75 lines
1.7 KiB
Go
75 lines
1.7 KiB
Go
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. 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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*/
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package utils
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import (
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"net"
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"os"
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"reflect"
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"sync"
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)
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const (
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//Empty 空字符串
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Empty = ""
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)
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var (
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internalIPOnce sync.Once
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internalIP = ""
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)
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//GetInternal 获取内部ip
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func GetInternal() string {
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internalIPOnce.Do(func() {
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addrs, err := net.InterfaceAddrs()
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if err != nil {
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os.Stderr.WriteString("Oops:" + err.Error())
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os.Exit(1)
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}
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for _, a := range addrs {
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if ipnet, ok := a.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
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if ipnet.IP.To4() != nil {
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internalIP = ipnet.IP.To4().String()
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}
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}
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}
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})
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return internalIP
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}
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//IsNotNil 判断是否nil
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func IsNotNil(object interface{}) bool {
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return !IsNilObject(object)
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}
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//IsNilObject 判断是否空对象
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func IsNilObject(object interface{}) bool {
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if object == nil {
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return true
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}
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value := reflect.ValueOf(object)
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kind := value.Kind()
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if kind >= reflect.Chan && kind <= reflect.Slice && value.IsNil() {
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return true
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}
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return false
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}
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