.255.48.146'  => '',   // GT Metrix - Vancouver 18.
			'172.255.48.147'  => '',   // GT Metrix - Vancouver 19.
			'52.229.122.240'  => '',   // GT Metrix - Quebec City.
			'104.214.72.101'  => '',   // GT Metrix - San Antonio, TX 1.
			'13.66.7.11'      => '',   // GT Metrix - San Antonio, TX 2.
			'13.85.24.83'     => '',   // GT Metrix - San Antonio, TX 3.
			'13.85.24.90'     => '',   // GT Metrix - San Antonio, TX 4.
			'13.85.82.26'     => '',   // GT Metrix - San Antonio, TX 5.
			'40.74.242.253'   => '',   // GT Metrix - San Antonio, TX 6.
			'40.74.243.13'    => '',   // GT Metrix - San Antonio, TX 7.
			'40.74.243.176'   => '',   // GT Metrix - San Antonio, TX 8.
			'104.214.48.247'  => '',   // GT Metrix - San Antonio, TX 9.
			'157.55.189.189'  => '',   // GT Metrix - San Antonio, TX 10.
			'104.214.110.135' => '',   // GT Metrix - San Antonio, TX 11.
			'70.37.83.240'    => '',   // GT Metrix - San Antonio, TX 12.
			'65.52.36.250'    => '',   // GT Metrix - San Antonio, TX 13.
			'13.78.216.56'    => '',   // GT Metrix - Cheyenne, WY.
			'52.162.212.163'  => '',   // GT Metrix - Chicago, IL.
			'23.96.34.105'    => '',   // GT Metrix - Danville, VA.
			'65.52.113.236'   => '',   // GT Metrix - San Francisco, CA.
			'172.255.61.34'   => '',   // GT Metrix - London 1.
			'172.255.61.35'   => '',   // GT Metrix - London 2.
			'172.255.61.36'   => '',   // GT Metrix - London 3.
			'172.255.61.37'   => '',   // GT Metrix - London 4.
			'172.255.61.38'   => '',   // GT Metrix - London 5.
			'172.255.61.39'   => '',   // GT Metrix - London 6.
			'172.255.61.40'   => '',   // GT Metrix - London 7.
			'52.237.235.185'  => '',   // GT Metrix - Sydney 1.
			'52.237.250.73'   => '',   // GT Metrix - Sydney 2.
			'52.237.236.145'  => '',   // GT Metrix - Sydney 3.
			'104.41.2.19'     => '',   // GT Metrix - São Paulo 1.
			'191.235.98.164'  => '',   // GT Metrix - São Paulo 2.
			'191.235.99.221'  => '',   // GT Metrix - São Paulo 3.
			'191.232.194.51'  => '',   // GT Metrix - São Paulo 4.
			'104.211.143.8'   => '',   // GT Metrix - Mumbai 1.
			'104.211.165.53'  => '',   // GT Metrix - Mumbai 2.
			'52.172.14.87'    => '',   // GT Metrix - Chennai.
			'40.83.89.214'    => '',   // GT Metrix - Hong Kong 1.
			'52.175.57.81'    => '',   // GT Metrix - Hong Kong 2.
			'20.188.63.151'   => '',   // GT Metrix - Paris.
			'20.52.36.49'     => '',   // GT Metrix - Frankfurt.
			'52.246.165.153'  => '',   // GT Metrix - Tokyo.
			'51.144.102.233'  => '',   // GT Metrix - Amsterdam.
			'13.76.97.224'    => '',   // GT Metrix - Singapore.
			'102.133.169.66'  => '',   // GT Metrix - Johannesburg.
			'52.231.199.170'  => '',   // GT Metrix - Busan.
			'13.53.162.7'     => '',   // GT Metrix - Stockholm.
			'40.123.218.94'   => '',   // GT Metrix - Dubai.
		];

		if ( isset( $ips[ $this->get_ip() ] ) ) {
			return self::memoize( __FUNCTION__, [], true );
		}

		if ( ! $this->config->get_server_input( 'HTTP_USER_AGENT' ) ) {
			return self::memoize( __FUNCTION__, [], false );
		}

