<?php
/**
* Facebook for WooCommerce.
*/
namespace WooCommerce\Facebook\Framework\Api;
use WooCommerce\Facebook\Framework\Helper;
use WooCommerce\Facebook\Framework\Api\Exception as ApiException;
use WooCommerce\Facebook\Framework\Plugin;
use WooCommerce\Facebook\Framework\Plugin\Exception as PluginException;
defined( 'ABSPATH' ) || exit;
/**
* # WooCommerce Plugin Framework API Base Class
*
* This class provides a standardized framework for constructing an API wrapper
* to external services. It is designed to be extremely flexible.
*
* @version 2.2.0
*/
abstract class Base {
/** @var string request method, defaults to POST */
protected $request_method = 'POST';
/** @var string URI used for the request */
protected $request_uri;
/** @var array request headers */
protected $request_headers = [];
/** @var string request user-agent */
protected $request_user_agent;
/** @var string request HTTP version, defaults to 1.0 */
protected $request_http_version = '1.0';
/** @var string request duration */
protected $request_duration;
/** @var Request|object request */
protected $request;
/** @var string response code */
protected $response_code;
/** @var string response message */
protected $response_message;
/** @var array response headers */
protected $response_headers;
/** @var string raw response body */
protected $raw_response_body;
/** @var string response handler class name */
protected $response_handler;
/** @var Response|object response */
protected $response;
/**
* Perform the request and return the parsed response
*
* @since 2.2.0
*
* @param Request|object $request class instance which implements SV_WC_API_Request
* @return Response class instance which implements Api/Response
* @throws PluginException May be thrown in implementations.
*/
protected function perform_request( $request ) {
// Ensure API is in its default state.
$this->reset_response();
// Save the request object.
$this->request = $request;
$start_time = microtime( true );
// If this API requires TLS v1.2, force it.
if ( $this->require_tls_1_2() ) {
add_action( 'http_api_curl', array( $this, 'set_tls_1_2_request' ), 10, 3 );
}
// Perform the request.
$response = $this->do_remote_request( $this->get_request_uri(), $this->get_request_args() );
// Calculate request duration.
$this->request_duration = round( microtime( true ) - $start_time, 5 );
try {
// Parse & validate response.
$response = $this->handle_response( $response );
} catch ( PluginException $e ) {
// Alert other actors that a request has been made.
$this->broadcast_request();
throw $e;
}
return $response;
}
/**
* Simple wrapper for wp_remote_request() so child classes can override this
* and provide their own transport mechanism if needed, e.g. a custom
* cURL implementation
*
* @since 2.2.0
*
* @param string $request_uri
* @param array $request_args
* @return array|\WP_Error
*/
protected function do_remote_request( string $request_uri, array $request_args ) {
return wp_safe_remote_request( $request_uri, $request_args );
}
/**
* Handle and parse the response
*
* @since 2.2.0
* @param array|\WP_Error $response response data
* @throws ApiException Network issues, timeouts, API errors, etc.
* @return \WooCommerce\Facebook\API\Response Response class instance.
*/
protected function handle_response( $response ): \WooCommerce\Facebook\API\Response {
// check for WP HTTP API specific errors (network timeout, etc)
if ( is_wp_error( $response ) ) {
throw new ApiException( $response->get_error_message(), (int) $response->get_error_code() );
}
// set response data
$this->response_code = wp_remote_retrieve_response_code( $response );
$this->response_message = wp_remote_retrieve_response_message( $response );
$this->raw_response_body = wp_remote_retrieve_body( $response );
$response_headers = wp_remote_retrieve_headers( $response );
// WP 4.6+ returns an object
if ( is_object( $response_headers ) ) {
$response_headers = $response_headers->getAll();
}
$this->response_headers = $response_headers;
// parse the response body and tie it to the request
$this->response = $this->get_parsed_response( $this->raw_response_body );
// fire do_action() so other actors can act on request/response data,
// primarily used for logging
$this->broadcast_request();
return $this->response;
}
/**
* Return the parsed response object for the request
*
* @since 2.2.0
* @param string $raw_response_body
* @return object|Request response class instance which implements SV_WC_API_Request
*/
protected function get_parsed_response( $raw_response_body ) {
$handler_class = $this->get_response_handler();
return new $handler_class( $raw_response_body );
}
/**
* Alert other actors that a request has been performed. This is primarily used
* for request logging.
