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<?php namespace WP_Rocket\Engine\Common\JobManager\APIHandler; use WP_Error; /** * Class AbstractSafeAPIClient * * This abstract class provides a base for making API requests. * It includes methods for sending GET and POST requests, and handles transient caching to mitigate the impact of API failures. * * @package WP_Rocket\Engine\Common\JobManager\APIHandler / abstract class AbstractSafeAPIClient { /* * Get the transient key. * * @return string The transient key. / abstract protected function get_transient_key(); /* * Get the API URL. * * @return string The API URL. / abstract protected function get_api_url(); /* * Send a GET request. * * @param array $params The request parameters. * @param bool $safe Send safe request WP functions or not, default to not. * * @return mixed The response from the API. / public function send_get_request( $params = [], $safe = false ) { return $this->send_request( 'GET', $params, $safe ); } /* * Send a POST request. * * @param array $params The request parameters. * @param bool $safe Send safe request WP functions or not, default to not. * * @return mixed The response from the API. / public function send_post_request( $params = [], $safe = false ) { return $this->send_request( 'POST', $params, $safe ); } /* * Send a request to the API. * * @param string $method The HTTP method (GET or POST). * @param array $params The request parameters. * @param bool $safe Send safe request WP functions or not, default to not. * @return mixed The response from the API, or WP_Error if a timeout is active. / private function send_request( $method, $params = [], $safe = false ) { $api_url = $this->get_api_url(); $transient_key = $this->get_transient_key(); if ( get_transient( $transient_key . '_timeout_active' ) ) { return new WP_Error( 429, __( 'Too many requests.', 'rocket' ) ); } // Get previous_expiration early to avoid multiple parallel requests increasing the expiration multiple times. $previous_expiration = (int) get_transient( $transient_key . '_timeout' ); $params['method'] = strtoupper( $method ); $response = $this->send_remote_request( $api_url, $method, $params, $safe ); if ( is_wp_error( $response ) ) { $this->set_timeout_transients( $previous_expiration ); return $response; } $body = wp_remote_retrieve_body( $response ); if ( empty( $body ) \|\| ( is_array( $response ) && ! empty( $response['response']['code'] ) && 200 !== $response['response']['code'] ) ) { $this->set_timeout_transients( $previous_expiration ); return new WP_Error( 500, __( 'Not valid response.', 'rocket' ) ); } $this->delete_timeout_transients(); return $response; } /* * Set the timeout transients. * * @param string $previous_expiration The previous value of _timeout_active transient. / private function set_timeout_transients( $previous_expiration ) { $transient_key = $this->get_transient_key(); $expiration = ( 0 === $previous_expiration ) ? 300 : ( 2 $previous_expiration <= DAY_IN_SECONDS ? 2 * $previous_expiration : DAY_IN_SECONDS ); set_transient( $transient_key . '_timeout', $expiration, WEEK_IN_SECONDS ); set_transient( $transient_key . '_timeout_active', true, $expiration ); } /** * Delete the timeout transients. * * This method deletes the timeout transients for the API requests. It uses the transient key obtained from the `get_transient_key` method. * The transients deleted are: * - `{transient_key}_timeout_active`: This transient indicates if a timeout is currently active. * - `{transient_key}_timeout`: This transient stores the timeout duration. * * @return void / private function delete_timeout_transients() { $transient_key = $this->get_transient_key(); delete_transient( $transient_key . '_timeout_active' ); delete_transient( $transient_key . '_timeout' ); } /* * Decide which WP core function will be used to send the request based on the params. * * @param string $api_url API Url. * @param string $method Request method (GET or POST). * @param array $params Parameters being sent with the request. * @param bool $safe Send safe request WP functions or not, default to not. * @return array\|WP_Error */ private function send_remote_request( $api_url, $method, $params, $safe ) { if ( ! $safe ) { return wp_remote_request( $api_url, $params ); } unset( $params['method'] ); switch ( $method ) { case 'GET': return wp_safe_remote_get( $api_url, $params ); case 'POST': return wp_safe_remote_post( $api_url, $params ); } return new WP_Error( 400, __( 'Not valid request type.', 'rocket' ) ); } }

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