diff --git a/gin.go b/gin.go
index 6e5ea6d79c..ad64c35f2a 100644
--- a/gin.go
+++ b/gin.go
@@ -318,6 +318,7 @@ func (engine *Engine) RunUnix(file string) (err error) {
 		return
 	}
 	defer listener.Close()
+	os.Chmod(file, 0777)
 	err = http.Serve(listener, engine)
 	return
 }
diff --git a/logger.go b/logger.go
index 6d8f838e58..bd28a11cff 100644
--- a/logger.go
+++ b/logger.go
@@ -64,6 +64,8 @@ type LogFormatterParams struct {
 	ErrorMessage string
 	// IsTerm shows whether does gin's output descriptor refers to a terminal.
 	IsTerm bool
+	// BodySize is the size of the Response Body
+	BodySize int
 }
 
 // defaultLogFormatter is the default log format function Logger middleware uses.
@@ -191,6 +193,8 @@ func LoggerWithConfig(conf LoggerConfig) HandlerFunc {
 			param.StatusCode = c.Writer.Status()
 			param.ErrorMessage = c.Errors.ByType(ErrorTypePrivate).String()
 
+			param.BodySize = c.Writer.Size()
+
 			if raw != "" {
 				path = path + "?" + raw
 			}
diff --git a/mode.go b/mode.go
index f787b5cac6..8aa84aa839 100644
--- a/mode.go
+++ b/mode.go
@@ -11,8 +11,8 @@ import (
 	"github.com/gin-gonic/gin/binding"
 )
 
-// ENV_GIN_MODE indicates environment name for gin mode.
-const ENV_GIN_MODE = "GIN_MODE"
+// EnvGinMode indicates environment name for gin mode.
+const EnvGinMode = "GIN_MODE"
 
 const (
 	// DebugMode indicates gin mode is debug.
@@ -44,7 +44,7 @@ var ginMode = debugCode
 var modeName = DebugMode
 
 func init() {
-	mode := os.Getenv(ENV_GIN_MODE)
+	mode := os.Getenv(EnvGinMode)
 	SetMode(mode)
 }
 
diff --git a/mode_test.go b/mode_test.go
index cf27acd861..3dba5150c7 100644
--- a/mode_test.go
+++ b/mode_test.go
@@ -13,13 +13,13 @@ import (
 )
 
 func init() {
-	os.Setenv(ENV_GIN_MODE, TestMode)
+	os.Setenv(EnvGinMode, TestMode)
 }
 
 func TestSetMode(t *testing.T) {
 	assert.Equal(t, testCode, ginMode)
 	assert.Equal(t, TestMode, Mode())
-	os.Unsetenv(ENV_GIN_MODE)
+	os.Unsetenv(EnvGinMode)
 
 	SetMode("")
 	assert.Equal(t, debugCode, ginMode)