*
* @since 2.2.0
*/
protected function broadcast_request() {
$request_data = [
'method' => $this->get_request_method(),
'uri' => $this->get_request_uri(),
'user-agent' => $this->get_request_user_agent(),
'headers' => $this->get_sanitized_request_headers(),
'body' => $this->get_sanitized_request_body(),
'duration' => $this->get_request_duration() . 's', // seconds
];
$response_data = [
'code' => $this->get_response_code(),
'message' => $this->get_response_message(),
'headers' => $this->get_response_headers(),
'body' => $this->get_sanitized_response_body() ? $this->get_sanitized_response_body() : $this->get_raw_response_body(),
];
/**
* API Base Request Performed Action.
*
* Fired when an API request is performed via this base class. Plugins can
* hook into this to log request/response data.
*
* @since 2.2.0
* @param array $request_data {
* @type string $method request method, e.g. POST
* @type string $uri request URI
* @type string $user-agent
* @type string $headers request headers
* @type string $body request body
* @type string $duration in seconds
* }
* @param array $response data {
* @type string $code response HTTP code
* @type string $message response message
* @type string $headers response HTTP headers
* @type string $body response body
* }
* @param \WooCommerce\Facebook\Framework\Api\Base $this instance
*/
do_action( 'wc_' . $this->get_api_id() . '_api_request_performed', $request_data, $response_data, $this );
}
/**
* Reset the API response members to their
*
* @since 1.0.0
*/
protected function reset_response() {
$this->response_code = null;
$this->response_message = null;
$this->response_headers = null;
$this->raw_response_body = null;
$this->response = null;
$this->request_duration = null;
}
/** Request Getters *******************************************************/
/**
* Get the request URI
*
* @since 2.2.0
* @return string
*/
protected function get_request_uri() {
$uri = $this->request_uri . $this->get_request_path();
$query = $this->get_request_query();
// Append any query params to the URL when necessary.
if ( $query ) {
$url_parts = wp_parse_url( $uri );
// If the URL already has some query params, add to them.
if ( ! empty( $url_parts['query'] ) ) {
$query = '&' . $query;
} else {
$query = '?' . $query;
}
$uri = untrailingslashit( $uri ) . $query;
}
/**
* Request URI Filter.
*
* Allow actors to filter the request URI. Note that child classes can override
* this method, which means this filter may be invoked prior to the overridden
* method.
*
* @since 4.1.0
*
* @param string $uri current request URI
* @param Base class instance
*/
return apply_filters( 'wc_' . $this->get_api_id() . '_api_request_uri', $uri, $this );
}
/**
* Gets the request path.
*
* @since 4.5.0
* @return string
*/
protected function get_request_path() {
return ( $this->get_request() ) ? $this->get_request()->get_path() : '';
}
/**
* Gets the request URL query.
*
* @since 4.5.0
*
* @return string
*/
protected function get_request_query() {
$query = '';
$request = $this->get_request();
if ( $request && in_array( strtoupper( $this->get_request_method() ), [ 'GET', 'HEAD' ], true ) ) {
$params = $request->get_params();
if ( ! empty( $params ) ) {
$query = http_build_query( $params, '', '&' );
}
}
return $query;
}
/**
* Get the request arguments in the format required by wp_remote_request()
*
* @since 2.2.0
*
* @return array
*/
protected function get_request_args() {
$args = [
'method' => $this->get_request_method(),
'timeout' => MINUTE_IN_SECONDS,
'redirection' => 0,
'httpversion' => $this->get_request_http_version(),
'sslverify' => true,
'blocking' => true,
'user-agent' => $this->get_request_user_agent(),
'headers' => $this->get_request_headers(),
'body' => $this->get_request_body(),
'cookies' => [],
];
/**
* Request arguments.
