app/django/contrib/formtools/utils.py
author Lennard de Rijk <ljvderijk@gmail.com>
Wed, 09 Sep 2009 21:14:22 +0200
changeset 2895 cad75f6ba411
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Added the GHOP modules to the callback. The ENABLE_MODULE has been added to ensure that the current build does not suffer from any weird artefacts that might occur due to the presence of this module. Of course in time it will be removed. Thanks Madhusudan for getting us this far ^_^. Minor CSS and image patches should follow shortly.

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()