168 lines
3.6 KiB
Go
168 lines
3.6 KiB
Go
/*
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Copyright 2021 The Karmada Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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"bytes"
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"fmt"
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"io"
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"net"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"sigs.k8s.io/yaml"
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"github.com/karmada-io/karmada/pkg/util"
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)
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const (
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// Query the IP address of the current host accessing the Internet
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getInternetIPUrl = "https://myexternalip.com/raw"
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// A split symbol that receives multiple values from a command flag
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separator = ","
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labelSeparator = "="
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// MaxRespBodyLength is the max length of http response body
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MaxRespBodyLength = 1 << 20 // 1 MiB
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)
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// IsExist Determine whether the path exists
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func IsExist(path string) bool {
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_, err := os.Stat(path)
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return err == nil
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}
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// StringToNetIP String To NetIP
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func StringToNetIP(addr string) net.IP {
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if ip := net.ParseIP(addr); ip != nil {
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return ip
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}
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return net.ParseIP("127.0.0.1")
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}
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// FlagsIP Receive master external IP from command flags
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func FlagsIP(ip string) []net.IP {
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var ips []net.IP
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arr := strings.Split(ip, separator)
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for _, v := range arr {
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ips = append(ips, StringToNetIP(v))
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}
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return ips
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}
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// FlagsDNS Receive master external DNS from command flags
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func FlagsDNS(dns string) []string {
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return strings.Split(dns, separator)
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}
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// InternetIP Current host Internet IP.
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func InternetIP() (net.IP, error) {
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resp, err := http.Get(getInternetIPUrl)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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content, err := io.ReadAll(io.LimitReader(resp.Body, MaxRespBodyLength))
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if err != nil {
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return nil, err
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}
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return StringToNetIP(string(content)), nil
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}
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// FileToBytes File Conversion Bytes
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func FileToBytes(path, name string) ([]byte, error) {
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filename := filepath.Join(path, name)
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file, err := os.Open(filename)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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stats, err := file.Stat()
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if err != nil {
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return nil, err
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}
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data := make([]byte, stats.Size())
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_, err = file.Read(data)
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if err != nil {
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return nil, err
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}
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return data, nil
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}
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// BytesToFile Bytes Conversion File
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func BytesToFile(path, name string, data []byte) error {
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filename := filepath.Join(path, name)
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_, err := os.Stat(filename)
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if err == nil {
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return nil
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}
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// Create kubeconfig
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f, err := os.OpenFile(filename, os.O_CREATE|os.O_RDWR, util.DefaultFilePerm)
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if err != nil {
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return err
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}
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defer f.Close()
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_, err = f.Write(data)
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if err != nil {
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return err
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}
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return nil
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}
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// MapToString labels to string
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func MapToString(labels map[string]string) string {
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v := new(bytes.Buffer)
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for key, value := range labels {
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fmt.Fprintf(v, "%s=%s,", key, value)
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}
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return strings.TrimRight(v.String(), ",")
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}
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// StringToMap string to label
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func StringToMap(labels string) map[string]string {
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l := map[string]string{}
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slice := strings.Split(labels, labelSeparator)
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if len(slice) != 2 {
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return nil
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}
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l[slice[0]] = slice[1]
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return l
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}
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// StaticYamlToJSONByte Static yaml file conversion JSON Byte
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func StaticYamlToJSONByte(staticYaml string) []byte {
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jsonByte, err := yaml.YAMLToJSON([]byte(staticYaml))
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if err != nil {
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fmt.Println("Error convert string to json byte.")
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os.Exit(1)
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}
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return jsonByte
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}
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