vcl 4.1;
import std;

backend default {
	.host                   = "127.0.0.1";
	.port                   = "7500";
	.max_connections        = 300;
	.first_byte_timeout     = 240s;
	.connect_timeout        = 10s;
	.between_bytes_timeout  = 2s;
}
sub vcl_recv {
	unset req.http.user-agent;
	if (	req.method != "GET" &&
		req.method != "HEAD" &&
		req.method != "PUT" &&
		req.method != "POST" &&
		req.method != "TRACE" &&
		req.method != "OPTIONS" &&
		req.method != "PATCH" &&
		req.method != "DELETE") {
			return (pipe);
	}
	if (req.method == "GET" || req.method == "HEAD") {
		return (hash);
	}
	return (pass);
}
sub vcl_hash {
	hash_data(req.url);
	hash_data(req.http.host);
	if (req.http.cookie ~ "pleroma_key|gitea_incredible|grafana_session") {
		hash_data(req.http.cookie);
	}
	if (req.http.authorization) {
		hash_data(req.http.authorization);
	}
	return (lookup);
}
sub vcl_backend_response {
	set beresp.do_stream = false;
	set beresp.do_gzip = true;
	if (beresp.status == 500 || beresp.status == 502 || beresp.status == 503 || beresp.status == 504) {
		if (bereq.is_bgfetch){
			return (abandon);
		}
		set beresp.uncacheable = true;
		return (deliver);
	}
	if (beresp.http.Set-Cookie || beresp.http.Cache-Control ~ "no-cache|no-store|private") {
		set beresp.uncacheable = true;
		return (deliver);
	}
	if (beresp.http.ETag || beresp.http.Last-Modified || bereq.http.If-Modified-Since) {
		set beresp.grace = 1h;
		set beresp.keep = 12h;
	}
	if (beresp.status == 301) {
		set beresp.ttl = 24h;
	}
	return (deliver);
}
sub vcl_deliver {
	if (req.proto ~ "HTTP/2.0" && resp.http.keep-alive) {
		unset resp.http.keep-alive;
	}
	if (obj.hits > 0) {
		set resp.http.X-Cache = "HIT";
	} else {
		set resp.http.X-Cache = "MISS";
	}
	return (deliver);
}