From eb2f01aee885994a28b3eb28d558f5b7a1c72b5f Mon Sep 17 00:00:00 2001
From: "Daniel A. Nagy" <nagy.da@gmail.com>
Date: Tue, 11 Oct 2016 17:31:29 +0200
Subject: swarm/storage: Allow EOF at the end of the reader in the chunker.
 Handle the case when Read returns less than length of target slice

---
 swarm/storage/chunker.go | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/swarm/storage/chunker.go b/swarm/storage/chunker.go
index b22b4c813..c0f950de5 100644
--- a/swarm/storage/chunker.go
+++ b/swarm/storage/chunker.go
@@ -178,10 +178,14 @@ func (self *TreeChunker) split(depth int, treeSize int64, key Key, data io.Reade
 		// leaf nodes -> content chunks
 		chunkData := make([]byte, size+8)
 		binary.LittleEndian.PutUint64(chunkData[0:8], uint64(size))
-		_, err := data.Read(chunkData[8:])
-		if err != nil {
-			errC <- err
-			return
+		var readBytes int64
+		for readBytes < size {
+			n, err := data.Read(chunkData[8+readBytes:])
+			readBytes += int64(n)
+			if err != nil && !(err == io.EOF && readBytes == size) {
+				errC <- err
+				return
+			}
 		}
 		select {
 		case jobC <- &hashJob{key, chunkData, size, parentWg}:
@@ -371,7 +375,6 @@ func (self *LazyChunkReader) join(b []byte, off int64, eoff int64, depth int, tr
 	defer parentWg.Done()
 	// return NewDPA(&LocalStore{})
 
-
 	// chunk.Size = int64(binary.LittleEndian.Uint64(chunk.SData[0:8]))
 
 	// find appropriate block level
-- 
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