6b1266b6b3
* Provide self-registering storage system Signed-off-by: Andrew Thornton <art27@cantab.net> * More simplification Signed-off-by: Andrew Thornton <art27@cantab.net> * Remove old strings from setting Signed-off-by: Andrew Thornton <art27@cantab.net> * oops attachments not attachment Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package storage
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"net/url"
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"os"
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"code.gitea.io/gitea/modules/setting"
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)
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var (
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// ErrURLNotSupported represents url is not supported
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ErrURLNotSupported = errors.New("url method not supported")
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// ErrIterateObjectsNotSupported represents IterateObjects not supported
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ErrIterateObjectsNotSupported = errors.New("iterateObjects method not supported")
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)
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// ErrInvalidConfiguration is called when there is invalid configuration for a storage
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type ErrInvalidConfiguration struct {
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cfg interface{}
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err error
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}
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func (err ErrInvalidConfiguration) Error() string {
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if err.err != nil {
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return fmt.Sprintf("Invalid Configuration Argument: %v: Error: %v", err.cfg, err.err)
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}
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return fmt.Sprintf("Invalid Configuration Argument: %v", err.cfg)
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}
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// IsErrInvalidConfiguration checks if an error is an ErrInvalidConfiguration
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func IsErrInvalidConfiguration(err error) bool {
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_, ok := err.(ErrInvalidConfiguration)
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return ok
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}
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// Type is a type of Storage
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type Type string
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// NewStorageFunc is a function that creates a storage
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type NewStorageFunc func(ctx context.Context, cfg interface{}) (ObjectStorage, error)
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var storageMap = map[Type]NewStorageFunc{}
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// RegisterStorageType registers a provided storage type with a function to create it
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func RegisterStorageType(typ Type, fn func(ctx context.Context, cfg interface{}) (ObjectStorage, error)) {
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storageMap[typ] = fn
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}
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// Object represents the object on the storage
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type Object interface {
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io.ReadCloser
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io.Seeker
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Stat() (os.FileInfo, error)
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}
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// ObjectStorage represents an object storage to handle a bucket and files
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type ObjectStorage interface {
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Open(path string) (Object, error)
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Save(path string, r io.Reader) (int64, error)
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Stat(path string) (os.FileInfo, error)
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Delete(path string) error
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URL(path, name string) (*url.URL, error)
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IterateObjects(func(path string, obj Object) error) error
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}
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// Copy copys a file from source ObjectStorage to dest ObjectStorage
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func Copy(dstStorage ObjectStorage, dstPath string, srcStorage ObjectStorage, srcPath string) (int64, error) {
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f, err := srcStorage.Open(srcPath)
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if err != nil {
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return 0, err
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}
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defer f.Close()
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return dstStorage.Save(dstPath, f)
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}
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var (
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// Attachments represents attachments storage
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Attachments ObjectStorage
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// LFS represents lfs storage
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LFS ObjectStorage
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)
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// Init init the stoarge
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func Init() error {
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if err := initAttachments(); err != nil {
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return err
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}
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return initLFS()
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}
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// NewStorage takes a storage type and some config and returns an ObjectStorage or an error
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func NewStorage(typStr string, cfg interface{}) (ObjectStorage, error) {
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if len(typStr) == 0 {
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typStr = string(LocalStorageType)
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}
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fn, ok := storageMap[Type(typStr)]
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if !ok {
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return nil, fmt.Errorf("Unsupported storage type: %s", typStr)
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}
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return fn(context.Background(), cfg)
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}
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func initAttachments() (err error) {
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Attachments, err = NewStorage(setting.Attachment.Storage.Type, setting.Attachment.Storage)
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return
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}
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func initLFS() (err error) {
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LFS, err = NewStorage(setting.LFS.Storage.Type, setting.LFS.Storage)
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return
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}
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