如何格式化golang中的持续时间

发布时间：2020-12-16 09:25:35 所属栏目：大数据来源：网络整理

导读：我有以下代码,我无法在游戏中运行因为我使用gin框架和filewalk. package mainimport ( "fmt" "os" "path/filepath" "time" "regexp" "github.com/gin-gonic/gin" "sort" "strings" "github.com/davidscholberg/go-durationfmt")var filext = regexp.MustComp

我有以下代码,我无法在游戏中运行因为我使用gin框架和filewalk.

package main

import (
    "fmt"
    "os"
    "path/filepath"
    "time"
    "regexp"
    "github.com/gin-gonic/gin"
    "sort"
    "strings"
    "github.com/davidscholberg/go-durationfmt"
)

var filext = regexp.MustCompile(`.[mM][pP]4|.[mM]4[vV]|.jpg|.[hH]264|.go`)
var m map[int]string
var keys []int

func main() {

    if gin.IsDebugging() {
        fmt.Print("This progamm shows only the path and the age of a file in 'STARTDIR'n")
        fmt.Print("only the following files will be handled '.[mM][pP]4|.[mM]4[vV$|.[hH]264|.go'n")
        fmt.Print("The git repository: https://gitlab.com/aleks001/show-files-age n")
    }

    if len(os.Getenv("LISTEN_IP_PORT")) == 0 {
        fmt.Print("I need a ip and port on which I should listen.n")
        os.Exit(1)
    }
    router := gin.Default()

    gin.DisableConsoleColor()

    router.GET("/videoinfo",getInfo)

    router.Run(os.Getenv("LISTEN_IP_PORT"))
}

func getInfo(c *gin.Context)  {

    loc,_ := time.LoadLocation("Europe/Vienna")
    var startdir = ""

    if os.Getenv("STARTDIR") != "" {
        startdir = os.Getenv("STARTDIR")
    } else if c.GetHeader("STARTDIR") != "" {
        startdir = c.GetHeader("STARTDIR")
    } else {
        c.String(404,"Startdir not found <br>n")
        return
    }

    m = make(map[int]string)
    keys = nil

    filepath.Walk(startdir,walkpath)

    for k := range m {
        keys = append(keys,k)
    }
    sort.Ints(keys)

    for _,k := range keys {
        t := time.Date(time.Now().Year(),time.Now().Month(),time.Now().Day(),time.Now().Hour(),k,time.Now().Second(),time.Now().Nanosecond(),loc)
        durStr,err := durationfmt.Format(time.Since(t),"%h:%m")

        if err != nil {
            fmt.Println(err)
        } else {
            //fmt.Println(durStr)
            fmt.Printf("Key: %s Value: %sn",durStr,m[k])
            c.String(200,"Minutes: %s File: %sn",m[k])
        }
    }
}

func walkpath(path string,f os.FileInfo,err error) error {

  if err != nil {
        fmt.Println(err)
    } else {
        if filext.MatchString(path) {
            age := time.Now().Sub(f.ModTime())
            path_new := strings.Replace(path,"/videos/","",1)
            // path_new := strings.Replace(path,"..",1)
            /*
            fmt.Printf("Path: %s,ModTime: %s,Age: %s <br>n",walker.Path(),walker.Stat().ModTime(),age)
            c.String(200,"Path: %s,age)
            */
            fmt.Printf("Path: %s,Age: %d age minutes %0.2f  <br>n",path_new,age,age.Minutes())
            m[int(age.Minutes())]=path_new
            //c.String(200,Age: %0.2f <br>n",path,age.Minutes())
        }
    //fmt.Printf("%s with %d bytes at motime %sn",f.Size(),f.ModTime())
}
    return nil
}

我想要做的是基于filext als过滤器的文件的排序输出和作为排序标准的modtime.

我能够完成大部分请求,但输出看起来很难看,如下所示.

我用https://github.com/davidscholberg/go-durationfmt来格式化持续时间,或者我想念库.

Minutes: 0:6 File: upload/dir003/file1.m4v
Minutes: 0:5 File: transfer/dir5/file2.jpg
Minutes: -5:-48 File: transfer/dir001/file.mp4
Minutes: -6:-21 File: transfer/03.jpg
Minutes: -6:-22 File: transfer/02.mp4

因为我很新,所以我确信有更好的方法可以解决这个问题.
感谢帮助.

解决方法

例如,要提供持续时间的自定义格式,

package main

import (
    "fmt"
    "time"
)

func fmtDuration(d time.Duration) string {
    d = d.Round(time.Minute)
    h := d / time.Hour
    d -= h * time.Hour
    m := d / time.Minute
    return fmt.Sprintf("%02d:%02d",h,m)
}

func main() {
    modTime := time.Now().Round(0).Add(-(3600 + 60 + 45) * time.Second)
    since := time.Since(modTime)
    fmt.Println(since)
    durStr := fmtDuration(since)
    fmt.Println(durStr)
}

游乐场：https://play.golang.org/p/HT4bFfoA5r

输出：

1h1m45s
01:02

如果要对持续时间进行排序,请使用Go sort包.我会对ModTime进行排序,推迟计算持续时间,因为(ModTime),它在打印时是准确的.例如,

package main

import (
    "fmt"
    "os"
    "path/filepath"
    "sort"
    "strings"
    "time"
)

func isVideo(path string) bool {
    videos := []string{".mp4",".m4v",".h264"}
    ext := strings.ToLower(filepath.Ext(path))
    for _,video := range videos {
        if ext == video {
            return true
        }
    }
    return false
}

type modTimeInfo struct {
    path    string
    modTime time.Time
}

func walkModTime(root string) ([]modTimeInfo,error) {
    var infos []modTimeInfo
    err := filepath.Walk(
        root,func(path string,info os.FileInfo,err error) error {
            if err != nil {
                return err
            }
            if info.Mode().IsRegular() {
                path = filepath.Clean(path)
                if !isVideo(path) {
                    return nil
                }
                sep := string(filepath.Separator)
                dir := sep + `Videos` + sep
                path = strings.Replace(path,dir,sep,1)
                infos = append(infos,modTimeInfo{
                    path:    path,modTime: info.ModTime()},)
            }
            return nil
        },)
    if err != nil {
        return nil,err
    }
    return infos,nil
}

func sortModTime(infos []modTimeInfo) {
    sort.SliceStable(
        infos,func(i,j int) bool {
            return infos[i].modTime.Before(infos[j].modTime)
        },)
}

func fmtAge(d time.Duration) string {
    d = d.Round(time.Minute)
    h := d / time.Hour
    d -= h * time.Hour
    m := d / time.Minute
    return fmt.Sprintf("%02d:%02d",m)
}

func main() {
    root := `/home/peter/Videos` // Testing ...
    infos,err := walkModTime(root)
    if err != nil {
        fmt.Println(err)
        return
    }
    sortModTime(infos)
    now := time.Now()
    for _,info := range infos {
        age := fmtAge(now.Sub(info.modTime))
        fmt.Println("Age (H:M):","File:",info.path)
    }
}

游乐场：https://play.golang.org/p/j2TUmJdAi4

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!