func New(config ...Config) fiber.Handler

import (
    "github.com/gofiber/fiber/v2"
    "github.com/gofiber/fiber/v2/middleware/logger"
)

// Default middleware config
app.Use(logger.New())

app.Use(logger.New(logger.Config{
        Format:     "[${ip}]:${port} ${status} - ${method} ${path}\n",
}))

app.Use(requestid.New())
​
​app​.​Use​(​logger​.​New​(logger.​Config​{
    // For more options, see the Config section
  Format​: "${pid} ${locals:requestid} ${status} - ${method} ${path}​\n​"​,
}))

app.Use(logger.New(logger.Config{
    Format:     "${pid} ${status} - ${method} ${path}\n",
    TimeFormat: "02-Jan-2006",
    TimeZone:   "America/New_York",
}))

file, err := os.OpenFile("./123.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
    log.Fatalf("error opening file: %v", err)
}
defer file.Close()
​
app.Use(logger.New(logger.Config{
    Output: file,
}))

// Config defines the config for middleware.
type Config struct {
    // Next defines a function to skip this middleware when returned true.
    //
    // Optional. Default: nil
    Next func(c *fiber.Ctx) bool
​
    // Format defines the logging tags
    //
    // Optional. Default: [${time}] ${status} - ${latency} ${method} ${path}\n
    Format string
​
    // TimeFormat https://programming.guide/go/format-parse-string-time-date-example.html
    //
    // Optional. Default: 15:04:05
    TimeFormat string
​
    // TimeZone can be specified, such as "UTC" and "America/New_York" and "Asia/Chongqing", etc
    //
    // Optional. Default: "Local"
    TimeZone string
​
    // TimeInterval is the delay before the timestamp is updated
    //
    // Optional. Default: 500 * time.Millisecond
    TimeInterval time.Duration
​
    // Output is a writter where logs are written
    //
    // Default: os.Stderr
    Output io.Writer
}

var ConfigDefault = Config{
    Next:         nil,
    Format:       "[${time}] ${status} - ${latency} ${method} ${path}\n",
    TimeFormat:   "15:04:05",
    TimeZone:     "Local",
    TimeInterval: 500 * time.Millisecond,
    Output:       os.Stderr,
}

// Logger variables
const (
    TagPid               = "pid"
    TagTime              = "time"
    TagReferer           = "referer"
    TagProtocol          = "protocol"
    TagPort              = "port"
    TagIP                = "ip"
    TagIPs               = "ips"
    TagHost              = "host"
    TagMethod            = "method"
    TagPath              = "path"
    TagURL               = "url"
    TagUA                = "ua"
    TagLatency           = "latency"
    TagStatus            = "status"      // response status
    TagResBody           = "resBody"     // response body
    TagQueryStringParams = "queryParams" // request query parameters
    TagBody              = "body"        // request body
    TagBytesSent         = "bytesSent"
    TagBytesReceived     = "bytesReceived"
    TagRoute             = "route"
    TagError             = "error"
    TagHeader            = "header:"     // DEPRECATED: Use TagReqHeader instead
    TagReqHeader         = "reqHeader:"  // request header
    TagRespHeader        = "respHeader:" // response header
    TagQuery             = "query:"      // request query
    TagForm              = "form:"       // request form
    TagCookie            = "cookie:"     // request cookie
    TagLocals            = "locals:"
​
    // colors
    TagBlack   = "black"
    TagRed     = "red"
    TagGreen   = "green"
    TagYellow  = "yellow"
    TagBlue    = "blue"
    TagMagenta = "magenta"
    TagCyan    = "cyan"
    TagWhite   = "white"
    TagReset   = "reset"
)