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Editing: api-request.php

<?php

/**
 * Legacy API Request class. Used by most Reports and legacy Measurement Protocol calls.
 *
 * @since 7.0.0
 *
 * @package MonsterInsights
 * @author  Chris Christoff
 */
final class MonsterInsights_API_Request {

/**
	 * Base API route.
	 *
	 * @since 7.0.0
	 *
	 * @var string
	 */
	public $base = 'api.monsterinsights.com/v2/';

/**
	 * Current API route.
	 *
	 * @since 7.0.0
	 *
	 * @var bool|string
	 */
	public $route = false;

/**
	 * Full API URL endpoint.
	 *
	 * @since 7.0.0
	 *
	 * @var bool|string
	 */
	public $url = false;

/**
	 * Current API method.
	 *
	 * @since 7.0.0
	 *
	 * @var bool|string
	 */
	public $method = false;

/**
	 * Is a network request.
	 *
	 * @since 7.2.0
	 *
	 * @var bool
	 */
	public $network = false;

/**
	 * API token.
	 *
	 * @since 7.0.0
	 *
	 * @var bool|string
	 */
	public $token = false;

/**
	 * API Key.
	 *
	 * @since 7.0.0
	 *
	 * @var bool|string
	 */
	public $key = false;

/**
	 * API tt.
	 *
	 * @since 7.0.0
	 *
	 * @var bool|string
	 */
	public $tt = false;

/**
	 * API return.
	 *
	 * @since 7.0.0
	 *
	 * @var bool|string
	 */
	public $return = false;

/**
	 * Start date.
	 *
	 * @since 7.0.0
	 *
	 * @var string
	 */
	public $start = '';

/**
	 * End Date.
	 *
	 * @since 7.0.0
	 *
	 * @var string
	 */
	public $end = '';

/**
	 * Plugin slug.
	 *
	 * @since 7.0.0
	 *
	 * @var bool|string
	 */
	public $plugin = false;

/**
	 * URL to test connection with.
	 *
	 * @since 7.3.2
	 *
	 * @var string
	 */
	public $testurl = '';

/**
	 * Store license.
	 */
	public $license;

/**
	 * Store version.
	 */
	public $miversion;

/**
	 * Site secret key.
	 */
	public $sitei;

/**
	 * Compare end date.
	 *
	 * @var string
	 */
	protected $compare_end;

/**
	 * Compare start date.
	 *
	 * @var string
	 */
	protected $compare_start;

/**
	 * Site URL.
	 *
	 * @var string
	 */
	public $site_url;

/**
	 * Additional data to add to request body
	 *
	 * @since 7.0.0
	 *
	 * @var array
	 */
	protected $additional_data = array();

/**
	 * Primary class constructor.
	 *
	 * @param string $route The API route to target.
	 * @param array  $args Array of API credentials.
	 * @param string $method The API method.
	 *
	 * @since 7.0.0
	 */
	public function __construct( $route, $args, $method = 'POST' ) {

// Set class properties.
		$this->base     = trailingslashit( monsterinsights_get_api_url() );
		$this->route    = $route;
		$this->url      = trailingslashit( 'https://' . $this->base . $this->route );
		$this->method   = $method;
		$this->network  = is_network_admin() || ! empty( $args['network'] );

$default_token = $this->network ? MonsterInsights()->auth->get_network_token() : MonsterInsights()->auth->get_token();
		$default_key   = $this->network ? MonsterInsights()->auth->get_network_key() : MonsterInsights()->auth->get_key();

$this->token  = ! empty( $args['token'] ) ? $args['token'] : $default_token;
		$this->key    = ! empty( $args['key'] ) ? $args['key'] : $default_key;
		$this->tt     = ! empty( $args['tt'] ) ? $args['tt'] : '';
		$this->return = ! empty( $args['return'] ) ? $args['return'] : '';
		$this->start  = ! empty( $args['start'] ) ? $args['start'] : '';
		$this->end    = ! empty( $args['end'] ) ? $args['end'] : '';

$this->compare_start = ! empty( $args['compare_start'] ) ? $args['compare_start'] : '';
		$this->compare_end   = ! empty( $args['compare_end'] ) ? $args['compare_end'] : '';

