Wrong base url when running behind proxy and not in root directory

[tmakinen]

I'm trying to run PLA using distributed docker container behind proxy. Problem is that all assets are tried to load from wrong URL. After setting X-Forwarded-Proto and Host headers correctly i managed to get host part correctly from assets but they are still loaded from root directory.

Setting X-Forwarded-Prefix didn't have any effect.

I'm running nginx as proxy and have following configuration:

location /phpldapadmin/ {
  proxy_set_header Host example.com;
  proxy_set_header X-Forwarded-Prefix /phpldapadmin/;
  proxy_set_header X-Forwarded-Proto https;
  proxy_pass http://127.0.0.1:8080/;
}

Going to URL https://example.com/phpldapadmin/login shows correct page but all assets (css, images, javascript etc) are missing.

[leenooks]

Override the bootstrap/app.php using the guide from Trusted Proxies.

Let me know what works, what's needed and I'll see if I can add it as a configurable item.

[leenooks]

So Ive been having a look at this today. I actually think the issue is with caddy not laravel. I dont have an idea to address it yet though...

[williamdes]

I have no idea where X-Forwarded-Prefix comes from or if it's IA suggested. Never did see that.

You are missing file_server I am pretty sure of that. FPM can not process the assets.
see https://caddyserver.com/docs/caddyfile/directives/file_server

[tmakinen]

Not sure how caddy could affect this. It seems that redirects are also broken:

# curl -s -i https://example.com/phpldapadmin/ | grep -E '^(location:|HTTP/2)'
HTTP/2 302
location: http://example.com/login
# curl -s -i https://example.com/login/ | grep -E '^(location:|HTTP/2)'
HTTP/2 404
# curl -s -i https://example.com/phpldapadmin/login/ | grep -E '^(location:|HTTP/2)'
HTTP/2 200 

Never personally seen that X-Forwarded-Prefix header before but i was just grepping code and stumbled on it and it sounded like correct option. :)

[williamdes]

I maybe did get your example wrong 🤔
See: https://caddyserver.com/docs/caddyfile/patterns#php-fpm for a FPM caddy setup
You are proxy forwarding to what server ?

[leenooks]

That container is not using caddy + fpm, its using FrankenPHP (based on caddy). When the upstream proxy is not using a path /phpldapdamin/ in your config above, it works OK (that's running the demo site) - which also has nginx in front of it.

Its when you want the proxy to appear as a path of an upstream server is where it's failing. I cant see why frankenphp is not passing any other URI (including static assets to the file_server) to anything else other than the index.

As a workaround, you can serve the site on its own root URL (which is how the demo site is running).

If you find a solution, and or anything needs to be fixed in the container let me know.

[tmakinen]

Got it now working. Problem was with Laravel trusted proxies configuration which didn't include localhost. This was easily fixed:

47aa81841477:/app$ diff -u bootstrap/app.php.orig bootstrap/app.php
--- bootstrap/app.php.orig
+++ bootstrap/app.php
@@ -29,6 +29,7 @@
 		]);
 
 		$middleware->trustProxies(at: [
+			'127.0.0.0/8',
 			'10.0.0.0/8',
 			'172.16.0.0/12',
 			'192.168.0.0/12',

After that change X-Forwarded-Prefix works as expected.

[leenooks]

So I dont see how that should work, and in my recreation of your problem it doesnt work, so there is something about my setup that I'm missing. I was assuming that you are using my docker container that is on docker hub, with nginx infront of it, but maybe you are using a different setup?

But if its all you need the great, I'll commit this fix.