support configure json escape when log in json format

intlogger.go

@@ -80,12 +80,13 @@ var _ Logger = &intLogger{}
 // intLogger is an internal logger implementation. Internal in that it is
 // defined entirely by this package.
 type intLogger struct {
-	json         bool
-	callerOffset int
-	name         string
-	timeFormat   string
-	timeFn       TimeFunction
-	disableTime  bool
+	json              bool
+	jsonEscapeEnabled bool
+	callerOffset      int
+	name              string
+	timeFormat        string
+	timeFn            TimeFunction
+	disableTime       bool
 
 	// This is an interface so that it's shared by any derived loggers, since
 	// those derived loggers share the bufio.Writer as well.
@@ -173,6 +174,7 @@ func newLogger(opts *LoggerOptions) *intLogger {
 
 	l := &intLogger{
 		json:              opts.JSONFormat,
+		jsonEscapeEnabled: !opts.JSONEscapeDisabled,
 		name:              opts.Name,
 		timeFormat:        TimeFormat,
 		timeFn:            time.Now,
@@ -667,13 +669,17 @@ func (l *intLogger) logJSON(t time.Time, name string, level Level, msg string, a
 		}
 	}
 
-	err := json.NewEncoder(l.writer).Encode(vals)
+	encoder := json.NewEncoder(l.writer)
+	encoder.SetEscapeHTML(l.jsonEscapeEnabled)
+	err := encoder.Encode(vals)
 	if err != nil {
 		if _, ok := err.(*json.UnsupportedTypeError); ok {
 			plainVal := l.jsonMapEntry(t, name, level, msg)
 			plainVal["@warn"] = errJsonUnsupportedTypeMsg
 
-			json.NewEncoder(l.writer).Encode(plainVal)
+			errEncoder := json.NewEncoder(l.writer)
+			errEncoder.SetEscapeHTML(l.jsonEscapeEnabled)
+			errEncoder.Encode(plainVal)
 		}
 	}
 }

logger.go

@@ -264,6 +264,9 @@ type LoggerOptions struct {
 	// Control if the output should be in JSON.
 	JSONFormat bool
 
+	// Control the escape switch of json.Encoder
+	JSONEscapeDisabled bool
+
 	// Include file and line information in each log line
 	IncludeLocation bool
 

logger_test.go

@@ -1232,6 +1232,28 @@ func TestLogger_JSON(t *testing.T) {
 		assert.Equal(t, "[INFO]  test: who=programmer why=testing\n", rest)
 	})
 
+	t.Run("disable json escape when log special character", func(t *testing.T) {
+		var buf bytes.Buffer
+
+		logger := New(&LoggerOptions{
+			Name:               "test",
+			Output:             &buf,
+			JSONFormat:         true,
+			JSONEscapeDisabled: true,
+		})
+
+		logger.Info("this is test and use > < &")
+
+		b := buf.Bytes()
+
+		var raw map[string]interface{}
+		if err := json.Unmarshal(b, &raw); err != nil {
+			t.Fatal(err)
+		}
+
+		assert.Equal(t, "this is test and use > < &", raw["@message"])
+	})
+
 }
 
 type customErrJSON struct {