app/django/contrib/formtools/utils.py
author Sverre Rabbelier <srabbelier@gmail.com>
Thu, 16 Oct 2008 23:23:16 +0000
changeset 363 d35ffa6ca643
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Add a framework for generic views This commit does not enable the new code, as such there should be no change in functionality. In order to use the new code the maps.py file should be updated to point at the new views/models/sponsor.py module. Patch by: Sverre Rabbelier Reviewed by: to-be-reviewed

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()