FRONTEND_PATH is not applied for assets URLs

[juangon]

Describe the bug
When using frontend_path parameter (in my case used as env variable), when referencing assets in /assets folder, frontend_path is not added, throwing 404 errors for those resources

To Reproduce
Execute reflex populating FRONTEND_PATH env variable. Add some assets in /assets folder and reference them as stated in documents (prefixing them with slash '/').

Expected behavior
Assets path should add FRONTEND_PATH to the referenced resources.

Screenshots

Specifics (please complete the following information):

• Python Version:3.12
• Reflex Version: 0.6.5
• OS: Linux
• Browser (Optional):

Additional context
Add any other context about the problem here.

[linear]

ENG-4161 FRONTEND_PATH is not applied for assets URLs

[juangon]

In order to give more clues, this doesn't work in two parts:

• favicon (located in /assets)
• Resources referenced from css that are located in /assets too, like:

@font-face {
    font-family: inetum;
    font-weight: bold;
    src: url("/fonts/Poppins-Bold.ttf") format("truetype");
}

In font case, unless I am prefixing the url with FRONTEND_PATH, it won't work.

[benedikt-bartscher]

@juangon can you try with rx.asset and this PR #4460 ?

[juangon]

Thanks @benedikt-bartscher , but how can I use rx.asset inside a CSS file?

[benedikt-bartscher]

Thanks @benedikt-bartscher , but how can I use rx.asset inside a CSS file?

You can't, maybe there is a way to set the frontend root in package.json and let react adjust all those paths instead?
My pr is just a draft for rx.asset support, not a full fix for this

[masenf]

We do have some path rewriting here

reflex/reflex/.templates/web/jsconfig.json

Lines 5 to 6 in a320d06

	"$/*": ["*"],
	"@/*": ["public/*"]

, but i think this applies only to js files, not to css.

[masenf]

Assets path should add FRONTEND_PATH to the referenced resources.

I don't know if this is generally achievable while still making it possible to access files from the root of the host ("above" where the reflex app is served)

[juangon]

From my point of view, as I would like to "detach" the needed configuration from testing (ie., all localhost and root path) to production (proxy and URL that uses paths to serve different services). I would like having DEPLOY_URL variable as the path that reflex adds to every relative path within the application. I think FRONTEND_PATH and DEPLOY_URL sounds a bit duplicate for the same stuff maybe.