{
	admin off

	log {
		output stderr
		format filter {
			# Preserves first 8 bits from IPv4 and 32 bits from IPv6
			request>remote_ip ip_mask 8 32
			request>client_ip ip_mask 8 32

			# Remove identificable information
			request>remote_port delete
			request>headers delete
			request>uri query {
				delete url
				delete h
				delete q
			}
		}
	}

	servers {
		client_ip_headers X-Forwarded-For X-Real-IP

		# Allow the following IP to passthrough the "X-Forwarded-*" headers to SearXNG
		# https://caddyserver.com/docs/caddyfile/options#trusted-proxies
		trusted_proxies static private_ranges
		trusted_proxies_strict
	}
}

{$SEARXNG_HOSTNAME}

tls {$SEARXNG_TLS}

encode zstd gzip

@api {
	path /config
	path /healthz
	path /stats/errors
	path /stats/checker
}

@search {
	path /search
}

@imageproxy {
	path /image_proxy
}

@static {
	path /static/*
}

header {
	# CSP (https://content-security-policy.com)
	Content-Security-Policy "upgrade-insecure-requests; default-src 'none'; script-src 'self'; style-src 'self' 'unsafe-inline'; form-action 'self' https:; font-src 'self'; frame-ancestors 'self'; base-uri 'self'; connect-src 'self'; img-src * data:; frame-src https:;"

	# Disable some browser features
	Permissions-Policy "accelerometer=(),camera=(),geolocation=(),gyroscope=(),magnetometer=(),microphone=(),payment=(),usb=()"

	# Set referrer policy
	Referrer-Policy "no-referrer"

	# Force clients to use HTTPS
	Strict-Transport-Security "max-age=31536000"

	# Prevent MIME type sniffing from the declared Content-Type
	X-Content-Type-Options "nosniff"

	# X-Robots-Tag (comment to allow site indexing)
	X-Robots-Tag "noindex, noarchive, nofollow"

	# Remove "Server" header
	-Server
}

header @api {
	Access-Control-Allow-Methods "GET, OPTIONS"
	Access-Control-Allow-Origin "*"
}

route {
	# Cache policy
	header Cache-Control "max-age=0, no-store"
	header @search Cache-Control "max-age=5, private"
	header @imageproxy Cache-Control "max-age=604800, public"
	header @static Cache-Control "max-age=31536000, public, immutable"
}

# SearXNG
reverse_proxy localhost:8080 {
	# https://github.com/searx/searx-docker/issues/24
	header_up Connection "close"
}