[mod_python] pass variables between functions.

Fri Feb 11 15:36:12 EST 2005

Use the session variable, which serializes the data in /tmp/mp_*.

Here's what you do (or what i did to make it work).

# Create a new session based on sessid passed through the form in a hidden field
def myhandler(req, sessid=""):
  ...
  sess = Session(req, sessid, None, 36000, 0)  #change sessid for None
if it's a first-time user
  sess.load()
  sess['mydict'] = <some value>
  .....
   sess.save()

   myTemplate = psp.PSP(req, filename='test.html')
   myTemplate = run(vars = {'sessid':sessid})

#Now in your html template (PSP) file (test.html)
<html>
.....
<input type="hidden" name="sessid" value="<%=sessid%>">
.....
</html>

So what you're doing is passing around the sessid to hidden form fields.
And you get a different sessid for each client connection.

Issue a ( watch -d 'cat /tmp/mp_sess.dbm.dir' ) command to view new
sessid being created (not at each page, but at each new client
connection.

~= Chris =~

On Fri, 11 Feb 2005 14:55:11 -0500, donnie jones
<donniejones18 at gmail.com> wrote:
> I assume that it would be necessary to pass the session id
> through a url or value in a form and then use that session id
> to retrieve the session...
> 
> I wonder performance wise if it would be better to use the
> session or an external database...hmm.
> 
> Thanks.
> __
> Donnie
> 
> 
> On Fri, 11 Feb 2005 13:41:14 -0600, Nick <nick at dd.revealed.net> wrote:
> > Well, essentially that *is* an external database.  I haven't used the one
> > that comes with mod_python, but is it possible for all requests to use the
> > same session ID so that they all see the same session, rather than one for
> > each client?
> >
> > Nick
> >
> > donnie jones wrote:
> > > Ack... heh, I'd rather not go for that.  ;-)
> > >
> > > I wonder if I could store the variable in a session?
> > > In my actual application, the variable is a dictionary, do you think
> > > it would be
> > > fine to store a dictionary inside a session's dictionary?
> > >
> > > Thanks for everyone's help.
> > > __
> > > Donnie
> > >
> > >
> > > On Fri, 11 Feb 2005 13:10:21 -0600, Nick <nick at dd.revealed.net> wrote:
> > >
> > >>I think your only recourse here is to lower the children to 1 and up the
> > >>number of threads (a la windows), or else use an external database to store
> > >>your variables.
> > >>
> > >>Nick
> > >>
> > >>donnie jones wrote:
> > >>
> > >>>---------- Forwarded message ----------
> > >>>From: donnie jones <donniejones18 at gmail.com>
> > >>>Date: Fri, 11 Feb 2005 14:02:48 -0500
> > >>>Subject: Re: [mod_python] pass variables between functions.
> > >>>To: Scott Sanders <sanders at apache.org>
> > >>>
> > >>>
> > >>>I believe I am having this problem because if I reload the x=x+1
> > >>>function many times, sometimes it will increment the value and
> > >>>sometimes it won't... so I assume it is depending upon which thread
> > >>>has loaded.
> > >>>
> > >>>Is there a way around this so that I have a consistent value between
> > >>>the functions?
> > >>>
> > >>>Thank you.
> > _______________________________________________
> > Mod_python mailing list
> > Mod_python at modpython.org
> > http://mailman.modpython.org/mailman/listinfo/mod_python
> >
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