Gin使用zap替换默认的两个日志中间件

package main

import (
	"encoding/json"
	"fmt"
	"github.com/gin-gonic/gin"
	"github.com/natefinch/lumberjack"
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
	"net"
	"net/http"
	"net/http/httputil"
	"os"
	"runtime/debug"
	"strings"
	"time"
)

// Config 整个项目的配置
type Config struct {
	Mode       string `json:"mode"`
	Port       int    `json:"port"`
	*LogConfig `json:"log"`
}

// LogConfig 日志配置
type LogConfig struct {
	Level      string `json:"level"`
	Filename   string `json:"filename"`
	MaxSize    int    `json:"maxsize"`
	MaxAge     int    `json:"max_age"`
	MaxBackups int    `json:"max_backups"`
}

// Conf 全局配置变量
var Conf = new(Config)

// Init 初始化配置；从指定文件加载配置文件
func Init(filePath string) error {
	b, err := os.ReadFile(filePath)
	if err != nil {
		return err
	}
	return json.Unmarshal(b, Conf)
}

var lg *zap.Logger

// InitLogger 初始化Logger
func InitLogger(cfg *LogConfig) (err error) {
	writeSyncer := getLogWriter(cfg.Filename, cfg.MaxSize, cfg.MaxBackups, cfg.MaxAge)
	encoder := getEncoder()
	var l = new(zapcore.Level)
	err = l.UnmarshalText([]byte(cfg.Level))
	if err != nil {
		return
	}
	core := zapcore.NewCore(encoder, writeSyncer, l)

	lg = zap.New(core, zap.AddCaller())
	zap.ReplaceGlobals(lg) // 替换zap包中全局的logger实例，后续在其他包中只需使用zap.L()调用即可
	return
}

func getEncoder() zapcore.Encoder {
	encoderConfig := zap.NewProductionEncoderConfig()
	encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
	encoderConfig.TimeKey = "time"
	encoderConfig.EncodeLevel = zapcore.CapitalLevelEncoder
	encoderConfig.EncodeDuration = zapcore.SecondsDurationEncoder
	encoderConfig.EncodeCaller = zapcore.ShortCallerEncoder
	return zapcore.NewJSONEncoder(encoderConfig)
}

func getLogWriter(filename string, maxSize, maxBackup, maxAge int) zapcore.WriteSyncer {
	lumberJackLogger := &lumberjack.Logger{
		Filename:   filename,
		MaxSize:    maxSize,
		MaxBackups: maxBackup,
		MaxAge:     maxAge,
	}
	return zapcore.AddSync(lumberJackLogger)
}

// GinLogger 接收gin框架默认的日志
func GinLogger() gin.HandlerFunc {
	return func(c *gin.Context) {
		start := time.Now()
		path := c.Request.URL.Path
		query := c.Request.URL.RawQuery
		c.Next()

		cost := time.Since(start)
		lg.Info(path,
			zap.Int("status", c.Writer.Status()),
			zap.String("method", c.Request.Method),
			zap.String("path", path),
			zap.String("query", query),
			zap.String("ip", c.ClientIP()),
			zap.String("user-agent", c.Request.UserAgent()),
			zap.String("errors", c.Errors.ByType(gin.ErrorTypePrivate).String()),
			zap.Duration("cost", cost),
		)
	}
}

// GinRecovery recover掉项目可能出现的panic，并使用zap记录相关日志
func GinRecovery(stack bool) gin.HandlerFunc {
	return func(c *gin.Context) {
		defer func() {
			if err := recover(); err != nil {
				// Check for a broken connection, as it is not really a
				// condition that warrants a panic stack trace.
				var brokenPipe bool
				if ne, ok := err.(*net.OpError); ok {
					if se, ok := ne.Err.(*os.SyscallError); ok {
						if strings.Contains(strings.ToLower(se.Error()), "broken pipe") || strings.Contains(strings.ToLower(se.Error()), "connection reset by peer") {
							brokenPipe = true
						}
					}
				}

				httpRequest, _ := httputil.DumpRequest(c.Request, false)
				if brokenPipe {
					lg.Error(c.Request.URL.Path,
						zap.Any("error", err),
						zap.String("request", string(httpRequest)),
					)
					// If the connection is dead, we can't write a status to it.
					c.Error(err.(error)) // nolint: errcheck
					c.Abort()
					return
				}

				if stack {
					lg.Error("[Recovery from panic]",
						zap.Any("error", err),
						zap.String("request", string(httpRequest)),
						zap.String("stack", string(debug.Stack())),
					)
				} else {
					lg.Error("[Recovery from panic]",
						zap.Any("error", err),
						zap.String("request", string(httpRequest)),
					)
				}
				c.AbortWithStatus(http.StatusInternalServerError)
			}
		}()
		c.Next()
	}
}

func main() {

	if err := Init("config.json"); err != nil {
		panic(err)
	}
	// init logger
	if err := InitLogger(Conf.LogConfig); err != nil {
		fmt.Printf("初始化日志错误, err:%v\n", err)
		return
	}

	gin.SetMode(Conf.Mode)

	r := gin.Default()
	// 注册zap相关中间件
	r.Use(GinLogger(), GinRecovery(true))

	r.GET("/hello", func(c *gin.Context) {
		// 假设你有一些数据需要记录到日志中
		var (
			name = "张三"
			age  = 20
		)
		// 记录日志并使用zap.Xxx(key, val)记录相关字段
		zap.L().Debug("hello-", zap.String("user", name), zap.Int("age", age))

		c.String(http.StatusOK, "hello")
	})

	addr := fmt.Sprintf(":%v", Conf.Port)
	err := r.Run(addr)
	if err != nil {
		panic(err)
	}
}

{
  "mode": "release",
  "port": 8000,
  "log": {
    "level": "debug",
    "filename": "data.log",
    "maxsize": 200,
    "max_age": 7,
    "max_backups": 10
  }
}