feat(log):加入zerolog和lumberjack的支持，实现日志功能的初步封装。

logger/logger.go

@@ -0,0 +1,61 @@
+package logger
+
+import (
+	"io"
+	"os"
+
+	"github.com/rs/zerolog"
+	"github.com/samber/lo"
+)
+
+var logger *zerolog.Logger
+
+func init() {
+	var writers []io.Writer
+
+	writers = append(writers, zerolog.ConsoleWriter{Out: os.Stderr})
+	writers = append(writers, newRollingWriter())
+	mw := io.MultiWriter(writers...)
+	logger = lo.ToPtr(zerolog.New(mw).With().Timestamp().Logger())
+	logger.Info().Msg("Logger initialized.")
+}
+
+func Panic() *zerolog.Event {
+	return logger.Panic()
+}
+
+func Fatal() *zerolog.Event {
+	return logger.Fatal()
+}
+
+func Error() *zerolog.Event {
+	return logger.Error()
+}
+
+func Warn() *zerolog.Event {
+	return logger.Warn()
+}
+
+func Info() *zerolog.Event {
+	return logger.Info()
+}
+
+func Debug() *zerolog.Event {
+	return logger.Debug()
+}
+
+func Trace() *zerolog.Event {
+	return logger.Trace()
+}
+
+func Print(v ...interface{}) {
+	logger.Print(v...)
+}
+
+func Printf(format string, v ...interface{}) {
+	logger.Printf(format, v...)
+}
+
+func With() zerolog.Context {
+	return logger.With()
+}

logger/middleware.go

@@ -0,0 +1,43 @@
+package logger
+
+import (
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+func Logger() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		start := time.Now()
+		path := c.Request.URL.Path
+		raw := c.Request.URL.RawQuery
+
+		// Process request
+		c.Next()
+
+		latency := time.Since(start)
+
+		clientIP := c.ClientIP()
+		method := c.Request.Method
+		statusCode := c.Writer.Status()
+
+		comment := c.Errors.ByType(gin.ErrorTypePrivate).String()
+
+		if raw != "" {
+			path = path + "?" + raw
+		}
+
+		event := logger.Info()
+		if comment != "" {
+			event = logger.Error()
+		}
+
+		event.
+			Int("statusCode", statusCode).
+			Dur("latency", latency).
+			Str("clientIP", clientIP).
+			Str("method", method).
+			Str("path", path).
+			Msg(comment)
+	}
+}

logger/rolling.go

@@ -0,0 +1,27 @@
+package logger
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"time"
+
+	"github.com/rs/zerolog/log"
+	"gopkg.in/natefinch/lumberjack.v2"
+)
+
+func newRollingWriter() io.Writer {
+	if err := os.MkdirAll("log", 0744); err != nil {
+		log.Error().Err(err).Str("path", "./log").Msg("不能创建用于保存日志的目录。")
+		return nil
+	}
+
+	now := time.Now()
+
+	return &lumberjack.Logger{
+		Filename:   fmt.Sprintf("log/%04d-%02d-%02d.log", now.Year(), now.Month(), now.Day()),
+		MaxBackups: 0,   // files
+		MaxSize:    200, // megabytes
+		MaxAge:     0,   // days
+	}
+}