go : gin 输出日志文件

我们运行服务端程序，日志直接会打印，本文介绍如何将服务端日志输出到日志文件

代码：

package main

import (
    "io"
    "os"

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

func main() {

    // Logging to a file.
    f, _ := os.Create("gin.log")
    gin.DefaultWriter = io.MultiWriter(f)

    // Use the following code if you need to write the logs to file and console at the same time.
    // gin.DefaultWriter = io.MultiWriter(f, os.Stdout)

    router := gin.Default()
    router.GET("/ping", func(c *gin.Context) {
        c.String(200, "pong")
    })

    router.Run(":8080")
}

运行程序之后服务端没有任何信息输出

再看当前路径下。创建出来一个gin.log的文件

查看日志文件内容

[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.

[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.

- using env: export GIN_MODE=release

- using code: gin.SetMode(gin.ReleaseMode)

[GIN-debug] GET /ping --> main.main.func1 (3 handlers)

[GIN-debug] Listening and serving HTTP on :8080