\Client; |
| 13 | use Automattic\Jetpack\Connection\Error_Handler; |
| 14 | use Automattic\Jetpack\Connection\Manager; |
| 15 | |
| 16 | /** |
| 17 | * Disable direct access. |
| 18 | */ |
| 19 | if ( ! defined( 'ABSPATH' ) ) { |
| 20 | exit( 0 ); |
| 21 | } |
| 22 | |
| 23 | if ( ! class_exists( IXR_Client::class ) ) { |
| 24 | require_once ABSPATH . WPINC . '/class-IXR.php'; |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * A Jetpack implementation of the WordPress core IXR client. |
| 29 | */ |
| 30 | class Jetpack_IXR_Client extends IXR_Client { |
| 31 | /** |
| 32 | * Jetpack args, used for the remote requests. |
| 33 | * |
| 34 | * @var array |
| 35 | */ |
| 36 | public $jetpack_args = null; |
| 37 | |
| 38 | /** |
| 39 | * Remote Response Headers. |
| 40 | * |
| 41 | * @var array |
| 42 | */ |
| 43 | public $response_headers = null; |
| 44 | |
| 45 | /** |
| 46 | * Holds the raw remote response from the latest call to query(). |
| 47 | * |
| 48 | * @var null|array|WP_Error |
| 49 | */ |
| 50 | public $last_response = null; |
| 51 | |
| 52 | /** |
| 53 | * Constructor. |
| 54 | * Initialize a new Jetpack IXR client instance. |
| 55 | * |
| 56 | * @param array $args Jetpack args, used for the remote requests. |
| 57 | * @param string|bool $path Path to perform the reuqest to. |
| 58 | * @param int $port Port number. |
| 59 | * @param int $timeout The connection timeout, in seconds. |
| 60 | */ |
| 61 | public function __construct( $args = array(), $path = false, $port = 80, $timeout = 15 ) { |
| 62 | $connection = new Manager(); |
| 63 | |
| 64 | $defaults = array( |
| 65 | 'url' => $connection->xmlrpc_api_url(), |
| 66 | 'user_id' => 0, |
| 67 | 'headers' => array(), |
| 68 | ); |
| 69 | |
| 70 | $args = wp_parse_args( $args, $defaults ); |
| 71 | $args['headers'] = array_merge( array( 'Content-Type' => 'text/xml' ), (array) $args['headers'] ); |
| 72 | |
| 73 | $this->jetpack_args = $args; |
| 74 | |
| 75 | $this->IXR_Client( $args['url'], $path, $port, $timeout ); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Perform the IXR request. |
| 80 | * |
| 81 | * @param mixed ...$args IXR method and args. |
| 82 | * |
| 83 | * @return bool True if request succeeded, false otherwise. |
| 84 | */ |
| 85 | public function query( ...$args ) { |
| 86 | $method = array_shift( $args ); |
| 87 | $request = new IXR_Request( $method, $args ); |
| 88 | $xml = trim( $request->getXml() ); |
| 89 | |
| 90 | $response = Client::remote_request( $this->jetpack_args, $xml ); |
| 91 | |
| 92 | // Store response headers. |
| 93 | $this->response_headers = wp_remote_retrieve_headers( $response ); |
| 94 | |
| 95 | $this->last_response = $response; |
| 96 | if ( is_array( $this->last_response ) && isset( $this->last_response['http_response'] ) ) { |
| 97 | // If the expected array response is received, format the data as plain arrays. |
| 98 | $this->last_response = $this->last_response['http_response']->to_array(); |
| 99 | $this->last_response['headers'] = $this->last_response['headers']->getAll(); |
| 100 | } |
| 101 | |
| 102 | if ( is_wp_error( $response ) ) { |
| 103 | $this->error = new IXR_Error( -10520, sprintf( 'Jetpack: [%s] %s', $response->get_error_code(), $response->get_error_message() ) ); |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | if ( ! $response ) { |
| 108 | $this->error = new IXR_Error( -10520, 'Jetpack: Unknown Error' ); |
| 109 | return false; |
| 110 | } |
| 111 | |
| 112 | if ( 200 !== wp_remote_retrieve_response_code( $response ) ) { |
| 113 | $this->error = new IXR_Error( -32300, 'transport error - HTTP status code was not 200' ); |
| 114 | return false; |
| 115 | } |
| 116 | |
| 117 | $content = wp_remote_retrieve_body( $response ); |
| 118 | |
| 119 | // Now parse what we've got back. |
| 120 | $this->message = new IXR_Message( $content ); |
| 121 | if ( ! $this->message->parse() ) { |
| 122 | // XML error. |
| 123 | $this->error = new IXR_Error( -32700, 'parse error. not well formed' ); |
| 124 | return false; |
| 125 | } |
| 126 | |
| 127 | // Is the message a fault? |
| 128 | if ( 'fault' === $this->message->messageType ) { |
| 129 | $this->error = new IXR_Error( $this->message->faultCode, $this->message->faultString ); |
| 130 | |
| 131 | // Faults arrive as HTTP 200 responses with an XML body, so they never reach |
