add ability to pass middleware to @astrojs/node when using standalone…

… mode

packages/integrations/node/src/index.ts

@@ -38,6 +38,9 @@ export default function createIntegration(userOptions: UserOptions): AstroIntegr
 	if (!userOptions?.mode) {
 		throw new AstroError(`Setting the 'mode' option is required.`);
 	}
+	if (userOptions.mode !== 'standalone' && userOptions.standaloneMiddleware) {
+		throw new AstroError(`'standaloneMiddleware' option is only available in 'standalone' mode.`);
+	}
 
 	let _options: Options;
 	return {

packages/integrations/node/src/server.ts

@@ -19,7 +19,9 @@ export function createExports(manifest: SSRManifest, options: Options) {
 		options: options,
 		handler:
 			options.mode === 'middleware' ? createMiddleware(app) : createStandaloneHandler(app, options),
-		startServer: () => startServer(app, options),
+		startServer: () => {
+			startServer(app, options)
+		},
 	};
 }
 

packages/integrations/node/src/standalone.ts

@@ -22,6 +22,14 @@ export default function standalone(app: NodeApp, options: Options) {
 	const host = process.env.HOST ?? hostOptions(options.host);
 	const handler = createStandaloneHandler(app, options);
 	const server = createServer(handler, host, port);
+
+	// optionally add standalone middleware (if passed)
+	if (options.standaloneMiddleware) {
+		import(options.standaloneMiddleware)
+			.then((middleware) => server.server.addListener('request', middleware))
+			.catch(() => {});
+	}
+
 	server.server.listen(port, host);
 	if (process.env.ASTRO_NODE_LOGGING !== 'disabled') {
 		logListeningOn(app.getAdapterLogger(), server.server, options);

packages/integrations/node/src/types.ts

@@ -10,6 +10,10 @@ export interface UserOptions {
 	 * - 'standalone' - Build to a standalone server. The server starts up just by running the built script.
 	 */
 	mode: 'middleware' | 'standalone';
+	/**
+	 * Optional file path that (default) exports middleware function to be used in the standalone mode.
+	 */
+	standaloneMiddleware?: string;
 }
 
 export interface Options extends UserOptions {