// We need to do this hack so that the network panel + the site_url of the main site are distinct
		$this->site_url = is_network_admin() ? network_admin_url() : home_url();

if ( monsterinsights_is_pro_version() ) {
			$this->license = $this->network ? MonsterInsights()->license->get_network_license_key() : MonsterInsights()->license->get_site_license_key();
		}
		$this->plugin    = MonsterInsights()->plugin_slug;
		$this->miversion = MONSTERINSIGHTS_VERSION;
		$this->sitei     = ! empty( $args['sitei'] ) ? $args['sitei'] : '';
		$this->testurl   = ! empty( $args['testurl'] ) ? $args['testurl'] : '';
	}

/**
	 * Processes the API request.
	 *
	 * @return mixed $value The response to the API call.
	 * @since 7.0.0
	 */
	public function request( $extra_params = [] ) {
		// Make sure we're not blocked
		$blocked = $this->is_blocked( $this->url );
		if ( $blocked || is_wp_error( $blocked ) ) {
			if ( is_wp_error( $blocked ) ) {
				// Translators: Placeholder gets replaced with the error message.
				return new WP_Error( 'api-error', sprintf( __( 'The firewall of your server is blocking outbound calls. Please contact your hosting provider to fix this issue. %s', 'google-analytics-for-wordpress' ), $blocked->get_error_message() ) );
			} else {
				return new WP_Error( 'api-error', __( 'The firewall of your server is blocking outbound calls. Please contact your hosting provider to fix this issue.', 'google-analytics-for-wordpress' ) );
			}
		}

// Build the body of the request.
		$body = array();

if ( ! empty( $this->token ) ) {
			$body['token'] = $this->token;
		}

if ( ! empty( $this->key ) ) {
			$body['key'] = $this->key;
		}

if ( ! empty( $this->tt ) ) {
			$body['tt'] = $this->tt;
		}

if ( ! empty( $this->return ) ) {
			$body['return'] = $this->return;
		}

if ( monsterinsights_is_pro_version() && ! empty( $this->license ) ) {
			$body['license'] = $this->license;
		}

if ( ! empty( $this->start ) ) {
			$body['start'] = $this->start;
		}

if ( ! empty( $this->end ) ) {
			$body['end'] = $this->end;
		}

if ( ! empty( $this->compare_start ) ) {
			$body['compare_start'] = $this->compare_start;
		}

if ( ! empty( $this->compare_end ) ) {
			$body['compare_end'] = $this->compare_end;
		}

if ( ! empty( $this->sitei ) ) {
			$body['sitei'] = $this->sitei;
		}

$body['siteurl']   = $this->site_url;
		$body['miversion'] = $this->miversion;

// If a plugin API request, add the data.
		if ( 'info' == $this->route || 'update' == $this->route ) {
			$body['miapi-plugin'] = $this->plugin;
		}

// Add in additional data if needed.
		if ( ! empty( $this->additional_data ) ) {
			$body['miapi-data'] = maybe_serialize( $this->additional_data );
		}

if ( 'GET' == $this->method ) {
			$body['time'] = time(); // just to avoid caching
		}

$body['wp_timezone'] = wp_timezone_string(); // Timezone from WP Settings.

$body['timezone'] = date( 'e' ); // phpcs:ignore WordPress.DateTime.RestrictedFunctions.date_date -- We need this to depend on the runtime timezone.

$body['network'] = $this->network ? 'network' : 'site';

$body['ip'] = ! empty( $_SERVER['SERVER_ADDR'] ) ? sanitize_text_field(wp_unslash($_SERVER['SERVER_ADDR'])) : '';

// This filter will be removed in the future.
		$body = apply_filters( 'monsterinsights_api_request_body', $body );

$body = array_merge($body, $extra_params);

$string = http_build_query( $body, '', '&' );

// Build the headers of the request.
		$headers = array(
			'Content-Type'  => 'application/x-www-form-urlencoded',
			'Cache-Control' => 'no-store, no-cache, must-revalidate, max-age=0, post-check=0, pre-check=0',
			'Pragma'        => 'no-cache',
			'Expires'       => 0,
			'MIAPI-Referer' => is_network_admin() ? network_admin_url() : site_url(),
			'MIAPI-Sender'  => 'WordPress',
		);

// Setup data to be sent to the API.
		$data = array(
			'headers'    => $headers,
			'body'       => $body,
			'timeout'    => 3000, // phpcs:ignore
			'user-agent' => 'MI/' . MONSTERINSIGHTS_VERSION . '; ' . $this->site_url,
			'sslverify'  => false,
		);

