[^<]+)<\/pre>/)
+ if (!match || !match.groups?.rawInput) {
+ console.error(' not found in html input', {
+ html,
+ })
+ throw new Error('Failed to extract data from HTML')
+ }
+
+ const { rawInput } = match.groups
+ const unescapedInput = rawInput.replaceAll('"', '"')
+ try {
+ return JSON.parse(unescapedInput)
+ } catch (originalError) {
+ console.error('Failed to parse JSON', {
+ originalError,
+ rawInput,
+ unescapedInput,
+ })
+ }
+ throw new Error('Failed to extract data from HTML')
+ }
+
+ // those tests hit paths ending with `/json` which has special handling in middleware
+ // to return JSON response from middleware itself
+ test.describe('Middleware response path', () => {
+ test('should match on non-localized not excluded page path', async ({
+ middlewareI18nExcludedPaths,
+ }) => {
+ const response = await fetch(`${middlewareI18nExcludedPaths.url}/json`)
+
+ expect(response.headers.get('x-test-used-middleware')).toBe('true')
+ expect(response.status).toBe(200)
+
+ const { nextUrlPathname, nextUrlLocale } = await response.json()
+
+ expect(nextUrlPathname).toBe('/json')
+ expect(nextUrlLocale).toBe(DEFAULT_LOCALE)
+ })
+
+ test('should match on localized not excluded page path', async ({
+ middlewareI18nExcludedPaths,
+ }) => {
+ const response = await fetch(`${middlewareI18nExcludedPaths.url}/fr/json`)
+
+ expect(response.headers.get('x-test-used-middleware')).toBe('true')
+ expect(response.status).toBe(200)
+
+ const { nextUrlPathname, nextUrlLocale } = await response.json()
+
+ expect(nextUrlPathname).toBe('/json')
+ expect(nextUrlLocale).toBe('fr')
+ })
+ })
+
+ // those tests hit paths that don't end with `/json` while still satisfying middleware matcher
+ // so middleware should pass them through to origin
+ test.describe('Middleware passthrough', () => {
+ test('should match on non-localized not excluded page path', async ({
+ middlewareI18nExcludedPaths,
+ }) => {
+ const response = await fetch(`${middlewareI18nExcludedPaths.url}/html`)
+
+ expect(response.headers.get('x-test-used-middleware')).toBe('true')
+ expect(response.status).toBe(200)
+ expect(response.headers.get('content-type')).toMatch(/text\/html/)
+
+ const html = await response.text()
+ const { locale, params } = extractDataFromHtml(html)
+
+ expect(params).toMatchObject({ catchall: ['html'] })
+ expect(locale).toBe(DEFAULT_LOCALE)
+ })
+
+ test('should match on localized not excluded page path', async ({
+ middlewareI18nExcludedPaths,
+ }) => {
+ const response = await fetch(`${middlewareI18nExcludedPaths.url}/fr/html`)
+
+ expect(response.headers.get('x-test-used-middleware')).toBe('true')
+ expect(response.status).toBe(200)
+ expect(response.headers.get('content-type')).toMatch(/text\/html/)
+
+ const html = await response.text()
+ const { locale, params } = extractDataFromHtml(html)
+
+ expect(params).toMatchObject({ catchall: ['html'] })
+ expect(locale).toBe('fr')
+ })
+ })
+
+ // those tests hit paths that don't satisfy middleware matcher, so should go directly to origin
+ // without going through middleware
+ test.describe('Middleware skipping (paths not satisfying middleware matcher)', () => {
+ test('should NOT match on non-localized excluded API path', async ({
+ middlewareI18nExcludedPaths,
+ }) => {
+ const response = await fetch(`${middlewareI18nExcludedPaths.url}/api/html`)
