File size: 3,666 Bytes
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package common
import (
"fmt"
"github.com/google/uuid"
"html/template"
"log"
"math/rand"
"net"
"os"
"os/exec"
"runtime"
"strconv"
"strings"
"time"
)
func OpenBrowser(url string) {
var err error
switch runtime.GOOS {
case "linux":
err = exec.Command("xdg-open", url).Start()
case "windows":
err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
case "darwin":
err = exec.Command("open", url).Start()
}
if err != nil {
log.Println(err)
}
}
func GetIp() (ip string) {
ips, err := net.InterfaceAddrs()
if err != nil {
log.Println(err)
return ip
}
for _, a := range ips {
if ipNet, ok := a.(*net.IPNet); ok && !ipNet.IP.IsLoopback() {
if ipNet.IP.To4() != nil {
ip = ipNet.IP.String()
if strings.HasPrefix(ip, "10") {
return
}
if strings.HasPrefix(ip, "172") {
return
}
if strings.HasPrefix(ip, "192.168") {
return
}
ip = ""
}
}
}
return
}
var sizeKB = 1024
var sizeMB = sizeKB * 1024
var sizeGB = sizeMB * 1024
func Bytes2Size(num int64) string {
numStr := ""
unit := "B"
if num/int64(sizeGB) > 1 {
numStr = fmt.Sprintf("%.2f", float64(num)/float64(sizeGB))
unit = "GB"
} else if num/int64(sizeMB) > 1 {
numStr = fmt.Sprintf("%d", int(float64(num)/float64(sizeMB)))
unit = "MB"
} else if num/int64(sizeKB) > 1 {
numStr = fmt.Sprintf("%d", int(float64(num)/float64(sizeKB)))
unit = "KB"
} else {
numStr = fmt.Sprintf("%d", num)
}
return numStr + " " + unit
}
func Seconds2Time(num int) (time string) {
if num/31104000 > 0 {
time += strconv.Itoa(num/31104000) + " 年 "
num %= 31104000
}
if num/2592000 > 0 {
time += strconv.Itoa(num/2592000) + " 个月 "
num %= 2592000
}
if num/86400 > 0 {
time += strconv.Itoa(num/86400) + " 天 "
num %= 86400
}
if num/3600 > 0 {
time += strconv.Itoa(num/3600) + " 小时 "
num %= 3600
}
if num/60 > 0 {
time += strconv.Itoa(num/60) + " 分钟 "
num %= 60
}
time += strconv.Itoa(num) + " 秒"
return
}
func Interface2String(inter interface{}) string {
switch inter.(type) {
case string:
return inter.(string)
case int:
return fmt.Sprintf("%d", inter.(int))
case float64:
return fmt.Sprintf("%f", inter.(float64))
}
return "Not Implemented"
}
func UnescapeHTML(x string) interface{} {
return template.HTML(x)
}
func IntMax(a int, b int) int {
if a >= b {
return a
} else {
return b
}
}
func GetUUID() string {
code := uuid.New().String()
code = strings.Replace(code, "-", "", -1)
return code
}
const keyChars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
func init() {
rand.Seed(time.Now().UnixNano())
}
func GenerateKey() string {
rand.Seed(time.Now().UnixNano())
key := make([]byte, 48)
for i := 0; i < 16; i++ {
key[i] = keyChars[rand.Intn(len(keyChars))]
}
uuid_ := GetUUID()
for i := 0; i < 32; i++ {
c := uuid_[i]
if i%2 == 0 && c >= 'a' && c <= 'z' {
c = c - 'a' + 'A'
}
key[i+16] = c
}
return string(key)
}
func GetRandomString(length int) string {
rand.Seed(time.Now().UnixNano())
key := make([]byte, length)
for i := 0; i < length; i++ {
key[i] = keyChars[rand.Intn(len(keyChars))]
}
return string(key)
}
func GetTimestamp() int64 {
return time.Now().Unix()
}
func Max(a int, b int) int {
if a >= b {
return a
} else {
return b
}
}
func GetOrDefault(env string, defaultValue int) int {
if env == "" || os.Getenv(env) == "" {
return defaultValue
}
num, err := strconv.Atoi(os.Getenv(env))
if err != nil {
SysError(fmt.Sprintf("failed to parse %s: %s, using default value: %d", env, err.Error(), defaultValue))
return defaultValue
}
return num
}
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