app/django/contrib/formtools/utils.py
author Sverre Rabbelier <srabbelier@gmail.com>
Sat, 18 Apr 2009 12:37:12 +0000
changeset 2204 ccbc8bb5ce86
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Split edit and create into different methods This makes removes unneeded responsibility from the edit view and makes it possible to more tightly restrict the usage of the edit and create views to only creating/editing. 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()