fix: pass correct domain to server (#144)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: ascorbic

src/run/handlers/server.ts

@@ -23,9 +23,11 @@ export default async (request: Request) => {
     tagsManifest = await getTagsManifest()
 
     const { getMockedRequestHandlers } = await import('../next.cjs')
+    const url = new URL(request.url)
+
     ;[nextHandler] = await getMockedRequestHandlers({
-      port: 3000,
-      hostname: 'localhost',
+      port: Number(url.port) || 443,
+      hostname: url.hostname,
       dir: process.cwd(),
       isDev: false,
     })

tests/fixtures/simple-next-app/app/api/url/route.js

@@ -0,0 +1,5 @@
+import { NextResponse } from 'next/server'
+
+export async function GET(request) {
+  return NextResponse.json({ url: request.url })
+}

tests/integration/simple-app.test.ts

@@ -84,3 +84,12 @@ test<FixtureTestContext>('stale-while-revalidate headers should be normalized to
   const index = await invokeFunction(ctx, { url: '/' })
   expect(index.headers?.['netlify-cdn-cache-control']).toContain('stale-while-revalidate=31536000')
 })
+
+test<FixtureTestContext>('handlers receive correct site domain', async (ctx) => {
+  await createFixture('simple-next-app', ctx)
+  await runPlugin(ctx)
+  const index = await invokeFunction(ctx, { url: '/api/url' })
+  const data = JSON.parse(index.body)
+  const url = new URL(data.url)
+  expect(url.hostname).toBe('example.netlify')
+})