Question

in a form, I submit data to a python webapp handler (all Google App Engine based) using a HTTP POST request. In this script, I first check if the user is logged in and if not, I use users.create_login_url(…) to redirect the user first to the login page.

How can I ensure that after login the user is not just forwarded to my python script again, but that also the POST variables are preserved? The only way I found was turning all POST variables into URL parameters and adding it to the URL.

Is that possible at all?

Answer 1

Normally, I’d store it in session variables. I’ve used gae-sessions before and found it easy. It persists to the datastore and memcaches behind the scenes for speed. Looks like this:

from gaesessions import get_current_session
session = get_current_session()
if session.is_active():
    c = session.get('counter', 0)
    session['counter'] = c + 1
    session['blah'] = 325
    del session.blah  # remove 'blah' from the session

Or you could be all HTML5y and use localStorage.