func main() {
count := 5000
bar := pb.New(count)
// show percents (by default already true)
bar.ShowPercent = true
// show bar (by default already true)
bar.ShowPercent = true
// no need counters
bar.ShowCounters = true
bar.ShowTimeLeft = true
// and start
bar.Start()
for i := 0; i < count; i++ {
bar.Increment()
time.Sleep(time.Millisecond)
}
bar.FinishPrint("The End!")
}
func main() {
// check args
if len(os.Args) < 3 {
printUsage()
return
}
sourceName, destName := os.Args[1], os.Args[2]
// check source
var source io.Reader
var sourceSize int64
if strings.HasPrefix(sourceName, "http://") {
// open as url
resp, err := http.Get(sourceName)
if err != nil {
fmt.Printf("Can't get %s: %v\n", sourceName, err)
return
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
fmt.Printf("Server return non-200 status: %v\n", resp.Status)
return
}
i, _ := strconv.Atoi(resp.Header.Get("Content-Length"))
sourceSize = int64(i)
source = resp.Body
} else {
// open as file
s, err := os.Open(sourceName)
if err != nil {
fmt.Printf("Can't open %s: %v\n", sourceName, err)
return
}
defer s.Close()
// get source size
sourceStat, err := s.Stat()
if err != nil {
fmt.Printf("Can't stat %s: %v\n", sourceName, err)
return
}
sourceSize = sourceStat.Size()
source = s
}
// create dest
dest, err := os.Create(destName)
if err != nil {
fmt.Printf("Can't create %s: %v\n", destName, err)
return
}
defer dest.Close()
// create bar
bar := pb.New(int(sourceSize)).SetUnits(pb.U_BYTES).SetRefreshRate(time.Millisecond * 10)
bar.ShowSpeed = true
bar.Start()
// create multi writer
writer := io.MultiWriter(dest, bar)
// and copy
io.Copy(writer, source)
bar.Finish()
}