From 24887c7ebe404bc238756f41b9ab783d49e15017 Mon Sep 17 00:00:00 2001
From: orisrightpaw <cirro@snep.lol>
Date: Tue, 17 Jun 2025 23:51:18 -0400
Subject: [PATCH 1/3] feat: add signal property to request in vite, node
 environments

---
 .changeset/twelve-jokes-prove.md       | 6 ++++++
 packages/kit/src/exports/node/index.js | 8 ++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 .changeset/twelve-jokes-prove.md

diff --git a/.changeset/twelve-jokes-prove.md b/.changeset/twelve-jokes-prove.md
new file mode 100644
index 000000000000..88fa8c65f40f
--- /dev/null
+++ b/.changeset/twelve-jokes-prove.md
@@ -0,0 +1,6 @@
+---
+'@sveltejs/adapter-node': minor
+'@sveltejs/kit': minor
+---
+
+feat: add signal property to request in vite, node environments
diff --git a/packages/kit/src/exports/node/index.js b/packages/kit/src/exports/node/index.js
index a69b7ae6d906..684ed103bdb3 100644
--- a/packages/kit/src/exports/node/index.js
+++ b/packages/kit/src/exports/node/index.js
@@ -120,11 +120,19 @@ export async function getRequest({ request, base, bodySizeLimit }) {
 		delete headers[':scheme'];
 	}
 
+	const controller = new AbortController();
+	request.once('close', () => {
+		if (request.readableAborted) {
+			controller.abort();
+		}
+	});
+
 	return new Request(base + request.url, {
 		// @ts-expect-error
 		duplex: 'half',
 		method: request.method,
 		headers: Object.entries(headers),
+		signal: controller.signal,
 		body:
 			request.method === 'GET' || request.method === 'HEAD'
 				? undefined

From 2654850d962066e2b89da751197deea8bd109e4b Mon Sep 17 00:00:00 2001
From: orisrightpaw <cirro@snep.lol>
Date: Wed, 18 Jun 2025 00:11:39 -0400
Subject: [PATCH 2/3] docs: describe signal property behavior in adapter-node

---
 .../25-build-and-deploy/40-adapter-node.md    | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/documentation/docs/25-build-and-deploy/40-adapter-node.md b/documentation/docs/25-build-and-deploy/40-adapter-node.md
index ce0a5bccf95f..c0050705f1c3 100644
--- a/documentation/docs/25-build-and-deploy/40-adapter-node.md
+++ b/documentation/docs/25-build-and-deploy/40-adapter-node.md
@@ -263,3 +263,49 @@ app.listen(3000, () => {
 	console.log('listening on port 3000');
 });
 ```
+
+## Aborted requests
+
+> [!NOTE] This feature is available in `vite dev` and `vite preview` servers.
+
+The adapter will fire an `abort` event when the incoming request is cancelled before completion. You can access the [AbortSignal](https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal) via `event.request.signal`.  
+  
+A pretty typical example of using the `signal` property:
+
+```js
+/// file: src/routes/api/object/[slug]/+server.js
+/** @type {import('./$types').RequestHandler} */
+export async function GET({ request, params }) {
+    const stream = await s3.getObject("bucket", params.slug, {
+        signal: request.signal
+    }) 
+
+    return new Response(stream)
+}
+```
+  
+Another example, this time using [Server-Sent Events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events):
+
+```js
+/// file: src/routes/api/sse/+server.js
+/** @type {import('./$types').RequestHandler} */
+export async function GET({ request }) {
+    const stream = new ReadableStream({
+        start(controller) {
+            const interval = setInterval(() => {
+                controller.enqueue("data: Hello, world!\n\n\n");
+            }, 1000);
+
+            request.signal.onabort = () => {
+                clearInterval(interval);
+            };
+        },
+    });
+
+    return new Response(stream, {
+        headers: {
+            "Content-Type": "text/event-stream",
+        },
+    });
+}
+```
\ No newline at end of file

From 1396477c5975cdcf2209de2cb7d726242aa4757c Mon Sep 17 00:00:00 2001
From: orisrightpaw <cirro@snep.lol>
Date: Wed, 18 Jun 2025 00:17:15 -0400
Subject: [PATCH 3/3] docs: remove unnecessary async in example

---
 documentation/docs/25-build-and-deploy/40-adapter-node.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/documentation/docs/25-build-and-deploy/40-adapter-node.md b/documentation/docs/25-build-and-deploy/40-adapter-node.md
index c0050705f1c3..7c51c77ca377 100644
--- a/documentation/docs/25-build-and-deploy/40-adapter-node.md
+++ b/documentation/docs/25-build-and-deploy/40-adapter-node.md
@@ -289,7 +289,7 @@ Another example, this time using [Server-Sent Events](https://developer.mozilla.
 ```js
 /// file: src/routes/api/sse/+server.js
 /** @type {import('./$types').RequestHandler} */
-export async function GET({ request }) {
+export function GET({ request }) {
     const stream = new ReadableStream({
         start(controller) {
             const interval = setInterval(() => {