Fix "res.writeHead is not a function" in Express/node middleware

.changeset/olive-knives-rush.md

@@ -0,0 +1,5 @@
+---
+'@astrojs/node': patch
+---
+
+fix issuse #7590 "res.writeHead is not a function" in Express/Node middleware

packages/integrations/node/src/nodeMiddleware.ts

@@ -1,17 +1,27 @@
 import type { NodeApp } from 'astro/app/node';
-import type { IncomingMessage, ServerResponse } from 'node:http';
+import type { ServerResponse } from 'node:http';
 import type { Readable } from 'stream';
 import { createOutgoingHttpHeaders } from './createOutgoingHttpHeaders';
 import { responseIterator } from './response-iterator';
-import type { Options } from './types';
+import type { ErrorHandlerParams, Options, RequestHandlerParams } from './types';
 
 export default function (app: NodeApp, mode: Options['mode']) {
-	return async function (
-		req: IncomingMessage,
-		res: ServerResponse,
-		next?: (err?: unknown) => void,
-		locals?: object
-	) {
+	return async function (...args: RequestHandlerParams | ErrorHandlerParams) {
+		let error = null;
+		let [req, res, next, locals] = args as RequestHandlerParams;
+
+		if (args[0] instanceof Error) {
+			[error, req, res, next, locals] = args as ErrorHandlerParams;
+
+			if (error) {
+				if (next) {
+					return next(error);
+				} else {
+					throw error;
+				}
+			}
+		}
+
 		try {
 			const route =
 				mode === 'standalone' ? app.match(req, { matchNotFound: true }) : app.match(req);

packages/integrations/node/src/types.ts

@@ -1,3 +1,5 @@
+import { IncomingMessage, ServerResponse } from 'node:http';
+
 export interface UserOptions {
 	/**
 	 * Specifies the mode that the adapter builds to.
@@ -14,3 +16,12 @@ export interface Options extends UserOptions {
 	server: string;
 	client: string;
 }
+
+export type RequestHandlerParams = [
+	req: IncomingMessage,
+	res: ServerResponse,
+	next?: (err?: unknown) => void,
+	locals?: object
+];
+
+export type ErrorHandlerParams = [unknown, ...RequestHandlerParams];