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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
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)
// but we don't want to make these files executable - so ensure that we mask out the executable bits
if err := util.ApplyUmask(p, os.ModePerm&0o666); 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.WalkDir(l.dir, func(path string, d os.DirEntry, 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 d.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)
}
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