✨ v3 (feature): refactor logger middleware

[efectn]

• Make middleware extandable for 3rd-party loggers. (🚀 v3 Request: Numerous Minor Enchancements #1828)

[YuilTripathee]

What is the point of keeping the existing logger function in a new default_logger way? Is there example for which other custom logger is possible to call from this by this approach?

[efectn]

What is the point of keeping the existing logger function in a new default_logger way? Is there example for which other custom logger is possible to call from this by this approach?

Zerolog example:

package main

import (
	"os"

	"github.com/gofiber/fiber/v3"
	"github.com/gofiber/fiber/v3/middleware/logger"
	"github.com/rs/zerolog"
	"github.com/rs/zerolog/log"
)

func main() {
	app := fiber.New()

	log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr})

	app.Use(logger.New(logger.Config{LoggerFunc: func(c fiber.Ctx, data logger.LoggerData, cfg logger.Config) error {
		log.Info().
			Str("path", c.Path()).
			Str("method", c.Method()).
			Int("status", c.Response().
				StatusCode()).
			Msg("new request")

		return nil
	}}))

	app.Get("/", func(c fiber.Ctx) error {
		return c.SendString("test")
	})

	app.Listen(":3000")
}

[YuilTripathee]

Need some work on benchmarks to proceed