From 44637f03ccef3f005da41da5d1880df80cceebb2 Mon Sep 17 00:00:00 2001
From: Unknwon <u@gogs.io>
Date: Sun, 27 Dec 2015 17:02:36 -0500
Subject: [PATCH] #2282 fast detection of utf-8

---
 gogs.go                      | 2 +-
 modules/base/tool.go         | 6 ++++++
 modules/template/template.go | 5 ++---
 templates/.VERSION           | 2 +-
 4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/gogs.go b/gogs.go
index 46d7e3386c..2a424d26ce 100644
--- a/gogs.go
+++ b/gogs.go
@@ -17,7 +17,7 @@ import (
 	"github.com/gogits/gogs/modules/setting"
 )
 
-const APP_VER = "0.8.13.1225"
+const APP_VER = "0.8.13.1227"
 
 func init() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
diff --git a/modules/base/tool.go b/modules/base/tool.go
index 75f475fa4f..5927dad01c 100644
--- a/modules/base/tool.go
+++ b/modules/base/tool.go
@@ -18,6 +18,7 @@ import (
 	"regexp"
 	"strings"
 	"time"
+	"unicode/utf8"
 
 	"github.com/Unknwon/com"
 	"github.com/Unknwon/i18n"
@@ -53,6 +54,11 @@ func ShortSha(sha1 string) string {
 }
 
 func DetectEncoding(content []byte) string {
+	if utf8.Valid(content[:1024]) {
+		log.Debug("Detected encoding: utf-8 (fast)")
+		return "utf-8"
+	}
+
 	_, name, certain := charset.DetermineEncoding(content, "")
 	if name != "utf-8" && len(setting.Repository.AnsiCharset) > 0 {
 		log.Debug("Using default AnsiCharset: %s", setting.Repository.AnsiCharset)
diff --git a/modules/template/template.go b/modules/template/template.go
index 4149de451a..6c070b7009 100644
--- a/modules/template/template.go
+++ b/modules/template/template.go
@@ -12,7 +12,6 @@ import (
 	"runtime"
 	"strings"
 	"time"
-	"unicode/utf8"
 
 	"golang.org/x/net/html/charset"
 	"golang.org/x/text/transform"
@@ -131,11 +130,11 @@ func Sha1(str string) string {
 }
 
 func ToUtf8WithErr(content []byte) (error, string) {
-	if utf8.Valid(content[:1024]) {
+	charsetLabel := base.DetectEncoding(content)
+	if charsetLabel == "utf-8" {
 		return nil, string(content)
 	}
 
-	charsetLabel := base.DetectEncoding(content)
 	encoding, _ := charset.Lookup(charsetLabel)
 	if encoding == nil {
 		return fmt.Errorf("Unknown encoding: %s", charsetLabel), string(content)
diff --git a/templates/.VERSION b/templates/.VERSION
index e0c3ee2f26..cc6aa49acb 100644
--- a/templates/.VERSION
+++ b/templates/.VERSION
@@ -1 +1 @@
-0.8.13.1225
\ No newline at end of file
+0.8.13.1227
\ No newline at end of file