optimize: logging with fields (#5066)

core/logx/logs.go

@@ -10,7 +10,6 @@ import (
 	"runtime/debug"
 	"sync"
 	"sync/atomic"
-	"time"
 
 	"github.com/zeromicro/go-zero/core/sysx"
 )
@@ -187,39 +186,9 @@ func Errorw(msg string, fields ...LogField) {
 
 // Field returns a LogField for the given key and value.
 func Field(key string, value any) LogField {
-	switch val := value.(type) {
+	return LogField{
-	case error:
+		Key:   key,
-		return LogField{Key: key, Value: encodeError(val)}
+		Value: value,
-	case []error:
-		var errs []string
-		for _, err := range val {
-			errs = append(errs, encodeError(err))
-		}
-		return LogField{Key: key, Value: errs}
-	case time.Duration:
-		return LogField{Key: key, Value: fmt.Sprint(val)}
-	case []time.Duration:
-		var durs []string
-		for _, dur := range val {
-			durs = append(durs, fmt.Sprint(dur))
-		}
-		return LogField{Key: key, Value: durs}
-	case []time.Time:
-		var times []string
-		for _, t := range val {
-			times = append(times, fmt.Sprint(t))
-		}
-		return LogField{Key: key, Value: times}
-	case fmt.Stringer:
-		return LogField{Key: key, Value: encodeStringer(val)}
-	case []fmt.Stringer:
-		var strs []string
-		for _, str := range val {
-			strs = append(strs, encodeStringer(str))
-		}
-		return LogField{Key: key, Value: strs}
-	default:
-		return LogField{Key: key, Value: val}
 	}
 }
 

core/logx/logs_test.go

@@ -1,6 +1,7 @@
 package logx
 
 import (
+	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -856,6 +857,95 @@ func TestWithKeepDays(t *testing.T) {
 	assert.Equal(t, 1, opt.keepDays)
 }
 
+func TestWithField_LogLevel(t *testing.T) {
+	tests := []struct {
+		name  string
+		level uint32
+		fn    func(string, ...LogField)
+		count int32
+	}{
+		{
+			name:  "debug/info",
+			level: DebugLevel,
+			fn:    Infow,
+			count: 1,
+		},
+		{
+			name:  "info/error",
+			level: InfoLevel,
+			fn:    Errorw,
+			count: 1,
+		},
+		{
+			name:  "info/info",
+			level: InfoLevel,
+			fn:    Infow,
+			count: 1,
+		},
+		{
+			name:  "info/severe",
+			level: InfoLevel,
+			fn:    Errorw,
+			count: 1,
+		},
+		{
+			name:  "error/info",
+			level: ErrorLevel,
+			fn:    Infow,
+			count: 0,
+		},
+		{
+			name:  "error/debug",
+			level: ErrorLevel,
+			fn:    Debugw,
+			count: 0,
+		},
+	}
+
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			olevel := atomic.LoadUint32(&logLevel)
+			SetLevel(tt.level)
+			defer SetLevel(olevel)
+
+			var val countingStringer
+			tt.fn("hello there", Field("foo", &val))
+			assert.Equal(t, tt.count, val.Count())
+		})
+	}
+}
+
+func TestWithField_LogLevelWithContext(t *testing.T) {
+	t.Run("context more than once with info/info", func(t *testing.T) {
+		olevel := atomic.LoadUint32(&logLevel)
+		SetLevel(InfoLevel)
+		defer SetLevel(olevel)
+
+		var val countingStringer
+		ctx := ContextWithFields(context.Background(), Field("foo", &val))
+		logger := WithContext(ctx)
+		logger.Info("hello there")
+		logger.Info("hello there")
+		logger.Info("hello there")
+		assert.True(t, val.Count() > 0)
+	})
+
+	t.Run("context more than once with error/info", func(t *testing.T) {
+		olevel := atomic.LoadUint32(&logLevel)
+		SetLevel(ErrorLevel)
+		defer SetLevel(olevel)
+
+		var val countingStringer
+		ctx := ContextWithFields(context.Background(), Field("foo", &val))
+		logger := WithContext(ctx)
+		logger.Info("hello there")
+		logger.Info("hello there")
+		logger.Info("hello there")
+		assert.Equal(t, int32(0), val.Count())
+	})
+}
+
 func BenchmarkCopyByteSliceAppend(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		var buf []byte
@@ -1054,3 +1144,16 @@ type panicStringer struct {
 func (s panicStringer) String() string {
 	panic("panic")
 }
+
+type countingStringer struct {
+	count int32
+}
+
+func (s *countingStringer) Count() int32 {
+	return atomic.LoadInt32(&s.count)
+}
+
+func (s *countingStringer) String() string {
+	atomic.AddInt32(&s.count, 1)
+	return "countingStringer"
+}

core/logx/writer.go

@@ -10,6 +10,7 @@ import (
 	"runtime/debug"
 	"sync"
 	"sync/atomic"
+	"time"
 
 	fatihcolor "github.com/fatih/color"
 	"github.com/zeromicro/go-zero/core/color"
@@ -380,7 +381,10 @@ func output(writer io.Writer, level string, val any, fields ...LogField) {
 	// +3 for timestamp, level and content
 	entry := make(logEntry, len(fields)+3)
 	for _, field := range fields {
-		entry[field.Key] = maskSensitive(field.Value)
+		// mask sensitive data before processing types,
+		// in case field.Value is a sensitive type and also implemented fmt.Stringer.
+		mval := maskSensitive(field.Value)
+		entry[field.Key] = processFieldValue(mval)
 	}
 
 	switch atomic.LoadUint32(&encoding) {
@@ -395,6 +399,43 @@ func output(writer io.Writer, level string, val any, fields ...LogField) {
 	}
 }
 
+func processFieldValue(value any) any {
+	switch val := value.(type) {
+	case error:
+		return encodeError(val)
+	case []error:
+		var errs []string
+		for _, err := range val {
+			errs = append(errs, encodeError(err))
+		}
+		return errs
+	case time.Duration:
+		return fmt.Sprint(val)
+	case []time.Duration:
+		var durs []string
+		for _, dur := range val {
+			durs = append(durs, fmt.Sprint(dur))
+		}
+		return durs
+	case []time.Time:
+		var times []string
+		for _, t := range val {
+			times = append(times, fmt.Sprint(t))
+		}
+		return times
+	case fmt.Stringer:
+		return encodeStringer(val)
+	case []fmt.Stringer:
+		var strs []string
+		for _, str := range val {
+			strs = append(strs, encodeStringer(str))
+		}
+		return strs
+	default:
+		return val
+	}
+}
+
 func wrapLevelWithColor(level string) string {
 	var colour color.Color
 	switch level {