+
+ expect(response.headers.get('x-test-used-middleware')).not.toBe('true')
+ expect(response.status).toBe(200)
+
+ const { params } = await response.json()
+
+ expect(params).toMatchObject({ catchall: ['html'] })
+ })
+
+ test('should NOT match on non-localized excluded page path', async ({
+ middlewareI18nExcludedPaths,
+ }) => {
+ const response = await fetch(`${middlewareI18nExcludedPaths.url}/excluded`)
+
+ expect(response.headers.get('x-test-used-middleware')).not.toBe('true')
+ expect(response.status).toBe(200)
+ expect(response.headers.get('content-type')).toMatch(/text\/html/)
+
+ const html = await response.text()
+ const { locale, params } = extractDataFromHtml(html)
+
+ expect(params).toMatchObject({ catchall: ['excluded'] })
+ expect(locale).toBe(DEFAULT_LOCALE)
+ })
+
+ test('should NOT match on localized excluded page path', async ({
+ middlewareI18nExcludedPaths,
+ }) => {
+ const response = await fetch(`${middlewareI18nExcludedPaths.url}/fr/excluded`)
+
+ expect(response.headers.get('x-test-used-middleware')).not.toBe('true')
+ expect(response.status).toBe(200)
+ expect(response.headers.get('content-type')).toMatch(/text\/html/)
+
+ const html = await response.text()
+ const { locale, params } = extractDataFromHtml(html)
+
+ expect(params).toMatchObject({ catchall: ['excluded'] })
+ expect(locale).toBe('fr')
+ })
+ })
+})
diff --git a/tests/fixtures/middleware-i18n-excluded-paths/middleware.ts b/tests/fixtures/middleware-i18n-excluded-paths/middleware.ts
new file mode 100644
index 000000000..712f3648b
--- /dev/null
+++ b/tests/fixtures/middleware-i18n-excluded-paths/middleware.ts
@@ -0,0 +1,36 @@
+import { NextResponse } from 'next/server'
+import type { NextRequest } from 'next/server'
+
+export async function middleware(request: NextRequest) {
+ const url = request.nextUrl
+
+ // if path ends with /json we create response in middleware, otherwise we pass it through
+ // to next server to get page or api response from it
+ const response = url.pathname.includes('/json')
+ ? NextResponse.json({
+ requestUrlPathname: new URL(request.url).pathname,
+ nextUrlPathname: request.nextUrl.pathname,
+ nextUrlLocale: request.nextUrl.locale,
+ })
+ : NextResponse.next()
+
+ response.headers.set('x-test-used-middleware', 'true')
+
+ return response
+}
+
+// matcher copied from example in https://nextjs.org/docs/pages/building-your-application/routing/middleware#matcher
+// with `excluded` segment added to exclusion
+export const config = {
+ matcher: [
+ /*
+ * Match all request paths except for the ones starting with:
+ * - api (API routes)
+ * - excluded (for testing localized routes and not just API routes)
+ * - _next/static (static files)
+ * - _next/image (image optimization files)
+ * - favicon.ico, sitemap.xml, robots.txt (metadata files)
+ */
+ '/((?!api|excluded|_next/static|_next/image|favicon.ico|sitemap.xml|robots.txt).*)',
+ ],
+}
diff --git a/tests/fixtures/middleware-i18n-excluded-paths/next-env.d.ts b/tests/fixtures/middleware-i18n-excluded-paths/next-env.d.ts
new file mode 100644
index 000000000..52e831b43
--- /dev/null
+++ b/tests/fixtures/middleware-i18n-excluded-paths/next-env.d.ts
@@ -0,0 +1,5 @@
+///
+///
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/pages/api-reference/config/typescript for more information.
