Splits the two hostnames across one deployment. No files move: the Next app still
serves every route on both hosts, and the middleware decides per host which paths it
owns and 301s the rest. /login and /signup stay on www - all 82 marketing CTAs point
at /signup, which carries a hard canonical to www plus ad traffic.
src/lib/hosts.ts is the single source of truth for the boundary (APP_PATH_PREFIXES,
isAppPath, wwwUrl, appUrl, urlForPath). The middleware and every absolute-URL builder
read from it so they cannot drift apart.
- Split the overloaded NEXT_PUBLIC_APP_URL into a www and an app origin. It previously
fed both public URLs and in-app URLs, so any single value was wrong somewhere. Most
important: QRCodeCard encodes this origin into the QR code the user downloads and
prints, so it must stay on www.
- Route Stripe return URLs, email links and OAuth redirects per path rather than
against one origin, so /dashboard lands on app and /pricing on www.
- Cross the host boundary once, after a successful login: the router cannot push across
origins, so that jump needs a full load. The user arrives signed in because the
session cookie is scoped to COOKIE_DOMAIN.
- Keep the app host out of search indexes: X-Robots-Tag on every response plus a
Disallow-all robots.txt via rewrite, and /sitemap.xml redirects to www.
- Point the TikTok callback fallback at www explicitly. It used to read
NEXT_PUBLIC_APP_URL, whose meaning changed here, and only the apex domain is
verified with TikTok.
Host splitting is inert while both origins are equal, so development is unaffected.
Verified: tsc clean, production build succeeds including the Edge middleware bundle,
and the path-to-host mapping is unit-checked (prefix traps like /created and
/settings-guide stay on www, query strings do not break matching).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Groundwork for moving the app to app.qrmaster.net: the session has to survive the
host change from www.qrmaster.net to app.qrmaster.net.
- Add COOKIE_DOMAIN and apply it to the auth, CSRF, attribution and OAuth flow
cookies. Honoured only in production, because browsers reject dotted domains on
localhost - a prod .env copied into a dev environment would otherwise break
every login instead of just ignoring the value.
- Expire both the host-only and the domain-scoped variant on logout. Next's
ResponseCookies is keyed by cookie name and rewrites the entire set-cookie
header from its internal map on every set(), so the two variants must be
appended manually - otherwise one overwrites the other and the surviving stale
cookie keeps the user signed in.
- Pass COOKIE_DOMAIN as both build arg and runtime env: process.env is inlined
into the Edge middleware bundle, so a runtime-only value would leave the
middleware and the route handlers disagreeing about the cookie scope.
No behaviour change while COOKIE_DOMAIN is unset.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