		$user_agent = preg_match( '#PingdomPageSpeed|DareBoost|Google|PTST|Chrome-Lighthouse|WP Rocket#i', $this->config->get_server_input( 'HTTP_USER_AGENT' ) );

		return self::memoize( __FUNCTION__, [], (bool) $user_agent );
	}

	/**
	 * Determines if SSL is used.
	 * This is basically a copy of the WP function, where $_SERVER is not used directly.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return bool True if SSL, otherwise false.
	 */
	public function is_ssl() {
		if ( null !== $this->config->get_server_input( 'HTTPS' ) ) {
			if ( 'on' === strtolower( $this->config->get_server_input( 'HTTPS' ) ) ) {
				return true;
			}

			if ( '1' === (string) $this->config->get_server_input( 'HTTPS' ) ) {
				return true;
			}
		} elseif ( '443' === (string) $this->config->get_server_input( 'SERVER_PORT' ) ) {
			return true;
		}
		return false;
	}

	/** ----------------------------------------------------------------------------------------- */
	/** REQUEST URI AND METHOD ================================================================== */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Get the request URI.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return string
	 */
	public function get_raw_request_uri() {
		if ( '' === $this->config->get_server_input( 'REQUEST_URI', '' ) ) {
			return '';
		}

		return '/' . ltrim( $this->config->get_server_input( 'REQUEST_URI' ), '/' );
	}

	/**
	 * Get the request URI without the query strings.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return string
	 */
	public function get_request_uri_base() {
		$request_uri = $this->get_raw_request_uri();

		if ( ! $request_uri ) {
			return '';
		}

		$request_uri = explode( '?', $request_uri );

		return reset( $request_uri );
	}

	/**
	 * Get the request URI. The query string is sorted and some parameters are removed.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return string
	 */
	public function get_clean_request_uri() {
		$request_uri = $this->get_request_uri_base();

		if ( ! $request_uri ) {
			return '';
		}

		$query_string = $this->get_query_string();

		if ( ! $query_string ) {
			return $request_uri;
		}

		return $request_uri . '?' . $query_string;
	}

	/**
	 * Get the request method.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return string
	 */
	public function get_request_method() {
		if ( '' === $this->config->get_server_input( 'REQUEST_METHOD', '' ) ) {
			return '';
		}

		return strtoupper( $this->config->get_server_input( 'REQUEST_METHOD' ) );
	}

	/** ----------------------------------------------------------------------------------------- */
	/** QUERY STRING ============================================================================ */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Get the query string as an array. Parameters are sorted and some are removed.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return array
	 */
	public function get_query_params() {
		if ( ! self::$get ) {
			return [];
		}

		// Remove some parameters.
		$params = array_diff_key(
			self::$get,
			$this->config->get_config( 'cache_ignored_parameters' )
		);

		if ( $params ) {
			ksort( $params );
		}

		return $params;
	}

	/**
	 * Get the query string with sorted parameters, and some other removed.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return string
	 */
	public function get_query_string() {
		return http_build_query( $this->get_query_params() );
	}

	/**
	 * Get the original query string
	 *
	 * @since  3.11.4
	 *
	 * @return string
	 */
	public function get_original_query_string() {
		return http_build_query( $this->get_get() );
	}

	/** ----------------------------------------------------------------------------------------- */
	/** PROPERTY GETTERS ======================================================================== */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Get the `cookies` property.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return array
	 */
	public function get_cookies() {
		return self::$cookies;
	}

	/**
	 * Get the `post` property.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return array
	 */
	public function get_post() {
		return self::$post;
	}

	/**
	 * Get the `get` property.
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return array
	 */
	public function get_get() {
		return self::$get;
	}

	/** ----------------------------------------------------------------------------------------- */
	/** ERRORS ================================================================================== */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Set an "error".
	 *
	 * @since  3.3
	 * @access protected
	 * @author Grégory Viguier
	 *
	 * @param string $message A message.
	 * @param array  $data    Related data.
	 */
	protected function set_error( $message, $data = [] ) {
		$this->last_error = [
			'message' => $message,
			'data'    => (array) $data,
		];
	}

	/**
	 * Get the last "error".
	 *
	 * @since  3.3
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return array
	 */
	public function get_last_error() {
		return array_merge(
			[
				'message' => '',
				'data'    => [],
			],
			(array) $this->last_error
		);
	}
}