From 68eff1dc4b20cace0bc0dcc43b10a21e5edac682 Mon Sep 17 00:00:00 2001
From: Alejandro Revilla <apr@jpos.org>
Date: Thu, 9 Jan 2025 20:29:19 -0300
Subject: [PATCH] Prometheus now requires Content-Type

---
 jpos/src/main/java/org/jpos/metrics/PrometheusService.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/jpos/src/main/java/org/jpos/metrics/PrometheusService.java b/jpos/src/main/java/org/jpos/metrics/PrometheusService.java
index 1c678a4f33..9770fead2a 100644
--- a/jpos/src/main/java/org/jpos/metrics/PrometheusService.java
+++ b/jpos/src/main/java/org/jpos/metrics/PrometheusService.java
@@ -42,6 +42,7 @@ protected void startService() throws ConfigurationException {
             server = HttpServer.create(new InetSocketAddress(port), 0);
             server.createContext(path, httpExchange -> {
                 String response = registry.scrape();
+                httpExchange.getResponseHeaders().add("Content-Type", "text/plain; version=0.0.4");
                 httpExchange.sendResponseHeaders(200, response.getBytes().length);
                 try (OutputStream os = httpExchange.getResponseBody()) {
                     os.write(response.getBytes());