mirror of https://github.com/k3s-io/k3s
51 lines
1.5 KiB
Go
51 lines
1.5 KiB
Go
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// Copyright 2018 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package httputil provides HTTP utility functions.
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package httputil
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import (
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"io"
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"io/ioutil"
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"net"
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"net/http"
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)
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// GracefulClose drains http.Response.Body until it hits EOF
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// and closes it. This prevents TCP/TLS connections from closing,
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// therefore available for reuse.
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// Borrowed from golang/net/context/ctxhttp/cancelreq.go.
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func GracefulClose(resp *http.Response) {
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io.Copy(ioutil.Discard, resp.Body)
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resp.Body.Close()
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}
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// GetHostname returns the hostname from request Host field.
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// It returns empty string, if Host field contains invalid
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// value (e.g. "localhost:::" with too many colons).
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func GetHostname(req *http.Request) string {
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if req == nil {
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return ""
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}
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h, _, err := net.SplitHostPort(req.Host)
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if err != nil {
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return req.Host
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}
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return h
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}
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