Improving EncoderStream to return error only upon non io.EOF.

io.EOF is okay since io.ReadFull will not have read any bytes at all.

Also making error channel receive only for go routine.

pkg/erasure/erasure_encode.go

@@ -171,7 +171,7 @@ func (e *Erasure) Encode(inputData []byte) (encodedBlocks [][]byte, err error) {
 	// Allocate memory to the "encoded blocks" return buffer
 	encodedBlocks = make([][]byte, n) // Return buffer
 
-	// Nessary to bridge Go to the C world. C requires 2D arry of pointers to
+	// Neccessary to bridge Go to the C world. C requires 2D arry of pointers to
 	// byte array. "encodedBlocks" is a 2D slice.
 	pointersToEncodedBlock := make([]*byte, n) // Pointers to encoded blocks.
 
@@ -211,17 +211,23 @@ func (e *Erasure) EncodeStream(data io.Reader, size int64) ([][]byte, []byte, er
 	// Length of total number of "n" data chunks
 	encodedDataBlocksLen := encodedBlockLen * n
 
+	// allocate byte array for encodedBlock length
 	inputData := make([]byte, size, encodedDataBlocksLen)
 
 	_, err := io.ReadFull(data, inputData)
 	if err != nil {
-		return nil, nil, err
+		// do not check for io.ErrUnexpectedEOF, we know the right amount of size
+		// to be read if its a short read we need to throw error since reader could
+		// have been prematurely closed.
+		if err != io.EOF {
+			return nil, nil, err
+		}
 	}
 
 	// Allocate memory to the "encoded blocks" return buffer
 	encodedBlocks := make([][]byte, n) // Return buffer
 
-	// Nessary to bridge Go to the C world. C requires 2D arry of pointers to
+	// Neccessary to bridge Go to the C world. C requires 2D arry of pointers to
 	// byte array. "encodedBlocks" is a 2D slice.
 	pointersToEncodedBlock := make([]*byte, n) // Pointers to encoded blocks.