forgejo/modules/storage/local.go
Nulo (he/him) cca189ef97
Save files in local storage as umask (#21198)
Go creates temporary files as 600, but sometimes we want the group to be able to read them (for example,
for another user to back up the storage)

This PR applies the umask to the renamed tmp files in local storage.

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
2022-09-24 21:04:14 +08:00

162 lines
3.6 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package storage
import (
"context"
"io"
"net/url"
"os"
"path"
"path/filepath"
"strings"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/util"
)
var _ ObjectStorage = &LocalStorage{}
// LocalStorageType is the type descriptor for local storage
const LocalStorageType Type = "local"
// LocalStorageConfig represents the configuration for a local storage
type LocalStorageConfig struct {
Path string `ini:"PATH"`
TemporaryPath string `ini:"TEMPORARY_PATH"`
}
// LocalStorage represents a local files storage
type LocalStorage struct {
ctx context.Context
dir string
tmpdir string
}
// NewLocalStorage returns a local files
func NewLocalStorage(ctx context.Context, cfg interface{}) (ObjectStorage, error) {
configInterface, err := toConfig(LocalStorageConfig{}, cfg)
if err != nil {
return nil, err
}
config := configInterface.(LocalStorageConfig)
log.Info("Creating new Local Storage at %s", config.Path)
if err := os.MkdirAll(config.Path, os.ModePerm); err != nil {
return nil, err
}
if config.TemporaryPath == "" {
config.TemporaryPath = config.Path + "/tmp"
}
return &LocalStorage{
ctx: ctx,
dir: config.Path,
tmpdir: config.TemporaryPath,
}, nil
}
func (l *LocalStorage) buildLocalPath(p string) string {
return filepath.Join(l.dir, path.Clean("/" + strings.ReplaceAll(p, "\\", "/"))[1:])
}
// Open a file
func (l *LocalStorage) Open(path string) (Object, error) {
return os.Open(l.buildLocalPath(path))
}
// Save a file
func (l *LocalStorage) Save(path string, r io.Reader, size int64) (int64, error) {
p := l.buildLocalPath(path)
if err := os.MkdirAll(filepath.Dir(p), os.ModePerm); err != nil {
return 0, err
}
// Create a temporary file to save to
if err := os.MkdirAll(l.tmpdir, os.ModePerm); err != nil {
return 0, err
}
tmp, err := os.CreateTemp(l.tmpdir, "upload-*")
if err != nil {
return 0, err
}
tmpRemoved := false
defer func() {
if !tmpRemoved {
_ = util.Remove(tmp.Name())
}
}()
n, err := io.Copy(tmp, r)
if err != nil {
return 0, err
}
if err := tmp.Close(); err != nil {
return 0, err
}
if err := util.Rename(tmp.Name(), p); err != nil {
return 0, err
}
// Golang's tmp file (os.CreateTemp) always have 0o600 mode, so we need to change the file to follow the umask (as what Create/MkDir does)
if err := util.ApplyUmask(p, os.ModePerm); err != nil {
return 0, err
}
tmpRemoved = true
return n, nil
}
// Stat returns the info of the file
func (l *LocalStorage) Stat(path string) (os.FileInfo, error) {
return os.Stat(l.buildLocalPath(path))
}
// Delete delete a file
func (l *LocalStorage) Delete(path string) error {
return util.Remove(l.buildLocalPath(path))
}
// URL gets the redirect URL to a file
func (l *LocalStorage) URL(path, name string) (*url.URL, error) {
return nil, ErrURLNotSupported
}
// IterateObjects iterates across the objects in the local storage
func (l *LocalStorage) IterateObjects(fn func(path string, obj Object) error) error {
return filepath.Walk(l.dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
select {
case <-l.ctx.Done():
return l.ctx.Err()
default:
}
if path == l.dir {
return nil
}
if info.IsDir() {
return nil
}
relPath, err := filepath.Rel(l.dir, path)
if err != nil {
return err
}
obj, err := os.Open(path)
if err != nil {
return err
}
defer obj.Close()
return fn(relPath, obj)
})
}
func init() {
RegisterStorageType(LocalStorageType, NewLocalStorage)
}