// Del deletes the object from the bucket
func (m master) Del(owner s3intf.Owner, bucket, object string) (err error) {
m.Lock()
o, ok := m.owners[owner.ID()]
m.Unlock()
if !ok {
return errors.New("cannot find owner " + owner.ID())
}
o.Lock()
b, ok := o.buckets[bucket]
o.Unlock()
if !ok {
return errors.New("cannot find bucket " + bucket)
}
if err = b.db.BeginTransaction(); err != nil {
return fmt.Errorf("cannot start transaction: %s", err)
}
defer func() {
if err != nil {
b.db.Rollback()
}
}()
val, e := b.db.Extract(nil, []byte(object))
if e != nil {
err = fmt.Errorf("cannot get %s object: %s", object, e)
return
}
if val == nil {
err = s3intf.NotFound
return
}
vi := new(weedutils.ValInfo)
if err = vi.Decode(val); err != nil {
err = fmt.Errorf("error deserializing %s: %s", val, err)
return
}
if err = m.wm.Delete(vi.Fid); err != nil {
return
}
err = nil
return b.db.Commit()
}
// Get retrieves an object from the bucket
func (m master) Get(owner s3intf.Owner, bucket, object string) (
filename, media string, body io.ReadCloser, size int64, md5 []byte, err error) {
m.Lock()
o, ok := m.owners[owner.ID()]
m.Unlock()
if !ok {
err = errors.New("cannot find owner " + owner.ID())
return
}
o.Lock()
b, ok := o.buckets[bucket]
o.Unlock()
if !ok {
err = errors.New("cannot find bucket " + bucket)
return
}
val, e := b.db.Get(nil, []byte(object))
if e != nil {
err = fmt.Errorf("cannot get %s object: %s", object, e)
return
}
if val == nil {
err = s3intf.NotFound
return
}
vi := new(weedutils.ValInfo)
if err = vi.Decode(val); err != nil {
err = fmt.Errorf("error deserializing %s: %s", val, err)
return
}
filename, media, size, md5 = vi.Filename, vi.ContentType, vi.Size, vi.MD5
body, err = m.wm.Download(vi.Fid)
return
}
func dumpBucket(w io.Writer, db *kv.DB) (err error) {
//log.Printf("dumping %s", db)
io.WriteString(w, `{"name": "`+db.Name()+`", "records": [`)
enc := json.NewEncoder(w)
enum, e := db.SeekFirst()
if e != nil {
if e != io.EOF {
err = e
log.Printf("error getting first: %s", err)
}
return
}
vi := new(weedutils.ValInfo)
for {
k, v, err := enum.Next()
if err != nil {
if err != io.EOF {
log.Printf("error getting next: %s", err)
}
break
}
if err = vi.Decode(v); err != nil {
log.Printf("error decoding %s: %s", v, err)
continue
}
fmt.Fprintf(w, `{"object": %q, "value": `, k)
if err = enc.Encode(vi); err != nil {
log.Printf("error printing %v to json: %s", vi, err)
continue
}
io.WriteString(w, "},\n")
}
io.WriteString(w, "]},\n")
io.WriteString(w, "]},\n")
return nil
}
// Put puts a file as a new object into the bucket
func (m master) Put(owner s3intf.Owner, bucket, object, filename, media string,
body io.Reader, size int64, md5hash []byte) (
err error) {
m.Lock()
o, ok := m.owners[owner.ID()]
m.Unlock()
if !ok {
err = errors.New("cannot find owner " + owner.ID())
return
}
o.Lock()
b, ok := o.buckets[bucket]
o.Unlock()
if !ok {
err = errors.New("cannot find bucket " + bucket)
return
}
if err = b.db.BeginTransaction(); err != nil {
return fmt.Errorf("cannot start transaction: %s", err)
}
defer func() {
if err != nil {
b.db.Rollback()
}
}()
//upload
fid, publicURL, err := m.wm.AssignFid()
if err != nil {
err = fmt.Errorf("error getting fid: %s", err)
return
}
vi := weedutils.ValInfo{Filename: filename, ContentType: media,
Fid: fid, Created: time.Now(), Size: size, MD5: md5hash}
val, err := vi.Encode(nil)
if err != nil {
err = fmt.Errorf("error serializing %v: %s", vi, err)
return
}
if err = b.db.Set([]byte(object), val); err != nil {
err = fmt.Errorf("error storing key in db: %s", err)
return
}
//log.Printf("filename=%q", filename)
var hsh hash.Hash
if vi.MD5 == nil {
hsh = md5.New()
body = io.TeeReader(body, hsh)
}
if _, err = m.wm.UploadAssigned(fid, publicURL, filename, media, body); err != nil {
b.db.Rollback()
err = fmt.Errorf("error uploading to %s: %s", fid, err)
return
}
if vi.MD5 == nil {
vi.MD5 = hsh.Sum(nil)
if val, err = vi.Encode(nil); err != nil {
err = fmt.Errorf("error serializing %v: %s", vi, err)
return
}
if err = b.db.Set([]byte(object), val); err != nil {
err = fmt.Errorf("error storing key in db: %s", err)
return
}
}
//log.Printf("uploading %s [%d] resulted in %s", filename, size, resp)
err = nil
return b.db.Commit()
}
// List lists a bucket, all objects Key starts with prefix, delimiter segments
// Key, thus the returned commonprefixes (think a generalized filepath
// structure, where / is the delimiter, a commonprefix is a subdir)
func (m master) List(owner s3intf.Owner, bucket, prefix, delimiter, marker string,
limit, skip int) (
objects []s3intf.Object, commonprefixes []string,
truncated bool, err error) {
m.Lock()
o, ok := m.owners[owner.ID()]
if !ok {
m.Unlock()
err = fmt.Errorf("unknown owner %s", owner.ID())
return
}
o.Lock()
b, ok := o.buckets[bucket]
o.Unlock()
m.Unlock()
if !ok {
err = fmt.Errorf("unknown bucket %s", bucket)
return
}
err = nil
enum, e := b.db.SeekFirst()
if e != nil {
if e == io.EOF { //empty
return
}
err = fmt.Errorf("error getting first: %s", e)
return
}
var (
key, val []byte
vi = new(weedutils.ValInfo)
etag string
)
objects = make([]s3intf.Object, 0, 64)
f := s3intf.NewListFilter(prefix, delimiter, marker, limit, skip)
for {
if key, val, e = enum.Next(); e != nil {
if e == io.EOF {
break
}
err = fmt.Errorf("error seeking next: %s", e)
return
}
//log.Printf("key=%q", key)
if ok, e = f.Check(string(key)); e != nil {
if e == io.EOF {
break
}
err = fmt.Errorf("error checking %s: %s", key, e)
return
} else if ok {
if err = vi.Decode(val); err != nil {
return
}
if vi.MD5 != nil && len(vi.MD5) == 16 {
etag = hex.EncodeToString(vi.MD5)
} else {
etag = ""
}
objects = append(objects,
s3intf.Object{Key: string(key), Owner: owner,
ETag: etag, LastModified: vi.Created, Size: vi.Size})
}
}
commonprefixes, truncated = f.Result()
return
}
