func read(r io.Reader, f func(*rardecode.Reader, *rardecode.FileHeader) (stop bool)) error {
d, err := rardecode.NewReader(r, "")
if err != nil {
return err
}
for {
fh, err := d.Next()
if err == io.EOF {
break
} else if err != nil {
return err
} else if fh.IsDir {
continue
}
if f(d, fh) {
break
}
}
return nil
}
// extract a rar file and save content into a bok directory
func extract(f string) (err error) {
err = os.Setenv("MDB_JET3_CHARSET", "cp1256")
if err != nil {
return err
}
if _, err := os.Stat("bok"); os.IsNotExist(err) {
if err := os.MkdirAll("bok", 0755); err != nil {
log.Println(err)
return err
}
} else if err != nil {
return err
}
// cmd := exec.Command("unrar", "e", "../downloads/"+f)
// cmd.Dir = "bok"
// cmd.Stdout = os.Stdout
// cmd.Stderr = os.Stderr
// if err := cmd.Run(); err != nil {
// log.Println(err)
// return err
// }
// id of the book
id := strings.Split(f, ".")[0]
nfn := id + ".bok"
rarfile, err := os.Open(filepath.Join("downloads", f))
if err != nil {
return err
}
rdr, err := rardecode.NewReader(rarfile, "")
if err != nil {
return err
}
_, err = rdr.Next()
if err != nil {
return err
}
newbok, err := os.Create(filepath.Join("bok", nfn))
defer newbok.Close()
if err != nil {
return err
}
fmt.Printf("%v being extracted ....", nfn)
_, err = io.Copy(newbok, rdr)
if err != nil {
newbok.Close()
fmt.Printf("error!")
rm := exec.Command("rm", nfn)
rm.Stderr = os.Stderr
if err = rm.Run(); err != nil {
fmt.Printf(" - Could not remove file [" + nfn + "]\n")
}
return err
}
fmt.Printf("done!\n")
return nil
}