Clear on Server shutdown?

[MTRNord]

Hi I would like to clear the Session on Server shutdown because that logs my Users out. Is this possible?

[ghiewa]

defer ?

[MTRNord]

Not sure what that means. I am just starting to learn go. Could you give me a code example?

[ghiewa]

What I said defer should looks like,

	router.Use(func(c *gin.Context) {
		defer func() {
			session := sessions.Default(c)
			session.Clear()
			session.Save()
		}()
		c.Next()
	})

but tricky thing is I fail to archieve the goal. are checking if MaxAge = -1 is ok or not

[ghiewa]

sad! I can't delete cookie as well. My coding like this in a logout handler,

func Logout(ctx *gin.Context) {
	session := sessions.Default(ctx)
	session.Clear()
	//session.Options(sessions.Options{MaxAge:-1})  // TODO
	err := session.Save()
	if err != nil {
		log.Println(err)
	}
	ctx.Redirect(http.StatusMovedPermanently, login_url)
}

@appleboy help us!

[zereraz]

I am facing the issue of losing the session on server restart. Redis key that worked is still in redis, cookie I send is also the same, only thing that changes is server restart and somehow the session is gone! Please let me know what to change.

[ShawnOY]

Hi @ghiewa , I have same issue, and I found the reason.

In my case, I use 301 code to redirect, first time is working, if I try to logout again and it's not working, I found my browser cache the 301 redirect, 301 is move permanently, when I change from 301 to 302, it's work!

In your case, try to use http.StatusFound.

[jarmo]

Easiest way to reset all sessions on a server restart would be to change authentication and/or encryption keys on each restart. For example:

sessionStore := cookie.NewStore(generateRandomBytes(64), generateRandomBytes(32))
router.Use(sessions.Sessions("mysite", sessionStore))

Don't forget to use crypto/rand instead of math/rand for generating your random bytes!