// Perform the query and retrieve the response.
		$response = 'GET' == $this->method ? wp_remote_get( esc_url_raw( $this->url ) . '?' . $string, $data ) : wp_remote_post( esc_url_raw( $this->url ), $data );

if ( is_wp_error( $response ) ) {
			return $response;
		}

$response_code = wp_remote_retrieve_response_code( $response );
		$response_body = json_decode( wp_remote_retrieve_body( $response ), true );
		// return new WP_Error( 'debug', '<pre>' . var_export( $response_body, true ) . '</pre>' );
		// var_dump( $response_body );
		// Bail out early if there are any errors.
		if ( is_wp_error( $response_body ) ) {
			return $response_body;
		}

// If not a 200 status header, send back error.
		if ( 200 != $response_code && 204 != $response_code) {
			$type = ! empty( $response_body['type'] ) ? $response_body['type'] : 'api-error';

if ( empty( $response_code ) ) {
				// Translators: Support link tag starts with url and Support link tag ends.
				$message = sprintf(
					esc_html__( 'Oops! We encountered an error. Please wait a few minutes and try again. If the issue persists, please %1$scontact our support%2$s team.', 'google-analytics-for-wordpress' ),
					'<a target="_blank" href="' . monsterinsights_get_url( 'notice', 'unknown-api-error', 'https://www.monsterinsights.com/my-account/support/' ) . '">',
					'</a>'
				);

return new WP_Error( $type, $message );
			}

if ( empty( $response_body ) || ( empty( $response_body['message'] ) && empty( $response_body['error'] ) ) ) {
				// Translators: Support link tag starts with url, Support link tag ends and placeholder adds the response code.
				$message = sprintf(
					esc_html__( 'Oops! We ran into a problem. Please try again in a few minutes. If the issue persists please %1$scontact our support%2$s team. Error: API returned a %3$s%4$s%5$s response.', 'google-analytics-for-wordpress' ),
					'<a target="_blank" href="' . monsterinsights_get_url( 'notice', 'unknown-api-error', 'https://www.monsterinsights.com/my-account/support/' ) . '">',
					'</a>',
					'',
					$response_code,
					''
				);

return new WP_Error( $type, $message );
			}

if ( ! empty( $response_body['message'] ) ) {
				// Translators: Support link tag starts with url, Support link tag ends, placeholder adds the response code and response message.
				$message = sprintf(
					esc_html__( 'Oops! We ran into a problem. Please try again in a few minutes. If the issue persists please %1$scontact our support%2$s team. Error: API returned a %3$s%4$d: %5$s%6$s', 'google-analytics-for-wordpress' ),
					'<a target="_blank" href="' . monsterinsights_get_url( 'notice', 'unknown-api-error', 'https://www.monsterinsights.com/my-account/support/' ) . '">',
					'</a>',
					'',
					$response_code,
					stripslashes( $response_body['message'] ),
					''
				);

return new WP_Error( $type, $message );
			}

if ( ! empty( $response_body['error'] ) ) {
				// Translators: Support link tag starts with url, Support link tag ends, placeholder adds the response code and response message.
				$message = sprintf(
					esc_html__( 'Oops! We ran into a problem. Please try again in a few minutes. If the issue persists please %1$scontact our support%2$s team. Error: API returned a %3$s%4$d: %5$s%6$s', 'google-analytics-for-wordpress' ),
					'<a target="_blank" href="' . monsterinsights_get_url( 'notice', 'unknown-api-error', 'https://www.monsterinsights.com/my-account/support/' ) . '">',
					'</a>',
					'',
					$response_code,
					stripslashes( $response_body['error'] ),
					''
				);

return new WP_Error( $type, $message );
			}
		}

// If TT required
		if ( ! empty( $this->tt ) ) {
			if ( empty( $response_body['tt'] ) || ! hash_equals( $this->tt, $response_body['tt'] ) ) {
				// TT isn't set on return or doesn't match
				// Translators: Support link tag starts with url and Support link tag ends.
				$message = sprintf(
					esc_html__( 'Oops! We ran into a problem. Please try again in a few minutes. If the issue persists please %1$scontact our support%2$s team. Error: Improper API Request.', 'google-analytics-for-wordpress' ),
					'<a target="_blank" href="' . monsterinsights_get_url( 'notice', 'cannot-verify-license', 'https://www.monsterinsights.com/my-account/support/' ) . '">',
					'</a>'
				);

return new WP_Error( 'validation-error', $message );
			}
		}

// Return the json decoded content.
		return $response_body;
	}

/**
	 * Sets a class property.
	 *
	 * @param string $key The property to set.
	 * @param string $val The value to set for the property.
	 *
	 * @return mixed $value The response to the API call.
	 * @since 7.0.0
	 */
	public function set( $key, $val ) {
		$this->{$key} = $val;
	}

