rdPress.com.
			 *
			 * @param int Jetpack Blog ID.
			 *
			 * @since 1.7.0
			 * @since-jetpack 4.2.0
			 */
			do_action( 'jetpack_client_authorized', Jetpack_Options::get_option( 'id' ) );

			$tracking->record_user_event( 'jpc_client_authorize_success' );
		}

		$fallback_redirect = apply_filters( 'jetpack_client_authorize_fallback_url', admin_url() );
		$redirect          = wp_validate_redirect( $redirect ) ? $redirect : $fallback_redirect;

		wp_safe_redirect( $redirect );
	}

	/**
	 * The authorhize_redirect webhook handler
	 */
	public function handle_authorize_redirect() {
		$authorize_redirect_handler = new Webhooks\Authorize_Redirect( $this->connection );
		$authorize_redirect_handler->handle();
	}

	/**
	 * The `exit` is wrapped into a method so we could mock it.
	 *
	 * @return never
	 */
	protected function do_exit() {
		exit;
	}

	/**
	 * Handle the `connect_url_redirect` action,
	 * which is usually called to repeat an attempt for user to authorize the connection.
	 *
	 * @return void
	 */
	public function handle_connect_url_redirect() {
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- no site changes.
		$from = ! empty( $_GET['from'] ) ? sanitize_text_field( wp_unslash( $_GET['from'] ) ) : 'iframe';

		// phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- no site changes, sanitization happens in get_authorization_url()
		$redirect = ! empty( $_GET['redirect_after_auth'] ) ? wp_unslash( $_GET['redirect_after_auth'] ) : false;

		add_filter( 'allowed_redirect_hosts', array( Host::class, 'allow_wpcom_environments' ) );

		if ( ! $this->connection->is_user_connected() ) {
			if ( ! $this->connection->is_connected() ) {
				$this->connection->register();
			}

			$connect_url = add_query_arg( 'from', $from, $this->connection->get_authorization_url( null, $redirect ) );

			// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- no site changes.
			if ( isset( $_GET['notes_iframe'] ) ) {
				$connect_url .= '&notes_iframe';
			}
			wp_safe_redirect( $connect_url );
			$this->do_exit();
		} elseif ( ! isset( $_GET['calypso_env'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- no site changes.
			( new CookieState() )->state( 'message', 'already_authorized' );
			wp_safe_redirect( $redirect );
			$this->do_exit();
		} else {
			$connect_url = add_query_arg(
				array(
					'from'               => $from,
					'already_authorized' => true,
				),
				$this->connection->get_authorization_url()
			);
			wp_safe_redirect( $connect_url );
			$this->do_exit();
		}
	}
}