🐞 [Bug]: v3 Flash Message with redirect is not working

[patelajay745]

Question Description

I am sending flash message using below code

return c.Redirect().With("status","added").To("/dashboard")

and try to retrieve it using below code

message := c.Redirect().Message("status")

Not getting anything.

Is there anything wrong?

Checklist:

• I agree to follow Fiber's Code of Conduct.
• I have checked for existing issues that describe my questions prior to opening this one.
• I understand that improperly formatted questions may be closed without explanation.

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[ReneWerner87]

thanks for the report we will have a look in the next hours/days

[ReneWerner87]

thx for the report

example:

package main

import (
	"fmt"
	"log"

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

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

	app.Get("/redirectWithRoute", func(c fiber.Ctx) error {
		return c.Redirect().With("status", "Logged in successfully").Route("base")
	})
	app.Get("/redirectWithTo", func(c fiber.Ctx) error {
		return c.Redirect().With("status", "Logged in successfully").To("/")
	})

	app.Get("/", func(c fiber.Ctx) error {
		fmt.Println("messages", c.Redirect().Messages())
		// => Logged in successfully
		return c.SendString(c.Redirect().Message("status"))
	}).Name("base")

	log.Fatalln(app.Listen(":3000"))
}

curl
http://localhost:3000/redirectWithTo
http://localhost:3000/redirectWithRoute

currently there is only the flash messages functionality in the Route method

fiber/redirect.go

Lines 204 to 233 in ba6ea67

	if len(r.messages) > 0 || len(r.oldInput) > 0 {
	messageText := bytebufferpool.Get()
	defer bytebufferpool.Put(messageText)
	// flash messages
	for i, message := range r.messages {
	messageText.WriteString(message)
	// when there are more messages or oldInput -> add a comma
	if len(r.messages)-1 != i || (len(r.messages)-1 == i && len(r.oldInput) > 0) {
	messageText.WriteString(CookieDataSeparator)
	}
	}
	r.messages = r.messages[:0]
	// old input data
	i := 1
	for k, v := range r.oldInput {
	messageText.WriteString(OldInputDataPrefix + k + CookieDataAssigner + v)
	if len(r.oldInput) != i {
	messageText.WriteString(CookieDataSeparator)
	}
	i++
	}
	r.c.Cookie(&Cookie{
	Name: FlashCookieName,
	Value: r.c.app.getString(messageText.Bytes()),
	SessionOnly: true,
	})
	}

but we will move this to the To function

because other methods(Route, Back) are using this internally
https://github.com/gofiber/fiber/blob/main/redirect.go#L250-L253
https://github.com/gofiber/fiber/blob/main/redirect.go#L270