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May be a little convoluted but I was just trying to do something like this. This is what I came up with as a workaround for local dev and it seems to work. Basically, I just treated the root domain as a subdomain when developing locally.
I have some variables define that determine the domain I am targeting and will later use this in my middleware to filter where I want things to be routed.
export const ROOT_DOMAIN = `${ROOT}.com`;
export const ROOT_HOSTNAMES = new Set<string>([
ROOT_DOMAIN,
"root.localhost:3000",
]);
export const APP_DOMAIN =
process.env.NEXT_PUBLIC_VERCEL_ENV === "production"
? `https://app.${ROOT_DOMAIN}`
: "http://localhost:3000";
export const APP_HOSTNAMES = new Set<string>([
`app.${ROOT_DOMAIN}`,
"localhost:3000",
]);The key here is making sure the root domain is treated as a subdomain root.localhost:3000 and the subdomain we are targeting is treated as the root localhost:3000.
Next, my middleware function uses the previously defined variables to determine our routes. I have the folders setup as the actual domain names for clarity here
export function middleware(req: NextRequest) {
const { domain, path, key } = parse(req);
// rewrite app to `/app.domain.com` folder
if (APP_HOSTNAMES.has(domain)) {
return NextResponse.rewrite(
new URL(`/app.domain.com${path === "/" ? "" : path}`, req.url),
);
}
// rewrite admin to `/admin.domain.com` folder
if (ADMIN_HOSTNAMES.has(domain)) {
return NextResponse.rewrite(
new URL(`/admin.domain.com${path === "/" ? "" : path}`, req.url),
);
}
// rewrite root to `/domain.com` folder
if (ROOT_HOSTNAMES.has(domain)) {
return NextResponse.rewrite(
new URL(`/domain.com${path === "/" ? "" : path}`, req.url),
);
}
// rewrite everything else to `/[domain]/[slug] dynamic route
return NextResponse.rewrite(new URL(`/${domain}${path}`, req.url));
}Lastly, we can now go target the standard localhost:3000 and http://localhost:3000/api/auth/callback/google for our Google auth!
Originally posted by @CrutchTheClutch in #329 (comment)
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