Caddyfile

{
	admin off
	persist_config off
	auto_https off
}

# Mirrors the language negotiation of the former SvelteKit server.
# A saved choice wins: deploio_language, or a legacy non-German paraglide_lang.
(language_redirect) {
	@saved_{args[0]} {
		method GET HEAD
		header Accept text/html*
		not path /en /en/* /fr /fr/* /it /it/*
		expression `{http.request.cookie.deploio_language} == "{args[0]}" || (!({http.request.cookie.deploio_language} in ["de", "en", "fr", "it"]) && {http.request.cookie.paraglide_lang} == "{args[0]}")`
	}
	redir @saved_{args[0]} /{args[0]}{uri} 302

	# Skip unsupported languages, then match when this is the first supported one.
	@browser_{args[0]} {
		method GET HEAD
		header Accept text/html*
		not path /en /en/* /fr /fr/* /it /it/*
		header_regexp Accept-Language `(?i)^(?:\s*(?:\*|[a-z]{3,8}|[abcghj-z][a-z]|d[a-df-z]|e[a-mo-z]|f[a-qs-z]|i[a-su-z])(?:-[a-z0-9]{1,8})*(?:\s*;\s*q=[0-9.]+)?\s*,)*\s*{args[0]}(?:-[a-z0-9]{1,8})*\s*(?:[;,]|$)`
		expression `!({http.request.cookie.deploio_language} in ["de", "en", "fr", "it"]) && !({http.request.cookie.paraglide_lang} in ["en", "fr", "it"])`
	}
	redir @browser_{args[0]} /{args[0]}{uri} 302
}

:{$PORT:8080} {
	root * /srv

	redir /claude_skill https://github.com/ninech/deploio-skills 301
	redir /claude_skill/ https://github.com/ninech/deploio-skills 301
	redir /slack https://join.slack.com/t/deploiocommunity/shared_invite/zt-20tb3k93m-O4NEUs0RjZYGQNQoih8zkA 302
	redir /slack/ https://join.slack.com/t/deploiocommunity/shared_invite/zt-20tb3k93m-O4NEUs0RjZYGQNQoih8zkA 302
	redir /terms https://docs.nine.ch/docs/legal-documents/general-terms-and-conditions/ 301
	redir /terms/ https://docs.nine.ch/docs/legal-documents/general-terms-and-conditions/ 301

	# German lives at the root. Unprefixed pages redirect to /en, /fr or /it
	# when the visitor picked that language (cookie set by the language switcher)
	# or, without a saved choice, when it is their first supported browser language.
	@unprefixed_page {
		method GET HEAD
		header Accept text/html*
		not path /en /en/* /fr /fr/* /it /it/*
	}
	header @unprefixed_page Vary "Accept-Language, Cookie"

	import language_redirect en
	import language_redirect fr
	import language_redirect it

	encode gzip zstd

	try_files {path} {path}/index.html {path}.html

	handle_errors {
		@404 expression {err.status_code} == 404
		handle @404 {
			# Serve the not-found page in the language of the requested path.
			@localized path_regexp lang ^/(en|fr|it)(?:/|$)
			@german not path_regexp ^/(en|fr|it)(?:/|$)
			rewrite @localized /{re.lang.1}/404/index.html
			rewrite @german /404/index.html
			file_server
		}
	}

	file_server
}