I've got a JPA Lift site and have set up a login in which the User's id
is stored in a session variable thus, as shown below.
This works just fine. The user can log in and go from page to page. But
after some random number of clicks, whoops! I'm suddenly no longer
logged in.
Hmmm. I must be doing something wrong. I just love intermittent failures.
(My user object is a Member.)
object CurrentUserId extends SessionVar[Can[Long]](Empty)
object RequestedURL extends SessionVar[Can[String]](Empty)
object CurrentUser extends RequestVar[Can[Member]](Empty)
object AccessControl {
def login(): Can[LiftResponse] = {
if (S.post_?) {
try {
val member: Member = Model.createNamedQuery[Member](
"findMemberByEmailAddress",
"emailAddress" ->
S.param("emailAddress").openOr("")).getSingleResult()
if (member.authenticate(S.param("password").openOr(""))) {
CurrentUser(Full(member))
CurrentUserId(Full(member.id))
}
else
S.error("Go away!")
} catch {
case x: NoResultException =>
S.error("This thing don't work.")
case _ => S.error("Done broke. Ouch.")
}
}
val uri = RequestedURL.openOr("/")
RequestedURL(Empty)
Full(RedirectResponse(uri))
}
def logout(): Can[LiftResponse] = {
CurrentUser(Empty)
CurrentUserId(Empty)
Full(RedirectResponse(S.param("path").openOr("/")))
}
def isAuthenticated_?() : Boolean = CurrentUserId.is match {
case Empty => false
case Full(_) => true
case _ => false
}
Then:
Menu(Loc("forum", List("forum", "index"), "Forum", LocGroup("global"),
If(isAuthenticated_?, "Please log in to see this page.")))
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