From e3508fffc6fd12b49f4f72b11101b1bdd65b0fff Mon Sep 17 00:00:00 2001
From: Darien Raymond <admin@v2ray.com>
Date: Mon, 28 May 2018 15:38:29 +0200
Subject: [PATCH] deal with empty input in ReadAllToBytes.

---
 common/buf/multi_buffer.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/buf/multi_buffer.go b/common/buf/multi_buffer.go
index 758c88264..6f92717cd 100644
--- a/common/buf/multi_buffer.go
+++ b/common/buf/multi_buffer.go
@@ -47,6 +47,9 @@ func ReadAllToBytes(reader io.Reader) ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
+	if mb.Len() == 0 {
+		return nil, nil
+	}
 	b := make([]byte, mb.Len())
 	common.Must2(mb.Read(b))
 	mb.Release()