From 7c0c490f1c62301719388fd44df9c29a64213cfb Mon Sep 17 00:00:00 2001
From: hantmac <hantmac@outlook.com>
Date: Sun, 1 Sep 2019 00:06:26 +0800
Subject: [PATCH] bug fix:fix read log file oom

---
 backend/services/log.go | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/backend/services/log.go b/backend/services/log.go
index c6e4f090..2e6f25ed 100644
--- a/backend/services/log.go
+++ b/backend/services/log.go
@@ -34,9 +34,16 @@ func GetLocalLog(logPath string) (fileBytes []byte, err error) {
 		return nil, err
 	}
 	defer f.Close()
-	logBuf := make([]byte, 2048)
-	n, err := f.ReadAt(logBuf, fi.Size()-int64(len(logBuf)))
-	if err != nil {
+	const bufLen = 2048
+	logBuf := make([]byte, bufLen)
+	off := int64(0)
+	if fi.Size() > int64(len(logBuf)) {
+		off = fi.Size() - int64(len(logBuf))
+	}
+	n, err := f.ReadAt(logBuf, off)
+
+	//到文件结尾会有EOF标识
+	if err != nil && err.Error() != "EOF" {
 		log.Error(err.Error())
 		debug.PrintStack()
 		return nil, err