reset to master

Signed-off-by: runzexia <runzexia@yunify.com>

pkg/utils/readerutils/MD5Reader.go

@@ -0,0 +1,31 @@
+package readerutils
+
+import (
+	"crypto/md5"
+	"hash"
+	"io"
+)
+
+type MD5Reader struct {
+	md5  hash.Hash
+	body io.Reader
+}
+
+func (reader *MD5Reader) Read(b []byte) (int, error) {
+	n, err := reader.body.Read(b)
+	if err != nil {
+		return n, err
+	}
+	return reader.md5.Write(b[:n])
+}
+
+func (reader *MD5Reader) MD5() []byte {
+	return reader.md5.Sum(nil)
+}
+
+func NewMD5Reader(reader io.Reader) *MD5Reader {
+	return &MD5Reader{
+		md5:  md5.New(),
+		body: reader,
+	}
+}