app/django/contrib/formtools/utils.py
author Lennard de Rijk <ljvderijk@gmail.com>
Sun, 01 Feb 2009 17:14:42 +0000
changeset 1157 76e2ed09661c
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Added status property to the user model. This is to accommodate the ability to exclude users from using the website. Note that since the access modules is currently undergoing some reconstruction changing the status will not actually effect the User yet. Patch by: Lennard de Rijk 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()