82 lines
1.6 KiB
Go
82 lines
1.6 KiB
Go
package pb_test
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import (
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"fmt"
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"io"
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"net/http"
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"os"
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"strconv"
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"strings"
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"time"
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"gopkg.in/cheggaaa/pb.v1"
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)
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func Example_copy() {
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// check args
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if len(os.Args) < 3 {
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printUsage()
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return
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}
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sourceName, destName := os.Args[1], os.Args[2]
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// check source
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var source io.Reader
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var sourceSize int64
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if strings.HasPrefix(sourceName, "http://") {
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// open as url
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resp, err := http.Get(sourceName)
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if err != nil {
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fmt.Printf("Can't get %s: %v\n", sourceName, err)
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return
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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fmt.Printf("Server return non-200 status: %v\n", resp.Status)
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return
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}
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i, _ := strconv.Atoi(resp.Header.Get("Content-Length"))
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sourceSize = int64(i)
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source = resp.Body
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} else {
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// open as file
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s, err := os.Open(sourceName)
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if err != nil {
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fmt.Printf("Can't open %s: %v\n", sourceName, err)
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return
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}
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defer s.Close()
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// get source size
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sourceStat, err := s.Stat()
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if err != nil {
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fmt.Printf("Can't stat %s: %v\n", sourceName, err)
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return
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}
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sourceSize = sourceStat.Size()
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source = s
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}
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// create dest
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dest, err := os.Create(destName)
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if err != nil {
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fmt.Printf("Can't create %s: %v\n", destName, err)
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return
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}
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defer dest.Close()
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// create bar
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bar := pb.New(int(sourceSize)).SetUnits(pb.U_BYTES).SetRefreshRate(time.Millisecond * 10)
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bar.ShowSpeed = true
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bar.Start()
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// create proxy reader
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reader := bar.NewProxyReader(source)
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// and copy from reader
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io.Copy(dest, reader)
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bar.Finish()
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}
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func printUsage() {
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fmt.Println("copy [source file or url] [dest file]")
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}
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