refactoring

weed/operation/chunked_file.go

@@ -8,11 +8,10 @@ import (
 	"io/ioutil"
 	"net/http"
 	"sort"
+	"sync"
 
 	"google.golang.org/grpc"
 
-	"sync"
-
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
@@ -126,6 +125,13 @@ func readChunkNeedle(fileUrl string, w io.Writer, offset int64) (written int64,
 	return io.Copy(w, resp.Body)
 }
 
+func NewChunkedFileReader(chunkManifest *ChunkManifest, master string) *ChunkedFileReader {
+	return &ChunkedFileReader{
+		Manifest: chunkManifest,
+		Master:   master,
+	}
+}
+
 func (cf *ChunkedFileReader) Seek(offset int64, whence int) (int64, error) {
 	var err error
 	switch whence {