From 0c5e1994691900b062a4b0498dcd7cca91fbe022 Mon Sep 17 00:00:00 2001
From: elProxy <pierre.rossi@gmail.com>
Date: Tue, 7 Jun 2022 14:06:18 +0200
Subject: [PATCH] Support legacy datadog agent (#2670)

dd-agent v5 can issue some requests with trailing slashes.
(e.g.
https://github.com/DataDog/dd-agent/blob/526559be731b6e47b12d7aa8b6d45cb8d9ac4d68/ddagent.py#L303)
Trim trailing slashes for request on /datadog/ paths to accomodate for
that.

Co-authored-by: Pierre Rossi <pierre.rossi@schibsted.com>
Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
---
 app/vminsert/main.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/vminsert/main.go b/app/vminsert/main.go
index db65643586..57e79200b1 100644
--- a/app/vminsert/main.go
+++ b/app/vminsert/main.go
@@ -189,6 +189,9 @@ func requestHandler(w http.ResponseWriter, r *http.Request) bool {
 		return true
 	}
 
+	if strings.HasPrefix(p.Suffix, "datadog/") {
+		p.Suffix = strings.TrimSuffix(p.Suffix, "/")
+	}
 	switch p.Suffix {
 	case "prometheus/", "prometheus", "prometheus/api/v1/write":
 		prometheusWriteRequests.Inc()