file-store/pkg/ifs/dirfs.go

105 lines
2.2 KiB
Go
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package ifs
import (
"io/fs"
"os"
"runtime"
)
type FS interface {
Mkdir(name string, perm fs.FileMode) error
MkdirAll(name string, perm fs.FileMode) error
Open(name string) (fs.File, error)
OpenFile(name string, flag int, perm fs.FileMode) (File, error)
Remove(name string) error
RemoveAll(name string) error
}
func DirFS(dir string) FS {
return dirFS(dir)
}
type File interface {
Stat() (fs.FileInfo, error)
Read([]byte) (int, error)
Write([]byte) (int, error)
Close() error
}
type dirFS string
func (dir dirFS) validPath(name, op string) error {
if !fs.ValidPath(name) || runtime.GOOS == "windows" && containsAny(name, `\:`) {
return &os.PathError{Op: op, Path: name, Err: os.ErrInvalid}
}
return nil
}
func (dir dirFS) Mkdir(name string, perm fs.FileMode) error {
if err := dir.validPath(name, "mkdir"); err != nil {
return err
}
return os.Mkdir(string(dir)+"/"+name, perm)
}
func (dir dirFS) MkdirAll(name string, perm fs.FileMode) error {
if err := dir.validPath(name, "mkdirAll"); err != nil {
return err
}
return os.MkdirAll(string(dir)+"/"+name, perm)
}
func (dir dirFS) Open(name string) (fs.File, error) {
if err := dir.validPath(name, "open"); err != nil {
return nil, err
}
return os.Open(string(dir) + "/" + name)
}
func (dir dirFS) OpenFile(name string, flag int, perm fs.FileMode) (File, error) {
if err := dir.validPath(name, "openFile"); err != nil {
return nil, err
}
f, err := os.OpenFile(string(dir)+"/"+name, flag, perm)
if err != nil {
return nil, err
}
return f, nil
}
func (dir dirFS) Remove(name string) error {
if err := dir.validPath(name, "remove"); err != nil {
return err
}
return os.Remove(string(dir) + "/" + name)
}
func (dir dirFS) RemoveAll(name string) error {
if err := dir.validPath(name, "removeAll"); err != nil {
return err
}
return os.RemoveAll(string(dir) + "/" + name)
}
func (dir dirFS) Stat(name string) (fs.FileInfo, error) {
if err := dir.validPath(name, "stat"); err != nil {
return nil, err
}
f, err := os.Stat(string(dir) + "/" + name)
if err != nil {
return nil, err
}
return f, nil
}
func containsAny(s, chars string) bool {
for i := 0; i < len(s); i++ {
for j := 0; j < len(chars); j++ {
if s[i] == chars[j] {
return true
}
}
}
return false
}