Supporting glob pattern exclusion in route rules

[trc-mathieu]

Hi, I have a use case where an api exists at /api/auth/ and some other endpoints starting with exactly /api/....

I would like to define an exclusion pattern to be able to proxy requests that are not /api/auth to somewhere else. I haven't found a way and maybe it's not even possible. I was wondering if you had any suggestions or thoughts on this.
Here's the part where you deal with routeRules:

nitro/src/runtime/route-rules.ts

Lines 46 to 62 in aabdc9c

	if (routeRules.proxy) {
	let target = routeRules.proxy.to;
	if (target.endsWith("/**")) {
	let targetPath = event.path;
	const strpBase = (routeRules.proxy as any)._proxyStripBase;
	if (strpBase) {
	targetPath = withoutBase(targetPath, strpBase);
	}
	target = joinURL(target.slice(0, -3), targetPath);
	} else if (event.path.includes("?")) {
	const query = getQuery(event.path);
	target = withQuery(target, query);
	}
	return proxyRequest(event, target, {
	fetch: ctx.localFetch,
	...routeRules.proxy,
	});

Without exclusion support, I need to explicitly set all the routes as proxy.

Ideally, I would like something like this to be supported:

routeRules:{
 'api/(!auth)**': {proxy: 'https://some-proxied-url/**}
}

Right now, I need to do specify every route, which is really cumbersome

routeRules:{
 'api/abc/': {proxy: 'https://some-proxied-url/abc/},
 'api/abc/**': {proxy: 'https://some-proxied-url/abc/**},
 'api/bhi/**': {proxy: 'https://some-proxied-url/bhi/**}
[...]
}

Thank you for any help on this!

[pi0]

Hi. Instead of single api/(!auth)**, you should be able to simply use something like this to exclude api/auth/** pattern.

routeRules:{
 'api/auth/**': { proxy: false },
 'api/**': { proxy: 'https://some-proxied-url/**' }
}

Supporting regex and exclude patterns, while possible and a nice idea for this usecase, will add to generic compatibility and complexity of route rules (that needs to be integratable with cross deployment compatibility) so it is unlikely we add this syntax support.

[pi0]

It might be a bug then. Do you mind to open an issue with minimal reproduction? 🙏🏼 (above example)

[trc-mathieu]

will do, thank you!

[guibulator]

@pi0 Here's a reproduction of the issue
https://github.com/guibulator/nitro-route-rules-repro

[manniL]

@guibulator best to open an issue with that repro + a good description :)

[guibulator]

Hum, so it seems to be working with nitro only as you described. Do you know if Nuxt is doing anything special with the routeRules before passing them over to Nitro?
So in this attempt to reproduce the issue with the nitro code sandbox, it's working
https://codesandbox.io/p/github/unjs/nitro/csb-s5h2y3/draft/trusting-blackwell?file=%2Fnitro.config.ts%3A9%2C4

Navigating to https://s5h2y3-3000.csb.app/api/objects does proxy the request and navigating to https://s5h2y3-3000.csb.app/api/auth/info/ doesn't.