*
* Allow other actors to filter the request arguments. Note that
* child classes can override this method, which means this filter may
* not be invoked, or may be invoked prior to the overridden method
*
* @since 2.2.0
* @param array $args request arguments
* @param Base class instance
*/
return apply_filters( 'wc_' . $this->get_api_id() . '_http_request_args', $args, $this );
}
/**
* Get the request method, POST by default
*
* @since 2.2.0
* @return string
*/
protected function get_request_method() {
// if the request object specifies the method to use, use that, otherwise use the API default
return $this->get_request() && $this->get_request()->get_method() ? $this->get_request()->get_method() : $this->request_method;
}
/**
* Gets the request body.
*
* @since 4.5.0
* @return string
*/
protected function get_request_body() {
// GET & HEAD requests don't support a body
if ( in_array( strtoupper( $this->get_request_method() ), [ 'GET', 'HEAD' ], true ) ) {
return '';
}
return ( $this->get_request() && $this->get_request()->to_string() ) ? $this->get_request()->to_string() : '';
}
/**
* Gets the sanitized request body, for logging.
*
* @since 4.5.0
* @return string
*/
protected function get_sanitized_request_body() {
// GET & HEAD requests don't support a body
if ( in_array( strtoupper( $this->get_request_method() ), [ 'GET', 'HEAD' ], true ) ) {
return '';
}
return ( $this->get_request() && $this->get_request()->to_string_safe() ) ? $this->get_request()->to_string_safe() : '';
}
/**
* Get the request HTTP version, 1.1 by default
*
* @since 2.2.0
* @return string
*/
protected function get_request_http_version() {
return $this->request_http_version;
}
/**
* Get the request headers
*
* @since 2.2.0
* @return array
*/
protected function get_request_headers() {
return $this->request_headers;
}
/**
* Get sanitized request headers suitable for logging, stripped of any
* confidential information
*
* The `Authorization` header is sanitized automatically.
*
* Child classes that implement any custom authorization headers should
* override this method to perform sanitization.
*
* @since 2.2.0
* @return array
*/
protected function get_sanitized_request_headers() {
$headers = $this->get_request_headers();
if ( ! empty( $headers['Authorization'] ) ) {
$headers['Authorization'] = str_repeat( '*', strlen( $headers['Authorization'] ) );
}
return $headers;
}
/**
* Get the request user agent, defaults to:
*
* Dasherized-Plugin-Name/Plugin-Version (WooCommerce/WC-Version; WordPress/WP-Version)
*
* @since 2.2.0
* @return string
*/
protected function get_request_user_agent() {
return sprintf( '%s/%s (WooCommerce/%s; WordPress/%s)', str_replace( ' ', '-', $this->get_plugin()->get_plugin_name() ), $this->get_plugin()->get_version(), WC_VERSION, $GLOBALS['wp_version'] );
}
/**
* Get the request duration in seconds, rounded to the 5th decimal place
*
* @since 2.2.0
* @return string
*/
protected function get_request_duration() {
return $this->request_duration;
}
/** Response Getters ******************************************************/
/**
* Get the response handler class name
*
* @since 2.2.0
* @return string
*/
protected function get_response_handler() {
return $this->response_handler;
}
/**
* Get the response code
*
* @since 2.2.0
* @return string
*/
protected function get_response_code() {
return $this->response_code;
}
/**
* Get the response message
*
* @since 2.2.0
* @return string
*/
protected function get_response_message() {
return $this->response_message;
}
/**
* Get the response headers
*
* @since 2.2.0
* @return array
*/
protected function get_response_headers() {
return $this->response_headers;
}
/**
* Get the raw response body, prior to any parsing or sanitization
*
* @since 2.2.0
* @return string
*/
protected function get_raw_response_body() {
return $this->raw_response_body;
}
/**
* Get the sanitized response body, provided by the response class
* to_string_safe() method
*
* @since 2.2.0
* @return string|null
*/
protected function get_sanitized_response_body() {
return is_callable( array( $this->get_response(), 'to_string_safe' ) ) ? $this->get_response()->to_string_safe() : null;
}
/** Misc Getters ******************************************************/
/**
* Returns the most recent request object.
