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main.go
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main.go
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package main
import (
"crypto/sha1"
"crypto/sha256"
"fmt"
"io"
"net/http"
"os"
"strings"
"github.com/pkg/xattr"
"github.com/schollz/progressbar/v3"
)
func fileNameFromUrl(url string) string {
if strings.Contains(url, "?") {
url = url[:strings.Index(url, "?")]
}
return url[strings.LastIndex(url, "/")+1:]
}
func main() {
url := os.Args[1]
resp, err := http.Get(url)
if err != nil {
fmt.Fprintf(os.Stderr, "fetch: %v\n", err)
os.Exit(1)
}
defer resp.Body.Close()
fname := fileNameFromUrl(url)
f, err := os.OpenFile(fname, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0666)
if err != nil {
fmt.Fprintf(os.Stderr, "create file: %v\n", err)
os.Exit(1)
}
hash1 := sha1.New()
hash256 := sha256.New()
bar := progressbar.DefaultBytes(
resp.ContentLength,
fname,
)
w := io.MultiWriter(f, bar, hash1, hash256)
_, err = io.Copy(w, resp.Body)
if err == io.EOF {
err = nil
}
if err != nil {
fmt.Fprintf(os.Stderr, "error: %T %v\n", err, err)
os.Exit(1)
}
_ = xattr.FSet(f, "user.sha1sum", []byte(fmt.Sprintf("%x", hash1.Sum(nil))))
_ = xattr.FSet(f, "user.sha256sum", []byte(fmt.Sprintf("%x", hash256.Sum(nil))))
err = xattr.FSet(f, "user.url", []byte(url))
if err != nil {
fmt.Fprintf(os.Stderr, "error setting file attribute: %T %v\n", err, err)
}
f.Close()
}