diff --git a/tests/fixtures/middleware-i18n-excluded-paths/next.config.js b/tests/fixtures/middleware-i18n-excluded-paths/next.config.js
new file mode 100644
index 000000000..a96ce45ff
--- /dev/null
+++ b/tests/fixtures/middleware-i18n-excluded-paths/next.config.js
@@ -0,0 +1,10 @@
+module.exports = {
+ output: 'standalone',
+ eslint: {
+ ignoreDuringBuilds: true,
+ },
+ i18n: {
+ locales: ['en', 'fr'],
+ defaultLocale: 'en',
+ },
+}
diff --git a/tests/fixtures/middleware-i18n-excluded-paths/package.json b/tests/fixtures/middleware-i18n-excluded-paths/package.json
new file mode 100644
index 000000000..3246e924f
--- /dev/null
+++ b/tests/fixtures/middleware-i18n-excluded-paths/package.json
@@ -0,0 +1,20 @@
+{
+ "name": "middleware-i18n-excluded-paths",
+ "version": "0.1.0",
+ "private": true,
+ "scripts": {
+ "postinstall": "next build",
+ "dev": "next dev",
+ "build": "next build"
+ },
+ "dependencies": {
+ "next": "latest",
+ "react": "18.2.0",
+ "react-dom": "18.2.0"
+ },
+ "devDependencies": {
+ "@types/node": "^17.0.12",
+ "@types/react": "18.2.47",
+ "typescript": "^5.2.2"
+ }
+}
diff --git a/tests/fixtures/middleware-i18n-excluded-paths/pages/[[...catchall]].tsx b/tests/fixtures/middleware-i18n-excluded-paths/pages/[[...catchall]].tsx
new file mode 100644
index 000000000..811d8a6f2
--- /dev/null
+++ b/tests/fixtures/middleware-i18n-excluded-paths/pages/[[...catchall]].tsx
@@ -0,0 +1,21 @@
+import type { GetStaticPaths, GetStaticProps } from 'next'
+
+export default function CatchAll({ params, locale }) {
+ return {JSON.stringify({ params, locale }, null, 2)}
+}
+
+export const getStaticPaths: GetStaticPaths = () => {
+ return {
+ paths: [],
+ fallback: 'blocking',
+ }
+}
+
+export const getStaticProps: GetStaticProps = ({ params, locale }) => {
+ return {
+ props: {
+ params,
+ locale,
+ },
+ }
+}
diff --git a/tests/fixtures/middleware-i18n-excluded-paths/pages/api/[[...catchall]].ts b/tests/fixtures/middleware-i18n-excluded-paths/pages/api/[[...catchall]].ts
new file mode 100644
index 000000000..415f631cf
--- /dev/null
+++ b/tests/fixtures/middleware-i18n-excluded-paths/pages/api/[[...catchall]].ts
@@ -0,0 +1,11 @@
+import type { NextApiRequest, NextApiResponse } from 'next'
+
+type ResponseData = {
+ params: {
+ catchall?: string[]
+ }
+}
+
+export default function handler(req: NextApiRequest, res: NextApiResponse) {
+ res.status(200).json({ params: req.query })
+}
diff --git a/tests/fixtures/middleware-i18n-excluded-paths/tsconfig.json b/tests/fixtures/middleware-i18n-excluded-paths/tsconfig.json
new file mode 100644
index 000000000..1499fe59f
--- /dev/null
+++ b/tests/fixtures/middleware-i18n-excluded-paths/tsconfig.json
@@ -0,0 +1,19 @@
+{
+ "compilerOptions": {
+ "target": "ES2017",
+ "lib": ["dom", "dom.iterable", "esnext"],
+ "allowJs": true,
+ "skipLibCheck": true,
+ "strict": false,
+ "noEmit": true,
+ "incremental": true,
+ "module": "esnext",
+ "esModuleInterop": true,
+ "moduleResolution": "node",
+ "resolveJsonModule": true,
+ "isolatedModules": true,
+ "jsx": "preserve"
+ },
+ "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
+ "exclude": ["node_modules"]
+}
diff --git a/tests/prepare.mjs b/tests/prepare.mjs
index 3316fd238..072d08e6b 100644
--- a/tests/prepare.mjs
+++ b/tests/prepare.mjs
@@ -23,6 +23,7 @@ const e2eOnlyFixtures = new Set([
'after',
'cli-before-regional-blobs-support',
'dist-dir',
+ 'middleware-i18n-excluded-paths',
// There is also a bug on Windows on Node.js 18.20.6, that cause build failures on this fixture
// see https://github.com/opennextjs/opennextjs-netlify/actions/runs/13268839161/job/37043172448?pr=2749#step:12:78
'middleware-og',
diff --git a/tests/utils/create-e2e-fixture.ts b/tests/utils/create-e2e-fixture.ts
index cc9c58849..6da96f044 100644
--- a/tests/utils/create-e2e-fixture.ts
+++ b/tests/utils/create-e2e-fixture.ts
@@ -333,6 +333,7 @@ export const fixtureFactories = {
pnpm: () => createE2EFixture('pnpm', { packageManger: 'pnpm' }),
bun: () => createE2EFixture('simple', { packageManger: 'bun' }),
middleware: () => createE2EFixture('middleware'),
+ middlewareI18nExcludedPaths: () => createE2EFixture('middleware-i18n-excluded-paths'),
middlewareOg: () => createE2EFixture('middleware-og'),
middlewarePages: () => createE2EFixture('middleware-pages'),
pageRouter: () => createE2EFixture('page-router'),