invidious/etc/varnish/default.vcl

vcl 4.1;

backend invidious_service {
    .host = invidious;
    .port = "3000";
    .connect_timeout = 5s;
    .first_byte_timeout = 5s;
    .between_bytes_timeout = 2s;
}

sub vcl_recv {
    set req.backend_hint = invidious_service;

    if (req.url ~ "(?i)\.(css|js|png|gif|jpg|jpeg|svg|woff|woff2)$") {
        unset req.http.Cookie;
    }

    return (hash);
}

sub vcl_hash {
    hash_data(req.url);
    if (req.http.Host) {
        hash_data(req.http.Host);
    } else {
        hash_data(server.ip);
    }
    return (lookup);
}

sub vcl_backend_response {
    set beresp.storage = storage.default;
    if (bereq.url ~ "(?i)\.(png|gif|jpg|jpeg|svg)$") {
        unset beresp.http.Set-Cookie;
        set beresp.ttl = 3d;
    }
    if (bereq.url ~ "(?i)\.(css|js|woff|woff2)$") {
        set beresp.do_gzip = true;
        unset beresp.http.Set-Cookie;
        set beresp.ttl = 7d;
    }

    return (deliver);
}

sub vcl_deliver {
    if (obj.hits > 0) {
        set resp.http.X-Cache = "HIT";
    } else {
        set resp.http.X-Cache = "MISS";
    }
    return (deliver);
}