Logger

Logger middleware for Fiber that logs HTTP request/response details.

Signatures

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

Examples

Import the middleware package that is part of the Fiber web framework

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

After you initiate your Fiber app, you can use the following possibilities:

// Default middleware config
app.Use(logger.New())
// Or extend your config for customization
app.Use(logger.New(logger.Config{
Format: "${pid} ${status} - ${method} ${path}\n",
TimeFormat: "02-Jan-2006",
TimeZone: "America/New_York",
Output: os.Stdout,
}))

Config

// 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
// Output is a writter where logs are written
//
// Default: os.Stderr
Output io.Writer
}

Default Config

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

Constants

// Logger variables
const (
TagPid = "pid"
TagTime = "time"
TagReferer = "referer"
TagProtocol = "protocol"
TagIP = "ip"
TagIPs = "ips"
TagHost = "host"
TagMethod = "method"
TagPath = "path"
TagURL = "url"
TagUA = "ua"
TagLatency = "latency"
TagStatus = "status"
TagBody = "body"
TagBytesSent = "bytesSent"
TagBytesReceived = "bytesReceived"
TagRoute = "route"
TagError = "error"
TagHeader = "header:"
TagQuery = "query:"
TagForm = "form:"
TagCookie = "cookie:"
TagBlack = "black"
TagRed = "red"
TagGreen = "green"
TagYellow = "yellow"
TagBlue = "blue"
TagMagenta = "magenta"
TagCyan = "cyan"
TagWhite = "white"
TagReset = "reset"
)