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gitea/modules/storage/storage.go
zeripath 076bb8a2a2
Close storage objects before cleaning (#16934)
Storage.Iterate provides the path and an open object. On windows using
local storage means that the objects will be locked thus preventing clean
from deleting them.

This PR simply closes the objects early.

Fix #16932

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-09-03 11:48:49 +01:00

193 lines
5.1 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"
"errors"
"fmt"
"io"
"net/url"
"os"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
var (
// ErrURLNotSupported represents url is not supported
ErrURLNotSupported = errors.New("url method not supported")
)
// ErrInvalidConfiguration is called when there is invalid configuration for a storage
type ErrInvalidConfiguration struct {
cfg interface{}
err error
}
func (err ErrInvalidConfiguration) Error() string {
if err.err != nil {
return fmt.Sprintf("Invalid Configuration Argument: %v: Error: %v", err.cfg, err.err)
}
return fmt.Sprintf("Invalid Configuration Argument: %v", err.cfg)
}
// IsErrInvalidConfiguration checks if an error is an ErrInvalidConfiguration
func IsErrInvalidConfiguration(err error) bool {
_, ok := err.(ErrInvalidConfiguration)
return ok
}
// Type is a type of Storage
type Type string
// NewStorageFunc is a function that creates a storage
type NewStorageFunc func(ctx context.Context, cfg interface{}) (ObjectStorage, error)
var storageMap = map[Type]NewStorageFunc{}
// RegisterStorageType registers a provided storage type with a function to create it
func RegisterStorageType(typ Type, fn func(ctx context.Context, cfg interface{}) (ObjectStorage, error)) {
storageMap[typ] = fn
}
// Object represents the object on the storage
type Object interface {
io.ReadCloser
io.Seeker
Stat() (os.FileInfo, error)
}
// ObjectStorage represents an object storage to handle a bucket and files
type ObjectStorage interface {
Open(path string) (Object, error)
// Save store a object, if size is unknown set -1
Save(path string, r io.Reader, size int64) (int64, error)
Stat(path string) (os.FileInfo, error)
Delete(path string) error
URL(path, name string) (*url.URL, error)
IterateObjects(func(path string, obj Object) error) error
}
// Copy copies a file from source ObjectStorage to dest ObjectStorage
func Copy(dstStorage ObjectStorage, dstPath string, srcStorage ObjectStorage, srcPath string) (int64, error) {
f, err := srcStorage.Open(srcPath)
if err != nil {
return 0, err
}
defer f.Close()
size := int64(-1)
fsinfo, err := f.Stat()
if err == nil {
size = fsinfo.Size()
}
return dstStorage.Save(dstPath, f, size)
}
// Clean delete all the objects in this storage
func Clean(storage ObjectStorage) error {
return storage.IterateObjects(func(path string, obj Object) error {
_ = obj.Close()
return storage.Delete(path)
})
}
// SaveFrom saves data to the ObjectStorage with path p from the callback
func SaveFrom(objStorage ObjectStorage, p string, callback func(w io.Writer) error) error {
pr, pw := io.Pipe()
defer pr.Close()
go func() {
defer pw.Close()
if err := callback(pw); err != nil {
_ = pw.CloseWithError(err)
}
}()
_, err := objStorage.Save(p, pr, -1)
return err
}
var (
// Attachments represents attachments storage
Attachments ObjectStorage
// LFS represents lfs storage
LFS ObjectStorage
// Avatars represents user avatars storage
Avatars ObjectStorage
// RepoAvatars represents repository avatars storage
RepoAvatars ObjectStorage
// RepoArchives represents repository archives storage
RepoArchives ObjectStorage
)
// Init init the stoarge
func Init() error {
if err := initAttachments(); err != nil {
return err
}
if err := initAvatars(); err != nil {
return err
}
if err := initRepoAvatars(); err != nil {
return err
}
if err := initLFS(); err != nil {
return err
}
return initRepoArchives()
}
// NewStorage takes a storage type and some config and returns an ObjectStorage or an error
func NewStorage(typStr string, cfg interface{}) (ObjectStorage, error) {
if len(typStr) == 0 {
typStr = string(LocalStorageType)
}
fn, ok := storageMap[Type(typStr)]
if !ok {
return nil, fmt.Errorf("Unsupported storage type: %s", typStr)
}
return fn(context.Background(), cfg)
}
func initAvatars() (err error) {
log.Info("Initialising Avatar storage with type: %s", setting.Avatar.Storage.Type)
Avatars, err = NewStorage(setting.Avatar.Storage.Type, &setting.Avatar.Storage)
return
}
func initAttachments() (err error) {
log.Info("Initialising Attachment storage with type: %s", setting.Attachment.Storage.Type)
Attachments, err = NewStorage(setting.Attachment.Storage.Type, &setting.Attachment.Storage)
return
}
func initLFS() (err error) {
log.Info("Initialising LFS storage with type: %s", setting.LFS.Storage.Type)
LFS, err = NewStorage(setting.LFS.Storage.Type, &setting.LFS.Storage)
return
}
func initRepoAvatars() (err error) {
log.Info("Initialising Repository Avatar storage with type: %s", setting.RepoAvatar.Storage.Type)
RepoAvatars, err = NewStorage(setting.RepoAvatar.Storage.Type, &setting.RepoAvatar.Storage)
return
}
func initRepoArchives() (err error) {
log.Info("Initialising Repository Archive storage with type: %s", setting.RepoArchive.Storage.Type)
RepoArchives, err = NewStorage(setting.RepoArchive.Storage.Type, &setting.RepoArchive.Storage)
return
}