/**
	 * Allow additional data to be passed in the request
	 *
	 * @param array $data
	 * return void
	 *
	 * @since 7.0.0
	 */
	public function set_additional_data( array $data ) {
		$this->additional_data = array_merge( $this->additional_data, $data );
	}

/**
	 * Checks for SSL for making API requests.
	 *
	 * @since 7.0.0
	 *
	 * return bool True if SSL is enabled, false otherwise.
	 */
	public function is_ssl() {
		// Use the base is_ssl check first.
		if ( is_ssl() ) {
			return true;
		} elseif ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) && 'https' == $_SERVER['HTTP_X_FORWARDED_PROTO'] ) {
			// Also catch proxies and load balancers.
			return true;
		} elseif ( defined( 'FORCE_SSL_ADMIN' ) && FORCE_SSL_ADMIN ) {
			return true;
		}

// Otherwise, return false.
		return false;
	}

private function is_blocked( $url = '' ) {
		global $Airplane_Mode_Core;

if ( defined( 'AIRMDE_VER' ) && ! empty( $Airplane_Mode_Core ) && $Airplane_Mode_Core->enabled() ) {
			return new WP_Error( 'api-error', __( 'Oops! The API was unreachable because the plugin, Airplane Mode is active. Please disable and try again.', 'google-analytics-for-wordpress' ) );
		}

// The below page is a testing empty content HTML page used for firewall/router login detection
		// and for image linking purposes in Google Images. We use it to test outbound connections since it is run on google.com
		// and is only a few bytes large. Plus on Google's main CDN so it loads in most places in 0.07 seconds or less. Perfect for our
		// use case of quickly testing outbound connections.
		$testurl = ! empty( $this->testurl ) ? $this->testurl : 'https://www.google.com/blank.html';
		if ( defined( 'WP_HTTP_BLOCK_EXTERNAL' ) && WP_HTTP_BLOCK_EXTERNAL ) {
			if ( defined( 'WP_ACCESSIBLE_HOSTS' ) ) {
				$wp_http = new WP_Http();
				$on_blacklist = $wp_http->block_request( $url );
				if ( $on_blacklist ) {
					return new WP_Error( 'api-error', __( 'Reason: The API was unreachable because the API url is on the WP HTTP blocklist.', 'google-analytics-for-wordpress' ) );
				} else {
					$params = array(
						'sslverify' => false,
						'timeout' => 2,
						'user-agent' => 'MonsterInsights/' . MONSTERINSIGHTS_VERSION,
						'body' => '',
					);
					$response = wp_remote_get( $testurl, $params );
					if ( ! is_wp_error( $response ) && $response['response']['code'] >= 200 && $response['response']['code'] < 300 ) {
						return false;
					} else {
						if ( is_wp_error( $response ) ) {
							return $response;
						} else {
							return new WP_Error( 'api-error', __( 'Reason: The API was unreachable because the call to Google failed.', 'google-analytics-for-wordpress' ) );
						}
					}
				}
			} else {
				return new WP_Error( 'api-error', __( 'Reason: The API was unreachable because no external hosts are allowed on this site.', 'google-analytics-for-wordpress' ) );
			}
		} else {
			$params = array(
				'sslverify' => false,
				'timeout' => 2,
				'user-agent' => 'MonsterInsights/' . MONSTERINSIGHTS_VERSION,
				'body' => '',
			);
			$response = wp_remote_get( $testurl, $params );

if ( ! is_wp_error( $response ) && $response['response']['code'] >= 200 && $response['response']['code'] < 300 ) {
				return false;
			} else {
				if ( is_wp_error( $response ) ) {
					return $response;
				} else {
					return new WP_Error( 'api-error', __( 'Reason: The API was unreachable because the call to Google failed.', 'google-analytics-for-wordpress' ) );
				}
			}
		}
	}
}

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