feat: add Next 13 request header mutation to middleware

.github/workflows/test-deno.yml

@@ -0,0 +1,21 @@
+name: Deno tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Git Checkout Deno Module
+        uses: actions/checkout@v2
+      - name: Use Deno Version ${{ matrix.deno-version }}
+        uses: denolib/setup-deno@v2
+        with:
+          deno-version: vx.x.x
+      - name: Test Deno
+        run: deno test packages/runtime/src/templates/edge-shared/

demos/middleware/middleware.ts

@@ -8,6 +8,18 @@ export async function middleware(req: NextRequest) {
   let response
   const { pathname } = req.nextUrl
 
+  if (pathname.startsWith('/api/hello')) {
+    // Next 13 request header mutation functionality
+    const headers = new Headers(req.headers)
+
+    headers.set('x-hello', 'world')
+    return NextResponse.next({
+      request: {
+        headers
+      }
+    })
+  }
+
   const request = new MiddlewareRequest(req)
   if (pathname.startsWith('/static')) {
     // Unlike NextResponse.next(), this actually sends the request to the origin
@@ -24,12 +36,6 @@ export async function middleware(req: NextRequest) {
     return res
   }
 
-  if (pathname.startsWith('/api/hello')) {
-    // Add a header to the request
-    req.headers.set('x-hello', 'world')
-    return request.next()
-  }
-
   if (pathname.startsWith('/api/geo')) {
     req.headers.set('x-geo-country', req.geo.country)
     req.headers.set('x-geo-region', req.geo.region)

package.json

@@ -18,6 +18,7 @@
     "postinstall": "run-s build install-husky",
     "install-husky": "if-env CI=1 || husky install node_modules/@netlify/eslint-config-node/.husky",
     "test": "run-s build:demo test:jest",
+    "test:deno": "deno test packages/runtime/src/templates/edge-shared/",
     "test:next": "jest -c test/e2e/jest.config.js",
     "test:next:disabled": "RUN_SKIPPED_TESTS=1 jest -c test/e2e/jest.config.disabled.js",
     "test:next:all": "RUN_SKIPPED_TESTS=1 jest -c test/e2e/jest.config.all.js",
@@ -101,7 +102,8 @@
       "**/test/**/*.spec.ts",
       "!**/test/e2e/**",
       "!**/test/fixtures/**",
-      "!**/test/sample/**"
+      "!**/test/sample/**",
+      "!**/test/templates/edge-shared/**"
     ],
     "transform": {
       "\\.[jt]sx?$": "babel-jest"