| 132 | // Error_Handler::check_api_response_for_errors() (called on this same request by |
| 133 | // Client::remote_request()); report them here instead. |
| 134 | // |
| 135 | // method_exists() guards against mid-update/mid-deploy skew: this legacy file can |
| 136 | // load before the connection package's Error_Handler class does, so the method may |
| 137 | // not exist yet on this request. |
| 138 | if ( method_exists( Error_Handler::class, 'check_xmlrpc_fault_for_errors' ) ) { |
| 139 | // is_scalar() avoids a PHP 8 array-to-string warning if malformed XML ever |
| 140 | // leaves faultString as something other than a string. |
| 141 | $fault_string = is_scalar( $this->message->faultString ) ? (string) $this->message->faultString : ''; |
| 142 | $parsed = self::parse_jetpack_fault_string( $fault_string ); |
| 143 | |
| 144 | if ( $parsed !== null ) { |
| 145 | $user_id = true === $this->jetpack_args['user_id'] |
| 146 | ? (int) \Jetpack_Options::get_option( 'master_user' ) |
| 147 | : (int) $this->jetpack_args['user_id']; |
| 148 | |
| 149 | Error_Handler::get_instance()->check_xmlrpc_fault_for_errors( |
| 150 | $parsed[0], |
| 151 | $parsed[1], |
| 152 | $this->jetpack_args['url'], |
| 153 | 'POST', |
| 154 | $user_id |
| 155 | ); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | return false; |
| 160 | } |
| 161 | |
| 162 | // Message must be OK. |
| 163 | return true; |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Retrieve the Jetpack error from the result of the last request. |
| 168 | * |
| 169 | * @param int $fault_code Fault code. |
| 170 | * @param string $fault_string Fault string. |
| 171 | * @return WP_Error Error object. |
| 172 | */ |
| 173 | public function get_jetpack_error( $fault_code = null, $fault_string = null ) { |
| 174 | if ( $fault_code === null ) { |
| 175 | $fault_code = $this->error->code; |
| 176 | } |
| 177 | |
| 178 | if ( $fault_string === null ) { |
| 179 | $fault_string = $this->error->message; |
| 180 | } |
| 181 | |
| 182 | $parsed = self::parse_jetpack_fault_string( $fault_string ); |
| 183 | |
| 184 | if ( $parsed !== null ) { |
| 185 | list( $code, $message ) = $parsed; |
| 186 | return new WP_Error( $code, $message, $fault_code ); |
| 187 | } |
| 188 | |
| 189 | return new WP_Error( "IXR_{$fault_code}", $fault_string ); |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * Parse a `Jetpack: [code] message` fault string, the convention WP.com uses to surface |
| 194 | * a Jetpack-specific error code and message inside an XML-RPC fault. |
| 195 | * |
| 196 | * Without the `s` modifier, `.` doesn't match a newline, and unmodified `$` anchors to the |
| 197 | * end of the whole string (not each line) — so a fault string containing embedded newlines |
| 198 | * after the code fails this match entirely rather than truncating the message. WP.com fault |
| 199 | * strings are single-line in practice, so this is intentional, not a bug. |
| 200 | * |
| 201 | * @param string $fault_string The XML-RPC fault string. |
| 202 | * @return array{0: string, 1: string}|null A [ code, message ] pair, or null if the string |
| 203 | * doesn't follow the convention. |
| 204 | */ |
| 205 | public static function parse_jetpack_fault_string( $fault_string ) { |
| 206 | if ( ! preg_match( '#\Ajetpack:\s+\[(\w+)\]\s*(.*)$#i', $fault_string, $match ) ) { |
| 207 | return null; |
| 208 | } |
| 209 | |
| 210 | return array( $match[1], $match[2] ); |
| 211 | } |
| 212 | |
| 213 | /** |
| 214 | * Retrieve a response header if set. |
| 215 | * |
| 216 | * @param string $name header name. |
| 217 | * @return string|bool Header value if set, false if not set. |
| 218 | */ |
| 219 | public function get_response_header( $name ) { |
| 220 | if ( isset( $this->response_headers[ $name ] ) ) { |
| 221 | return $this->response_headers[ $name ]; |
| 222 | } |
| 223 | // case-insensitive header names: http://www.ietf.org/rfc/rfc2616.txt. |
| 224 | if ( isset( $this->response_headers[ strtolower( $name ) ] ) ) { |
| 225 | return $this->response_headers[ strtolower( $name ) ]; |
| 226 | } |
| 227 | return false; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Retrieve the raw response for the last query() call. |
| 232 | * |
| 233 | * @return null|array|WP_Error |
| 234 | */ |
| 235 | public function get_last_response() { |
| 236 | return $this->last_response; |
| 237 | } |
| 238 | } |