add node middleware

Author: conico974

examples/experimental/next.config.ts

@@ -9,6 +9,7 @@ const nextConfig: NextConfig = {
   },
   experimental: {
     ppr: "incremental",
+    nodeMiddleware: true,
   },
 };
 

examples/experimental/src/middleware.ts

@@ -0,0 +1,27 @@
+import { type NextRequest, NextResponse } from "next/server";
+import crypto from "node:crypto";
+
+export default function middleware(request: NextRequest) {
+  if (request.nextUrl.pathname === "/api/hello") {
+    return NextResponse.json({
+      name: "World",
+    });
+  }
+  if (request.nextUrl.pathname === "/redirect") {
+    return NextResponse.redirect(new URL("/", request.url));
+  }
+  if (request.nextUrl.pathname === "/rewrite") {
+    return NextResponse.rewrite(new URL("/", request.url));
+  }
+
+  return NextResponse.next({
+    headers: {
+      "x-middleware-test": "1",
+      "x-random-node": crypto.randomUUID(),
+    },
+  });
+}
+
+export const config = {
+  runtime: "nodejs",
+};

packages/tests-e2e/tests/experimental/nodeMiddleware.test.ts

@@ -0,0 +1,29 @@
+import { expect, test } from "@playwright/test";
+
+test("Node middleware should add headers", async ({ request }) => {
+  const resp = await request.get("/");
+  expect(resp.status()).toEqual(200);
+  const headers = resp.headers();
+  expect(headers["x-middleware-test"]).toEqual("1");
+  expect(headers["x-random-node"]).toBeDefined();
+});
+
+test("Node middleware should return json", async ({ request }) => {
+  const resp = await request.get("/api/hello");
+  expect(resp.status()).toEqual(200);
+  const json = await resp.json();
+  expect(json).toEqual({ name: "World" });
+});
+
+test("Node middleware should redirect", async ({ page }) => {
+  await page.goto("/redirect");
+  await page.waitForURL("/");
+  const el = page.getByText("Incremental PPR");
+  await expect(el).toBeVisible();
+});
+
+test("Node middleware should rewrite", async ({ page }) => {
+  await page.goto("/rewrite");
+  const el = page.getByText("Incremental PPR");
+  await expect(el).toBeVisible();
+});