日志文件的写入

package main

import (
    "io"
    "os"

    "github.com/gin-gonic/gin"
)

func main() {
    gin.DisableConsoleColor()

    // Logging to a file.
    f, _ := os.Create("gin.log")
    gin.DefaultWriter = io.MultiWriter(f)
    // 如果需要同时将日志写入文件和控制台，请使用以下代码。
    // gin.DefaultWriter = io.MultiWriter(f, os.Stdout)
    r := gin.Default()
    r.GET("/ping", func(c *gin.Context) {
        c.String(200, "pong")
    })
    r.Run()
}

日志分割

package main

import (
  "fmt"
  "github.com/gin-gonic/gin"
  rotatelogs "github.com/lestrrat-go/file-rotatelogs"
  "github.com/rifflock/lfshook"
  "github.com/sirupsen/logrus"
  "os"
  "path"
  "time"
)

var (
  //日志地址
  logFilePath = "./"
  //日志文件名
  logFileName = "system.log"
)

func logerMiddleware() gin.HandlerFunc {
  // 日志文件
  fileName := path.Join(logFilePath, logFileName)
  // 写入文件
  src, err := os.OpenFile(fileName, os.O_APPEND|os.O_WRONLY, os.ModeAppend)
  if err != nil {
      fmt.Println("err", err)
  }
  // 实例化
  logger := logrus.New()
  //设置日志级别
  logger.SetLevel(logrus.DebugLevel)
  //设置输出
  logger.Out = src
  // 设置 rotatelogs
  logWriter, err := rotatelogs.New(
      // 分割后的文件名称
      fileName+".%Y%m%d.log",

      // 生成软链，指向最新日志文件
      rotatelogs.WithLinkName(fileName),

      // 设置最大保存时间(7天)
      rotatelogs.WithMaxAge(7*24*time.Hour),

      // 设置日志切割时间间隔(1天)
      rotatelogs.WithRotationTime(24*time.Hour),
  )

  writeMap := lfshook.WriterMap{
      logrus.InfoLevel:  logWriter,
      logrus.FatalLevel: logWriter,
      logrus.DebugLevel: logWriter,
      logrus.WarnLevel:  logWriter,
      logrus.ErrorLevel: logWriter,
      logrus.PanicLevel: logWriter,
  }

  logger.AddHook(lfshook.NewHook(writeMap, &logrus.JSONFormatter{
      TimestampFormat: "2006-01-02 15:04:05",
  }))

  return func(c *gin.Context) {
      //开始时间
      startTime := time.Now()
      //处理请求
      c.Next()
      //结束时间
      endTime := time.Now()
      // 执行时间
      latencyTime := endTime.Sub(startTime)
      //请求方式
      reqMethod := c.Request.Method
      //请求路由
      reqUrl := c.Request.RequestURI
      //状态码
      statusCode := c.Writer.Status()
      //请求ip
      clientIP := c.ClientIP()

      // 日志格式
      logger.WithFields(logrus.Fields{
          "status_code":  statusCode,
          "latency_time": latencyTime,
          "client_ip":    clientIP,
          "req_method":   reqMethod,
          "req_uri":      reqUrl,
      }).Info()

  }
}

func main() {
  //禁用控制台颜色
  gin.DisableConsoleColor()
  // Logging to a file.
  // 如果需要同时将日志写入文件和控制台，请使用以下代码。
  r := gin.Default()
  r.Use(logerMiddleware())
  r.GET("/ping", func(c *gin.Context) {
      c.String(200, "pong")
  })
  r.Run()
}