Custom error page in Symfony app

[kjchmielewski]

I try to set custom error page in a way similar to what i do in apache:

vhost.conf:

<VirtualHost *:8000>

    # site root, rewrite rules etc. like in Symfony apache bundle
    # example alias
    Alias /files /var/www/portal/public/sites/default/files/files
    Alias /en/files /var/www/portal/public/sites/default/files/files

    # Custom error documents
    ErrorDocument 404 /index.php?error_code=404
    ErrorDocument 403 /index.php?error_code=403
</VirtualHost>

which works fine, apache passes request to index.php with query string set in case of 403 and 404 error occurrs.

Now I want to use:

https://github.com/dunglas/symfony-docker

as apache + php_fpm replacement, and tried to set this in frankenphp:

./frankenphp/Caddyfile:/etc/caddy/Caddyfile:ro (bind mounted in docker compose)

{
	{$CADDY_GLOBAL_OPTIONS}

	frankenphp {
		{$FRANKENPHP_CONFIG}
	}
}

{$CADDY_EXTRA_CONFIG}

{$SERVER_NAME:localhost} {
	log {
		# Redact the authorization query parameter that can be set by Mercure
		format filter {
			request>uri query {
				replace authorization REDACTED
			}
		}
	}

	root * /app/public
	encode zstd br gzip

	# Aliases
        # alias example
	handle_path /files/* {
		root * /app/public/sites/default/files/files
		file_server
	}

	mercure {
		# Transport to use (default to Bolt)
		transport_url {$MERCURE_TRANSPORT_URL:bolt:///data/mercure.db}
		# Publisher JWT key
		publisher_jwt {env.MERCURE_PUBLISHER_JWT_KEY} {env.MERCURE_PUBLISHER_JWT_ALG}
		# Subscriber JWT key
		subscriber_jwt {env.MERCURE_SUBSCRIBER_JWT_KEY} {env.MERCURE_SUBSCRIBER_JWT_ALG}
		# Allow anonymous subscribers (double-check that it's what you want)
		anonymous
		# Enable the subscription API (double-check that it's what you want)
		subscriptions
		# Extra directives
		{$MERCURE_EXTRA_DIRECTIVES}
	}

	vulcain

	{$CADDY_SERVER_EXTRA_DIRECTIVES}

	# Disable Topics tracking if not enabled explicitly: https://github.com/jkarlin/topics
	header ?Permissions-Policy "browsing-topics=()"

	# Simplified error handling
	handle_errors 403 404 {
		rewrite * /index.php?error_code={http.error.status_code}
		file_server
	}

	php_server

}

But, when I refer nonexistent file, it doesn't work in a way it would expect.
Instead of Symfony error page i get empty response with 404 status

 $ curl -v http://localhost:8000/files/test.pdf
* Host localhost:8000 was resolved.
* IPv6: ::1
* IPv4: 127.0.0.1
*   Trying [::1]:8000...
* Connected to localhost (::1) port 8000
> GET /files/test.pdf HTTP/1.1
> Host: localhost:8000
> User-Agent: curl/8.6.0
> Accept: */*
> 
< HTTP/1.1 404 Not Found
< Server: Caddy
< Date: Mon, 23 Sep 2024 08:48:54 GMT
< Content-Length: 0
< 
* Connection #0 to host localhost left intact

Any suggestions, how to make it work, am I missing something ?

[kjchmielewski]

I figured it out myself, works like that:

	# Set error handling to index.php
	handle_errors {
		rewrite * /index.php?error_code={http.error.status_code}
		php_server {
			root /app/public
			index index.php
		}
	}