app/django/contrib/formtools/utils.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Thu, 16 Oct 2008 15:22:41 +0000
changeset 358 843d83b87282
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Add page=None parameter to all views. Information from page argument (which is soc.logic.site.page.Page object) is going to be used later in views code and for some context values. Fix some indentions in __doc__ strings. Add proper __doc__ string for all() function in sponsor/list.py module. Patch by: Pawel Solyga Review 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()