I just did a little test:

1. When redering page1 I'm setting a cookie. I'm also rendering a link
like:
    SHtml.link("/page2", () => {
      S.deleteCookie("marius")
    }, Text("Got to /page1 and remove cookie"))

2. When I click the link page2 is rendered and in the HTTP header I am
seeing the cookie being sent down to browser with no value and the
expires is (1-1-1970 ....). Which is correct.

Br's,
Marius

On Aug 15, 1:30 pm, Richard Dallaway <dalla...@gmail.com> wrote:
> Thank you for the debugging clue (very handy function; I can see
> myself using that in other situations).
>
> What I see when the logout link is followed is:
>
> List()
>
> When I set the cookie originally, I do see a List(HTTPCookie(...))
>
> I'm running all of this on 127.0.0.1:8080.
>
> Thanks
> Richard
>
> On Sat, Aug 15, 2009 at 8:37 AM, marius d.<marius.dan...@gmail.com> wrote:
>
> > Your code looks fine to me. There is notmagic withXHtml.link just that
> > when you click the link on server-side your function gets called
> > before the /logout page gets rendered.
>
> > Can you add a function to LiftRules.onEndServicing ?
>
> > LiftRules.onEndServicing.append {
>
> >  case (req, Full(resp)) =>
> >   val cookies = resp.toResponse.cookies
> >   // trace the cookies
>
> >  case _ =>
> > }
>
> > Br's,
> > Marius
>
> > On Aug 14, 8:20 pm, Richard Dallaway <dalla...@gmail.com> wrote:
> >> I'm seeing some odd behaviour with a cookie I'm setting not being
> >> removed.  I'm unsure which phase of my code is broken or how deep my
> >> misunderstandings are here... so I'm looking for some clues.
>
> >> I'm setting a "keep me logged in" cookie for users of my application.
> >> That works fine using...
>
> >> val c = HTTPCookie(COOKIE_NAME, 
> >> encode(user)).setMaxAge(three_months_as_seconds)
> >> S.addCookie(c)
>
> >> The encode(user) is, when all is said and done, returning the user PK
> >> as the cookie value.
>
> >> I'm not using ProtoUser, I'm using the scheme outlined 
> >> inhttp://groups.google.com/group/liftweb/msg/85a8e790d5efec26
>
> >> That is, I have...
>
> >> object LoginContext {
> >>   object userId extends SessionVar[Box[Long]](KeepMeLoggedIn.findUserId)
> >>   // etc...
>
> >> }
>
> >> ...and the findUserId function tries to decode the cookie and find a
> >> matching user:
>
> >> def findUserId:Box[Long] = for {
> >>          cookie <- S.findCookie(COOKIE_NAME);
> >>          cookie_value <- cookie.value;
> >>          (id, salt) <- decode(cookie_value);
> >>          u <- User.find(By(User.id, id),By(User.salt,salt))
> >>      } yield {
> >>          println(u)
> >>          id
> >>   }
>
> >> And that's all working for me.
>
> >> The problem comes when the user clicks the logout link, and I want to
> >> remove this cookie.
>
> >> The logout link is:
>
> >> SHtml.link("/logout", LoginContext.logout, <span>Logout</span> )
>
> >> ... and LoginContext.logout is
>
> >>     KeepMeLoggedIn.removeCookie()
> >>     // the above is just: S.deleteCookie(COOKIE_NAME)
> >>     userId.remove()
> >>     currentUser.remove()
> >>     S.request.foreach(_.request.session.terminate)
>
> >> And for completeness, my /logout page is a redirect to the home page:
>
> >> Menu(Loc("logout", List("logout") -> false, "Logout", Hidden, If(
> >> ()=>false, ()=>RedirectResponse("/index")) ))
>
> >> What I'm seeing is:
> >>  - user clicks logout
> >>  - logout function called, and Jetty tells me /logout took N
> >> milliseconds to render
> >>  - then I'm seeing activity in the findUserId function, a result is
> >> found, and the user is logged back in again.
> >>  - then Jetty tells me /index took N milliseconds to render.
>
> >> When I dig into HTTP headers, I'm not seeing the cookie value being
> >> set in the response header (which I believe is required to remove it).
>
> >> I'm guessing my confusion is perhaps over how the SHtml.link magic works?
>
> >> Any suggestions of where I might poke around next?
>
> >> I'm using 1.1-SNAPSHOT (updated a few hours ago).
>
> >> Thank you
> >> Richard
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