file

func CheckNotExist(src string) bool

func CheckPermission(src string) bool

func GetExt(fileName string) string

func GetSize(f multipart.File) (int, error)

func IsNotExistMkDir(src string) error

func MkAll(src, filename string) error

func MkDir(src string) error

func MustOpen(fileName, filePath string) (*os.File, error)

func Open(name string, flag int, perm os.FileMode) (*os.File, error)