URL proxy rewrites for multi-tenancy

[dotnize]

It would be nice to have a feature similar to NextResponse.rewrite() in Next.js, allowing domain-based routing and proxying. This would enable different route structures for specific domains/tenants without the need for multiple apps or deployments.

An example of this is the Vercel Platforms Starter Kit (middleware.ts) which has 2 sets of routes:

1. app/app for the root domain (app.vercel.pub)
2. app/[domain] for all other tenants (subdomains and custom domains)

SvelteKit also has a reroute (sveltejs/kit#11537) hook that probably makes this possible, but I couldn't find an example since it was just recently released in January.

Here are other proposals/RFCs from other frameworks that I've found:

Astro: withastro/roadmap#665, withastro/roadmap#681
Remix: remix-run/remix#2857, remix-run/remix#2886

Would the team be interested in exploring this feature?
Are there potential approaches or existing patterns that can be used as a workaround? (besides using an external/third-party proxy or multiple deployments)

Update: already possible - see https://egoist.dev/multi-tenant-web-app-2024#solid-start

[FlatMapIO]

I have the same requirement, currently using a CF worker proxy to rewrite URLs is very uncomfortable, and I will encounter some stream interruption related issues

[ryansolid]

I imagine we can already rewrite from middleware on server requests.. But if I understand this correctly we need to do so on client routing as well. So this is a router feature isn't it? Like a way of intercepting the path before sending it to matching?

[dotnize]

Yes, but it seems like this is already possible with a few modifications!
https://egoist.dev/multi-tenant-web-app-2024#solid-start

[Sleepful]

https://archive.md/FYnXW

[Sleepful]

Ryan explains how the FileRouter works here, 35:41:

https://www.youtube.com/live/r147AHzbys0&t=2141

Which is relevant to the blog article about multi-tenant fileRouter