*
* @since 2.2.0
*
* @return Request|object the most recent request object
*/
public function get_request() {
return $this->request;
}
/**
* Returns the most recent response object.
*
* @since 2.2.0
*
* @return Response|object the most recent response object
*/
public function get_response() {
return $this->response;
}
/**
* Get the ID for the API, used primarily to namespace the action name
* for broadcasting requests
*
* @since 2.2.0
* @return string
*/
protected function get_api_id() {
return $this->get_plugin()->get_id();
}
/**
* Return a new request object
*
* Child classes must implement this to return an object that implements
* \SV_WC_API_Request which should be used in the child class API methods
* to build the request. The returned SV_WC_API_Request should be passed
* to self::perform_request() by your concrete API methods
*
* @since 2.2.0
*
* @param array $args optional request arguments
* @return Request|object
*/
abstract protected function get_new_request( $args = [] );
/**
* Return the plugin class instance associated with this API
*
* Child classes must implement this to return their plugin class instance
*
* This is used for defining the plugin ID used in filter names, as well
* as the plugin name used for the default user agent.
*
* @since 2.2.0
*
* @return Plugin
*/
abstract protected function get_plugin();
/** Setters ***************************************************************/
/**
* Set a request header
*
* @since 2.2.0
* @param string $name header name
* @param string $value header value
*/
protected function set_request_header( $name, $value ) {
$this->request_headers[ $name ] = $value;
}
/**
* Set multiple request headers at once
*
* @since 4.3.0
* @param array $headers
*/
protected function set_request_headers( array $headers ) {
foreach ( $headers as $name => $value ) {
$this->request_headers[ $name ] = $value;
}
}
/**
* Set HTTP basic auth for the request
*
* @since 2.2.0
* @param string $username
* @param string $password
*/
protected function set_http_basic_auth( $username, $password ) {
$this->request_headers['Authorization'] = sprintf( 'Basic %s', base64_encode( "{$username}:{$password}" ) ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
}
/**
* Set the Content-Type request header
*
* @since 2.2.0
* @param string $content_type
*/
protected function set_request_content_type_header( $content_type ) {
$this->request_headers['content-type'] = $content_type;
}
/**
* Set the Accept request header
*
* @since 2.2.0
* @param string $type the request accept type
*/
protected function set_request_accept_header( $type ) {
$this->request_headers['accept'] = $type;
}
/**
* Set the response handler class name. This class will be instantiated
* to parse the response for the request.
*
* Note the class should implement SV_WC_API
*
* @since 2.2.0
*
* @param string $handler handle class name
*/
protected function set_response_handler( $handler ) {
$this->response_handler = $handler;
}
/**
* Maybe force TLS v1.2 requests.
*
* @since 4.4.0
*
* @param resource $handle the cURL handle returned by curl_init() (passed by reference)
* @param array $r the HTTP request arguments
* @param string $url string the request URL
*/
public function set_tls_1_2_request( $handle, $r, $url ) {
if ( ! Helper::str_starts_with( $url, 'https://' ) ) {
return;
}
//phpcs:ignore: WordPress.WP.AlternativeFunctions.curl_curl_setopt
curl_setopt( $handle, CURLOPT_SSLVERSION, 6 );
}
/**
* Determines if TLS v1.2 is required for API requests.
*
* @since 4.4.0
* @deprecated 5.5.2
*
* @return bool
*/
public function require_tls_1_2() {
return false;
}
/**
* Determines if TLS 1.2 is available.
*
* @since 4.6.5
*
* @return bool
*/
public function is_tls_1_2_available() {
/**
* Filters whether TLS 1.2 is available.
*
* @since 4.7.1
*
* @param bool $is_available whether TLS 1.2 is available
* @param Base $api API class instance
*/
return (bool) apply_filters( 'wc_' . $this->get_plugin()->get_id() . '_api_is_tls_1_2_available', $this->get_plugin()->is_tls_1_2_available(), $this );
}
}