app/django/contrib/formtools/utils.py
author Sverre Rabbelier <srabbelier@gmail.com>
Wed, 26 Nov 2008 23:55:10 +0000
changeset 593 01f8c7aabb7e
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Removed cruft from the tests directory The current tests were outdated (they tested code that no longer exists), and were causing the test suite (insofar as it deserves that name) to fail for no reason. Patch by: Sverre Rabbelier

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()