Fixes cookies being set by middleware

.changeset/lazy-falcons-divide.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix cookies not being set by middleware

packages/astro/src/core/render/context.ts

@@ -1,4 +1,5 @@
 import type {
+	AstroCookies,
 	ComponentInstance,
 	Params,
 	Props,
@@ -23,6 +24,7 @@ export interface RenderContext {
 	componentMetadata?: SSRResult['componentMetadata'];
 	route?: RouteData;
 	status?: number;
+	cookies?: AstroCookies;
 	params: Params;
 	props: Props;
 }

packages/astro/src/core/render/core.ts

@@ -138,6 +138,7 @@ export async function renderPage({ mod, renderContext, env, apiContext }: Render
 		scripts: renderContext.scripts,
 		ssr: env.ssr,
 		status: renderContext.status ?? 200,
+		cookies: apiContext?.cookies,
 		locals,
 	});
 

packages/astro/src/core/render/result.ts

@@ -53,6 +53,7 @@ export interface CreateResultArgs {
 	request: Request;
 	status: number;
 	locals: App.Locals;
+	cookies?: AstroCookies;
 }
 
 function getFunctionExpression(slot: any) {
@@ -155,7 +156,7 @@ export function createResult(args: CreateResultArgs): SSRResult {
 	});
 
 	// Astro.cookies is defined lazily to avoid the cost on pages that do not use it.
-	let cookies: AstroCookies | undefined = undefined;
+	let cookies: AstroCookies | undefined = args.cookies;
 	let componentMetadata = args.componentMetadata ?? new Map();
 
 	// Create the result object that will be passed into the render function.

packages/astro/test/fixtures/middleware-dev/src/middleware.js

@@ -19,6 +19,10 @@ const first = defineMiddleware(async (context, next) => {
 			headers: response.headers,
 		});
 	} else {
+		if(context.url.pathname === '/') {
+			context.cookies.set('foo', 'bar');
+		}
+
 		context.locals.name = 'bar';
 	}
 	return await next();

packages/astro/test/middleware.test.js

@@ -66,6 +66,11 @@ describe('Middleware in DEV mode', () => {
 		let $ = cheerio.load(html);
 		expect($('title').html()).to.equal('MiddlewareNoDataOrNextCalled');
 	});
+
+	it('should allow setting cookies', async () => {
+		let res = await fixture.fetch('/');
+		expect(res.headers.get('set-cookie')).to.equal('foo=bar');
+	});
 });
 
 describe('Middleware in PROD mode, SSG', () => {