forked from cockroachdb/cockroach
/
host.go
39 lines (36 loc) · 1.2 KB
/
host.go
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// Copyright 2015 The Cockroach 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. See the AUTHORS file
// for names of contributors.
//
// Author: Tobias Schottdorf (tobias.schottdorf@gmail.com)
package util
import (
"net"
"os"
)
// EnsureHost takes a host:port pair, where the host portion is optional.
// If a host is present, the output is equal to the input. Otherwise,
// the output will contain a host portion equal to the hostname (or
// "127.0.0.1" as a fallback).
func EnsureHost(addr string) string {
host, port, err := net.SplitHostPort(addr)
if host != "" || err != nil {
return addr
}
host, err = os.Hostname()
if err != nil {
host = "127.0.0.1"
}
return net.JoinHostPort(host, port)
}