B4J Question [Jserver ] How to make a session persistent and avoid the user relogging with each refresh?

[Waldemar Lima]

Hello guys, I'm using websocket to manage the sessions on my page...
However, every F5, the session is closed and I need to log in again... how do I solve this??

 

[jahswant]

[Server] Persistent sessions

Session are usually stored in memory so if you restart the server all the sessions (including their attributes) will be lost. So if you want to save sessions data on disk place the code below in the code module and call the sub ServerUsePersistentSessions. StoreDirectory - where the sessions...

www.b4x.com

 

[OliverA]

You need to implement this:

[server] Automatic Reconnecting WebSocket

When working with WebSocket handlers the client maintains an online connection. The connection is expected to be kept alive for as long as needed. However there are cases where the connection can be temporary broken. Especially when the client is a mobile browser. Using the...

www.b4x.com

If you then want sessions survive server reboots, you can also implement post #2

 

[aeric]

How do you create the session and read it?

From B4J Server template:

Sub Handle(req As ServletRequest, resp As ServletResponse)
    Try
        If req.GetSession.HasAttribute("myNumber") = False Then
            req.GetSession.SetAttribute("myNumber", Rnd(0, 101))
        End If
        Dim myNumber As Int = req.GetSession.GetAttribute("myNumber")
        Dim n As String = req.GetParameter("number")
        If IsNumber(n) = False Then
            resp.Write("Please enter a valid number.")
        Else
            If n > myNumber Then
                resp.Write("My number is smaller.")
            Else If n < myNumber Then
                resp.Write("My number is larger.")
            Else
                resp.Write("Well done!!!")
            End If
        End If
    Catch
        resp.SendError(500, "error....")
    End Try
End Sub

 

[Waldemar Lima]

[Server] Persistent sessions

Session are usually stored in memory so if you restart the server all the sessions (including their attributes) will be lost. So if you want to save sessions data on disk place the code below in the code module and call the sub ServerUsePersistentSessions. StoreDirectory - where the sessions...

www.b4x.com

how can i use it ?
have some example ?

 

[aeric]

every F5

Do you mean F5 on B4J (Debug), not F5 on web browser (Refresh)?

You may try using Cookie or LocalStorage.

 

[Waldemar Lima]

Do you mean F5 on B4J (Debug), not F5 on web browser (Refresh)?

You may try using Cookie or LocalStorage.

i mean : F5 on web browser (Refresh), Even using session, whenever I refresh the page, the session is closed.and I have to log in again... I wanted to leave the session with an expiration time
cookies works on websocket handler ?

 

[OliverA]

i mean : F5 on web browser (Refresh),

Have you checked out the link in post #3? Yes, WebSockets can work with sessions (which are tracked via a session cookie)

 

[Waldemar Lima]

Have you checked out the link in post #3? Yes, WebSockets can work with sessions (which are tracked via a session cookie)

I'm using this to create sessions, and I still have the problem mentioned above.

'main server class'
srvr.AddFilter("/b4j_ws.js", "SessionCreator", False)


'Session Filter class
Sub Class_Globals
    
End Sub

Public Sub Initialize
    
End Sub

'Return True to allow the request to proceed.
Public Sub Filter(req As ServletRequest, resp As ServletResponse) As Boolean
    Log("sessão do crl")
    req.GetSession
    Return True
End Sub

 

[OliverA]

I'm using this to create sessions, and I still have the problem mentioned above.

You followed the instructions of the link by including the additional JavaScript file (mentioned and included in the link) and you did the code changes as shown in the link and you are still having issues?