From 12e8bc7b09e465eb61f34af62b2888378a46a1df Mon Sep 17 00:00:00 2001
From: juanvallejo <jvallejo@redhat.com>
Date: Mon, 6 Aug 2018 11:51:13 -0400
Subject: [PATCH] add CancelRequest to discovery round-tripper

Kubernetes-commit: 07eae3a1725c65860d85956f4fda20293a8d0a9e
---
 discovery/round_tripper.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/discovery/round_tripper.go b/discovery/round_tripper.go
index a195d2a2..75b7f520 100644
--- a/discovery/round_tripper.go
+++ b/discovery/round_tripper.go
@@ -20,6 +20,7 @@ import (
 	"net/http"
 	"path/filepath"
 
+	"github.com/golang/glog"
 	"github.com/gregjones/httpcache"
 	"github.com/gregjones/httpcache/diskcache"
 	"github.com/peterbourgon/diskv"
@@ -47,4 +48,15 @@ func (rt *cacheRoundTripper) RoundTrip(req *http.Request) (*http.Response, error
 	return rt.rt.RoundTrip(req)
 }
 
+func (rt *cacheRoundTripper) CancelRequest(req *http.Request) {
+	type canceler interface {
+		CancelRequest(*http.Request)
+	}
+	if cr, ok := rt.rt.Transport.(canceler); ok {
+		cr.CancelRequest(req)
+	} else {
+		glog.Errorf("CancelRequest not implemented by %T", rt.rt.Transport)
+	}
+}
+
 func (rt *cacheRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt.Transport }