| 12345678910111213141516171819202122232425262728 |
- from __future__ import unicode_literals
- # Do not try cPickle here (see #18340)
- import pickle
- from django.utils.crypto import salted_hmac
- from django.utils import six
- def form_hmac(form):
- """
- Calculates a security hash for the given Form instance.
- """
- data = []
- for bf in form:
- # Get the value from the form data. If the form allows empty or hasn't
- # changed then don't call clean() to avoid trigger validation errors.
- if form.empty_permitted and not form.has_changed():
- value = bf.data or ''
- else:
- value = bf.field.clean(bf.data) or ''
- if isinstance(value, six.string_types):
- value = value.strip()
- data.append((bf.name, value))
- pickled = pickle.dumps(data, pickle.HIGHEST_PROTOCOL)
- key_salt = 'django.contrib.formtools'
- return salted_hmac(key_salt, pickled).hexdigest()
|
