B4J Question Could client wait on response stream?

[schimanski]

I try to send a job to the server. After that, the server loads the needed resourcces from another server and send the result back to the response stream of the client. The problem is, that the job is mostly success before the response stream is available, so job.getstring is emty. Is it possible that the client could wait on the positive result of the response?

'Client-Code:
Dim Job As HttpJob
Job.Initialize("kg", Me)
Job.Tag=Fremdserver
Job.PostString(ServerPfad & "&type=kg" & ......)

Sub JobDone (job As HttpJob)
    Select job.JobName
        Case "kg"
            If Job.Success Then    Log(Job.getstring)
    ...
End Sub
   
'Server-Code:          
Sub Handle(req As ServletRequest, resp As ServletResponse)
    Dim In As InputStream = req.InputStream
    Dim reqType As String = req.GetParameter("type")
    ...
    Select reqType

        Case "kg"
               
            Dim tr As TextReader
            tr.Initialize(In)
            Dim Standort As String = tr.ReadAll
            Dim rs As ResumableSub = KG_Fremdserver_downloaden("Test", "Test"))
            Wait For(rs) Complete (Result As String)
            resp.Write(Result)   '<---------- result to the client
        ...
        ...
End Sub      
       
Private Sub KG_Fremdserver_downloaden(Standort As String, konferenzname As String) As ResumableSub
   
    Dim AnyString As String=""
   
    Dim KGFremdserver As HttpJob
    KGFremdserver.Initialize("", Me)
    Dim url As String = serverpfad & "/" .....

    KGFremdserver.Download2(url, Array As String("...."))
    Wait For (KGFremdserver) JobDone (KGFremdserver As HttpJob)
    KGFremdserver.Release
    If KGFremdserver.Success Then
        ...
        ....
        Return AnyString
    End If
   
    Return AnyString
End Sub

 

[Erel]

It is not possible to do it like this. The response will be sent once the code returns from the Handle sub.
Calling Wait For (or Sleep) is equivalent to calling Return.

Consider switching to a WebSocket handler. With a WebSocket connection you can send data from the server to the client.

 

[schimanski]

Short reply: The websocket handler is a top solution for my needs above.