From 980c3bafa2ea01b8e2da9a283953ead08b6a682d Mon Sep 17 00:00:00 2001
From: Nadia Santalla <nadia@santalla.io>
Date: Wed, 15 Jan 2025 13:32:14 +0100
Subject: [PATCH] create `http_version` metric

---
 output.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/output.go b/output.go
index 4ec57d1..173b40f 100644
--- a/output.go
+++ b/output.go
@@ -231,6 +231,18 @@ func (ms *metricStore) DeriveMetrics() {
 				log.Debugf("Created %q from %q", statusCodeTS.name, ts.name)
 			}()
 
+			func() {
+				strCode, _ := ts.tags.Get("proto")
+				newValue, _ := strconv.ParseFloat(strings.TrimPrefix(strCode, "HTTP/"), 32)
+				httpVersionTS := timeseries{
+					name:       "http_version",
+					metricType: metrics.Gauge,
+					tags:       ts.tags,
+				}
+				ms.store[httpVersionTS] = value{newValue, 1}
+				log.Debugf("Created %q from %q", httpVersionTS.name, ts.name)
+			}()
+
 		// Rename to http_requests_failed_total
 		case "http_req_failed":
 			newTS := ts