file

func Append(filepath string, content string) error

func Create(name string, filepath string) (*os.File, error)

func DownloadFromUrl(filepath string, url string) error

func ExtName(fileName string) string

func GetContent(filePath string) (string, error)

func IsNotExist(src string) bool

func IsPermission(src string) bool

func MakeDir(src string, perm os.FileMode) error

func MakeDirIfNotExist(src string, perm os.FileMode) error

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

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

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

func WriteContent(filepath string, content string) error