From c11d84f31414997ac43c3c1e638fe762318110d8 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Thu, 24 May 2018 23:20:56 -0700
Subject: [PATCH] fix reading from a url

---
 weed/util/http_util.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/weed/util/http_util.go b/weed/util/http_util.go
index 00dbdf90f..6494041e3 100644
--- a/weed/util/http_util.go
+++ b/weed/util/http_util.go
@@ -201,7 +201,10 @@ func ReadUrl(fileUrl string, offset int64, size int, buf []byte) (n int64, e err
 	var i, m int
 
 	for {
-		m, err = r.Body.Read(buf[i:cap(buf)])
+		m, err = r.Body.Read(buf[i:])
+		if m == 0 {
+			return
+		}
 		i += m
 		n += int64(m)
 		if err == io.EOF {