148 lines
3.6 KiB
Go
148 lines
3.6 KiB
Go
package main
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"io"
|
|
"log"
|
|
"os"
|
|
"path"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/minio/minio-go/v7"
|
|
"golang.org/x/net/webdav"
|
|
)
|
|
|
|
/*
|
|
* S3FS lifetime is limited to a single request
|
|
* Conversely, Golang's abstraction has been thought to be shared between users
|
|
* Sharing an instance between users would be very dangerous (as we would need many checks between shared values)
|
|
*/
|
|
type S3FS struct {
|
|
cache map[string]*S3Stat
|
|
mc *minio.Client
|
|
ctx context.Context
|
|
}
|
|
|
|
func NewS3FS(mc *minio.Client) S3FS {
|
|
return S3FS{
|
|
cache: make(map[string]*S3Stat),
|
|
mc: mc,
|
|
}
|
|
}
|
|
|
|
func (s S3FS) Mkdir(ctx context.Context, name string, perm os.FileMode) error {
|
|
s.ctx = ctx
|
|
|
|
p := NewS3Path(name)
|
|
|
|
if p.class == ROOT {
|
|
return errors.New("Unable to create another root folder")
|
|
} else if p.class == BUCKET {
|
|
log.Println("Creating bucket is not implemented yet")
|
|
return nil
|
|
}
|
|
|
|
f, err := NewS3File(&s, path.Join(name, ".bagage"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close()
|
|
|
|
_, err = io.Copy(f, strings.NewReader("This is a placeholder"))
|
|
return nil
|
|
}
|
|
|
|
func (s S3FS) OpenFile(ctx context.Context, name string, flag int, perm os.FileMode) (webdav.File, error) {
|
|
s.ctx = ctx
|
|
|
|
// If the file does not exist when opening it, we create a stub
|
|
if _, ok := s.cache[name]; !ok {
|
|
st := new(S3Stat)
|
|
st.fs = &s
|
|
st.path = NewS3Path(name)
|
|
st.path.class = OBJECT
|
|
st.obj.Key = st.path.key
|
|
st.obj.LastModified = time.Now()
|
|
s.cache[name] = st
|
|
}
|
|
|
|
return NewS3File(&s, name)
|
|
}
|
|
|
|
func (s S3FS) RemoveAll(ctx context.Context, name string) error {
|
|
//@FIXME nautilus deletes files one by one, at the end, it does not find its folder as it is "already deleted"
|
|
s.ctx = ctx
|
|
|
|
p := NewS3Path(name)
|
|
if p.class == ROOT {
|
|
return errors.New("Unable to create another root folder")
|
|
} else if p.class == BUCKET {
|
|
log.Println("Deleting bucket is not implemented yet")
|
|
return nil
|
|
}
|
|
|
|
objCh := s.mc.ListObjects(s.ctx, p.bucket, minio.ListObjectsOptions{Prefix: p.key, Recursive: true})
|
|
rmCh := s.mc.RemoveObjects(s.ctx, p.bucket, objCh, minio.RemoveObjectsOptions{})
|
|
|
|
for rErr := range rmCh {
|
|
return rErr.Err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s S3FS) Rename(ctx context.Context, oldName, newName string) error {
|
|
s.ctx = ctx
|
|
|
|
po := NewS3Path(oldName)
|
|
pn := NewS3Path(newName)
|
|
if po.class == ROOT || pn.class == ROOT {
|
|
return errors.New("Unable to rename root folder")
|
|
} else if po.class == BUCKET || pn.class == BUCKET {
|
|
log.Println("Moving a bucket is not implemented yet")
|
|
return nil
|
|
}
|
|
|
|
//Check that newName is not inside oldName
|
|
if len(newName) > len(oldName) && newName[:len(oldName)] == oldName {
|
|
return errors.New("Cannot move an entity inside itself (eg. moving /data in /data/test is impossible)")
|
|
}
|
|
|
|
//Gather all keys, copy the object, delete the original
|
|
objCh := s.mc.ListObjects(s.ctx, po.bucket, minio.ListObjectsOptions{Prefix: po.key, Recursive: true})
|
|
for obj := range objCh {
|
|
log.Println("found object", obj)
|
|
src := minio.CopySrcOptions{
|
|
Bucket: po.bucket,
|
|
Object: obj.Key,
|
|
}
|
|
|
|
dst := minio.CopyDestOptions{
|
|
Bucket: pn.bucket,
|
|
Object: path.Join(pn.key, obj.Key[len(po.key):]),
|
|
}
|
|
|
|
_, err := s.mc.CopyObject(s.ctx, dst, src)
|
|
log.Println("copy", obj)
|
|
if err != nil {
|
|
log.Println("copy err", err)
|
|
return err
|
|
}
|
|
|
|
log.Println("delete", obj)
|
|
err = s.mc.RemoveObject(s.ctx, po.bucket, obj.Key, minio.RemoveObjectOptions{})
|
|
if err != nil /*&& err.Code != 200*/ /* @FIXME workaround for garage's bug #98 */ {
|
|
log.Println("delete err", err)
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s S3FS) Stat(ctx context.Context, name string) (os.FileInfo, error) {
|
|
s.ctx = ctx
|
|
return NewS3Stat(&s, name)
|
|
}
|