app/django/contrib/formtools/utils.py
author Lennard de Rijk <ljvderijk@gmail.com>
Tue, 03 Feb 2009 08:25:47 +0000
changeset 1195 cbef45d75942
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Fixed a bug where a GMAP error message would be displayed when the form was not valid. The wrong params were used, so the wrong template was used to display the form. This also caused the instruction_text to dissapear. 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()