diff --git a/vendor/go.etcd.io/etcd/pkg/httputil/httputil.go b/vendor/go.etcd.io/etcd/pkg/httputil/httputil.go
new file mode 100644
index 0000000..3bf58a3
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/pkg/httputil/httputil.go
@@ -0,0 +1,50 @@
+// Copyright 2018 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package httputil provides HTTP utility functions.
+package httputil
+
+import (
+	"io"
+	"io/ioutil"
+	"net"
+	"net/http"
+)
+
+// GracefulClose drains http.Response.Body until it hits EOF
+// and closes it. This prevents TCP/TLS connections from closing,
+// therefore available for reuse.
+// Borrowed from golang/net/context/ctxhttp/cancelreq.go.
+func GracefulClose(resp *http.Response) {
+	io.Copy(ioutil.Discard, resp.Body)
+	resp.Body.Close()
+}
+
+// GetHostname returns the hostname from request Host field.
+// It returns empty string, if Host field contains invalid
+// value (e.g. "localhost:::" with too many colons).
+func GetHostname(req *http.Request) string {
+	if req == nil {
+		return ""
+	}
+	h, _, err := net.SplitHostPort(req.Host)
+	if err != nil {
+		return req.Host
+	}
+	return h
+}