How to use Middleware handler

[Murugesan]

Question Description

Middleware in the handler is not working as expected.

Code Snippet (optional)

package main

import (
	"crypto/sha256"
	"crypto/subtle"
	"fmt"

	"github.com/gofiber/fiber/v3"
	"github.com/gofiber/fiber/v3/middleware/keyauth"
)

var (
	apiKey = "correct horse battery staple"
)

func validateAPIKey(c fiber.Ctx, key string) (bool, error) {
	hashedAPIKey := sha256.Sum256([]byte(apiKey))
	hashedKey := sha256.Sum256([]byte(key))

	if subtle.ConstantTimeCompare(hashedAPIKey[:], hashedKey[:]) == 1 {
		fmt.Println("checkpoint: 14-April-2024: _____________--_______-______-    validateAPIKey   -______--_________--")
		return true, nil
	}
	fmt.Println("checkpoint: 14-April-2024: _____________--_______-______-    validateAPIKey false  -______--_________--")
	return false, keyauth.ErrMissingOrMalformedAPIKey
}

func AuthMiddleWare() fiber.Handler {
	fmt.Println("checkpoint: 14-April-2024: _____________--_______-______-    AuthMiddleWare   -______--_________--")
	return keyauth.New(keyauth.Config{
		//Next:      authFilter,
		KeyLookup: "cookie:access_token",
		Validator: validateAPIKey,
	})
}

func Profile(ctx fiber.Ctx) error {
	return ctx.Status(fiber.StatusOK).JSON(SuccessResponseStringData("User info"))
}

func SuccessResponseStringData(message string) *fiber.Map {
	return &fiber.Map{
		"status":  "success",
		"error":   false,
		"message": message,
	}
}

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

	app.Get("/", func(c fiber.Ctx) error {
		return c.SendString("Welcome")
	})
	app.Get("/authenticated", AuthMiddleWare(), Profile)

	app.Listen(":3000")
}

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• I have checked for existing issues that describe my questions prior to opening this one.
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[Juan Calderon-Perez]

@vibhuh This is a bug in the documentation,

// v2
func (app *App) Get(path string, handlers ...Handler) Router

// v3
func (app *App) Get(path string, handler Handler, middleware ...Handler) Router

Try changing this line:
-> app.Get("/authenticated", AuthMiddleWare(), Profile)
To this line:
-> app.Get("/authenticated", Profile, AuthMiddleWare)

[Juan Calderon-Perez]

@vibhuh Does that solve your issue?