main.go

func RegisterLogger(out *os.File) gin.HandlerFunc {
	return func(c *gin.Context) {
		// Start timer
		start := time.Now()
		path := c.Request.URL.Path
		raw := c.Request.URL.RawQuery

		// Process request
    c.Next()
    
		// Stop timer
		end := time.Now()
		latency := end.Sub(start)

		clientIP := c.ClientIP()
		method := c.Request.Method
		statusCode := c.Writer.Status()
		comment := c.Errors.String()

		if raw != "" {
			path = path + "?" + raw
		}

		fmt.Fprintf(out, "[GIN] %v | %3d | %13v | %15s | %-7s %s\n%s",
			end.Format("2006/01/02 - 15:04:05"),
			statusCode,
			latency,
			clientIP,
			method,
			path,
			comment,
		)
	}
}