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Implement GetObjectNInfo object layer call (#6290)

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This combines calling GetObjectInfo and GetObject while returning a
io.ReadCloser for the object's body. This allows the two operations to
be under a single lock, fixing a race between getting object info and
reading the object body.
This commit is contained in:
Aditya Manthramurthy
2018-08-27 02:58:23 -07:00
committed by Nitish Tiwari
parent cea4f82586
commit e6d740ce09
19 changed files with 926 additions and 69 deletions
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21
cmd/gateway/sia/gateway-sia.go
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@@ -431,6 +431,27 @@ func (s *siaObjects) ListObjects(ctx context.Context, bucket string, prefix stri
return loi, nil
}
func (s *siaObjects) GetObjectNInfo(ctx context.Context, bucket, object string, rs *minio.HTTPRangeSpec) (objInfo minio.ObjectInfo, reader io.ReadCloser, err error) {
objInfo, err = s.GetObjectInfo(ctx, bucket, object)
if err != nil {
return objInfo, reader, err
}
startOffset, length := int64(0), objInfo.Size
if rs != nil {
startOffset, length = rs.GetOffsetLength(objInfo.Size)
}
pr, pw := io.Pipe()
objReader := minio.NewGetObjectReader(pr, nil, nil)
go func() {
err := s.GetObject(ctx, bucket, object, startOffset, length, pw, objInfo.ETag)
pw.CloseWithError(err)
}()
return objInfo, objReader, nil
}
func (s *siaObjects) GetObject(ctx context.Context, bucket string, object string, startOffset int64, length int64, writer io.Writer, etag string) error {
dstFile := path.Join(s.TempDir, minio.MustGetUUID())
defer os.Remove(dstFile)