             }
             let headers: [String: [String]] = [
                 "ETag": ["\(ver)"],
+                "Cache-Control": ["max-age=0, must-revalidate"],
                 "Last-Modified": [date.RFC1123String() ?? ""]
             ]
             return BRHTTPResponse(

            if del {
                let headers: [String: [String]] = [
                    "ETag": ["\(ver)"],
                    "Last-Modified": [date.RFC1123String() ?? ""]
                ]
                return BRHTTPResponse(

            }
            let headers: [String: [String]] = [
                "ETag": ["\(ver)"],
                "Cache-Control": ["max-age=0, must-revalidate"],
                "Last-Modified": [date.RFC1123String() ?? ""]
            ]
            return BRHTTPResponse(
