ixfrdist: correct content type for metrics

diff --git a/pdns/ixfrdist-web.cc b/pdns/ixfrdist-web.cc
index 506d8c4646274e040182e4fdaa4b48bed1a1c51a..334306efe3508ac1ca87da29282c2f015f36bbc5 100644 (file)
--- a/pdns/ixfrdist-web.cc
+++ b/pdns/ixfrdist-web.cc
@@ -50,5 +50,6 @@ void IXFRDistWebServer::getMetrics(HttpRequest* req, HttpResponse* resp) {
     throw HttpMethodNotAllowedException();
 
   resp->body = doGetStats();
+  resp->headers["Content-Type"] = "text/plain; version=0.0.4"; // https://prometheus.io/docs/instrumenting/exposition_formats/#text-based-format
   resp->status = 200;
 }