app/django/contrib/formtools/utils.py
author Madhusudan C.S. <madhusudancs@gmail.com>
Fri, 05 Jun 2009 21:27:03 +0200
changeset 2397 d943fa182fae
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Moved the GHOP module into the modules package. This also includes moving the templates and content into their respective place inside the Soc folder. This is to avoid adding every folder to the app.yaml file. Patch by: Madhusudan C.S. and Lennard de Rijk Reviewed by: Lennard de Rijk

try:
    import cPickle as pickle
except ImportError:
    import pickle

from django.conf import settings
from django.utils.hashcompat import md5_constructor
from django.forms import BooleanField

def security_hash(request, form, *args):
    """
    Calculates a security hash for the given Form instance.

    This creates a list of the form field names/values in a deterministic
    order, pickles the result with the SECRET_KEY setting, then takes an md5
    hash of that.
    """

    data = [(bf.name, bf.field.clean(bf.data) or '') for bf in form]
    data.extend(args)
    data.append(settings.SECRET_KEY)

    # Use HIGHEST_PROTOCOL because it's the most efficient. It requires
    # Python 2.3, but Django requires 2.3 anyway, so that's OK.
    pickled = pickle.dumps(data, pickle.HIGHEST_PROTOCOL)

    return md5_constructor(pickled).hexdigest()