app/django/contrib/formtools/utils.py
author Todd Larsen <tlarsen@google.com>
Wed, 15 Oct 2008 21:27:47 +0000
changeset 347 52676c696cd4
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
First phase of making the / (site/home) view generic enough to use it for Sponsor "home" page, Program "home" page, Organization "home" page, etc. when combined with HomeSettings. First phase of addressing this issue: http://code.google.com/p/soc/issues/detail?id=64 by factoring "Site Settings" apart from the site/home stuff. Patch by: Todd Larsen Review by: Pawel Solyga Review URL: http://codereviews.googleopensourceprograms.com/1405

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()