Function serverToStopPromise

packages/react-server-cli/src/commands/start.js:23–56

(server)

// returns a method that can be used to stop the server. the returned method
// returns a promise to indicate when the server is actually stopped.
const serverToStopPromise = (server) => {

	const sockets = [];

	// If we're testing then we want to be able to bail out quickly.  Zombie
	// (the test browser) makes keepalive connections to our static asset
	// server, and we don't need to be polite to it when we're tearing down.
	if (process.env.NODE_ENV === "test") { // eslint-disable-line no-process-env
		server.on('connection', socket => sockets.push(socket));
	}

	return () => {
		return new Promise((resolve, reject) => {

			// This will only have anything if we're testing.  See above.
			sockets.forEach(socket => socket.destroy());

			server.on('error', (e) => {
				logger.error('An error was emitted while shutting down the server');
				logger.error(e);
				reject(e);
			});
			server.close((e) => {
				if (e) {
					logger.error('The server was not started, so it cannot be stopped.');
					logger.error(e);
					reject(e);
					return;
				}
				resolve();
			});
		});
	};
};